Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at √sNN=200 GeV and implications for direct photon production

A. Adare, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, A. Al-Jamel, K. Aoki, L. Aphecetche, R. Armendariz, S. H. Aronson, J. Asai, E. T. Atomssa, R. Averbeck, T. C. Awes, B. Azmoun, V. Babintsev, G. Baksay, L. Baksay & 402 others A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, S. Bathe, S. Batsouli, V. Baublis, F. Bauer, A. Bazilevsky, S. Belikov, R. Bennett, Y. Berdnikov, A. A. Bickley, M. T. Bjorndal, J. G. Boissevain, H. Borel, K. Boyle, M. L. Brooks, D. S. Brown, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J. M. Burward-Hoy, S. Butsyk, S. Campbell, J. S. Chai, B. S. Chang, J. L. Charvet, S. Chernichenko, J. Chiba, C. Y. Chi, M. Chiu, I. J. Choi, T. Chujo, P. Chung, A. Churyn, V. Cianciolo, C. R. Cleven, Y. Cobigo, B. A. Cole, M. P. Comets, P. Constantin, M. Csanád, T. Csörgo, T. Dahms, K. Das, G. David, M. B. Deaton, K. Dehmelt, H. Delagrange, A. Denisov, D. D'Enterria, A. Deshpande, E. J. Desmond, O. Dietzsch, A. Dion, M. Donadelli, J. L. Drachenberg, O. Drapier, A. Drees, A. K. Dubey, A. Durum, V. Dzhordzhadze, Y. V. Efremenko, J. Egdemir, F. Ellinghaus, W. S. Emam, A. Enokizono, H. En'Yo, B. Espagnon, S. Esumi, K. O. Eyser, D. E. Fields, M. Finger, M. Finger, F. Fleuret, S. L. Fokin, B. Forestier, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, K. Fujiwara, Y. Fukao, S. Y. Fung, T. Fusayasu, S. Gadrat, I. Garishvili, F. Gastineau, M. Germain, A. Glenn, H. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier De Cassagnac, N. Grau, S. V. Greene, M. Grosse Perdekamp, T. Gunji, H. Å Gustafsson, T. Hachiya, A. Hadj Henni, C. Haegemann, J. S. Haggerty, M. N. Hagiwara, H. Hamagaki, R. Han, H. Harada, E. P. Hartouni, K. Haruna, M. Harvey, E. Haslum, K. Hasuko, R. Hayano, M. Heffner, T. K. Hemmick, T. Hester, J. M. Heuser, X. He, H. Hiejima, J. C. Hill, R. Hobbs, M. Hohlmann, M. Holmes, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, M. G. Hur, T. Ichihara, K. Imai, M. Inaba, Y. Inoue, D. Isenhower, L. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, B. V. Jacak, J. Jia, J. Jin, O. Jinnouchi, B. M. Johnson, K. S. Joo, D. Jouan, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, M. Kaneta, Ju Hwan Kang, H. Kanou, T. Kawagishi, D. Kawall, A. V. Kazantsev, S. Kelly, A. Khanzadeev, J. Kikuchi, D. H. Kim, D. J. Kim, E. Kim, Y. S. Kim, E. Kinney, A. Kiss, E. Kistenev, A. Kiyomichi, J. Klay, C. Klein-Boesing, L. Kochenda, V. Kochetkov, B. Komkov, M. Konno, D. Kotchetkov, A. Kozlov, A. Král, A. Kravitz, P. J. Kroon, J. Kubart, G. J. Kunde, N. Kurihara, K. Kurita, M. J. Kweon, Youngil Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, A. Lebedev, Y. Le Bornec, S. Leckey, D. M. Lee, M. K. Lee, T. Lee, M. J. Leitch, M. A.L. Leite, B. Lenzi, H. Lim, T. Liška, A. Litvinenko, M. X. Liu, X. Li, X. H. Li, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Malakhov, M. D. Malik, V. I. Manko, Y. Mao, L. Mašek, H. Masui, F. Matathias, M. C. McCain, M. McCumber, P. L. McGaughey, Y. Miake, P. Mikeš, K. Miki, T. E. Miller, A. Milov, S. Mioduszewski, G. C. Mishra, M. Mishra, J. T. Mitchell, M. Mitrovski, A. Morreale, D. P. Morrison, J. M. Moss, T. V. Moukhanova, D. Mukhopadhyay, J. Murata, S. Nagamiya, Y. Nagata, J. L. Nagle, M. Naglis, I. Nakagawa, Y. Nakamiya, T. Nakamura, K. Nakano, J. Newby, M. Nguyen, B. E. Norman, R. Nouicer, A. S. Nyanin, J. Nystrand, E. O'Brien, S. X. Oda, C. A. Ogilvie, H. Ohnishi, I. D. Ojha, H. Okada, K. Okada, M. Oka, O. O. Omiwade, A. Oskarsson, I. Otterlund, M. Ouchida, K. Ozawa, R. Pak, D. Pal, A. P.T. Palounek, V. Pantuev, V. Papavassiliou, J. Park, W. J. Park, S. F. Pate, H. Pei, J. C. Peng, H. Pereira, V. Peresedov, D. Yu Peressounko, C. Pinkenburg, R. P. Pisani, M. L. Purschke, A. K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe, I. Ravinovich, K. F. Read, S. Rembeczki, M. Reuter, K. Reygers, V. Riabov, Y. Riabov, G. Roche, A. Romana, M. Rosati, S. S.E. Rosendahl, P. Rosnet, P. Rukoyatkin, V. L. Rykov, S. S. Ryu, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, H. Sakata, V. Samsonov, H. D. Sato, S. Sato, S. Sawada, J. Seele, R. Seidl, V. Semenov, R. Seto, D. Sharma, T. K. Shea, I. Shein, A. Shevel, T. A. Shibata, K. Shigaki, M. Shimomura, T. Shohjoh, K. Shoji, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, C. P. Singh, V. Singh, S. Skutnik, M. Slunečka, W. C. Smith, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, C. Suire, J. P. Sullivan, J. Sziklai, T. Tabaru, S. Takagi, E. M. Takagui, A. Taketani, K. H. Tanaka, Y. Tanaka, K. Tanida, M. J. Tannenbaum, A. Taranenko, P. Tarján, T. L. Thomas, M. Togawa, A. Toia, J. Tojo, L. Tomášek, H. Torii, R. S. Towell, V. N. Tram, I. Tserruya, Y. Tsuchimoto, S. K. Tuli, H. Tydesjö, N. Tyurin, C. Vale, H. Valle, H. W. Van Hecke, J. Velkovska, R. Vertesi, A. A. Vinogradov, M. Virius, V. Vrba, E. Vznuzdaev, M. Wagner, D. Walker, X. R. Wang, Y. Watanabe, J. Wessels, S. N. White, N. Willis, D. Winter, C. L. Woody, M. Wysocki, W. Xie, Y. L. Yamaguchi, A. Yanovich, Z. Yasin, J. Ying, S. Yokkaichi, G. R. Young, I. Younus, I. E. Yushmanov, W. A. Zajc, O. Zaudtke, C. Zhang, S. Zhou, J. Zimányi, L. Zolin

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Abstract

PHENIX has measured the e+e- pair continuum in √sNN=200□ GeV Au+Au and p+p collisions over a wide range of mass and transverse momenta. The e+e- yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate-mass region, between the masses of the φ and the J/ψ meson, the yield is consistent with expectations from correlated cc□ production, although other mechanisms are not ruled out. In the low-mass region, below the φ, the p+p inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of 4.7±0. 4stat±1.5syst±0.9model. At low mass (mee<0.3□ GeV/c2) and high pT (1<pT<5□ GeV/c) an enhanced e+e- pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the p+p is exponential in pT, with inverse slope T=221±19stat±19syst□ MeV. Hydrodynamical models with initial temperatures ranging from Tinit□□300-600□ MeV at times of 0.6-0.15 fm/c after the collision are in qualitative agreement with the direct photon data in Au+Au. For low pT<1□ GeV/c the low-mass region shows a further significant enhancement that increases with centrality and has an inverse slope of T□□100□ MeV. Theoretical models underpredict the low-mass, low-pT enhancement.

Original languageEnglish
Article number034911
JournalPhysical Review C - Nuclear Physics
Volume81
Issue number3
DOIs
Publication statusPublished - 2010 Mar 29

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continuums
collisions
photons
mass spectra
augmentation
mesons
slopes
transverse momentum
momentum
decay
temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Adare, A. ; Afanasiev, S. ; Aidala, C. ; Ajitanand, N. N. ; Akiba, Y. ; Al-Bataineh, H. ; Alexander, J. ; Al-Jamel, A. ; Aoki, K. ; Aphecetche, L. ; Armendariz, R. ; Aronson, S. H. ; Asai, J. ; Atomssa, E. T. ; Averbeck, R. ; Awes, T. C. ; Azmoun, B. ; Babintsev, V. ; Baksay, G. ; Baksay, L. ; Baldisseri, A. ; Barish, K. N. ; Barnes, P. D. ; Bassalleck, B. ; Bathe, S. ; Batsouli, S. ; Baublis, V. ; Bauer, F. ; Bazilevsky, A. ; Belikov, S. ; Bennett, R. ; Berdnikov, Y. ; Bickley, A. A. ; Bjorndal, M. T. ; Boissevain, J. G. ; Borel, H. ; Boyle, K. ; Brooks, M. L. ; Brown, D. S. ; Bucher, D. ; Buesching, H. ; Bumazhnov, V. ; Bunce, G. ; Burward-Hoy, J. M. ; Butsyk, S. ; Campbell, S. ; Chai, J. S. ; Chang, B. S. ; Charvet, J. L. ; Chernichenko, S. ; Chiba, J. ; Chi, C. Y. ; Chiu, M. ; Choi, I. J. ; Chujo, T. ; Chung, P. ; Churyn, A. ; Cianciolo, V. ; Cleven, C. R. ; Cobigo, Y. ; Cole, B. A. ; Comets, M. P. ; Constantin, P. ; Csanád, M. ; Csörgo, T. ; Dahms, T. ; Das, K. ; David, G. ; Deaton, M. B. ; Dehmelt, K. ; Delagrange, H. ; Denisov, A. ; D'Enterria, D. ; Deshpande, A. ; Desmond, E. J. ; Dietzsch, O. ; Dion, A. ; Donadelli, M. ; Drachenberg, J. L. ; Drapier, O. ; Drees, A. ; Dubey, A. K. ; Durum, A. ; Dzhordzhadze, V. ; Efremenko, Y. V. ; Egdemir, J. ; Ellinghaus, F. ; Emam, W. S. ; Enokizono, A. ; En'Yo, H. ; Espagnon, B. ; Esumi, S. ; Eyser, K. O. ; Fields, D. E. ; Finger, M. ; Finger, M. ; Fleuret, F. ; Fokin, S. L. ; Forestier, B. ; Fraenkel, Z. ; Frantz, J. E. ; Franz, A. ; Frawley, A. D. ; Fujiwara, K. ; Fukao, Y. ; Fung, S. Y. ; Fusayasu, T. ; Gadrat, S. ; Garishvili, I. ; Gastineau, F. ; Germain, M. ; Glenn, A. ; Gong, H. ; Gonin, M. ; Gosset, J. ; Goto, Y. ; Granier De Cassagnac, R. ; Grau, N. ; Greene, S. V. ; Grosse Perdekamp, M. ; Gunji, T. ; Gustafsson, H. Å ; Hachiya, T. ; Hadj Henni, A. ; Haegemann, C. ; Haggerty, J. S. ; Hagiwara, M. N. ; Hamagaki, H. ; Han, R. ; Harada, H. ; Hartouni, E. P. ; Haruna, K. ; Harvey, M. ; Haslum, E. ; Hasuko, K. ; Hayano, R. ; Heffner, M. ; Hemmick, T. K. ; Hester, T. ; Heuser, J. M. ; He, X. ; Hiejima, H. ; Hill, J. C. ; Hobbs, R. ; Hohlmann, M. ; Holmes, M. ; Holzmann, W. ; Homma, K. ; Hong, B. ; Horaguchi, T. ; Hornback, D. ; Hur, M. G. ; Ichihara, T. ; Imai, K. ; Inaba, M. ; Inoue, Y. ; Isenhower, D. ; Isenhower, L. ; Ishihara, M. ; Isobe, T. ; Issah, M. ; Isupov, A. ; Jacak, B. V. ; Jia, J. ; Jin, J. ; Jinnouchi, O. ; Johnson, B. M. ; Joo, K. S. ; Jouan, D. ; Kajihara, F. ; Kametani, S. ; Kamihara, N. ; Kamin, J. ; Kaneta, M. ; Kang, Ju Hwan ; Kanou, H. ; Kawagishi, T. ; Kawall, D. ; Kazantsev, A. V. ; Kelly, S. ; Khanzadeev, A. ; Kikuchi, J. ; Kim, D. H. ; Kim, D. J. ; Kim, E. ; Kim, Y. S. ; Kinney, E. ; Kiss, A. ; Kistenev, E. ; Kiyomichi, A. ; Klay, J. ; Klein-Boesing, C. ; Kochenda, L. ; Kochetkov, V. ; Komkov, B. ; Konno, M. ; Kotchetkov, D. ; Kozlov, A. ; Král, A. ; Kravitz, A. ; Kroon, P. J. ; Kubart, J. ; Kunde, G. J. ; Kurihara, N. ; Kurita, K. ; Kweon, M. J. ; Kwon, Youngil ; Kyle, G. S. ; Lacey, R. ; Lai, Y. S. ; Lajoie, J. G. ; Lebedev, A. ; Le Bornec, Y. ; Leckey, S. ; Lee, D. M. ; Lee, M. K. ; Lee, T. ; Leitch, M. J. ; Leite, M. A.L. ; Lenzi, B. ; Lim, H. ; Liška, T. ; Litvinenko, A. ; Liu, M. X. ; Li, X. ; Li, X. H. ; Love, B. ; Lynch, D. ; Maguire, C. F. ; Makdisi, Y. I. ; Malakhov, A. ; Malik, M. D. ; Manko, V. I. ; Mao, Y. ; Mašek, L. ; Masui, H. ; Matathias, F. ; McCain, M. C. ; McCumber, M. ; McGaughey, P. L. ; Miake, Y. ; Mikeš, P. ; Miki, K. ; Miller, T. E. ; Milov, A. ; Mioduszewski, S. ; Mishra, G. C. ; Mishra, M. ; Mitchell, J. T. ; Mitrovski, M. ; Morreale, A. ; Morrison, D. P. ; Moss, J. M. ; Moukhanova, T. V. ; Mukhopadhyay, D. ; Murata, J. ; Nagamiya, S. ; Nagata, Y. ; Nagle, J. L. ; Naglis, M. ; Nakagawa, I. ; Nakamiya, Y. ; Nakamura, T. ; Nakano, K. ; Newby, J. ; Nguyen, M. ; Norman, B. E. ; Nouicer, R. ; Nyanin, A. S. ; Nystrand, J. ; O'Brien, E. ; Oda, S. X. ; Ogilvie, C. A. ; Ohnishi, H. ; Ojha, I. D. ; Okada, H. ; Okada, K. ; Oka, M. ; Omiwade, O. O. ; Oskarsson, A. ; Otterlund, I. ; Ouchida, M. ; Ozawa, K. ; Pak, R. ; Pal, D. ; Palounek, A. P.T. ; Pantuev, V. ; Papavassiliou, V. ; Park, J. ; Park, W. J. ; Pate, S. F. ; Pei, H. ; Peng, J. C. ; Pereira, H. ; Peresedov, V. ; Peressounko, D. Yu ; Pinkenburg, C. ; Pisani, R. P. ; Purschke, M. L. ; Purwar, A. K. ; Qu, H. ; Rak, J. ; Rakotozafindrabe, A. ; Ravinovich, I. ; Read, K. F. ; Rembeczki, S. ; Reuter, M. ; Reygers, K. ; Riabov, V. ; Riabov, Y. ; Roche, G. ; Romana, A. ; Rosati, M. ; Rosendahl, S. S.E. ; Rosnet, P. ; Rukoyatkin, P. ; Rykov, V. L. ; Ryu, S. S. ; Sahlmueller, B. ; Saito, N. ; Sakaguchi, T. ; Sakai, S. ; Sakata, H. ; Samsonov, V. ; Sato, H. D. ; Sato, S. ; Sawada, S. ; Seele, J. ; Seidl, R. ; Semenov, V. ; Seto, R. ; Sharma, D. ; Shea, T. K. ; Shein, I. ; Shevel, A. ; Shibata, T. A. ; Shigaki, K. ; Shimomura, M. ; Shohjoh, T. ; Shoji, K. ; Sickles, A. ; Silva, C. L. ; Silvermyr, D. ; Silvestre, C. ; Sim, K. S. ; Singh, C. P. ; Singh, V. ; Skutnik, S. ; Slunečka, M. ; Smith, W. C. ; Soldatov, A. ; Soltz, R. A. ; Sondheim, W. E. ; Sorensen, S. P. ; Sourikova, I. V. ; Staley, F. ; Stankus, P. W. ; Stenlund, E. ; Stepanov, M. ; Ster, A. ; Stoll, S. P. ; Sugitate, T. ; Suire, C. ; Sullivan, J. P. ; Sziklai, J. ; Tabaru, T. ; Takagi, S. ; Takagui, E. M. ; Taketani, A. ; Tanaka, K. H. ; Tanaka, Y. ; Tanida, K. ; Tannenbaum, M. J. ; Taranenko, A. ; Tarján, P. ; Thomas, T. L. ; Togawa, M. ; Toia, A. ; Tojo, J. ; Tomášek, L. ; Torii, H. ; Towell, R. S. ; Tram, V. N. ; Tserruya, I. ; Tsuchimoto, Y. ; Tuli, S. K. ; Tydesjö, H. ; Tyurin, N. ; Vale, C. ; Valle, H. ; Van Hecke, H. W. ; Velkovska, J. ; Vertesi, R. ; Vinogradov, A. A. ; Virius, M. ; Vrba, V. ; Vznuzdaev, E. ; Wagner, M. ; Walker, D. ; Wang, X. R. ; Watanabe, Y. ; Wessels, J. ; White, S. N. ; Willis, N. ; Winter, D. ; Woody, C. L. ; Wysocki, M. ; Xie, W. ; Yamaguchi, Y. L. ; Yanovich, A. ; Yasin, Z. ; Ying, J. ; Yokkaichi, S. ; Young, G. R. ; Younus, I. ; Yushmanov, I. E. ; Zajc, W. A. ; Zaudtke, O. ; Zhang, C. ; Zhou, S. ; Zimányi, J. ; Zolin, L. / Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at √sNN=200 GeV and implications for direct photon production. In: Physical Review C - Nuclear Physics. 2010 ; Vol. 81, No. 3.
@article{79500c24f6854d1e882ef7ccef4f770c,
title = "Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at √sNN=200 GeV and implications for direct photon production",
abstract = "PHENIX has measured the e+e- pair continuum in √sNN=200□ GeV Au+Au and p+p collisions over a wide range of mass and transverse momenta. The e+e- yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate-mass region, between the masses of the φ and the J/ψ meson, the yield is consistent with expectations from correlated cc□ production, although other mechanisms are not ruled out. In the low-mass region, below the φ, the p+p inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of 4.7±0. 4stat±1.5syst±0.9model. At low mass (mee<0.3□ GeV/c2) and high pT (1+e- pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the p+p is exponential in pT, with inverse slope T=221±19stat±19syst□ MeV. Hydrodynamical models with initial temperatures ranging from Tinit□□300-600□ MeV at times of 0.6-0.15 fm/c after the collision are in qualitative agreement with the direct photon data in Au+Au. For low pT<1□ GeV/c the low-mass region shows a further significant enhancement that increases with centrality and has an inverse slope of T□□100□ MeV. Theoretical models underpredict the low-mass, low-pT enhancement.",
author = "A. Adare and S. Afanasiev and C. Aidala and Ajitanand, {N. N.} and Y. Akiba and H. Al-Bataineh and J. Alexander and A. Al-Jamel and K. Aoki and L. Aphecetche and R. Armendariz and Aronson, {S. H.} and J. Asai and Atomssa, {E. T.} and R. Averbeck and Awes, {T. C.} and B. Azmoun and V. Babintsev and G. Baksay and L. Baksay and A. Baldisseri and Barish, {K. N.} and Barnes, {P. D.} and B. Bassalleck and S. Bathe and S. Batsouli and V. Baublis and F. Bauer and A. Bazilevsky and S. Belikov and R. Bennett and Y. Berdnikov and Bickley, {A. A.} and Bjorndal, {M. T.} and Boissevain, {J. G.} and H. Borel and K. Boyle and Brooks, {M. L.} and Brown, {D. S.} and D. Bucher and H. Buesching and V. Bumazhnov and G. Bunce and Burward-Hoy, {J. M.} and S. Butsyk and S. Campbell and Chai, {J. S.} and Chang, {B. S.} and Charvet, {J. L.} and S. Chernichenko and J. Chiba and Chi, {C. Y.} and M. Chiu and Choi, {I. J.} and T. Chujo and P. Chung and A. Churyn and V. Cianciolo and Cleven, {C. R.} and Y. Cobigo and Cole, {B. A.} and Comets, {M. P.} and P. Constantin and M. Csan{\'a}d and T. Cs{\"o}rgo and T. Dahms and K. Das and G. David and Deaton, {M. B.} and K. Dehmelt and H. Delagrange and A. Denisov and D. D'Enterria and A. Deshpande and Desmond, {E. J.} and O. Dietzsch and A. Dion and M. Donadelli and Drachenberg, {J. L.} and O. Drapier and A. Drees and Dubey, {A. K.} and A. Durum and V. Dzhordzhadze and Efremenko, {Y. V.} and J. Egdemir and F. Ellinghaus and Emam, {W. S.} and A. Enokizono and H. En'Yo and B. Espagnon and S. Esumi and Eyser, {K. O.} and Fields, {D. E.} and M. Finger and M. Finger and F. Fleuret and Fokin, {S. L.} and B. Forestier and Z. Fraenkel and Frantz, {J. E.} and A. Franz and Frawley, {A. D.} and K. Fujiwara and Y. Fukao and Fung, {S. Y.} and T. Fusayasu and S. Gadrat and I. Garishvili and F. Gastineau and M. Germain and A. Glenn and H. Gong and M. Gonin and J. Gosset and Y. Goto and {Granier De Cassagnac}, R. and N. Grau and Greene, {S. V.} and {Grosse Perdekamp}, M. and T. Gunji and Gustafsson, {H. {\AA}} and T. Hachiya and {Hadj Henni}, A. and C. Haegemann and Haggerty, {J. S.} and Hagiwara, {M. N.} and H. Hamagaki and R. Han and H. Harada and Hartouni, {E. P.} and K. Haruna and M. Harvey and E. Haslum and K. Hasuko and R. Hayano and M. Heffner and Hemmick, {T. K.} and T. Hester and Heuser, {J. M.} and X. He and H. Hiejima and Hill, {J. C.} and R. Hobbs and M. Hohlmann and M. Holmes and W. Holzmann and K. Homma and B. Hong and T. Horaguchi and D. Hornback and Hur, {M. G.} and T. Ichihara and K. Imai and M. Inaba and Y. Inoue and D. Isenhower and L. Isenhower and M. Ishihara and T. Isobe and M. Issah and A. Isupov and Jacak, {B. V.} and J. Jia and J. Jin and O. Jinnouchi and Johnson, {B. M.} and Joo, {K. S.} and D. Jouan and F. Kajihara and S. Kametani and N. Kamihara and J. Kamin and M. Kaneta and Kang, {Ju Hwan} and H. Kanou and T. Kawagishi and D. Kawall and Kazantsev, {A. V.} and S. Kelly and A. Khanzadeev and J. Kikuchi and Kim, {D. H.} and Kim, {D. J.} and E. Kim and Kim, {Y. S.} and E. Kinney and A. Kiss and E. Kistenev and A. Kiyomichi and J. Klay and C. Klein-Boesing and L. Kochenda and V. Kochetkov and B. Komkov and M. Konno and D. Kotchetkov and A. Kozlov and A. Kr{\'a}l and A. Kravitz and Kroon, {P. J.} and J. Kubart and Kunde, {G. J.} and N. Kurihara and K. Kurita and Kweon, {M. J.} and Youngil Kwon and Kyle, {G. S.} and R. Lacey and Lai, {Y. S.} and Lajoie, {J. G.} and A. Lebedev and {Le Bornec}, Y. and S. Leckey and Lee, {D. M.} and Lee, {M. K.} and T. Lee and Leitch, {M. J.} and Leite, {M. A.L.} and B. Lenzi and H. Lim and T. Liška and A. Litvinenko and Liu, {M. X.} and X. Li and Li, {X. H.} and B. Love and D. Lynch and Maguire, {C. F.} and Makdisi, {Y. I.} and A. Malakhov and Malik, {M. D.} and Manko, {V. I.} and Y. Mao and L. Mašek and H. Masui and F. Matathias and McCain, {M. C.} and M. McCumber and McGaughey, {P. L.} and Y. Miake and P. Mikeš and K. Miki and Miller, {T. E.} and A. Milov and S. Mioduszewski and Mishra, {G. C.} and M. Mishra and Mitchell, {J. T.} and M. Mitrovski and A. Morreale and Morrison, {D. P.} and Moss, {J. M.} and Moukhanova, {T. V.} and D. Mukhopadhyay and J. Murata and S. Nagamiya and Y. Nagata and Nagle, {J. L.} and M. Naglis and I. Nakagawa and Y. Nakamiya and T. Nakamura and K. Nakano and J. Newby and M. Nguyen and Norman, {B. E.} and R. Nouicer and Nyanin, {A. S.} and J. Nystrand and E. O'Brien and Oda, {S. X.} and Ogilvie, {C. A.} and H. Ohnishi and Ojha, {I. D.} and H. Okada and K. Okada and M. Oka and Omiwade, {O. O.} and A. Oskarsson and I. Otterlund and M. Ouchida and K. Ozawa and R. Pak and D. Pal and Palounek, {A. P.T.} and V. Pantuev and V. Papavassiliou and J. Park and Park, {W. J.} and Pate, {S. F.} and H. Pei and Peng, {J. C.} and H. Pereira and V. Peresedov and Peressounko, {D. Yu} and C. Pinkenburg and Pisani, {R. P.} and Purschke, {M. L.} and Purwar, {A. K.} and H. Qu and J. Rak and A. Rakotozafindrabe and I. Ravinovich and Read, {K. F.} and S. Rembeczki and M. Reuter and K. Reygers and V. Riabov and Y. Riabov and G. Roche and A. Romana and M. Rosati and Rosendahl, {S. S.E.} and P. Rosnet and P. Rukoyatkin and Rykov, {V. L.} and Ryu, {S. S.} and B. Sahlmueller and N. Saito and T. Sakaguchi and S. Sakai and H. Sakata and V. Samsonov and Sato, {H. D.} and S. Sato and S. Sawada and J. Seele and R. Seidl and V. Semenov and R. Seto and D. Sharma and Shea, {T. K.} and I. Shein and A. Shevel and Shibata, {T. A.} and K. Shigaki and M. Shimomura and T. Shohjoh and K. Shoji and A. Sickles and Silva, {C. L.} and D. Silvermyr and C. Silvestre and Sim, {K. S.} and Singh, {C. P.} and V. Singh and S. Skutnik and M. Slunečka and Smith, {W. C.} and A. Soldatov and Soltz, {R. A.} and Sondheim, {W. E.} and Sorensen, {S. P.} and Sourikova, {I. V.} and F. Staley and Stankus, {P. W.} and E. Stenlund and M. Stepanov and A. Ster and Stoll, {S. P.} and T. Sugitate and C. Suire and Sullivan, {J. P.} and J. Sziklai and T. Tabaru and S. Takagi and Takagui, {E. M.} and A. Taketani and Tanaka, {K. H.} and Y. Tanaka and K. Tanida and Tannenbaum, {M. J.} and A. Taranenko and P. Tarj{\'a}n and Thomas, {T. L.} and M. Togawa and A. Toia and J. Tojo and L. Tom{\'a}šek and H. Torii and Towell, {R. S.} and Tram, {V. N.} and I. Tserruya and Y. Tsuchimoto and Tuli, {S. K.} and H. Tydesj{\"o} and N. Tyurin and C. Vale and H. Valle and {Van Hecke}, {H. W.} and J. Velkovska and R. Vertesi and Vinogradov, {A. A.} and M. Virius and V. Vrba and E. Vznuzdaev and M. Wagner and D. Walker and Wang, {X. R.} and Y. Watanabe and J. Wessels and White, {S. N.} and N. Willis and D. Winter and Woody, {C. L.} and M. Wysocki and W. Xie and Yamaguchi, {Y. L.} and A. Yanovich and Z. Yasin and J. Ying and S. Yokkaichi and Young, {G. R.} and I. Younus and Yushmanov, {I. E.} and Zajc, {W. A.} and O. Zaudtke and C. Zhang and S. Zhou and J. Zim{\'a}nyi and L. Zolin",
year = "2010",
month = "3",
day = "29",
doi = "10.1103/PhysRevC.81.034911",
language = "English",
volume = "81",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
number = "3",

}

Adare, A, Afanasiev, S, Aidala, C, Ajitanand, NN, Akiba, Y, Al-Bataineh, H, Alexander, J, Al-Jamel, A, Aoki, K, Aphecetche, L, Armendariz, R, Aronson, SH, Asai, J, Atomssa, ET, Averbeck, R, Awes, TC, Azmoun, B, Babintsev, V, Baksay, G, Baksay, L, Baldisseri, A, Barish, KN, Barnes, PD, Bassalleck, B, Bathe, S, Batsouli, S, Baublis, V, Bauer, F, Bazilevsky, A, Belikov, S, Bennett, R, Berdnikov, Y, Bickley, AA, Bjorndal, MT, Boissevain, JG, Borel, H, Boyle, K, Brooks, ML, Brown, DS, Bucher, D, Buesching, H, Bumazhnov, V, Bunce, G, Burward-Hoy, JM, Butsyk, S, Campbell, S, Chai, JS, Chang, BS, Charvet, JL, Chernichenko, S, Chiba, J, Chi, CY, Chiu, M, Choi, IJ, Chujo, T, Chung, P, Churyn, A, Cianciolo, V, Cleven, CR, Cobigo, Y, Cole, BA, Comets, MP, Constantin, P, Csanád, M, Csörgo, T, Dahms, T, Das, K, David, G, Deaton, MB, Dehmelt, K, Delagrange, H, Denisov, A, D'Enterria, D, Deshpande, A, Desmond, EJ, Dietzsch, O, Dion, A, Donadelli, M, Drachenberg, JL, Drapier, O, Drees, A, Dubey, AK, Durum, A, Dzhordzhadze, V, Efremenko, YV, Egdemir, J, Ellinghaus, F, Emam, WS, Enokizono, A, En'Yo, H, Espagnon, B, Esumi, S, Eyser, KO, Fields, DE, Finger, M, Finger, M, Fleuret, F, Fokin, SL, Forestier, B, Fraenkel, Z, Frantz, JE, Franz, A, Frawley, AD, Fujiwara, K, Fukao, Y, Fung, SY, Fusayasu, T, Gadrat, S, Garishvili, I, Gastineau, F, Germain, M, Glenn, A, Gong, H, Gonin, M, Gosset, J, Goto, Y, Granier De Cassagnac, R, Grau, N, Greene, SV, Grosse Perdekamp, M, Gunji, T, Gustafsson, HÅ, Hachiya, T, Hadj Henni, A, Haegemann, C, Haggerty, JS, Hagiwara, MN, Hamagaki, H, Han, R, Harada, H, Hartouni, EP, Haruna, K, Harvey, M, Haslum, E, Hasuko, K, Hayano, R, Heffner, M, Hemmick, TK, Hester, T, Heuser, JM, He, X, Hiejima, H, Hill, JC, Hobbs, R, Hohlmann, M, Holmes, M, Holzmann, W, Homma, K, Hong, B, Horaguchi, T, Hornback, D, Hur, MG, Ichihara, T, Imai, K, Inaba, M, Inoue, Y, Isenhower, D, Isenhower, L, Ishihara, M, Isobe, T, Issah, M, Isupov, A, Jacak, BV, Jia, J, Jin, J, Jinnouchi, O, Johnson, BM, Joo, KS, Jouan, D, Kajihara, F, Kametani, S, Kamihara, N, Kamin, J, Kaneta, M, Kang, JH, Kanou, H, Kawagishi, T, Kawall, D, Kazantsev, AV, Kelly, S, Khanzadeev, A, Kikuchi, J, Kim, DH, Kim, DJ, Kim, E, Kim, YS, Kinney, E, Kiss, A, Kistenev, E, Kiyomichi, A, Klay, J, Klein-Boesing, C, Kochenda, L, Kochetkov, V, Komkov, B, Konno, M, Kotchetkov, D, Kozlov, A, Král, A, Kravitz, A, Kroon, PJ, Kubart, J, Kunde, GJ, Kurihara, N, Kurita, K, Kweon, MJ, Kwon, Y, Kyle, GS, Lacey, R, Lai, YS, Lajoie, JG, Lebedev, A, Le Bornec, Y, Leckey, S, Lee, DM, Lee, MK, Lee, T, Leitch, MJ, Leite, MAL, Lenzi, B, Lim, H, Liška, T, Litvinenko, A, Liu, MX, Li, X, Li, XH, Love, B, Lynch, D, Maguire, CF, Makdisi, YI, Malakhov, A, Malik, MD, Manko, VI, Mao, Y, Mašek, L, Masui, H, Matathias, F, McCain, MC, McCumber, M, McGaughey, PL, Miake, Y, Mikeš, P, Miki, K, Miller, TE, Milov, A, Mioduszewski, S, Mishra, GC, Mishra, M, Mitchell, JT, Mitrovski, M, Morreale, A, Morrison, DP, Moss, JM, Moukhanova, TV, Mukhopadhyay, D, Murata, J, Nagamiya, S, Nagata, Y, Nagle, JL, Naglis, M, Nakagawa, I, Nakamiya, Y, Nakamura, T, Nakano, K, Newby, J, Nguyen, M, Norman, BE, Nouicer, R, Nyanin, AS, Nystrand, J, O'Brien, E, Oda, SX, Ogilvie, CA, Ohnishi, H, Ojha, ID, Okada, H, Okada, K, Oka, M, Omiwade, OO, Oskarsson, A, Otterlund, I, Ouchida, M, Ozawa, K, Pak, R, Pal, D, Palounek, APT, Pantuev, V, Papavassiliou, V, Park, J, Park, WJ, Pate, SF, Pei, H, Peng, JC, Pereira, H, Peresedov, V, Peressounko, DY, Pinkenburg, C, Pisani, RP, Purschke, ML, Purwar, AK, Qu, H, Rak, J, Rakotozafindrabe, A, Ravinovich, I, Read, KF, Rembeczki, S, Reuter, M, Reygers, K, Riabov, V, Riabov, Y, Roche, G, Romana, A, Rosati, M, Rosendahl, SSE, Rosnet, P, Rukoyatkin, P, Rykov, VL, Ryu, SS, Sahlmueller, B, Saito, N, Sakaguchi, T, Sakai, S, Sakata, H, Samsonov, V, Sato, HD, Sato, S, Sawada, S, Seele, J, Seidl, R, Semenov, V, Seto, R, Sharma, D, Shea, TK, Shein, I, Shevel, A, Shibata, TA, Shigaki, K, Shimomura, M, Shohjoh, T, Shoji, K, Sickles, A, Silva, CL, Silvermyr, D, Silvestre, C, Sim, KS, Singh, CP, Singh, V, Skutnik, S, Slunečka, M, Smith, WC, Soldatov, A, Soltz, RA, Sondheim, WE, Sorensen, SP, Sourikova, IV, Staley, F, Stankus, PW, Stenlund, E, Stepanov, M, Ster, A, Stoll, SP, Sugitate, T, Suire, C, Sullivan, JP, Sziklai, J, Tabaru, T, Takagi, S, Takagui, EM, Taketani, A, Tanaka, KH, Tanaka, Y, Tanida, K, Tannenbaum, MJ, Taranenko, A, Tarján, P, Thomas, TL, Togawa, M, Toia, A, Tojo, J, Tomášek, L, Torii, H, Towell, RS, Tram, VN, Tserruya, I, Tsuchimoto, Y, Tuli, SK, Tydesjö, H, Tyurin, N, Vale, C, Valle, H, Van Hecke, HW, Velkovska, J, Vertesi, R, Vinogradov, AA, Virius, M, Vrba, V, Vznuzdaev, E, Wagner, M, Walker, D, Wang, XR, Watanabe, Y, Wessels, J, White, SN, Willis, N, Winter, D, Woody, CL, Wysocki, M, Xie, W, Yamaguchi, YL, Yanovich, A, Yasin, Z, Ying, J, Yokkaichi, S, Young, GR, Younus, I, Yushmanov, IE, Zajc, WA, Zaudtke, O, Zhang, C, Zhou, S, Zimányi, J & Zolin, L 2010, 'Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at √sNN=200 GeV and implications for direct photon production', Physical Review C - Nuclear Physics, vol. 81, no. 3, 034911. https://doi.org/10.1103/PhysRevC.81.034911

Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at √sNN=200 GeV and implications for direct photon production. / Adare, A.; Afanasiev, S.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Al-Bataineh, H.; Alexander, J.; Al-Jamel, A.; Aoki, K.; Aphecetche, L.; Armendariz, R.; Aronson, S. H.; Asai, J.; Atomssa, E. T.; Averbeck, R.; Awes, T. C.; Azmoun, B.; Babintsev, V.; Baksay, G.; Baksay, L.; Baldisseri, A.; Barish, K. N.; Barnes, P. D.; Bassalleck, B.; Bathe, S.; Batsouli, S.; Baublis, V.; Bauer, F.; Bazilevsky, A.; Belikov, S.; Bennett, R.; Berdnikov, Y.; Bickley, A. A.; Bjorndal, M. T.; Boissevain, J. G.; Borel, H.; Boyle, K.; Brooks, M. L.; Brown, D. S.; Bucher, D.; Buesching, H.; Bumazhnov, V.; Bunce, G.; Burward-Hoy, J. M.; Butsyk, S.; Campbell, S.; Chai, J. S.; Chang, B. S.; Charvet, J. L.; Chernichenko, S.; Chiba, J.; Chi, C. Y.; Chiu, M.; Choi, I. J.; Chujo, T.; Chung, P.; Churyn, A.; Cianciolo, V.; Cleven, C. R.; Cobigo, Y.; Cole, B. A.; Comets, M. P.; Constantin, P.; Csanád, M.; Csörgo, T.; Dahms, T.; Das, K.; David, G.; Deaton, M. B.; Dehmelt, K.; Delagrange, H.; Denisov, A.; D'Enterria, D.; Deshpande, A.; Desmond, E. J.; Dietzsch, O.; Dion, A.; Donadelli, M.; Drachenberg, J. L.; Drapier, O.; Drees, A.; Dubey, A. K.; Durum, A.; Dzhordzhadze, V.; Efremenko, Y. V.; Egdemir, J.; Ellinghaus, F.; Emam, W. S.; Enokizono, A.; En'Yo, H.; Espagnon, B.; Esumi, S.; Eyser, K. O.; Fields, D. E.; Finger, M.; Finger, M.; Fleuret, F.; Fokin, S. L.; Forestier, B.; Fraenkel, Z.; Frantz, J. E.; Franz, A.; Frawley, A. D.; Fujiwara, K.; Fukao, Y.; Fung, S. Y.; Fusayasu, T.; Gadrat, S.; Garishvili, I.; Gastineau, F.; Germain, M.; Glenn, A.; Gong, H.; Gonin, M.; Gosset, J.; Goto, Y.; Granier De Cassagnac, R.; Grau, N.; Greene, S. V.; Grosse Perdekamp, M.; Gunji, T.; Gustafsson, H. Å; Hachiya, T.; Hadj Henni, A.; Haegemann, C.; Haggerty, J. S.; Hagiwara, M. N.; Hamagaki, H.; Han, R.; Harada, H.; Hartouni, E. P.; Haruna, K.; Harvey, M.; Haslum, E.; Hasuko, K.; Hayano, R.; Heffner, M.; Hemmick, T. K.; Hester, T.; Heuser, J. M.; He, X.; Hiejima, H.; Hill, J. C.; Hobbs, R.; Hohlmann, M.; Holmes, M.; Holzmann, W.; Homma, K.; Hong, B.; Horaguchi, T.; Hornback, D.; Hur, M. G.; Ichihara, T.; Imai, K.; Inaba, M.; Inoue, Y.; Isenhower, D.; Isenhower, L.; Ishihara, M.; Isobe, T.; Issah, M.; Isupov, A.; Jacak, B. V.; Jia, J.; Jin, J.; Jinnouchi, O.; Johnson, B. M.; Joo, K. S.; Jouan, D.; Kajihara, F.; Kametani, S.; Kamihara, N.; Kamin, J.; Kaneta, M.; Kang, Ju Hwan; Kanou, H.; Kawagishi, T.; Kawall, D.; Kazantsev, A. V.; Kelly, S.; Khanzadeev, A.; Kikuchi, J.; Kim, D. H.; Kim, D. J.; Kim, E.; Kim, Y. S.; Kinney, E.; Kiss, A.; Kistenev, E.; Kiyomichi, A.; Klay, J.; Klein-Boesing, C.; Kochenda, L.; Kochetkov, V.; Komkov, B.; Konno, M.; Kotchetkov, D.; Kozlov, A.; Král, A.; Kravitz, A.; Kroon, P. J.; Kubart, J.; Kunde, G. J.; Kurihara, N.; Kurita, K.; Kweon, M. J.; Kwon, Youngil; Kyle, G. S.; Lacey, R.; Lai, Y. S.; Lajoie, J. G.; Lebedev, A.; Le Bornec, Y.; Leckey, S.; Lee, D. M.; Lee, M. K.; Lee, T.; Leitch, M. J.; Leite, M. A.L.; Lenzi, B.; Lim, H.; Liška, T.; Litvinenko, A.; Liu, M. X.; Li, X.; Li, X. H.; Love, B.; Lynch, D.; Maguire, C. F.; Makdisi, Y. I.; Malakhov, A.; Malik, M. D.; Manko, V. I.; Mao, Y.; Mašek, L.; Masui, H.; Matathias, F.; McCain, M. C.; McCumber, M.; McGaughey, P. L.; Miake, Y.; Mikeš, P.; Miki, K.; Miller, T. E.; Milov, A.; Mioduszewski, S.; Mishra, G. C.; Mishra, M.; Mitchell, J. T.; Mitrovski, M.; Morreale, A.; Morrison, D. P.; Moss, J. M.; Moukhanova, T. V.; Mukhopadhyay, D.; Murata, J.; Nagamiya, S.; Nagata, Y.; Nagle, J. L.; Naglis, M.; Nakagawa, I.; Nakamiya, Y.; Nakamura, T.; Nakano, K.; Newby, J.; Nguyen, M.; Norman, B. E.; Nouicer, R.; Nyanin, A. S.; Nystrand, J.; O'Brien, E.; Oda, S. X.; Ogilvie, C. A.; Ohnishi, H.; Ojha, I. D.; Okada, H.; Okada, K.; Oka, M.; Omiwade, O. O.; Oskarsson, A.; Otterlund, I.; Ouchida, M.; Ozawa, K.; Pak, R.; Pal, D.; Palounek, A. P.T.; Pantuev, V.; Papavassiliou, V.; Park, J.; Park, W. J.; Pate, S. F.; Pei, H.; Peng, J. C.; Pereira, H.; Peresedov, V.; Peressounko, D. Yu; Pinkenburg, C.; Pisani, R. P.; Purschke, M. L.; Purwar, A. K.; Qu, H.; Rak, J.; Rakotozafindrabe, A.; Ravinovich, I.; Read, K. F.; Rembeczki, S.; Reuter, M.; Reygers, K.; Riabov, V.; Riabov, Y.; Roche, G.; Romana, A.; Rosati, M.; Rosendahl, S. S.E.; Rosnet, P.; Rukoyatkin, P.; Rykov, V. L.; Ryu, S. S.; Sahlmueller, B.; Saito, N.; Sakaguchi, T.; Sakai, S.; Sakata, H.; Samsonov, V.; Sato, H. D.; Sato, S.; Sawada, S.; Seele, J.; Seidl, R.; Semenov, V.; Seto, R.; Sharma, D.; Shea, T. K.; Shein, I.; Shevel, A.; Shibata, T. A.; Shigaki, K.; Shimomura, M.; Shohjoh, T.; Shoji, K.; Sickles, A.; Silva, C. L.; Silvermyr, D.; Silvestre, C.; Sim, K. S.; Singh, C. P.; Singh, V.; Skutnik, S.; Slunečka, M.; Smith, W. C.; Soldatov, A.; Soltz, R. A.; Sondheim, W. E.; Sorensen, S. P.; Sourikova, I. V.; Staley, F.; Stankus, P. W.; Stenlund, E.; Stepanov, M.; Ster, A.; Stoll, S. P.; Sugitate, T.; Suire, C.; Sullivan, J. P.; Sziklai, J.; Tabaru, T.; Takagi, S.; Takagui, E. M.; Taketani, A.; Tanaka, K. H.; Tanaka, Y.; Tanida, K.; Tannenbaum, M. J.; Taranenko, A.; Tarján, P.; Thomas, T. L.; Togawa, M.; Toia, A.; Tojo, J.; Tomášek, L.; Torii, H.; Towell, R. S.; Tram, V. N.; Tserruya, I.; Tsuchimoto, Y.; Tuli, S. K.; Tydesjö, H.; Tyurin, N.; Vale, C.; Valle, H.; Van Hecke, H. W.; Velkovska, J.; Vertesi, R.; Vinogradov, A. A.; Virius, M.; Vrba, V.; Vznuzdaev, E.; Wagner, M.; Walker, D.; Wang, X. R.; Watanabe, Y.; Wessels, J.; White, S. N.; Willis, N.; Winter, D.; Woody, C. L.; Wysocki, M.; Xie, W.; Yamaguchi, Y. L.; Yanovich, A.; Yasin, Z.; Ying, J.; Yokkaichi, S.; Young, G. R.; Younus, I.; Yushmanov, I. E.; Zajc, W. A.; Zaudtke, O.; Zhang, C.; Zhou, S.; Zimányi, J.; Zolin, L.

In: Physical Review C - Nuclear Physics, Vol. 81, No. 3, 034911, 29.03.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at √sNN=200 GeV and implications for direct photon production

AU - Adare, A.

AU - Afanasiev, S.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Al-Bataineh, H.

AU - Alexander, J.

AU - Al-Jamel, A.

AU - Aoki, K.

AU - Aphecetche, L.

AU - Armendariz, R.

AU - Aronson, S. H.

AU - Asai, J.

AU - Atomssa, E. T.

AU - Averbeck, R.

AU - Awes, T. C.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Baksay, G.

AU - Baksay, L.

AU - Baldisseri, A.

AU - Barish, K. N.

AU - Barnes, P. D.

AU - Bassalleck, B.

AU - Bathe, S.

AU - Batsouli, S.

AU - Baublis, V.

AU - Bauer, F.

AU - Bazilevsky, A.

AU - Belikov, S.

AU - Bennett, R.

AU - Berdnikov, Y.

AU - Bickley, A. A.

AU - Bjorndal, M. T.

AU - Boissevain, J. G.

AU - Borel, H.

AU - Boyle, K.

AU - Brooks, M. L.

AU - Brown, D. S.

AU - Bucher, D.

AU - Buesching, H.

AU - Bumazhnov, V.

AU - Bunce, G.

AU - Burward-Hoy, J. M.

AU - Butsyk, S.

AU - Campbell, S.

AU - Chai, J. S.

AU - Chang, B. S.

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PY - 2010/3/29

Y1 - 2010/3/29

N2 - PHENIX has measured the e+e- pair continuum in √sNN=200□ GeV Au+Au and p+p collisions over a wide range of mass and transverse momenta. The e+e- yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate-mass region, between the masses of the φ and the J/ψ meson, the yield is consistent with expectations from correlated cc□ production, although other mechanisms are not ruled out. In the low-mass region, below the φ, the p+p inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of 4.7±0. 4stat±1.5syst±0.9model. At low mass (mee<0.3□ GeV/c2) and high pT (1+e- pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the p+p is exponential in pT, with inverse slope T=221±19stat±19syst□ MeV. Hydrodynamical models with initial temperatures ranging from Tinit□□300-600□ MeV at times of 0.6-0.15 fm/c after the collision are in qualitative agreement with the direct photon data in Au+Au. For low pT<1□ GeV/c the low-mass region shows a further significant enhancement that increases with centrality and has an inverse slope of T□□100□ MeV. Theoretical models underpredict the low-mass, low-pT enhancement.

AB - PHENIX has measured the e+e- pair continuum in √sNN=200□ GeV Au+Au and p+p collisions over a wide range of mass and transverse momenta. The e+e- yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate-mass region, between the masses of the φ and the J/ψ meson, the yield is consistent with expectations from correlated cc□ production, although other mechanisms are not ruled out. In the low-mass region, below the φ, the p+p inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of 4.7±0. 4stat±1.5syst±0.9model. At low mass (mee<0.3□ GeV/c2) and high pT (1+e- pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the p+p is exponential in pT, with inverse slope T=221±19stat±19syst□ MeV. Hydrodynamical models with initial temperatures ranging from Tinit□□300-600□ MeV at times of 0.6-0.15 fm/c after the collision are in qualitative agreement with the direct photon data in Au+Au. For low pT<1□ GeV/c the low-mass region shows a further significant enhancement that increases with centrality and has an inverse slope of T□□100□ MeV. Theoretical models underpredict the low-mass, low-pT enhancement.

UR - http://www.scopus.com/inward/record.url?scp=77950936872&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950936872&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.81.034911

DO - 10.1103/PhysRevC.81.034911

M3 - Article

VL - 81

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 3

M1 - 034911

ER -