High-statistics study of neutral-pion pair production in two-photon collisions

S. Uehara, Y. Watanabe, H. Nakazawa, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, K. Belous, V. Bhardwaj, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, A. Chen, B. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi & 84 others M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, Y. Iwasaki, N. J. Joshi, D. H. Kah, N. Katayama, T. Kawasaki, H. Kichimi, H. O. Kim, Y. I. Kim, Y. J. Kim, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Youngjoon Kwon, M. J. Lee, T. Lesiak, Y. Liu, D. Liventsev, R. Louvot, S. McOnie, H. Miyata, R. Mizuk, Y. Nagasaka, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, K. Senyo, M. Shapkin, J. G. Shiu, B. Shwartz, M. Starič, T. Sumiyoshi, M. Tanaka, Y. Teramoto, I. Tikhomirov, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The differential cross sections for the process γγ→π 0π0 have been measured in the kinematic range 0.6GeV<W<4.1GeV, |cos θ*|<0.8 in energy and pion scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 223fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. The differential cross sections are fitted in the energy region 1.7GeV<W<2. 5GeV to confirm the two-photon production of two pions in the G wave. In the higher-energy region, we observe production of the χc0 charmonium state and obtain the product of its two-photon decay width and branching fraction to π0π0. We also compare the observed angular dependence and ratios of cross sections for neutral-pion and charged-pion pair production to QCD models. The energy and angular dependence above 3.1 GeV are compatible with those measured in the π+π- channel, and in addition we find that the cross section ratio, σ(π0π0)/σ(π+π-), is 0.32±0.03±0.05 on average in the 3.1-4.1 GeV region.

Original languageEnglish
Article number052009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume79
Issue number5
DOIs
Publication statusPublished - 2009 Mar 2

Fingerprint

pair production
pions
statistics
collisions
cross sections
photons
energy
center of mass
kinematics
quantum chromodynamics
detectors
decay
products
scattering

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Uehara, S., Watanabe, Y., Nakazawa, H., Aihara, H., Arinstein, K., Aulchenko, V., ... Zyukova, O. (2009). High-statistics study of neutral-pion pair production in two-photon collisions. Physical Review D - Particles, Fields, Gravitation and Cosmology, 79(5), [052009]. https://doi.org/10.1103/PhysRevD.79.052009
Uehara, S. ; Watanabe, Y. ; Nakazawa, H. ; Aihara, H. ; Arinstein, K. ; Aulchenko, V. ; Bakich, A. M. ; Barberio, E. ; Belous, K. ; Bhardwaj, V. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Chen, A. ; Cheon, B. G. ; Chistov, R. ; Cho, I. S. ; Choi, S. K. ; Choi, Y. ; Dash, M. ; Eidelman, S. ; Epifanov, D. ; Gabyshev, N. ; Goldenzweig, P. ; Ha, H. ; Haba, J. ; Han, B. Y. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Hoshi, Y. ; Hou, W. S. ; Hyun, H. J. ; Inami, K. ; Ishikawa, A. ; Iwasaki, Y. ; Joshi, N. J. ; Kah, D. H. ; Katayama, N. ; Kawasaki, T. ; Kichimi, H. ; Kim, H. O. ; Kim, Y. I. ; Kim, Y. J. ; Korpar, S. ; Križan, P. ; Krokovny, P. ; Kuzmin, A. ; Kwon, Youngjoon ; Lee, M. J. ; Lesiak, T. ; Liu, Y. ; Liventsev, D. ; Louvot, R. ; McOnie, S. ; Miyata, H. ; Mizuk, R. ; Nagasaka, Y. ; Nakao, M. ; Nishida, S. ; Nishimura, K. ; Nitoh, O. ; Ogawa, S. ; Ohshima, T. ; Okuno, S. ; Pakhlov, P. ; Pakhlova, G. ; Park, C. W. ; Park, H. ; Park, H. K. ; Pestotnik, R. ; Piilonen, L. E. ; Poluektov, A. ; Sahoo, H. ; Sakai, Y. ; Schneider, O. ; Senyo, K. ; Shapkin, M. ; Shiu, J. G. ; Shwartz, B. ; Starič, M. ; Sumiyoshi, T. ; Tanaka, M. ; Teramoto, Y. ; Tikhomirov, I. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Usov, Y. ; Varner, G. ; Vervink, K. ; Vinokurova, A. ; Wang, C. H. ; Wang, P. ; Yabsley, B. D. ; Yamashita, Y. ; Zhang, C. C. ; Zhang, Z. P. ; Zhilich, V. ; Zhulanov, V. ; Zivko, T. ; Zupanc, A. ; Zyukova, O. / High-statistics study of neutral-pion pair production in two-photon collisions. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2009 ; Vol. 79, No. 5.
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abstract = "The differential cross sections for the process γγ→π 0π0 have been measured in the kinematic range 0.6GeV<W<4.1GeV, |cos θ*|<0.8 in energy and pion scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 223fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. The differential cross sections are fitted in the energy region 1.7GeV<W<2. 5GeV to confirm the two-photon production of two pions in the G wave. In the higher-energy region, we observe production of the χc0 charmonium state and obtain the product of its two-photon decay width and branching fraction to π0π0. We also compare the observed angular dependence and ratios of cross sections for neutral-pion and charged-pion pair production to QCD models. The energy and angular dependence above 3.1 GeV are compatible with those measured in the π+π- channel, and in addition we find that the cross section ratio, σ(π0π0)/σ(π+π-), is 0.32±0.03±0.05 on average in the 3.1-4.1 GeV region.",
author = "S. Uehara and Y. Watanabe and H. Nakazawa and H. Aihara and K. Arinstein and V. Aulchenko and Bakich, {A. M.} and E. Barberio and K. Belous and V. Bhardwaj and A. Bondar and A. Bozek and M. Bračko and Browder, {T. E.} and A. Chen and Cheon, {B. G.} and R. Chistov and Cho, {I. S.} and Choi, {S. K.} and Y. Choi and M. Dash and S. Eidelman and D. Epifanov and N. Gabyshev and P. Goldenzweig and H. Ha and J. Haba and Han, {B. Y.} and K. Hayasaka and H. Hayashii and M. Hazumi and Y. Hoshi and Hou, {W. S.} and Hyun, {H. J.} and K. Inami and A. Ishikawa and Y. Iwasaki and Joshi, {N. J.} and Kah, {D. H.} and N. Katayama and T. Kawasaki and H. Kichimi and Kim, {H. O.} and Kim, {Y. I.} and Kim, {Y. J.} and S. Korpar and P. Križan and P. Krokovny and A. Kuzmin and Youngjoon Kwon and Lee, {M. J.} and T. Lesiak and Y. Liu and D. Liventsev and R. Louvot and S. McOnie and H. Miyata and R. Mizuk and Y. Nagasaka and M. Nakao and S. Nishida and K. Nishimura and O. Nitoh and S. Ogawa and T. Ohshima and S. Okuno and P. Pakhlov and G. Pakhlova and Park, {C. W.} and H. Park and Park, {H. K.} and R. Pestotnik and Piilonen, {L. E.} and A. Poluektov and H. Sahoo and Y. Sakai and O. Schneider and K. Senyo and M. Shapkin and Shiu, {J. G.} and B. Shwartz and M. Starič and T. Sumiyoshi and M. Tanaka and Y. Teramoto and I. Tikhomirov and T. Uglov and Y. Unno and S. Uno and Y. Usov and G. Varner and K. Vervink and A. Vinokurova and Wang, {C. H.} and P. Wang and Yabsley, {B. D.} and Y. Yamashita and Zhang, {C. C.} and Zhang, {Z. P.} and V. Zhilich and V. Zhulanov and T. Zivko and A. Zupanc and O. Zyukova",
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Uehara, S, Watanabe, Y, Nakazawa, H, Aihara, H, Arinstein, K, Aulchenko, V, Bakich, AM, Barberio, E, Belous, K, Bhardwaj, V, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chen, A, Cheon, BG, Chistov, R, Cho, IS, Choi, SK, Choi, Y, Dash, M, Eidelman, S, Epifanov, D, Gabyshev, N, Goldenzweig, P, Ha, H, Haba, J, Han, BY, Hayasaka, K, Hayashii, H, Hazumi, M, Hoshi, Y, Hou, WS, Hyun, HJ, Inami, K, Ishikawa, A, Iwasaki, Y, Joshi, NJ, Kah, DH, Katayama, N, Kawasaki, T, Kichimi, H, Kim, HO, Kim, YI, Kim, YJ, Korpar, S, Križan, P, Krokovny, P, Kuzmin, A, Kwon, Y, Lee, MJ, Lesiak, T, Liu, Y, Liventsev, D, Louvot, R, McOnie, S, Miyata, H, Mizuk, R, Nagasaka, Y, Nakao, M, Nishida, S, Nishimura, K, Nitoh, O, Ogawa, S, Ohshima, T, Okuno, S, Pakhlov, P, Pakhlova, G, Park, CW, Park, H, Park, HK, Pestotnik, R, Piilonen, LE, Poluektov, A, Sahoo, H, Sakai, Y, Schneider, O, Senyo, K, Shapkin, M, Shiu, JG, Shwartz, B, Starič, M, Sumiyoshi, T, Tanaka, M, Teramoto, Y, Tikhomirov, I, Uglov, T, Unno, Y, Uno, S, Usov, Y, Varner, G, Vervink, K, Vinokurova, A, Wang, CH, Wang, P, Yabsley, BD, Yamashita, Y, Zhang, CC, Zhang, ZP, Zhilich, V, Zhulanov, V, Zivko, T, Zupanc, A & Zyukova, O 2009, 'High-statistics study of neutral-pion pair production in two-photon collisions', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 79, no. 5, 052009. https://doi.org/10.1103/PhysRevD.79.052009

High-statistics study of neutral-pion pair production in two-photon collisions. / Uehara, S.; Watanabe, Y.; Nakazawa, H.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Bakich, A. M.; Barberio, E.; Belous, K.; Bhardwaj, V.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Chen, A.; Cheon, B. G.; Chistov, R.; Cho, I. S.; Choi, S. K.; Choi, Y.; Dash, M.; Eidelman, S.; Epifanov, D.; Gabyshev, N.; Goldenzweig, P.; Ha, H.; Haba, J.; Han, B. Y.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Hoshi, Y.; Hou, W. S.; Hyun, H. J.; Inami, K.; Ishikawa, A.; Iwasaki, Y.; Joshi, N. J.; Kah, D. H.; Katayama, N.; Kawasaki, T.; Kichimi, H.; Kim, H. O.; Kim, Y. I.; Kim, Y. J.; Korpar, S.; Križan, P.; Krokovny, P.; Kuzmin, A.; Kwon, Youngjoon; Lee, M. J.; Lesiak, T.; Liu, Y.; Liventsev, D.; Louvot, R.; McOnie, S.; Miyata, H.; Mizuk, R.; Nagasaka, Y.; Nakao, M.; Nishida, S.; Nishimura, K.; Nitoh, O.; Ogawa, S.; Ohshima, T.; Okuno, S.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H.; Park, H. K.; Pestotnik, R.; Piilonen, L. E.; Poluektov, A.; Sahoo, H.; Sakai, Y.; Schneider, O.; Senyo, K.; Shapkin, M.; Shiu, J. G.; Shwartz, B.; Starič, M.; Sumiyoshi, T.; Tanaka, M.; Teramoto, Y.; Tikhomirov, I.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Varner, G.; Vervink, K.; Vinokurova, A.; Wang, C. H.; Wang, P.; Yabsley, B. D.; Yamashita, Y.; Zhang, C. C.; Zhang, Z. P.; Zhilich, V.; Zhulanov, V.; Zivko, T.; Zupanc, A.; Zyukova, O.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 79, No. 5, 052009, 02.03.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High-statistics study of neutral-pion pair production in two-photon collisions

AU - Uehara, S.

AU - Watanabe, Y.

AU - Nakazawa, H.

AU - Aihara, H.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Bakich, A. M.

AU - Barberio, E.

AU - Belous, K.

AU - Bhardwaj, V.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Cho, I. S.

AU - Choi, S. K.

AU - Choi, Y.

AU - Dash, M.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Gabyshev, N.

AU - Goldenzweig, P.

AU - Ha, H.

AU - Haba, J.

AU - Han, B. Y.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Inami, K.

AU - Ishikawa, A.

AU - Iwasaki, Y.

AU - Joshi, N. J.

AU - Kah, D. H.

AU - Katayama, N.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kim, H. O.

AU - Kim, Y. I.

AU - Kim, Y. J.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kuzmin, A.

AU - Kwon, Youngjoon

AU - Lee, M. J.

AU - Lesiak, T.

AU - Liu, Y.

AU - Liventsev, D.

AU - Louvot, R.

AU - McOnie, S.

AU - Miyata, H.

AU - Mizuk, R.

AU - Nagasaka, Y.

AU - Nakao, M.

AU - Nishida, S.

AU - Nishimura, K.

AU - Nitoh, O.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H.

AU - Park, H. K.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Poluektov, A.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Senyo, K.

AU - Shapkin, M.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Tanaka, M.

AU - Teramoto, Y.

AU - Tikhomirov, I.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Usov, Y.

AU - Varner, G.

AU - Vervink, K.

AU - Vinokurova, A.

AU - Wang, C. H.

AU - Wang, P.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Zhang, C. C.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhulanov, V.

AU - Zivko, T.

AU - Zupanc, A.

AU - Zyukova, O.

PY - 2009/3/2

Y1 - 2009/3/2

N2 - The differential cross sections for the process γγ→π 0π0 have been measured in the kinematic range 0.6GeV<W<4.1GeV, |cos θ*|<0.8 in energy and pion scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 223fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. The differential cross sections are fitted in the energy region 1.7GeV<W<2. 5GeV to confirm the two-photon production of two pions in the G wave. In the higher-energy region, we observe production of the χc0 charmonium state and obtain the product of its two-photon decay width and branching fraction to π0π0. We also compare the observed angular dependence and ratios of cross sections for neutral-pion and charged-pion pair production to QCD models. The energy and angular dependence above 3.1 GeV are compatible with those measured in the π+π- channel, and in addition we find that the cross section ratio, σ(π0π0)/σ(π+π-), is 0.32±0.03±0.05 on average in the 3.1-4.1 GeV region.

AB - The differential cross sections for the process γγ→π 0π0 have been measured in the kinematic range 0.6GeV<W<4.1GeV, |cos θ*|<0.8 in energy and pion scattering angle, respectively, in the γγ center-of-mass system. The results are based on a 223fb-1 data sample collected with the Belle detector at the KEKB e+e- collider. The differential cross sections are fitted in the energy region 1.7GeV<W<2. 5GeV to confirm the two-photon production of two pions in the G wave. In the higher-energy region, we observe production of the χc0 charmonium state and obtain the product of its two-photon decay width and branching fraction to π0π0. We also compare the observed angular dependence and ratios of cross sections for neutral-pion and charged-pion pair production to QCD models. The energy and angular dependence above 3.1 GeV are compatible with those measured in the π+π- channel, and in addition we find that the cross section ratio, σ(π0π0)/σ(π+π-), is 0.32±0.03±0.05 on average in the 3.1-4.1 GeV region.

UR - http://www.scopus.com/inward/record.url?scp=64849109412&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=64849109412&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.79.052009

DO - 10.1103/PhysRevD.79.052009

M3 - Article

VL - 79

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 5

M1 - 052009

ER -