High-statistics study of ηπ0 production in two-photon collisions

S. Uehara; Y. Watanabe; H. Nakazawa; I. Adachi; H. Aihara; K. Arinstein; V. Aulchenko; A. M. Bakich; K. Belous; A. Bondar; M. Bračko; T. E. Browder; P. Chang; A. Chen; B. G. Cheon; R. Chistov; Y. Choi; J. Crnkovic; J. Dalseno; M. Dash; S. Eidelman; D. Epifanov; N. Gabyshev; A. Garmash; P. Goldenzweig; H. Ha; K. Hayasaka; H. Hayashii; Y. Horii; Y. Hoshi; W. S. Hou; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; M. Iwasaki; Y. Iwasaki; J. H. Kang; H. Kawai; H. Kichimi; C. Kiesling; H. O. Kim; J. H. Kim; Y. I. Kim; Y. J. Kim; B. R. Ko; P. Krokovny; R. Kumar; A. Kuzmin; Y. J. Kwon; S. H. Kyeong; S. H. Lee; J. Li; A. Limosani; C. Liu; D. Liventsev; R. Louvot; A. Matyja; S. McOnie; K. Miyabayashi; H. Miyata; Y. Miyazaki; R. Mizuk; T. Mori; Y. Nagasaka; E. Nakano; M. Nakao; S. Nishida; K. Nishimura; O. Nitoh; S. Ogawa; T. Ohshima; S. Okuno; H. Palka; C. W. Park; H. Park; H. K. Park; A. Poluektov; H. Sahoo; Y. Sakai; O. Schneider; C. Schwanda; K. Senyo; M. E. Sevior; M. Shapkin; V. Shebalin; C. P. Shen; J. G. Shiu; B. Shwartz; J. B. Singh; A. Sokolov; S. Stanič; M. Starič; T. Sumiyoshi; G. N. Taylor; Y. Teramoto; Y. Unno; S. Uno; P. Urquijo; Y. Usov; G. Varner; K. Vervink; A. Vinokurova; C. H. Wang; P. Wang; R. Wedd; E. Won; Y. Yamashita; C. C. Zhang; Z. P. Zhang; V. Zhilich; V. Zhulanov; T. Zivko; A. Zupanc; O. Zyukova

doi:10.1103/PhysRevD.80.032001

High-statistics study of ηπ0 production in two-photon collisions

S. Uehara, Y. Watanabe, H. Nakazawa, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, K. Belous, A. Bondar, M. Bračko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Crnkovic, J. Dalseno, M. DashS. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, H. Kichimi, C. Kiesling, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Krokovny, R. Kumar, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, S. H. Lee, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, H. Palka, C. W. Park, H. Park, H. K. Park, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, P. Wang, R. Wedd, E. Won, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

Department of Physics

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Abstract

The differential cross section for the process γγ→η π0 has been measured in the kinematic range 0.84GeV<W<4.0GeV, θ*|<0.8, where W and θ* are the energy and π0 (or η) 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. Clear peaks due to the a0(980) and a2(1320) are visible. The differential cross sections are fitted in the energy region 0.9GeV<W<1.46GeV to obtain the parameters of the a0(980). Its mass, width and ΓγγB(ηπ0) are measured to be 982.3-0.7-4.7+0.6+3. 1MeV/c2, 75.6±1.6-10.0+17.4MeV and 128-2-43+3+502eV, respectively. The energy and angular dependences above 3.1 GeV are compared with those measured in the π0π0 channel. The integrated cross section over θ*|<0. 8 has a W-n dependence with n=10.5±1.2±0.5, which is slightly larger than that for π0π0. The differential cross sections show a sin-4θ* dependence similar to γγ→π0π0. The measured cross section ratio, σ(ηπ0)/σ(π0π0)=0. 48±0.05±0.04, is consistent with a QCD-based prediction.

Original language	English
Article number	032001
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.80.032001
Publication status	Published - 2009 Aug 7

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.80.032001

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Uehara, S., Watanabe, Y., Nakazawa, H., Adachi, I., Aihara, H., Arinstein, K., Aulchenko, V., Bakich, A. M., Belous, K., Bondar, A., Bračko, M., Browder, T. E., Chang, P., Chen, A., Cheon, B. G., Chistov, R., Choi, Y., Crnkovic, J., Dalseno, J., ... Zyukova, O. (2009). High-statistics study of ηπ0 production in two-photon collisions. Physical Review D - Particles, Fields, Gravitation and Cosmology, 80(3), [032001]. https://doi.org/10.1103/PhysRevD.80.032001

@article{b6b3295655f44f6aa375eedfd7f12a74,

title = "High-statistics study of ηπ0 production in two-photon collisions",

abstract = "The differential cross section for the process γγ→η π0 has been measured in the kinematic range 0.84GeV<W<4.0GeV, θ*|<0.8, where W and θ* are the energy and π0 (or η) 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. Clear peaks due to the a0(980) and a2(1320) are visible. The differential cross sections are fitted in the energy region 0.9GeV<W<1.46GeV to obtain the parameters of the a0(980). Its mass, width and ΓγγB(ηπ0) are measured to be 982.3-0.7-4.7+0.6+3. 1MeV/c2, 75.6±1.6-10.0+17.4MeV and 128-2-43+3+502eV, respectively. The energy and angular dependences above 3.1 GeV are compared with those measured in the π0π0 channel. The integrated cross section over θ*|<0. 8 has a W-n dependence with n=10.5±1.2±0.5, which is slightly larger than that for π0π0. The differential cross sections show a sin-4θ* dependence similar to γγ→π0π0. The measured cross section ratio, σ(ηπ0)/σ(π0π0)=0. 48±0.05±0.04, is consistent with a QCD-based prediction.",

author = "S. Uehara and Y. Watanabe and H. Nakazawa and I. Adachi and H. Aihara and K. Arinstein and V. Aulchenko and Bakich, {A. M.} and K. Belous and A. Bondar and M. Bra{\v c}ko and Browder, {T. E.} and P. Chang and A. Chen and Cheon, {B. G.} and R. Chistov and Y. Choi and J. Crnkovic and J. Dalseno and M. Dash and S. Eidelman and D. Epifanov and N. Gabyshev and A. Garmash and P. Goldenzweig and H. Ha and K. Hayasaka and H. Hayashii and Y. Horii and Y. Hoshi and Hou, {W. S.} and Hyun, {H. J.} and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and M. Iwasaki and Y. Iwasaki and Kang, {J. H.} and H. Kawai and H. Kichimi and C. Kiesling and Kim, {H. O.} and Kim, {J. H.} and Kim, {Y. I.} and Kim, {Y. J.} and Ko, {B. R.} and P. Krokovny and R. Kumar and A. Kuzmin and Kwon, {Y. J.} and Kyeong, {S. H.} and Lee, {S. H.} and J. Li and A. Limosani and C. Liu and D. Liventsev and R. Louvot and A. Matyja and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and R. Mizuk and T. Mori and Y. Nagasaka and E. Nakano and M. Nakao and S. Nishida and K. Nishimura and O. Nitoh and S. Ogawa and T. Ohshima and S. Okuno and H. Palka and Park, {C. W.} and H. Park and Park, {H. K.} and A. Poluektov and H. Sahoo and Y. Sakai and O. Schneider and C. Schwanda and K. Senyo and Sevior, {M. E.} and M. Shapkin and V. Shebalin and Shen, {C. P.} and Shiu, {J. G.} and B. Shwartz and Singh, {J. B.} and A. Sokolov and S. Stani{\v c} and M. Stari{\v c} and T. Sumiyoshi and Taylor, {G. N.} and Y. Teramoto and Y. Unno and S. Uno and P. Urquijo and Y. Usov and G. Varner and K. Vervink and A. Vinokurova and Wang, {C. H.} and P. Wang and R. Wedd and E. Won 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",

year = "2009",

month = aug,

day = "7",

doi = "10.1103/PhysRevD.80.032001",

language = "English",

volume = "80",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "3",

}

Uehara, S, Watanabe, Y, Nakazawa, H, Adachi, I, Aihara, H, Arinstein, K, Aulchenko, V, Bakich, AM, Belous, K, Bondar, A, Bračko, M, Browder, TE, Chang, P, Chen, A, Cheon, BG, Chistov, R, Choi, Y, Crnkovic, J, Dalseno, J, Dash, M, Eidelman, S, Epifanov, D, Gabyshev, N, Garmash, A, Goldenzweig, P, Ha, H, Hayasaka, K, Hayashii, H, Horii, Y, Hoshi, Y, Hou, WS, Hyun, HJ, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwasaki, M, Iwasaki, Y, Kang, JH, Kawai, H, Kichimi, H, Kiesling, C, Kim, HO, Kim, JH, Kim, YI, Kim, YJ, Ko, BR, Krokovny, P, Kumar, R, Kuzmin, A, Kwon, YJ, Kyeong, SH, Lee, SH, Li, J, Limosani, A, Liu, C, Liventsev, D, Louvot, R, Matyja, A, McOnie, S, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mizuk, R, Mori, T, Nagasaka, Y, Nakano, E, Nakao, M, Nishida, S, Nishimura, K, Nitoh, O, Ogawa, S, Ohshima, T, Okuno, S, Palka, H, Park, CW, Park, H, Park, HK, Poluektov, A, Sahoo, H, Sakai, Y, Schneider, O, Schwanda, C, Senyo, K, Sevior, ME, Shapkin, M, Shebalin, V, Shen, CP, Shiu, JG, Shwartz, B, Singh, JB, Sokolov, A, Stanič, S, Starič, M, Sumiyoshi, T, Taylor, GN, Teramoto, Y, Unno, Y, Uno, S, Urquijo, P, Usov, Y, Varner, G, Vervink, K, Vinokurova, A, Wang, CH, Wang, P, Wedd, R, Won, E, Yamashita, Y, Zhang, CC, Zhang, ZP, Zhilich, V, Zhulanov, V, Zivko, T, Zupanc, A & Zyukova, O 2009, 'High-statistics study of ηπ0 production in two-photon collisions', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 80, no. 3, 032001. https://doi.org/10.1103/PhysRevD.80.032001

TY - JOUR

T1 - High-statistics study of ηπ0 production in two-photon collisions

AU - Uehara, S.

AU - Watanabe, Y.

AU - Nakazawa, H.

AU - Adachi, I.

AU - Aihara, H.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Bakich, A. M.

AU - Belous, K.

AU - Bondar, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chang, P.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, Y.

AU - Crnkovic, J.

AU - Dalseno, J.

AU - Dash, M.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Goldenzweig, P.

AU - Ha, H.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Kang, J. H.

AU - Kawai, H.

AU - Kichimi, H.

AU - Kiesling, C.

AU - Kim, H. O.

AU - Kim, J. H.

AU - Kim, Y. I.

AU - Kim, Y. J.

AU - Ko, B. R.

AU - Krokovny, P.

AU - Kumar, R.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Kyeong, S. H.

AU - Lee, S. H.

AU - Li, J.

AU - Limosani, A.

AU - Liu, C.

AU - Liventsev, D.

AU - Louvot, R.

AU - Matyja, A.

AU - McOnie, S.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Mori, T.

AU - Nagasaka, Y.

AU - Nakano, E.

AU - Nakao, M.

AU - Nishida, S.

AU - Nishimura, K.

AU - Nitoh, O.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Palka, H.

AU - Park, C. W.

AU - Park, H.

AU - Park, H. K.

AU - Poluektov, A.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Schwanda, C.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Singh, J. B.

AU - Sokolov, A.

AU - Stanič, S.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Usov, Y.

AU - Varner, G.

AU - Vervink, K.

AU - Vinokurova, A.

AU - Wang, C. H.

AU - Wang, P.

AU - Wedd, R.

AU - Won, E.

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 - 2009/8/7

Y1 - 2009/8/7

N2 - The differential cross section for the process γγ→η π0 has been measured in the kinematic range 0.84GeV<W<4.0GeV, θ*|<0.8, where W and θ* are the energy and π0 (or η) 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. Clear peaks due to the a0(980) and a2(1320) are visible. The differential cross sections are fitted in the energy region 0.9GeV<W<1.46GeV to obtain the parameters of the a0(980). Its mass, width and ΓγγB(ηπ0) are measured to be 982.3-0.7-4.7+0.6+3. 1MeV/c2, 75.6±1.6-10.0+17.4MeV and 128-2-43+3+502eV, respectively. The energy and angular dependences above 3.1 GeV are compared with those measured in the π0π0 channel. The integrated cross section over θ*|<0. 8 has a W-n dependence with n=10.5±1.2±0.5, which is slightly larger than that for π0π0. The differential cross sections show a sin-4θ* dependence similar to γγ→π0π0. The measured cross section ratio, σ(ηπ0)/σ(π0π0)=0. 48±0.05±0.04, is consistent with a QCD-based prediction.

AB - The differential cross section for the process γγ→η π0 has been measured in the kinematic range 0.84GeV<W<4.0GeV, θ*|<0.8, where W and θ* are the energy and π0 (or η) 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. Clear peaks due to the a0(980) and a2(1320) are visible. The differential cross sections are fitted in the energy region 0.9GeV<W<1.46GeV to obtain the parameters of the a0(980). Its mass, width and ΓγγB(ηπ0) are measured to be 982.3-0.7-4.7+0.6+3. 1MeV/c2, 75.6±1.6-10.0+17.4MeV and 128-2-43+3+502eV, respectively. The energy and angular dependences above 3.1 GeV are compared with those measured in the π0π0 channel. The integrated cross section over θ*|<0. 8 has a W-n dependence with n=10.5±1.2±0.5, which is slightly larger than that for π0π0. The differential cross sections show a sin-4θ* dependence similar to γγ→π0π0. The measured cross section ratio, σ(ηπ0)/σ(π0π0)=0. 48±0.05±0.04, is consistent with a QCD-based prediction.

UR - http://www.scopus.com/inward/record.url?scp=69549095608&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69549095608&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.80.032001

DO - 10.1103/PhysRevD.80.032001

M3 - Article

AN - SCOPUS:69549095608

SN - 1550-7998

VL - 80

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 3

M1 - 032001

ER -

High-statistics study of ηπ0 production in two-photon collisions

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