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Measurement of eta eta production in two-photon collisions

Authors
Uehara, S.Watanabe, Y.Nakazawa, H.Adachi, I.Aihara, H.Arinstein, K.Aushev, T.Bakich, A. M.Balagura, V.Barberio, E.Bay, A.Belous, K.Bischofberger, M.Bondar, A.Bonvicini, G.Bozek, A.Bracko, M.Browder, T. E.Chang, P.Chao, Y.Chen, A.Chen, P.Cheon, B. G.Cho, I. -S.Choi, Y.Dalseno, J.Dolezal, Z.Drutskoy, A.Eidelman, S.Goldenzweig, P.Ha, H.Haba, J.Hayasaka, K.Hayashii, H.Horii, Y.Hoshi, Y.Hou, W. -S.Hsiung, Y. B.Hyun, H. J.Itoh, R.Iwabuchi, M.Iwasaki, M.Iwasaki, Y.Julius, T.Kah, D. H.Kang, J. H.Kapusta, P.Kawai, H.Kawasaki, T.Kichimi, H.Kim, H. J.Kim, H. O.Kim, J. H.Kim, M. J.Ko, B. R.Kodys, P.Korpar, S.Krizan, P.Krokovny, P.Kwon, Y. -J.Kyeong, S. -H.Lange, J. S.Lee, M. J.Lee, S. -H.Liu, Y.Liventsev, D.Louvot, R.Matyja, A.McOnie, S.Miyabayashi, K.Miyata, H.Miyazaki, Y.Mizuk, R.Mohanty, G. B.Mori, T.Nakano, E.Nakao, M.Natkaniec, Z.Nishida, S.Nishimura, K.Nitoh, O.Ogawa, S.Ohshima, T.Okuno, S.Olsen, S. L.Park, C. W.Park, H.Park, H. K.Pestotnik, R.Petric, M.Piilonen, L. E.Poluektov, A.Ryu, S.Sahoo, H.Sakai, Y.Schneider, O.Schwanda, C.Senyo, K.Sevior, M. E.Shapkin, M.Shen, C. P.Shiu, J. -G.Shwartz, B.Simon, F.Smerkol, P.Sokolov, A.Solovieva, E.Stanic, S.Staric, M.Sumiyoshi, T.Teramoto, Y.Uglov, T.Unno, Y.Uno, S.Varner, G.Vervink, K.Wang, C. H.Wang, P.Wang, X. L.Wedd, R.Won, E.Yamashita, Y.Zhang, Z. P.Zhilich, V.Zhou, P.Zivko, T.Zupanc, A.
Issue Date
30-Dec-2010
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.82, no.11
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
82
Number
11
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/115090
DOI
10.1103/PhysRevD.82.114031
ISSN
1550-7998
Abstract
We report the first measurement of the differential cross section for the process gamma gamma -> eta eta in the kinematic range above the eta eta threshold, 1.096 GeV < W < 3.8 GeV over nearly the entire solid angle range, vertical bar cos theta*vertical bar <= 0.9 or <= 1.0 depending on W, where W and theta* are the energy and eta scattering angle, respectively, in the gamma gamma center-of-mass system. The results are based on a 393 fb(-1) data sample collected with the Belle detector at the KEKB e(+)e(-) collider. In the W range 1.1-2.0 GeV/c(2) we perform an analysis of resonance amplitudes for various partial waves, and at higher energy we compare the energy and the angular dependences of the cross section with predictions of theoretical models and extract contributions of the chi(cJ) charmonia.
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