Measurement of γγ → pp̄ production at Belle
Kuo, C.C.;
Abe, K.;
Adachi, I.;
Aihara, H.;
Asano, Y.;
Aulchenko, V.;
Aushev, T.;
Bahinipati, S.;
Bakich, A.M.;
Bay, A.
Bedny, I.;
Bitenc, U.;
Bizjak, I.;
Blyth, S.;
Bondar, A.;
Bozek, A.;
Bračko, M.;
Chang, M.-C.;
Chang, P.;
Chen, A.;
Chen, W.T.;
Cheon, B.G.;
Chistov, R.;
Choi, Y.;
Chuvikov, A.;
Cole, S.;
Dalseno, J.;
Danilov, M.;
Dash, M.;
Drutskoy, A.;
Eidelman, S.;
Enari, Y.;
Fratina, S.;
Gabyshev, N.;
Gershon, T.;
Go, A.;
Gokhroo, G.;
Gorišek, A.;
Haba, J.;
Hayasaka, K.;
Hayashii, H.;
Hazumi, M.;
Hokuue, T.;
Hoshi, Y.;
Hou, S.;
Hou, W.-S.;
Iijima, T.;
Imoto, A.;
Inami, K.;
Ishikawa, A.;
Itoh, R.;
Iwasaki, M.;
Kang, J.H.;
Kang, J.S.;
Kapusta, P.;
Kawai, H.;
Kawasaki, T.;
Khan, H.R.;
Kichimi, H.;
Kim, H.J.;
Kim, S.M.;
Krokovny, P.;
Kulasiri, R.;
Kumar, S.;
Kuzmin, A.;
Kwon, Y.-J.;
Leder, G.;
Lesiak, T.;
Lin, S.-W.;
Liventsev, D.;
MacNaughton, J.;
Majumder, G.;
Mandl, F.;
Matsumoto, T.;
Matyja, A.;
Mitaroff, W.;
Miyake, H.;
Mizuk, R.;
Moloney, G.R.;
Mori, T.;
Nagasaka, Y.;
Nakano, E.;
Nakao, M.;
Nakazawa, H.;
Natkaniec, Z.;
Nishida, S.;
Nitoh, O.;
Ogawa, S.;
Ohshima, T.;
Okuno, S.;
Olsen, S.L.;
Ostrowicz, W.;
Palka, H.;
Park, H.;
Peak, L.S.;
Pestotnik, R.;
Piilonen, L.E.;
Poluektov, A.;
Sagawa, H.
A high precision study of the process γγ→pp̄ has been performed using a data sample of 89 fb-1 collected with the Belle detector at the KEKB e+e- collider. The cross section of pp̄ production has been measured at two-photon center-of-mass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of |cosθ*|<0.6. Production of γγ→ηc→pp̄ is observed and the product of the two-photon width of the ηc and its branching ratio to pp̄ is determined. © 2005 Elsevier B.V. All rights reserved.
Reference
Record created on 2010-11-05, modified on 2017-05-12
