Measurement of γγ → pp̄ production at Belle

CC Kuo; K Abe; I Adachi; H Aihara; Y Asano; V Aulchenko; T Aushev; S Bahinipati; AM Bakich; A Bay; I Bedny; U Bitenc; I Bizjak; S Blyth; A Bondar; A Bozek; M Bracko; MC Chang; P Chang; A Chen; WT Chen; BG Cheon; R Chistov; Y Choi; A Chuvikov; S Cole; J Dalseno; M Danilov; M Dash; A Drutskoy; S Eidelman; Y Enari; S Fratina; N Gabyshev; T Gershon; A Go; G Gokhroo; A Gorišek; J Haba; K Hayasaka; H Hayashii; M Hazumi; T Hokuue; Y Hoshi; S Hou; WS Hou; T Iijima; A Imoto; K Inami; A Ishikawa; R Itoh; M Iwasaki; JH Kang; JS Kang; P Kapusta; H Kawai; T Kawasaki; HR Khan; H Kichimi; HJ Kim; SM Kim; P Krokovny; R Kulasiri; S Kumar; A Kuzmin; YJ Kwon; G Leder; T Lesiak; SW Lin; D Liventsev; J MacNaughton; G Majumder; F Mand; T Matsumoto; A Matyja; W Mitaroff; H Miyake; R Mizuk; GR Moloney; T Mori; Y Nagasaka; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; S Ogawa; T Ohshima; S Okuno; SL Olsen; W Ostrowicz; H Palka; H Park; LS Peak; R Pestotnik; LE Piilonen; A Poluektov; H Sagawa; Y Sakai

Journal article

Measurement of γγ → pp̄ production at Belle

CC Kuo, K Abe, I Adachi, H Aihara, Y Asano, V Aulchenko, T Aushev, S Bahinipati, AM Bakich, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bracko, MC Chang, P Chang, A Chen Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 2005

DOI: 10.1016/j.physletb.2005.06.036

Abstract

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.