A study of γ γ → KS0 KS0 production at energies from 2.4 to 4.0 GeV at Belle

WT Chen; K Abe; K Abe; I Adachi; H Aihara; D Anipko; V Aulchenko; AM Bakich; E Barberio; A Bay; I Bedny; U Bitenc; I Bizjak; S Blyth; A Bondar; A Bozek; M Bračko; TE Browder; MC Chang; P Chang; Y Chao; A Chen; BG Cheon; R Chistov; Y Choi; YK Choi; J Dalseno; M Dash; A Drutskoy; S Eidelman; D Epifanov; A Go; H Ha; M Hazumi; D Heffernan; T Higuchi; T Hokuue; Y Hoshi; WS Hou; T Iijima; A Imoto; K Inami; A Ishikawa; R Itoh; M Iwasaki; H Kaji; JH Kang; P Kapusta; N Katayama; H Kawai; T Kawasaki; H Kichimi; HO Kim; YJ Kim; S Korpar; P Križan; P Krokovny; R Kulasiri; R Kumar; CC Kuo; A Kuzmin; YJ Kwon; SE Lee; T Lesiak; SW Lin; D Liventsev; G Majumder; F Mandl; T Matsumoto; A Matyja; S McOnie; T Medvedeva; H Miyata; Y Miyazaki; R Mizuk; GR Moloney; T Mori; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; T Nozaki; S Ogawa; T Ohshima; S Okuno; SL Olsen; Y Onuki; H Ozaki; P Pakhlov; G Pakhlova; H Palka; CW Park; R Pestotnik; LE Piilonen; H Sahoo; Y Sakai; N Satoyama; T Schietinger

Journal article

A study of γ γ → KS0 KS0 production at energies from 2.4 to 4.0 GeV at Belle

WT Chen, K Abe, K Abe, I Adachi, H Aihara, D Anipko, V Aulchenko, AM Bakich, E Barberio, A Bay, I Bedny, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bračko, TE Browder, MC Chang, P Chang Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 2007

DOI: 10.1016/j.physletb.2007.05.059

Abstract

KS0 KS0 production in two-photon collisions has been studied using a 397.6 fb-1 data sample collected with the Belle detector at the KEKB e+ e- collider. For the first time the cross sections are measured in the two-photon center-of-mass energy range between 2.4 GeV and 4.0 GeV and angular range | cos θ* | < 0.6. Combining the results with measurements of γ γ → K+ K- from Belle, we observe that the cross section ratio σ (KS0 KS0) / σ (K+ K-) decreases from ∼0.13 to ∼0.01 with increasing energy. Signals for the χc 0 and χc 2 charmonium states are also observed. © 2007 Elsevier B.V. All rights reserved.