Elsevier

Physics Letters B

Volume 621, Issues 1–2, 11 August 2005, Pages 41-55
Physics Letters B

Measurement of γγpp¯ production at Belle

https://doi.org/10.1016/j.physletb.2005.06.036Get rights and content
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Abstract

A high precision study of the process γγpp¯ 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 pp¯ 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 γγηcpp¯ is observed and the product of the two-photon width of the ηc and its branching ratio to pp¯ is determined.

PACS

12.38.Qk
13.60.Rj
14.40.Gx

Cited by (0)

1

On leave from Nova Gorica Polytechnic, Nova Gorica, Slovenia.