Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5493626 | Nuclear and Particle Physics Proceedings | 2017 | 4 Pages |
Abstract
Many models to describe the nature of heavy quarkonia have been proposed and one of the ways to test them is to analyze charmonium states produced in two-photon collisions through measuring their two-photon decay width(Îγγ) and the angular distribution since they provide information on properties and internal structure of charmonium states. In this analysis, we use the decay channel γγâXâJ/Ïγ, J/Ïââ+ââ(â=eorμ) based on the 980.4 fbâ1 Belle data sample, where X is a charmonium state. Previously, Belle and CLEO collaborations have reported measurements of γγâÏc2(1P)âJ/Ïγ, J/Ïââ+ââ using 32.6 fbâ1 and 14.4 fbâ1 samples, respectively. By analyzing an about 30 times larger data sample, we can make a more precise measurement of Ïc2(1P) and other rare charmonium states including a new charmonium(-like) state. In this paper, we discuss the proposal and method of the analysis and show the result of the feasibility study using Monte Carlo (MC) samples of γγâÏc2(1P)âJ/Ïγ.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Y. Seino, H. Miyata, Belle collaboration Belle collaboration,