Publication at Faculty of Mathematics and Physics |
2023
Abstract
We report the first measurement of the Q2 distribution of X(3915) produced by single-tag two-photon interactions. The decay mode used is X(3915) & RARR; J/& psi;& omega;.
The covered Q2 region is from 1.5 (GeV/c)2 to 10.0 (GeV/c)2. We observe 7.9 1 3.1(stat) 1 1.5(syst) events, where we expect 4.1 10.7 events based on the Q2 = 0 result from the no-tag two-photon process, extrapolated to higher Q2 region using the cc over bar model of Schuler, Berends, and van Gulik.
The shape of the distribution is also consistent with this model; we note that statistical uncertainties are large.