First measurement of the Q2 distribution of X(3915) single-tag two-photon production

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2023-07-11, 2023-07-11

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American Physical Society


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)→J/ψω. The covered Q2 region is from 1.5 (GeV/c)2 to 10.0 (GeV/c)2. We observe 7.9±3.1(stat)±1.5(syst) events, where we expect 4.1±0.7 events based on the Q2=0 result from the no-tag two-photon process, extrapolated to higher Q2 region using the cc¯ 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.



Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, QED RADIATIVE-CORRECTIONS, UNIVERSAL MONTE-CARLO, IDENTIFICATION, PHOTOS, 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences