Probing the structure of χc1 (3872) with photon transition form factors

Summary, in English

We propose studying the structure of the χc1(3872) axial vector meson through its γL∗γ→χc1(3872) transition form factor. We derive a light-front wave function representation of the form factor for the lowest cc¯ Fock state. We found that the reduced width of the state is well within the current experimental bound recently published by the Belle Collaboration. This strongly suggests a crucial role of the cc¯ Fock-state in the photon-induced production. Our results for the Q2 dependence can be tested by future single-tagged e+e- experiments, giving further insight into the short-distance structure of this meson.

• Author: Izabela Babiarz; Roman Pasechnik; Wolfgang Schäfer; Antoni Szczurek
• Department/s: Particle and nuclear physics
• Publishing year: 2023-04-01
• Language: English
• Publication/Series: Physical Review D
• Volume: 107
• Issue: 7
• Links: http://dx.doi.org/10.1103/PhysRevD.107.L071503
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 2470-0010