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  • Letter
  • Open Access

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

Izabela Babiarz1,*, Roman Pasechnik2,†, Wolfgang Schäfer1,‡, and Antoni Szczurek1,3,§

  • 1Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, PL-31-342 Kraków, Poland
  • 2Department of Physics, Lund University, SE-223 62 Lund, Sweden
  • 3College of Mathematics and Natural Sciences, University of Rzeszów, ul. Pigonia 1, PL-35-310 Rzeszów, Poland

  • *izabela.babiarz@ifj.edu.pl
  • †roman.pasechnik@hep.lu.se
  • ‡wolfgang.schafer@ifj.edu.pl
  • §antoni.szczurek@ifj.edu.pl
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Phys. Rev. D 107, L071503 – Published 18 April, 2023

DOI: https://doi.org/10.1103/PhysRevD.107.L071503

Abstract

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.

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Phys. Rev. D 107, L071503– Published 18 April, 2023
  • Received 22 March 2023
  • Accepted 30 March 2023
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