Probing the structure of ${\chi }_{c1}(3872)$ with photon transition form factors

Abstract

We propose to study the structure of the enigmatic ${\chi }_{c1}(3872)$ axial vector meson through its ${\gamma }_L^{\ast }\gamma \to {\chi }_{c1}(3872)$ transition form factor. We derive a light-front wave function representation of the form factor for the lowest $c\bar{c}$ 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 $c\bar{c}$ Fock-state in the photon-induced production. Our results for the $Q^2$ dependence can be tested by future single tagged $e^{+}{e}^{-}$ experiments, giving further insights into the short-distance structure of this meson.

5 pages, 2 figures

References in corpus (6)

• Exotics: Heavy Pentaquarks and Tetraquarks
• Measurements of $\psi (2S)$ and $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Theoretical uncertainties in exclusive electroproduction S-wave heavy quarkonia
• Spin rotation effects in diffractive electroproduction of heavy quarkonia
• Semileptonic $B_c$ decays to $P-$wave charmonium and the nature of ${\chi }_{c1}(3872)$
• Light-front approach to axial-vector quarkonium ${\gamma }^{\ast }{\gamma }^{\ast }$ form factors