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Central exclusive production of $\eta_c$ and $\chi_{c0}$ in the light-front k$_{\perp}-factorization approach
by Izabela Babiarz, Roman Pasechnik, Wolfgang Schäfer, Antoni Szczurek
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Submission summary
| Authors (as registered SciPost users): | Wolfgang Schäfer |
| Submission information | |
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| Preprint Link: | scipost_202107_00086v1 (pdf) |
| Date accepted: | March 1, 2022 |
| Date submitted: | July 30, 2021, 10:26 a.m. |
| Submitted by: | Wolfgang Schäfer |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Phenomenological |
Abstract
We study the exclusive production of $J^{PC}=0^{++}, 0^{--}$ charmonium states in proton-proton collisions at the LHC energies. The amplitudes for $g^*g^*→\chi_{c0}$ as well as for$ gg→\eta_c$ mechanisms are derived in the kT-factorization approach. The $pp \to pp\eta_c$ reaction is discussed for the first time. We observe a substantial contribution from the nonperturbative domain of gluon virtualities, especially for $\eta_c$ production. To model the nonperturbative region better, we utilize models of the unintegrated gluon distribution based on parametrizations of the color dipole cross-section.
Published as SciPost Phys. Proc. 8, 118 (2022)