Multiplicity dependence of $Υ$(nS) mean transverse momentum in proton-proton collisions
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866914412597608448 |
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| author | Mariñez, Luis Gabriel Gallegos Palomo, Lizardo Valencia Barrera, Luis Cedillo |
| author_facet | Mariñez, Luis Gabriel Gallegos Palomo, Lizardo Valencia Barrera, Luis Cedillo |
| contents | Correct description of quarkonia production and kinematics are still one of the most challenging assignments for Quantum Chromodynamics. This document presents a study of the $Υ$(1S), (2S) and (3S) mean transverse momentum ($\langle p_{\mathrm{T}}^Υ \rangle$) as a function of the charged particle multiplicity ($N_{\mathrm{Track}}$) in proton-proton collisions at $\sqrt{s}$ = 7 TeV generated with Pythia 8.312 CUETP8M1 tune. The comparison to real data collected by the CMS experiment indicates that the agreement is much better for the excited states than for the ground state. The observed fast increase of the $\langle p_{\mathrm{T}}^Υ \rangle$ at small values of $N_{\mathrm{Track}}$ is mainly due to the contribution from the away region. Furthermore, when computing the $\langle p_{\mathrm{T}}^Υ \rangle$ from jetty and isotropic events a clear $p_{\mathrm{T}}$ hardening is observed in jetty events. Finally, analyzing the fragmentation of jets containing an $Υ$(nS) it is proposed a method to test the new quarkonia shower present in the Monte Carlo event generator. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_07824 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multiplicity dependence of $Υ$(nS) mean transverse momentum in proton-proton collisions Mariñez, Luis Gabriel Gallegos Palomo, Lizardo Valencia Barrera, Luis Cedillo High Energy Physics - Phenomenology Correct description of quarkonia production and kinematics are still one of the most challenging assignments for Quantum Chromodynamics. This document presents a study of the $Υ$(1S), (2S) and (3S) mean transverse momentum ($\langle p_{\mathrm{T}}^Υ \rangle$) as a function of the charged particle multiplicity ($N_{\mathrm{Track}}$) in proton-proton collisions at $\sqrt{s}$ = 7 TeV generated with Pythia 8.312 CUETP8M1 tune. The comparison to real data collected by the CMS experiment indicates that the agreement is much better for the excited states than for the ground state. The observed fast increase of the $\langle p_{\mathrm{T}}^Υ \rangle$ at small values of $N_{\mathrm{Track}}$ is mainly due to the contribution from the away region. Furthermore, when computing the $\langle p_{\mathrm{T}}^Υ \rangle$ from jetty and isotropic events a clear $p_{\mathrm{T}}$ hardening is observed in jetty events. Finally, analyzing the fragmentation of jets containing an $Υ$(nS) it is proposed a method to test the new quarkonia shower present in the Monte Carlo event generator. |
| title | Multiplicity dependence of $Υ$(nS) mean transverse momentum in proton-proton collisions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.07824 |