Associated production of $J/ψ$ and direct photon in the NRQCD and the ICEM using the high-energy factorization
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866915227158708224 |
|---|---|
| author | Alimov, Lev Karpishkov, Anton Saleev, Vladimir |
| author_facet | Alimov, Lev Karpishkov, Anton Saleev, Vladimir |
| contents | We study the associated $J/ψ$ and direct photon production in the high-energy factorization, as it is formulated in the parton Reggeization approach, using two different models for the hadronization of a heavy quark-antiquark pair into a heavy quarkonium, namely the non-relativistic quantum chromodynamics (NRQCD) and the improved color evaporation model (ICEM). We find essential differences in the predictions for cross-section and transverse momenta spectra obtained using the NRQCD and the ICEM, which can be used to discriminate between these models. Our prediction for cross-sections of the associated $J/ψ$ and direct photon production at the LHC energies slightly overestimates the results obtained early in the next-to-leading order (NLO) calculation in the collinear parton model (CPM). We predict different two-particle correlation spectra in the associated $J/ψ$ and direct photon production which may be of interest for experimental study. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_01710 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Associated production of $J/ψ$ and direct photon in the NRQCD and the ICEM using the high-energy factorization Alimov, Lev Karpishkov, Anton Saleev, Vladimir High Energy Physics - Phenomenology We study the associated $J/ψ$ and direct photon production in the high-energy factorization, as it is formulated in the parton Reggeization approach, using two different models for the hadronization of a heavy quark-antiquark pair into a heavy quarkonium, namely the non-relativistic quantum chromodynamics (NRQCD) and the improved color evaporation model (ICEM). We find essential differences in the predictions for cross-section and transverse momenta spectra obtained using the NRQCD and the ICEM, which can be used to discriminate between these models. Our prediction for cross-sections of the associated $J/ψ$ and direct photon production at the LHC energies slightly overestimates the results obtained early in the next-to-leading order (NLO) calculation in the collinear parton model (CPM). We predict different two-particle correlation spectra in the associated $J/ψ$ and direct photon production which may be of interest for experimental study. |
| title | Associated production of $J/ψ$ and direct photon in the NRQCD and the ICEM using the high-energy factorization |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.01710 |