Single isolated photon production in the NLO${}^\star$ approximation of the Parton Reggeization Approach
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909443054108672 |
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| author | Chernyshev, Alexey Saleev, Vladimir |
| author_facet | Chernyshev, Alexey Saleev, Vladimir |
| contents | The hadroproduction of single isolated photon at high energies is studied within the framework of the NLO${}^\star$ approximation of the Parton Reggeization Approach based on the modified Multi-Regge limit of the hard scattering QCD amplitudes. The contribution from the LO subprocess $Q \bar Q \to γ$ and the NLO tree-level corrections $Q R \to γq$ and $Q \bar Q \to γg$ are considered. To avoid specific double counting in rapidity between tree-level corrections to the hard scattering coefficient and unintegrated PDFs, a corresponding subtraction scheme is proposed. We demonstrated self-consistency of the Parton Reggeization Approach using the subtraction scheme. The results of calculations are compared with data from various Collaborations in the wide energy range $\sqrt{S} = 24 \ {\rm GeV} - 13 \ {\rm TeV}$. We obtained a quite satisfactory agreement with data up to $p_T^γ/ \sqrt{S} \simeq 0.2 - 0.3$. Predictions for the future SPD NICA experiment were discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_06644 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Single isolated photon production in the NLO${}^\star$ approximation of the Parton Reggeization Approach Chernyshev, Alexey Saleev, Vladimir High Energy Physics - Phenomenology The hadroproduction of single isolated photon at high energies is studied within the framework of the NLO${}^\star$ approximation of the Parton Reggeization Approach based on the modified Multi-Regge limit of the hard scattering QCD amplitudes. The contribution from the LO subprocess $Q \bar Q \to γ$ and the NLO tree-level corrections $Q R \to γq$ and $Q \bar Q \to γg$ are considered. To avoid specific double counting in rapidity between tree-level corrections to the hard scattering coefficient and unintegrated PDFs, a corresponding subtraction scheme is proposed. We demonstrated self-consistency of the Parton Reggeization Approach using the subtraction scheme. The results of calculations are compared with data from various Collaborations in the wide energy range $\sqrt{S} = 24 \ {\rm GeV} - 13 \ {\rm TeV}$. We obtained a quite satisfactory agreement with data up to $p_T^γ/ \sqrt{S} \simeq 0.2 - 0.3$. Predictions for the future SPD NICA experiment were discussed. |
| title | Single isolated photon production in the NLO${}^\star$ approximation of the Parton Reggeization Approach |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.06644 |