Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV
Abstract The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum energy of $$\sqrt{s} =13$$ s = 13 TeV collected during the LHC Run 2 data-taking period. The measurement is performed by combining the...
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SpringerOpen
2025-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13506-x |
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| author | ALICE Collaboration |
| author_facet | ALICE Collaboration |
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| description | Abstract The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum energy of $$\sqrt{s} =13$$ s = 13 TeV collected during the LHC Run 2 data-taking period. The measurement is performed by combining the measurements of the electromagnetic calorimeter EMCal and the central tracking detectors ITS and TPC, covering a pseudorapidity range of $$|\eta ^{\gamma }|<0.67$$ | η γ | < 0.67 and a transverse momentum range of $$7<p_\textrm{T}^{\gamma } <200~$$ 7 < p T γ < 200 GeV/ $$c$$ c . The result extends to lower $$p_\textrm{T}^{\gamma }$$ p T γ and $$x_\textrm{T}^{\gamma } = 2p_\textrm{T}^{\gamma }/\sqrt{s} $$ x T γ = 2 p T γ / s ranges, the lowest $$x_\textrm{T}^{\gamma }$$ x T γ of any isolated photon measurements to date, extending significantly those measured by the ATLAS and CMS experiments towards lower $$p_\textrm{T}^{\gamma }$$ p T γ at the same collision energy with a small overlap between the measurements. The measurement is compared with next-to-leading order perturbative QCD calculations and the results from the ATLAS and CMS experiments as well as with measurements at other collision energies. The measurement and theory prediction are in agreement with each other within the experimental and theoretical uncertainties. |
| format | Article |
| id | doaj-art-2fb62725f3404ebf976ebe95831ef263 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
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| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-2fb62725f3404ebf976ebe95831ef2632025-02-02T12:38:26ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-01-0185112410.1140/epjc/s10052-024-13506-xMeasurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeVALICE Collaboration0CERNAbstract The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at centre-of-momentum energy of $$\sqrt{s} =13$$ s = 13 TeV collected during the LHC Run 2 data-taking period. The measurement is performed by combining the measurements of the electromagnetic calorimeter EMCal and the central tracking detectors ITS and TPC, covering a pseudorapidity range of $$|\eta ^{\gamma }|<0.67$$ | η γ | < 0.67 and a transverse momentum range of $$7<p_\textrm{T}^{\gamma } <200~$$ 7 < p T γ < 200 GeV/ $$c$$ c . The result extends to lower $$p_\textrm{T}^{\gamma }$$ p T γ and $$x_\textrm{T}^{\gamma } = 2p_\textrm{T}^{\gamma }/\sqrt{s} $$ x T γ = 2 p T γ / s ranges, the lowest $$x_\textrm{T}^{\gamma }$$ x T γ of any isolated photon measurements to date, extending significantly those measured by the ATLAS and CMS experiments towards lower $$p_\textrm{T}^{\gamma }$$ p T γ at the same collision energy with a small overlap between the measurements. The measurement is compared with next-to-leading order perturbative QCD calculations and the results from the ATLAS and CMS experiments as well as with measurements at other collision energies. The measurement and theory prediction are in agreement with each other within the experimental and theoretical uncertainties.https://doi.org/10.1140/epjc/s10052-024-13506-x |
| spellingShingle | ALICE Collaboration Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV European Physical Journal C: Particles and Fields |
| title | Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV |
| title_full | Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV |
| title_fullStr | Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV |
| title_full_unstemmed | Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV |
| title_short | Measurement of the inclusive isolated-photon production cross section in pp collisions at $$\mathbf {\sqrt{\textit{s}}=13}$$ s = 13 TeV |
| title_sort | measurement of the inclusive isolated photon production cross section in pp collisions at mathbf sqrt textit s 13 s 13 tev |
| url | https://doi.org/10.1140/epjc/s10052-024-13506-x |
| work_keys_str_mv | AT alicecollaboration measurementoftheinclusiveisolatedphotonproductioncrosssectioninppcollisionsatmathbfsqrttextits13s13tev |