Measurement of the inclusive isolated photon production cross section in pp collisions at root s=7 TeV



Acharya, S, Acosta, FT, Adam, J, Adamova, D, Adler, A, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N
et al (show 1016 more authors) (2019) Measurement of the inclusive isolated photon production cross section in pp collisions at root s=7 TeV. EUROPEAN PHYSICAL JOURNAL C, 79 (11). 896-.

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Abstract

<jats:title>Abstract</jats:title> <jats:p>The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at a centre-of-momentum energy of <jats:inline-formula><jats:alternatives><jats:tex-math>$$\sqrt{s}=$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo></mml:mrow></mml:math></jats:alternatives></jats:inline-formula> 7 TeV. The measurement is performed with the electromagnetic calorimeter EMCal and the central tracking detectors, covering a range of <jats:inline-formula><jats:alternatives><jats:tex-math>$$|\eta |&lt;0.27$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>|</mml:mo><mml:mi>η</mml:mi><mml:mo>|</mml:mo><mml:mo>&lt;</mml:mo><mml:mn>0.27</mml:mn></mml:mrow></mml:math></jats:alternatives></jats:inline-formula> in pseudorapidity and a transverse momentum range of <jats:inline-formula><jats:alternatives><jats:tex-math>$$ 10&lt; p_\mathrm {T}^{\gamma }&lt; 60~\mathrm {GeV}/c$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>10</mml:mn><mml:mo>&lt;</mml:mo><mml:msubsup><mml:mi>p</mml:mi><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mi>γ</mml:mi></mml:msubsup><mml:mo>&lt;</mml:mo><mml:mn>60</mml:mn><mml:mspace /><mml:mi>GeV</mml:mi><mml:mo>/</mml:mo><mml:mi>c</mml:mi></mml:mrow></mml:math></jats:alternatives></jats:inline-formula>. The result extends the <jats:inline-formula><jats:alternatives><jats:tex-math>$$p_\mathrm {T}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math></jats:alternatives></jats:inline-formula> coverage of previously published results of the ATLAS and CMS experiments at the same collision energy to smaller <jats:inline-formula><jats:alternatives><jats:tex-math>$$p_\mathrm {T}$$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math></jats:alternatives></jats:inline-formula>. The measurement is compared to next-to-leading order perturbative QCD calculations and to the results from the ATLAS and CMS experiments. All measurements and theory predictions are in agreement with each other.</jats:p>

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 Feb 2020 11:25
Last Modified: 20 Jun 2024 19:01
DOI: 10.1140/epjc/s10052-019-7389-9
Open Access URL: https://doi.org/10.1140/epjc/s10052-019-7389-9
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3073579