Measurement of isolated photon production in pp and PbPb collisions at √sNN = 2.76 TeV

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URI: https://hdl.handle.net/10902/28922
ISSN: 0370-2693
ISSN: 1873-2445
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Autoría
Chatrchyan, S.; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José IbanAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Chuang, S. H.; Duarte Campderros, JorgeAutoridad Unican; Felcini, Marta; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; González Sánchez, Francisco JavierAutoridad Unican; Jordá Lope, Clara; Lobelle Pardo, Patricia; López Virto, María Amparo; Marco de Lucas, JesúsAutoridad Unican; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, FranciscoAutoridad Unican; Muñoz Sánchez, Francisca Javiela; Piedra Gómez, JonatanAutoridad Unican; [et al.]
Fecha
2012-04
Derechos
Attribution-NonCommercial-NoDerivatives 4.0 International. ©2012 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. Open access under CC BY-NC-ND license.
Publicado en
Physics Letters, Section B, 2012, 710(2), 256-277
Editorial
Elsevier
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Palabras clave
CMS
Physics
Heavy-ions
Photons
Resumen/Abstract
Isolated photon production is measured in proton–proton and lead–lead collisions at nucleon–nucleon centre-of-mass energies of 2.76 TeV in the pseudorapidity range |η| < 1.44 and transverse energies ET between 20 and 80 GeV with the CMS detector at the LHC. The measured ET spectra are found to be in good agreement with next-to-leading-order perturbative QCD predictions. The ratio of PbPb to pp isolated photon ET-differential yields, scaled by the number of incoherent nucleon–nucleon collisions, is consistent with unity for all PbPb reaction centralities.
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Attribution-NonCommercial-NoDerivatives 4.0 International. ©2012 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. Open access under CC BY-NC-ND license.Excepto si se señala otra cosa, la licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 International. ©2012 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. Open access under CC BY-NC-ND license.