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Title

Measurement of the differential cross section for isolated prompt photon production in pp collisions at 7 TeV

AuthorsChatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Jorda, C. ; Lobelle Pardo, P. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Piedra, Jonatan ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Sobron Sañudo, M. ; Vila, Iván ; Vilar, Rocío
Issue DateSep-2011
PublisherAmerican Physical Society
CitationPhysical Review D 84(5): 052011 (2011)
AbstractA measurement of the differential cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a center-of-mass energy of 7 TeV is presented. The data sample corresponds to an integrated luminosity of 36  pb-1 recorded by the CMS detector at the LHC. The measurement covers the pseudorapidity range |η|<2.5 and the transverse energy range 25<ET<400  GeV, corresponding to the kinematic region 0.007<xT<0.114. Photon candidates are identified with two complementary methods, one based on photon conversions in the silicon tracker and the other on isolated energy deposits in the electromagnetic calorimeter. The measured cross section is presented as a function of ET in four pseudorapidity regions. The next-to-leading-order perturbative QCD calculations are consistent with the measured cross section.
Description29 páginas, 9 figuras, 6 tablas.-- PACS numbers: 13.85.Qk.-- Creative Commons Attribution 3.0 License.-- CMS Collaboration: et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.84.052011
URIhttp://hdl.handle.net/10261/46247
DOI10.1103/PhysRevD.84.052011
ISSN1550-7998
E-ISSN1550-2368
Appears in Collections:(IFCA) Artículos
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