Observation of a diffractive contribution to dijet production in proton-proton collisions at sqrt(s)=7 TeV

Abstract : The cross section for dijet production in pp collisions at sqrt(s) = 7 TeV is presented as a function of xi, a variable that approximates the fractional momentum loss of the scattered proton in single-diffractive events. The analysis is based on an integrated luminosity of 2.7 inverse nanobarns collected with the CMS detector at the LHC at low instantaneous luminosities, and uses events with jet transverse momentum of at least 20 GeV. The dijet cross section results are compared to the predictions of diffractive and non-diffractive models. The low-xi data show a significant contribution from diffractive dijet production, observed for the first time at the LHC. The associated rapidity gap survival probability is estimated.
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Article dans une revue
Physical Review D, American Physical Society, 2013, 87, pp.012006. <10.1103/PhysRevD.87.012006>


http://hal.in2p3.fr/in2p3-00730778
Contributeur : Sylvie Flores <>
Soumis le : mardi 11 septembre 2012 - 10:11:37
Dernière modification le : mercredi 27 juillet 2016 - 14:48:48

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S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Observation of a diffractive contribution to dijet production in proton-proton collisions at sqrt(s)=7 TeV. Physical Review D, American Physical Society, 2013, 87, pp.012006. <10.1103/PhysRevD.87.012006>. <in2p3-00730778>

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