669 articles – 6775 references  [version française]
HAL: in2p3-00730778, version 1

Detailed view  Export this paper
Physical Review D 87 (2013) 012006
Observation of a diffractive contribution to dijet production in proton-proton collisions at sqrt(s)=7 TeV
S. Chatrchyan, M. Besancon1, S. Choudhury1, M. Dejardin1, D. Denegri1, B. Fabbro1, J.L. Faure1, F. Ferri1, S. Ganjour1, A. Givernaud1, P. Gras1, G. Hamel de Monchenault1, P. Jarry1, E. Locci1, J. Malcles1, L. Millischer1, A. Nayak1, J. Rander1, A. Rosowsky1, I. Shreyber1, M. Titov1, S. Baffioni2, F. Beaudette2, L. Benhabib2, L. Bianchini2, M. Bluj2, C. Broutin2, Pierre Busson2, C. Charlot2, N. Daci2, T. Dahms2, L. Dobrzynski2, R. Granier de Cassagnac2, M. Haguenauer2, P. Mine2, C. Mironov2, I.N. Naranjo2, M. Nguyen2, C. Ochando2, P. Paganini2, D. Sabes2, R. Salerno2, Y. Sirois2, C. Veelken2, A. Zabi2, J.-L. Agram3, J. Andrea3, D. Bloch3, D. Bodin3, J.-M. Brom3, M. Cardaci3, E.C. Chabert3, C. Collard3, E. Conte3, F. Drouhin3, C. Ferro3, J.-C. Fontaine3, D. Gele3, U. Goerlach3, P. Juillot3, A.-C. Le Bihan3, P. Van Hove3, F. Fassi4, D. Mercier4, S. Beauceron5, N. Beaupere5, O. Bondu5, G. Boudoul5, J. Chasserat5, R. Chierici5, D. Contardo5, P. Depasse5, H. El Mamouni5, J. Fay5, S. Gascon5, M. Gouzevitch5, B. Ille5, T. Kurca5, M. Lethuillier5, L. Mirabito5, S. Perries5, V. Sordini5, Y. Tschudi5, P. Verdier5, S. Viret5
For the CMS collaboration(s)

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.
1:  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
2:  LLR - Laboratoire Leprince-Ringuet
3:  IPHC - Institut Pluridisciplinaire Hubert Curien
4:  CC IN2P3 - Centre de Calcul de l'inst. national de phy. nucléaire et de phy. des particules
5:  IPNL - Institut de Physique Nucléaire de Lyon
Physics/High Energy Physics - Experiment
Fulltext link: