Measurement of diffraction dissociation cross sections in pp collisions at sqrt(s) = 7 TeV

CMS Collaboration

Research output: Contribution to journalArticle

54 Citations (Scopus)
29 Downloads (Pure)

Abstract

Measurements of diffractive dissociation cross sections in pp collisions at sqrt(s) = 7 TeV are presented in kinematic regions defined by the masses M[X] and M[Y] of the two final-state hadronic systems separated by the largest rapidity gap in the event. Differential cross sections are measured as a function of xi[X]= M[X]^2/s in the region -5.5 3, log[10]M[X] > 1.1, and log[10]M[Y] > 1.1, a region dominated by DD. The cross sections integrated over these regions are found to be, respectively, 2.99 +/- 0.02 (stat) +0.32 -0.29 (syst) mb, 1.18 +/- 0.02 (stat) +/- 0.13 (syst) mb, and 0.58 +/- 0.01 (stat) +0.13 -0.11 (syst) mb, and are used to extract total SD and DD cross sections. In addition, the inclusive differential cross section, d sigma /d Delta eta[F], for events with a pseudorapidity gap adjacent to the edge of the detector, is measured over Delta eta[F] = 8.4 units of pseudorapidity. The results are compared to those of other experiments and to theoretical predictions, and found compatible with slowly-rising diffractive cross sections as a function of center-of-mass energy.
Original languageEnglish
Article number012003
Number of pages32
JournalPhysical Review D. Particles, Fields, Gravitation, and Cosmology
Volume92
Issue number1
DOIs
Publication statusPublished - 6 Jul 2015

Bibliographical note

Replaced with published version. Added journal reference and DOI

Fingerprint Dive into the research topics of 'Measurement of diffraction dissociation cross sections in pp collisions at sqrt(s) = 7 TeV'. Together they form a unique fingerprint.

Cite this