Rapidity distributions are presented for events containing either a Z boson
or a photon with a single jet in proton-proton collisions produced at the CERN
LHC. The data, collected with the CMS detector at sqrt(s) = 7 TeV, correspond
to an integrated luminosity of 5.0 inverse femtobarns. The individual rapidity
distributions of the boson and the jet are consistent within 5% with
expectations from perturbative QCD. However, QCD predictions for the sum and
the difference in rapidities of the two final-state objects show discrepancies
with CMS data. In particular, next-to-leading-order QCD calculations, and two
common Monte Carlo event generators using different methods to match
matrix-element partons with parton showers, appear inconsistent with the data
as well as with each other.
Research center :
AGIF - Algèbre, Géométrie et Interactions fondamentales
Disciplines :
Physics
Author, co-author :
Daubie, Evelyne ; Université de Mons > Faculté des Sciences > Service de Physique nucléaire et subnucléaire
Beliy, Nikita ; Université de Mons > Faculté des Sciences > Physique nucléaire et subnucléaire
Caebergs, Thierry ; Université de Mons > Faculté des Sciences > Physique nucléaire et subnucléaire
Hammad, Grégory ; Université de Mons > Faculté des Sciences > Physique nucléaire et subnucléaire
Vander Velde, Catherine
CMS Collaboration
Language :
English
Title :
Rapidity distributions in exclusive Z + jet and gamma + jet events in pp collisions at sqrt(s)= 7 TeV
Publication date :
23 November 2013
Journal title :
Physical Review. D, Particles and Fields
ISSN :
0556-2821
Publisher :
American Physical Society, Lancaster, Panama
Volume :
88
Pages :
1-17 (112009)
Peer reviewed :
Peer reviewed
Research unit :
S824 - Physique nucléaire et subnucléaire
Research institute :
R150 - Institut de Recherche sur les Systèmes Complexes
Commentary :
Replaced with published version. Added journal reference and DOI
