Measurement of the combined rapidity and $p_T$ dependence of dijet azimuthal decorrelations in $p\bar{p}$ collisions at $\sqrt{s}=1.96\,$TeV
V.M. Abazov
,
U. Bassler
(1)
,
G. Bernardi
(2)
,
M. Besançon
(1)
,
D. Brown
(2)
,
J. Brown
(2)
,
E. Chapon
(1)
,
F. Couderc
(1)
,
F. Deliot
(1)
,
Y. Enari
(2)
,
S. Greder
(3)
,
G. Grenier
(4)
,
A. Grohsjean
(1)
,
Z. Hubacek
(1)
,
T. Kurca
(4)
,
P. Lebrun
(4)
,
J. Lellouch
(2)
,
F. Miconi
(3)
,
C. Royon
(1)
,
V. Shary
(1)
,
M. Titov
(1)
,
P. Verdier
(4)
,
D. Vilanova
(1)
,
F. Badaud
(5)
,
Ph. Gris
(5)
,
J.-F. Grivaz
(6)
,
T. Guillemin
(6)
,
M. Jaffré
(6)
,
P. Pétroff
(6)
,
M.-C. Cousinou
(7)
,
A. Duperrin
(7)
,
W. Geng
(7)
,
E. Kajfasz
(7)
,
S. Kermiche
(7)
,
E. Nagy
(7)
,
N. Osman
(7)
,
G. Sajot
(8)
,
J. Stark
(8)
1
IRFU -
Institut de Recherches sur les lois Fondamentales de l'Univers
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 IPHC - Institut Pluridisciplinaire Hubert Curien
4 IPNL - Institut de Physique Nucléaire de Lyon
5 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
6 LAL - Laboratoire de l'Accélérateur Linéaire
7 CPPM - Centre de Physique des Particules de Marseille
8 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 IPHC - Institut Pluridisciplinaire Hubert Curien
4 IPNL - Institut de Physique Nucléaire de Lyon
5 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
6 LAL - Laboratoire de l'Accélérateur Linéaire
7 CPPM - Centre de Physique des Particules de Marseille
8 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
V.M. Abazov
- Function : Author
- PersonId : 741027
- IdHAL : patrice-jean-marie-lebrun
- ORCID : 0000-0001-6115-5856
V. Shary
- Function : Author
- PersonId : 753233
- IdHAL : viatcheslav-sharyy
E. Kajfasz
- Function : Author
- PersonId : 742630
- IdHAL : eric-kajfasz
- ORCID : 0000-0002-8575-405X
- IdRef : 150389043
Abstract
We present the first combined measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations, based on the recently proposed quantity $R_{\Delta \phi}$. The variable $R_{\Delta \phi}$ measures the fraction of the inclusive dijet events in which the azimuthal separation of the two jets with the highest transverse momenta is less than a specified value for the parameter $\Delta \phi_{\rm max}$. The quantity $R_{\Delta \phi}$ is measured in $p\bar{p}$ collisions at $\sqrt{s}=1.96\,$TeV, as a function of the dijet rapidity interval, the total scalar transverse momentum, and $\Delta \phi_{\rm max}$. The measurement uses an event sample corresponding to an integrated luminosity of $0.7\,$fb$^{-1}$ collected with the D0 detector at the Fermilab Tevatron Collider. The results are compared to predictions of a perturbative QCD calculation at next-to-leading order in the strong coupling with corrections for non-perturbative effects. The theory predictions describe the data, except in the kinematic region of large dijet rapidity intervals and large $\Delta \phi_{\rm max}$.