Abstract:
The measurement of the transverse momentum distribution of the dimuon
system, produced in the Drell–Yan process is reported for the Z boson mass
range of 60 to 120 GeV/c2
. The results are obtained using a data sample of
proton-proton collisions at a center-of-mass energy of 8 TeV, collected by
the CMS experiment at the Large Hadron Collider, corresponding to an
integrated luminosity of 18.4pb-1
. The measured transverse momentum
distribution is compared to the most commonly used event generators in the
CMS experiment such as Powheg+Pythia, MadGraph. Furthermore, the
transverse momentum distribution is compared with several tunes of Pythia
for the underlying event in the low transverse momentum regime and the
most accurate theoretical calculation at Next-to-Next-to Leading Order
(NNLO) from FEWZ package is used in the high transverse momentum
regime. It is concluded that Pythia generator with Z2star and Madgraph
describe the data well at low qT and high qT regimes, respectively. An overall
agreement with the predictions of the standard model is observed.
