Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pppp collisions at 8TeV

Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pppp collisions at 8TeV

Bibliographic Details
Parent link:The European Physical Journal C: Scientific Journal
Vol. 78, iss. 9.— 2018.— [701, 30 р.,]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Sirunyan А. М., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Asilar E. Ece, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich
Summary:Title screen
A measurement is presented of the effective leptonic weak mixing angle (sin2θℓeffsin2⁡θeffℓ) using the forward-backward asymmetry of Drell-Yan lepton pairs (μμμμ and ee ee) produced in proton-proton collisions at s√=8TeVs=8TeV at the CMS experiment of the LHC. The data correspond to integrated luminosities of 18.8 and 19.6fb−119.6fb−1 in the dimuon and dielectron channels, respectively, containing 8.2 million dimuon and 4.9 million dielectron events. With more events and new analysis techniques, including constraints obtained on the parton distribution functions from the measured forward-backward asymmetry, the statistical and systematic uncertainties are significantly reduced relative to previous CMS measurements. The extracted value of sin2θℓeffsin2⁡θeffℓ from the combined dilepton data is sin2θℓeff=0.23101±0.00036(stat)±0.00018(syst)±0.00016(theo)±0.00031(parton distributions in proton)=0.23101±0.00053sin2⁡θeffℓ=0.23101±0.00036(stat)±0.00018(syst)±0.00016(theo)±0.00031(parton distributions in proton)=0.23101±0.00053.
Language:English
Published: 2018
Subjects:
электронный ресурс
труды учёных ТПУ
CMS
physics
спектроскопия
адронное взаимодействие
протон-протонные соударения
Online Access:https://doi.org/10.1140/epjc/s10052-018-6148-7
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660749

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