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

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pp collisions at 8 TeV. The European Physical Journal C, 78 (9). pp. 1-30. ISSN 1434-6044 E-ISSN 1434-6052

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Abstract

A measurement is presented of the effective leptonic weak mixing angle (sin2 θ eff) using the forward– backward asymmetry of Drell–Yan lepton pairs (μμ and ee) produced in proton–proton collisions at √s = 8 TeV at the CMS experiment of the LHC. The data correspond to integrated luminosities of 18.8 and 19.6 fb−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 sin2 θ eff from the combined dilepton data is sin2 θ eff = 0.23101 ± 0.00036 (stat) ± 0.00018 (syst) ± 0.00016 (theo) ± 0.00031 (parton distributions in proton) = 0.23101 ± 0.00053.

Item Type:	Article (Journal)
Additional Information:	7861/70410
Uncontrolled Keywords:	Drell-Yan events; pp collisions at 8 TeV
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	04 Feb 2019 11:12
Last Modified:	15 Jul 2019 09:26
URI:	http://irep.iium.edu.my/id/eprint/70410

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