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

CMS Collaboration

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A measurement is presented of the effective leptonic weak mixing angle (sin2θeffℓ) using the forward–backward asymmetry of Drell–Yan lepton pairs (μμ and e e) produced in proton–proton collisions at s=8TeV at the CMS experiment of the LHC. The data correspond to integrated luminosities of 18.8 and 19.6fb-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 sin2θeffℓ from the combined dilepton data is sin2θeffℓ=0.23101±0.00036(stat)±0.00018(syst)±0.00016(theo)±0.00031(parton distributions in proton)=0.23101±0.00053.

Original languageEnglish
Article number701
JournalEuropean Physical Journal C
Volume78
Issue number9
DOIs
Publication statusPublished - 1 Sep 2018

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Measurement of the weak mixing angle using the forward–backward asymmetry of Drell–Yan events in p p collisions at 8 TeV'. Together they form a unique fingerprint.

  • Cite this