Measurement Of The Weak Mixing Angle Using The Forward–Backward Asymmetry Of Drell–Yan Events İn PpPp collisions At 8tev
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Tarih
2018
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Springer Link
Erişim Hakkı
Özet
A measurement is presented of the effective leptonic weak mixing angle (sin2??effsin2??eff?) using the forward–backward asymmetry of Drell–Yan lepton pairs (???? 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 sin2??effsin2??eff? from the combined dilepton data is sin2??eff=0.23101±0.00036(stat)±0.00018(syst)±0.00016(theo)±0.00031(parton distributions in proton)=0.23101±0.00053sin2??eff?=0.23101±0.00036(stat)±0.00018(syst)±0.00016(theo)±0.00031(parton distributions in proton)=0.23101±0.00053
Açıklama
Anahtar Kelimeler
CMS, Physics
