Measurement of the weak mixing angle using the forward-backward asymmetry of Drell-Yan events in pp collisions at 8 TeV
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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer New York LLC
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/70410/ http://irep.iium.edu.my/70410/ http://irep.iium.edu.my/70410/ http://irep.iium.edu.my/70410/1/70410_Measurement%20of%20the%20weak%20mixing%20angle%20using_article.pdf http://irep.iium.edu.my/70410/7/70410_Measurement%20of%20the%20weak%20mixing%20angle%20using_scopus.pdf http://irep.iium.edu.my/70410/13/70410_Measurement%20of%20the%20weak%20mixing%20angle%20using_wos.pdf |
| Summary: | 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. |
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