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

Abstract: A measurement is presented of the effective leptonic weak mixing angle (sin2?eff?) using the forward?backward asymmetry of Drell?Yan lepton pairs (?? 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 sin2?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±0.00053.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: European Physical Journal C, Vol. 78, Iss. 9, Art. Num. 701

Editorial: Springer New York LLC

 Fecha de publicación: 01/09/2018

Nº de páginas: 30

Tipo de publicación: Artículo de Revista

 DOI: 10.1140/epjc/s10052-018-6148-7

ISSN: 1434-6044,1434-6052

Url de la publicación: https://doi.org/10.1140/epjc/s10052-018-6148-7