W+W− boson pair production in proton-proton collisions at √s=13  TeV

W+W− boson pair production in proton-proton collisions at √s=13  TeV

Detalles Bibliográficos
Parent link:Physical Review D: particles, fields, gravitation, and cosmology.— , 1970-
Vol. 102, iss. 9.— 2020.— [092001, 30 p.]
Autor Corporativo: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Otros Autores: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich, Sukhikh L. G. Leonid Grigorievich
Sumario:Title screen
A measurement of the W+W− boson pair production cross section in proton-proton collisions at √s=13  TeV is presented. The data used in this study are collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 35.9  fb−1. The W+W− candidate events are selected by requiring two oppositely charged leptons (electrons or muons). Two methods for reducing background contributions are employed. In the first one, a sequence of requirements on kinematic quantities is applied allowing a measurement of the total production cross section, 117.6±6.8  pb, which agrees well with the theoretical prediction. Fiducial cross sections are also reported for events with zero or one jet, and the change in the zero-jet fiducial cross section with the jet transverse momentum threshold is measured. Normalized differential cross sections are reported within the fiducial region. A second method for suppressing background contributions employs two random forest classifiers. The analysis based on this method includes a measurement of the total production cross section and also a measurement of the normalized jet multiplicity distribution in W+W− events. Finally, a dilepton invariant mass distribution is used to probe for physics beyond the standard model in the context of an effective field theory, and constraints on the presence of dimension-6 operators are derived.
Publicado: 2020
Materias:
электронный ресурс
труды учёных ТПУ
Acceso en línea:http://earchive.tpu.ru/handle/11683/72769
https://doi.org/10.1103/PhysRevD.102.092001
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666167

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