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Measurements of t¯t Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at √s=7  TeV

Measurements of t¯t Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at √s=7  TeV
Measurements of t¯t Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at √s=7  TeV
Spin correlations and polarization in the top quark–antiquark system are measured using dilepton final states produced in pp collisions at the LHC at √s=7  TeV. The data correspond to an integrated luminosity of 5.0  fb−1 collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.
1079-7114
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Chatrchyan, Serguei and Belyaev, Alexander (2014) Measurements of t¯t Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at √s=7  TeV. Physical Review Letters, 112 (18), [182001]. (doi:10.1103/PhysRevLett.112.182001).

Record type: Article

Abstract

Spin correlations and polarization in the top quark–antiquark system are measured using dilepton final states produced in pp collisions at the LHC at √s=7  TeV. The data correspond to an integrated luminosity of 5.0  fb−1 collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.

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Published date: 2014
Organisations: Physics & Astronomy

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Local EPrints ID: 410529
URI: http://eprints.soton.ac.uk/id/eprint/410529
ISSN: 1079-7114
PURE UUID: ee663a57-7df7-4869-bdea-95d3884b2299
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 09 Jun 2017 09:02
Last modified: 26 Nov 2019 01:43

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Author: Serguei Chatrchyan

University divisions

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