Title
Measurements of <tex>$t\bar{t}$</tex> spin correlations and top-quark polarization using dilepton final states in pp collisions at <tex>$\sqrt{s}$</tex> = 7 TeV Measurements of <tex>$t\bar{t}$</tex> spin correlations and top-quark polarization using dilepton final states in pp collisions at <tex>$\sqrt{s}$</tex> = 7 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
112(2014) :18 , 16 p.
ISSN
0031-9007
Article Reference
182001
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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 root 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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/1c08bc/7678.pdf
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