Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6197
Title: Measurements of t t-bar spin correlations and top quark polarization using dilepton final states in pp collisions at sqrt(s) =8 TeV
Authors: CMS Collaboration
Karapınar, Güler
Keywords: Large Hadron Collider (LHC)
Compact Muon Solenoid
Issue Date: Mar-2016
Publisher: American Physical Society
Source: Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T.,...CMS Collaboration (2016). Measurements of t t ¯ spin correlations and top quark polarization using dilepton final states in pp collisions at √s =8 TeV. Physical Review D, 93(5). doi:10.1103/PhysRevD.93.052007
Abstract: Measurements of the top quark-antiquark (tt¯) spin correlations and the top quark polarization are presented for tt¯ pairs produced in pp collisions at s=8 TeV. The data correspond to an integrated luminosity of 19.5 fb-1 collected with the CMS detector at the LHC. The measurements are performed using events with two oppositely charged leptons (electrons or muons) and two or more jets, where at least one of the jets is identified as originating from a bottom quark. The spin correlations and polarization are measured from the angular distributions of the two selected leptons, both inclusively and differentially, with respect to the invariant mass, rapidity, and transverse momentum of the tt¯ system. The measurements are unfolded to the parton level and found to be in agreement with predictions of the standard model. A search for new physics in the form of anomalous top quark chromo moments is performed. No evidence of new physics is observed, and exclusion limits on the real part of the chromo-magnetic dipole moment and the imaginary part of the chromo-electric dipole moment are evaluated. © 2016 CERN.
URI: http://doi.org/10.1103/PhysRevD.93.052007
http://hdl.handle.net/11147/6197
ISSN: 2470-0010
2470-0029
Appears in Collections:Mathematics / Matematik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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