The Angular Correlations in Top Quark Decays in Standard Model Extensions

Abstract

The CMS collaboration at the CERN-LHC have searched for the $t$-channel single top quark production using the spin correlation of the $t$-channel. The signal extraction and cross section measurement relies on the angular distribution of the charged lepton in the top quark decays, the angle between the charged lepton momentum and top spin in the top rest frame. The behavior of the angular distribution is a distinct slope for the t-channel single top (signal) while it is flat for the backgrounds. In this letter we investigate the contributions which this spin correlation may receive from a two-Higgs doublet model, a top-color assisted technicolor (TC2) and the noncommutative extension of the Standard Model.

5 figures

References in corpus (26)

• Noncommutative Field Theory
• Topcolor Assisted Technicolor
• Space-Time Noncommutative Field Theories And Unitarity
• Quark mass effects in B -> Xs gamma
• A minimal set of top anomalous couplings
• Angular Correlations in Top Quark Pair Production and Decay at Hadron Colliders
• Natural Topcolor--Assisted Technicolor
• GIM Violation and New Dynamics of the Third Generation
• QCD-corrected spin analysing power of jets in decays of polarized top quarks
• The Z -> gamma gamma, gg Decays in the Noncommutative Standard Model
• The photon-neutrino interaction in non-commutative gauge field theory and astrophysical bounds
• Measurements of the B -> X_s gamma Branching Fraction and Photon Spectrum from a Sum of Exclusive Final States
• W polarisation beyond helicity fractions in top quark decays
• Anomalous Wtb coupling effects in the weak radiative B-meson decay
• Space-Time Noncommutativity, Discreteness of Time and Unitarity
• Single Top Quark Production at the LHC: Understanding Spin
• The Top Quark Decay Vertex in Standard Model Extensions
• Photon Neutrino Scattering in Non-Commutative Space
• Semi-Leptonic Decay of a Polarized Top Quark in the Noncommutative Standard Model
• Top quark physics at the LHC
• Angular correlations in t-channel single top production at the LHC
• Secondary particles spectra in the decay of a polarized top quark with anomalous $tWb$ coupling
• Noncommutative Standard Model in Top Quark Sector
• Observing Spin Correlations in Single Top Production and Decay
• Testing Scalar-Sector CP Violation in Top-Quark Production and Decay at Linear e+e- Colliders
• Flavor changing neutral decay effects in models with two Higgs boson doublets: Applications to LHC Physics

Cited by in corpus (2)

• Measurement of the t-channel single top quark production cross section in pp collisions at sqrt(s) = 7 TeV
• Azimuthal polarization of polarized top quark in noncommutative standard model