The Top Quark Production Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell}$

Details The Top Quark Production Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell}$ The Top Quark Production Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell}$

2012-01-09

arxiv.org/abs/1201.1790v1

PhysRevLett.108, 072002 (2012)

Physics

High Energy Physics

High Energy Physics - Phenomenology

accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.108.072002

A large forward-backward asymmetry is seen in both the top quark rapidity distribution $A_{FB}^t$ and in the rapidity distribution of charged leptons $A_{FB}^\ell$ from top quarks produced at the Tevatron. We study the kinematic and dynamic aspects of the relationship of the two observables arising from the spin correlation between the charged lepton and the top quark with different polarization states. We emphasize the value of both measurements, and we conclude that a new physics model which produces more right-handed than left-handed top quarks is favored by the present data.

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