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Top-pair forward-backward asymmetry from loops of new strongly coupled quarks.
- Source :
-
Physical Review D: Particles, Fields, Gravitation & Cosmology . Mar2012, Vol. 85 Issue 5, p1-6. 6p. - Publication Year :
- 2012
-
Abstract
- We examine loop-mediated effects of new heavy quarks Q = (t′, b′) on t&tmacr; production at hadron colliders, using a phenomenological model with flavor off-diagonal couplings of charged and neutral scalars &phis; = (&phis;±, &phis;0) to Q. We show that an invariant-mass-dependent asymmetry, in the t&tmacr; center of mass, consistent with those recently reported by the CDF collaboration, can be obtained for quark masses around 350-500 GeV, scalar masses of order 100-200 GeV, and modest-to-strong Yukawa couplings. The requisite strong interactions suggest a nonperturbative electroweak-symmetry-breaking mechanism and composite states at the weak scale. A typical prediction of this framework is that the new heavy quarks decay dominantly into t&phis; final states [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 24700010
- Volume :
- 85
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Physical Review D: Particles, Fields, Gravitation & Cosmology
- Publication Type :
- Periodical
- Accession number :
- 76255785
- Full Text :
- https://doi.org/10.1103/PhysRevD.85.054001