IncreasingRband decreasingRcwith new heavy quarks
- 1 March 1996
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 53 (5) , R2276-R2278
- https://doi.org/10.1103/physrevd.53.r2276
Abstract
If the b and c quarks mix with new heavy quarks of weak isospin I3=−1 and 0, respectively, then the Z→bb¯(cc¯) rate is necessarily greater (smaller) than that of the standard model. This may be the reason for the Rb excess and Rc deficit observed at CERN LEP. A possible consequence of this scenario is the prospective discovery of a new quark x with the dominant decay x→ch, then h→bb¯, where h is a neutral Higgs boson.Keywords
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This publication has 9 references indexed in Scilit:
- Z→bb¯excess and top quark decayPhysical Review D, 1996
- Third-family flavor physics in an SU(3×SU(2×U(1modelPhysical Review D, 1995
- Quark singlets: Implications and constraintsPhysical Review D, 1995
- Singlet charge 2/3 quark hiding the top quark: Fermilab Tevatron and CERN LEP implicationsPhysical Review D, 1995
- Observation of the Top QuarkPhysical Review Letters, 1995
- Observation of Top Quark Production inCollisions with the Collider Detector at FermilabPhysical Review Letters, 1995
- Implications of a heavy top quark for the two Higgs doublet modelPhysical Review D, 1995
- Implications of Γ(Z → bb̄) for supersymmetry searches and model-buildingPhysics Letters B, 1994
- Review of Particle PropertiesPhysical Review D, 1994