Constraints on baryon-nonconserving Yukawa couplings in a supersymmetric theory

Brahmachari, Biswajoy ; Roy, Probir (1994) Constraints on baryon-nonconserving Yukawa couplings in a supersymmetric theory Physical Review D - Particles, Fields, Gravitation and Cosmology, 50 (1). R39-R42. ISSN 1550-7998

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Official URL: http://prd.aps.org/abstract/PRD/v50/i1/pR39_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.50.R39

Abstract

The 1-loop evolution of couplings in the minimal supersymmetric standard model, extended to include baryon nonconserving (B/) operators through explicit R-parity violation, is considered keeping only B/ superpotential terms involving the maximum possible number of third generation superfields. If all retained Yukawa couplings Yi are required to remain in the perturbative domain (Yi < 1) up to the scale of gauge group unification, upper bounds ensue on the magnitudes of the B/ coupling strengths at the supersymmetry-breaking scale, independent of the model of unification. They turn out to be similar to the corresponding fixed point values reached from a wide range of Yi (including all Yi greater than unity) at the unification scale. The coupled evolution of the top quark and B/ Yukawa couplings results in a reduction of the fixed point value of the former.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:46502
Deposited On:05 Jul 2011 06:16
Last Modified:18 May 2016 02:21

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