Higgs bosons in left-right-symmetric models

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Physical Review (Section) D: Particles and Fields; (USA)

DOI:https://doi.org/10.1103/PhysRevD.40.1546· OSTI ID:5554320

Gunion, J F ^[1]; Grifols, J; Mendez, A ^[2]; Kayser, B ^[3]; Olness, F ^[4]

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1. Department of Physics, University of California at Davis, Davis, California 95616 (US)
2. Grup de Fisica Teorica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
3. National Science Foundation, Washington, D.C. 20550
4. Institute for Theoretical Science, University of Oregon, Eugene, Oregon 97403

In the context of minimal left-right-symmetric extensions of the standard SU(2){sub {ital L}}{times}U(1) model, four possible scenarios emerge depending upon the number of neutral Higgs fields that acquire nonzero vacuum expectation values. We examine these four scenarios in the case of a simple form for the scalar potential of the model. We find that by combining the minimization conditions appropriate to each of these scenarios with constraints coming from {ital K}{sub {ital L}}-{ital K}{sub {ital S}} mixing and the absence of flavor-changing neutral currents, two of the scenarios are ruled out. For the allowed scenarios rather definitive consequences for the Higgs sector can be obtained. For instance, several of the scalar bosons are forced to be very heavy by flavor-changing neutral-current constraints. Aside from the Higgs boson which plays the role of the standard-model Higgs fields, the three left-handed triplet members are most likely to be light. Indeed, in one of the vacuum-expectation-value scenarios they are forced to be light (the neutral member being massless at the tree level). We catalogue the constraints from low-energy experiments on a doubly charged Higgs triplet and a very light neutral Higgs triplet, when these couple to two leptons (as in the left-right model). Many of the constraints we obtain are new. A new lower bound on the {ital W}{sub {ital R}} mass, related to the strength of these lepton-lepton couplings, is derived. The cross sections for these bosons are large out to masses of order several TeV and signatures for their decay are striking and essentially background-free.

• OSTI ID: 5554320
• Journal Information: Physical Review (Section) D: Particles and Fields; (USA), Journal Name: Physical Review (Section) D: Particles and Fields; (USA) Vol. 40:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BOSONS
COMPOSITE MODELS
CROSS SECTIONS
CURRENTS
EIGENSTATES
ELEMENTARY PARTICLES
FLAVOR MODEL
HADRONS
HIGGS BOSONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
KAONS NEUTRAL SHORT-LIVED
LIE GROUPS
MASS
MATHEMATICAL MODELS
MESONS
NEUTRAL CURRENTS
PARTICLE MODELS
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM NUMBERS
QUARK MODEL
SCALAR FIELDS
STANDARD MODEL
STRANGE MESONS
STRANGE PARTICLES
SU GROUPS
SU-2 GROUPS
SYMMETRY
SYMMETRY GROUPS
U GROUPS
U-1 GROUPS
UNIFIED GAUGE MODELS