Lepton flavor violation in Higgs boson decays under the rare tau decay results

Journal Article · Sun Jan 01 04:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.016006· OSTI ID:20774648

Kanemura, Shinya; Ota, Toshihiko; Tsumura, Koji ^[1]

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1. Department of Physics, Osaka University, Toyonaka, Osaka 560-0043 (Japan)

We study lepton flavor violation (LFV) associated with tau leptons in the framework of the two Higgs doublet model, in which LFV couplings are introduced as a deviation from Model II Yukawa interaction. Parameters of the model are constrained from experimental results and also from requirements of theoretical consistencies such as vacuum stability and perturbative unitarity. Current data for rare tau decays provide substantial upper limits on the LFV Yukawa couplings in the large tan{beta} region (tan{beta} > or approx. 30), which are comparable with predictions in fundamental theories. Here tan{beta} is the ratio of vacuum expectation values of the two Higgs doublets. We show that a search for the LFV decays {phi}{sup 0}{yields}{tau}{sup {+-}}{mu}{sup {+-}} ({tau}{sup {+-}}e{sup {+-}}) of neutral Higgs bosons ({phi}{sup 0}=h,H and A) at future collider experiments can be useful to further constrain the LFV couplings especially in the relatively small tan{beta} region (tan{beta} < or approx. 30), where rare tau decay data cannot give any strong limit.

• OSTI ID: 20774648
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONSERVATION LAWS
ELECTRONS
EXPECTATION VALUE
FLAVOR MODEL
HIGGS BOSONS
HIGGS MODEL
LEPTONIC DECAY
MUONS MINUS
MUONS PLUS
POSITRONS
TAU PARTICLES
UNIFIED GAUGE MODELS
UNITARITY
UNITARY SYMMETRY