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Title: Lepton flavor violation in the little Higgs model with T parity

Abstract

Little Higgs models with T-parity may provide us with a new source of lepton flavor violation, as such, in this paper we consider the anomalous magnetic moment of the muon (g-2){sub {mu}} and the lepton flavor violating decays {mu}{yields}e{gamma} and {tau}{yields}{mu}{gamma} in the little Higgs model with T-parity [A. Goyal, hep-ph/0609095.]. Our results show that the present experimental constraints of {mu}{yields}e{gamma} are a much more useful tool for constraining the new sources of flavor violation, than from the other processes considered here, which are present in T-parity models.

Authors:
 [1]; ;  [2];  [3];  [4]
  1. Center for Theoretical Physics, Jamia Millia University, Delhi-110025 (India)
  2. Universite de Lyon 1, Institut de Physique Nucleaire, 4 rue E. Fermi, F-69622 Villeurbanne Cedex (France)
  3. Theory Division, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
  4. Dept. of Physics and Astrophysics, University of Delhi, Delhi-110 007 (India)
Publication Date:
OSTI Identifier:
21020096
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.055011; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRONS; FLAVOR MODEL; HIGGS MODEL; MAGNETIC MOMENTS; MUONS; PARITY; PARTICLE DECAY; PHOTONS; SYMMETRY BREAKING; TAU PARTICLES

Citation Formats

Choudhury, S. Rai, Cornell, A. S., Deandrea, A., Gaur, Naveen, and Goyal, A. Lepton flavor violation in the little Higgs model with T parity. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.055011.
Choudhury, S. Rai, Cornell, A. S., Deandrea, A., Gaur, Naveen, & Goyal, A. Lepton flavor violation in the little Higgs model with T parity. United States. doi:10.1103/PHYSREVD.75.055011.
Choudhury, S. Rai, Cornell, A. S., Deandrea, A., Gaur, Naveen, and Goyal, A. Thu . "Lepton flavor violation in the little Higgs model with T parity". United States. doi:10.1103/PHYSREVD.75.055011.
@article{osti_21020096,
title = {Lepton flavor violation in the little Higgs model with T parity},
author = {Choudhury, S. Rai and Cornell, A. S. and Deandrea, A. and Gaur, Naveen and Goyal, A.},
abstractNote = {Little Higgs models with T-parity may provide us with a new source of lepton flavor violation, as such, in this paper we consider the anomalous magnetic moment of the muon (g-2){sub {mu}} and the lepton flavor violating decays {mu}{yields}e{gamma} and {tau}{yields}{mu}{gamma} in the little Higgs model with T-parity [A. Goyal, hep-ph/0609095.]. Our results show that the present experimental constraints of {mu}{yields}e{gamma} are a much more useful tool for constraining the new sources of flavor violation, than from the other processes considered here, which are present in T-parity models.},
doi = {10.1103/PHYSREVD.75.055011},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}
  • Taking into account the constraints on the free parameters of the littlest Higgs model with T parity (called the LHT model) from some rare decay processes, such as {mu}{yields}e{gamma} and {mu}{yields}3e, we consider the contributions of the LHT model to the lepton flavor violating (LFV) processes e{sup +}e{sup -}{yields}l{sub i}l{sub j} and {gamma}{gamma}{yields}l{sub i}l{sub j} (i{ne}j). We find that the LHT model can indeed produce significant contributions to these LFV processes and its LFV signal might have a chance of being observed in the future International Linear Collider experiments.
  • Lepton flavor violation in {tau} and {mu} processes is studied in the littlest Higgs model with T parity. We consider various asymmetries defined in polarized {tau} and {mu} decays. Correlations among branching ratios and asymmetries are shown in the following lepton flavor violation processes: {mu}{sup +}{yields}e{sup +}{gamma}, {mu}{sup +}{yields}e{sup +}e{sup +}e{sup -}, {mu}{sup -}A{yields}e{sup -}A (A=Al, Ti, Au, and Pb), {tau}{sup +}{yields}{mu}{sup +}{gamma}, {tau}{sup +}{yields}{mu}{sup +}{mu}{sup +}{mu}{sup -}, {tau}{sup +}{yields}{mu}{sup +}e{sup +}e{sup -}, {tau}{sup +}{yields}{mu}{sup +}P (P={pi}{sup 0}, {eta} and {eta}{sup '}), {tau}{sup +}{yields}{mu}{sup +}V (V={rho}{sup 0}, {omega} and {phi}), {tau}{sup +}{yields}e{sup +}{gamma}, {tau}{sup +}{yields}e{sup +}e{sup +}e{sup -}, {tau}{sup +}{yields}e{supmore » +}{mu}{sup +}{mu}{sup -}, {tau}{sup +}{yields}e{sup +}P, {tau}{sup +}{yields}e{sup +}V, {tau}{sup +}{yields}{mu}{sup +}{mu}{sup +}e{sup -} and {tau}{sup +}{yields}e{sup +}e{sup +}{mu}{sup -}. It is shown that large parity asymmetries and time-reversal asymmetries are allowed in {mu}{sup +}{yields}e{sup +}e{sup +}e{sup -}. For {tau} lepton flavor violation processes, sizable asymmetries are possible reflecting characteristic chirality structure of lepton flavor violating interactions in this model.« less
  • The Little Higgs model with T-parity (LHT) belongs to the non-minimal flavour violating model. This model has new sources of flavour and CP violation both in quark and leptonic sectors. These new sources of flavour violation originates by the interaction of Standard Model (SM) fermions with heavy gauge bosons and heavy (or mirror) fermions. In this work we will present the impact of the new flavour structure of T-parity models on flavour violations in leptonic sector.
  • We analyze flavor constraints in the littlest Higgs model with T-parity. In particular, we focus on neutral meson mixing in the K, B, and D systems due to one loop contributions from T-parity odd fermions and gauge bosons. We calculate the short distance contributions to mixing for a general choice of T-odd fermion Yukawa couplings. We find that for a generic choice of textures, a TeV scale GIM suppression is necessary to avoid large contributions. If order one mixing angles are allowed in the extended flavor structure, the mass spectrum is severely constrained, and must be degenerate at the 1-5%more » level. However, there are still regions of parameter space where only a loose degeneracy is necessary to avoid constraints. We also consider the B(s) system, and identify a scenario in which the mixing can be significantly enhanced beyond the standard model prediction while still satisfying bounds on the other mixing observables. We present both analytical and numerical results as functions of the T-odd fermion mass eigenvalues.« less
  • In this note we examine the constraints imposed by muon anomalous magnetic moment ((g-2){sub {mu}}) and {mu}{sup -}{yields}e{sup +}e{sup -}e{sup -} on lepton number violating (LNV) couplings of the triplet Higgs in Little Higgs (LH) model.