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Title: Lightest Higgs boson and relic neutralino in the MSSM with CP violation

Abstract

We discuss the lower bound to the lightest Higgs boson H{sub 1} in the minimal supersymmetric extension of the standard model with explicit CP violation, and the phenomenology of the lightest relic neutralino in the same scenario. In particular, adopting the CPX benchmark scenario, we find that the combination of experimental constraints coming from LEP, thallium electric dipole moment measurements, quarkonium decays, and B{sub s}{yields}{mu}{mu} decay favors a region of the parameter space where the mass of H{sub 1} is in the range 7 GeV < or approx. M{sub H{sub 1}} < or approx. 10 GeV, while 3 < or approx. tan{beta} < or approx. 5. Assuming a departure from the usual grand unified theory relation among gaugino masses (|M{sub 1}|<<|M{sub 2}|), we find that through resonant annihilation to H{sub 1} a neutralino as light as 2.9 GeV can be a viable dark matter candidate in this scenario. We call this the CPX light neutralino scenario and discuss its phenomenology showing that indirect dark matter searches are compatible with the present experimental constraints, as long as m{sub {chi}}< or approx. M{sub H{sub 1/2}}. On the other hand, part of the range m{sub {chi}} > or approx. M{sub H{sub 1/2}} whichmore » is allowed by cosmology is excluded by antiproton fluxes.« less

Authors:
 [1];  [2]
  1. Center of Theoretical Physics, School of Physics, Seoul National University, Seoul, 151-747 (Korea, Republic of)
  2. Korea Institute for Advanced Study, Seoul 130-722 (Korea, Republic of)
Publication Date:
OSTI Identifier:
21020295
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.075001; (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; ANNIHILATION; ANTIPROTONS; B S MESONS; BENCHMARKS; COSMOLOGY; CP INVARIANCE; ELECTRIC DIPOLE MOMENTS; GEV RANGE; HIGGS BOSONS; LEP STORAGE RINGS; MUONS; NONLUMINOUS MATTER; PARTICLE DECAY; QUARKONIUM; REST MASS; SPARTICLES; STANDARD MODEL; SUPERSYMMETRY

Citation Formats

Lee, Jae Sik, and Scopel, Stefano. Lightest Higgs boson and relic neutralino in the MSSM with CP violation. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.075001.
Lee, Jae Sik, & Scopel, Stefano. Lightest Higgs boson and relic neutralino in the MSSM with CP violation. United States. doi:10.1103/PHYSREVD.75.075001.
Lee, Jae Sik, and Scopel, Stefano. Sun . "Lightest Higgs boson and relic neutralino in the MSSM with CP violation". United States. doi:10.1103/PHYSREVD.75.075001.
@article{osti_21020295,
title = {Lightest Higgs boson and relic neutralino in the MSSM with CP violation},
author = {Lee, Jae Sik and Scopel, Stefano},
abstractNote = {We discuss the lower bound to the lightest Higgs boson H{sub 1} in the minimal supersymmetric extension of the standard model with explicit CP violation, and the phenomenology of the lightest relic neutralino in the same scenario. In particular, adopting the CPX benchmark scenario, we find that the combination of experimental constraints coming from LEP, thallium electric dipole moment measurements, quarkonium decays, and B{sub s}{yields}{mu}{mu} decay favors a region of the parameter space where the mass of H{sub 1} is in the range 7 GeV < or approx. M{sub H{sub 1}} < or approx. 10 GeV, while 3 < or approx. tan{beta} < or approx. 5. Assuming a departure from the usual grand unified theory relation among gaugino masses (|M{sub 1}|<<|M{sub 2}|), we find that through resonant annihilation to H{sub 1} a neutralino as light as 2.9 GeV can be a viable dark matter candidate in this scenario. We call this the CPX light neutralino scenario and discuss its phenomenology showing that indirect dark matter searches are compatible with the present experimental constraints, as long as m{sub {chi}}< or approx. M{sub H{sub 1/2}}. On the other hand, part of the range m{sub {chi}} > or approx. M{sub H{sub 1/2}} which is allowed by cosmology is excluded by antiproton fluxes.},
doi = {10.1103/PHYSREVD.75.075001},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}