Neutrino fluxes from nonuniversal Higgs mass LSP annihilations in the Sun

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.085023· OSTI ID:21541543

Ellis, John ^[1]; Olive, Keith A ^[2]; Savage, Christopher ^[3]; Spanos, Vassilis C ^[4]

---

1. TH Division, Physics Department, CERN, 1211 Geneva 23, Switzerland and Theoretical Physics and Cosmology Group, Department of Physics, King's College London, London WC2R 2LS (United Kingdom)
2. William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States) and Department of Physics and SLAC, Stanford University, Palo Alto, California 94305 (United States)
3. Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, AlbaNova, SE-10691 Stockholm (Sweden)
4. Institute of Nuclear Physics, NCSR 'Demokritos', GR-15310 Athens (Greece)

We extend our previous studies of the neutrino fluxes expected from neutralino LSP annihilations inside the Sun to include variants of the minimal supersymmetric extension of the Standard Model (MSSM) with squark, slepton and gaugino masses constrained to be universal at the GUT scale, but allowing one or two nonuniversal supersymmetry breaking parameters contributing to the Higgs masses (NUHM1,2). As in the constrained MSSM (CMSSM) with universal Higgs masses, there are large regions of the NUHM parameter space where the LSP density inside the Sun is not in equilibrium, so that the annihilation rate may be far below the capture rate, and there are also large regions where the capture rate is not dominated by spin-dependent LSP-proton scattering. The spectra possible in the NUHM are qualitatively similar to those in the CMSSM. We calculate neutrino-induced muon fluxes above a threshold energy of 10 GeV, appropriate for the IceCube/DeepCore detector, for points where the NUHM yields the correct cosmological relic density for representative choices of the NUHM parameters. We find that the IceCube/DeepCore detector can probe regions of the NUHM parameter space in addition to analogues of the focus point strip and the tip of the coannihilation strip familiar from the CMSSM. These include regions with enhanced Higgsino-gaugino mixing in the LSP composition, that occurs where neutralino mass eigenstates cross over. On the other hand, rapid-annihilation funnel regions in general yield neutrino fluxes that are unobservably small.

• OSTI ID: 21541543
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 8; Other Information: DOI: 10.1103/PhysRevD.83.085023; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
DENSITY
EIGENSTATES
EQUILIBRIUM
HIGGS BOSONS
HIGGS MODEL
MASS
MUONS
NEUTRINOS
PROTONS
SCATTERING
SPECTRA
SPIN
STANDARD MODEL
SUN
SUPERSYMMETRY
SYMMETRY BREAKING
THRESHOLD ENERGY
ANGULAR MOMENTUM
BARYONS
BOSONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
INTERACTIONS
LEPTONS
MAIN SEQUENCE STARS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
STARS
SYMMETRY
UNIFIED GAUGE MODELS