Neutrino Fluxes from NUHM LSP Annihilations in the Sun

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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 non-universal 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, ... continued below

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22 pages

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Ellis, John; London, /CERN /King's Coll.; Olive, Keith A.; /SLAC, /Minnesota U.; Savage, Christopher; /Stockholm U., OKC et al. August 12, 2011.

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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 non-universal 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.

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22 pages

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  • Journal Name: Phys.Rev.D83:085023,2011; Journal Volume: 83; Journal Issue: 8

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  • Report No.: SLAC-PUB-14372
  • Grant Number: AC02-76SF00515
  • DOI: 10.1103/PhysRevD.83.085023 | External Link
  • Office of Scientific & Technical Information Report Number: 1022562
  • Archival Resource Key: ark:/67531/metadc840595

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 12, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Dec. 7, 2016, 6:11 p.m.

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Ellis, John; London, /CERN /King's Coll.; Olive, Keith A.; /SLAC, /Minnesota U.; Savage, Christopher; /Stockholm U., OKC et al. Neutrino Fluxes from NUHM LSP Annihilations in the Sun, article, August 12, 2011; United States. (digital.library.unt.edu/ark:/67531/metadc840595/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.