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Indirect detection signals beyond the simplest supersymmetric dark matter


Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/21068

Indirect detection signals beyond the simplest supersymmetric dark matter

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dc.contributor.author Richardson, Katherine
dc.date.accessioned 2012-08-28T17:12:26Z
dc.date.available 2012-08-28T17:12:26Z
dc.date.issued 2012-08-28
dc.date.submitted July 2012
dc.identifier.uri http://hdl.handle.net/1928/21068
dc.description.abstract Indirect detection of gamma rays, neutrinos and charged cosmic rays from dark matter annihilation sheds light on the identity of dark matter and compliments direct detection and collider dark matter searches. By testing for the annihilation rate as well as the elastic scattering cross section of dark matter and nucleons, indirect detection can probe beyond the standard neutralino dark matter candidate. In particular, annihilation product phenomenology is a tool for the exploration of the dark matter connection to the neutrino sector. The well-motivated U(1)_{B-L} extension of the Minimal Supersymmetric Model (MSSM) naturally includes the neutrino sector to explain neutrino masses and mixings. Two new B-L dark matter candidates arise: the right-handed sneutrino and a new neutralino. These each annihilate preferentially into leptons by virtue of the B-L charges. Chapters 3 and 4 show that the annihilation cross-section in either case can achieve a Sommerfeld enhancement that fits data from the PAMELA satellite showing an excess in the positron fraction but no excess in the antiproton spectrum. Chapter 5 demonstrates that the IceCube neutrino telescope can distinguish the annihilation of the right-handed sneutrino candidate into monochromatic neutrinos. In general, final states provide a distinctive signature that can discriminate among classes of dark matter models. Chapter 6 considers a model-independent study of monochromatic neutrino signals. Even with the current energy reconstruction capability, IceCube/DeepCore can detect gauge boson or tau annihilation even in the presence of monochromatic neutrino annihilation given ten years of data. Finally, tau regeneration is found to be a potential mechanism for differentiating neutrino flavor final states from one another. en_US
dc.description.sponsorship New Mexico Space Grant, Institute of Geophysics and Planetary Physics at Los Alamos National Laboratory Grant en_US
dc.language.iso en_US en_US
dc.subject Dark matter en_US
dc.subject Indirect detection en_US
dc.subject Neutrinos en_US
dc.subject Sneutrinos en_US
dc.subject.lcsh Dark matter (Astronomy)--Measurement.
dc.subject.lcsh Annihilation reactions.
dc.subject.lcsh Elastic cross sections.
dc.subject.lcsh Neutrinos.
dc.subject.lcsh Supersymmetry.
dc.title Indirect detection signals beyond the simplest supersymmetric dark matter en_US
dc.type Dissertation en_US
dc.description.degree Physics en_US
dc.description.level Doctoral en_US
dc.description.department University of New Mexico. Dept. of Physics & Astronomy en_US
dc.description.advisor Allahverdi, Rouzbeh
dc.description.committee-member Friedland, Alexander
dc.description.committee-member Fulghum, Julia
dc.description.committee-member Gold, Michael
dc.description.committee-member Loomba, Dinesh
dc.description.committee-member Roy, Mousumi

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