Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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Access type: Open accessAuthor: search.filters.author.Everett, Lisa L.

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  • Article
    Citation - WoS: 24
    Citation - Scopus: 25
    Sneutrino Dark Matter: Symmetry Protection and Cosmic Ray Anomalies
    (American Physical Society, 2010) Demir, Durmuş Ali; Demir, Durmuş Ali; Frank, Mariana; Selbuz, Levent; Turan, İsmail; 04.05. Department of Pyhsics; 04. Faculty of Science; 01. Izmir Institute of Technology
    We present an R-parity conserving model of sneutrino dark matter within a Higgsphilic U(1)′ extension of the minimal supersymmetric standard model. In this theory, the μ parameter and light Dirac neutrino masses are generated naturally upon the breaking of the U(1)′ gauge symmetry. One of the right-handed sneutrinos is the lightest supersymmetric particle. The leptonic and hadronic decays of another sneutrino, taken to be the next-to-lightest superpartner, allow for a natural fit to the recent results reported by the PAMELA experiment. We perform a detailed calculation of the dark matter relic density in this scenario, and show that the model is consistent with the ATIC and Fermi LAT experiments. © 2010 The American Physical Society.
  • Article
    Citation - WoS: 35
    Citation - Scopus: 37
    Dirac Neutrino Masses From Generalized Supersymmetry Breaking
    (American Physical Society, 2008) Demir, Durmuş Ali; Demir, Durmuş Ali; Langacker, Paul; 04.05. Department of Pyhsics; 04. Faculty of Science; 01. Izmir Institute of Technology
    We demonstrate that Dirac neutrino masses in the experimentally preferred range are generated within supersymmetric gauge extensions of the standard model with a generalized supersymmetry breaking sector. If the superpotential neutrino Yukawa terms are forbidden by the gauge symmetry [such as a U(1)′], sub-eV scale effective Dirac mass terms can arise at tree level from hard supersymmetry breaking Yukawa couplings, or at one loop due to nonanalytic soft supersymmetry breaking trilinear scalar couplings. The radiative neutrino magnetic and electric dipole moments vanish at one-loop order.