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Available from: Paolo Valente, Jun 19, 2015
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    ABSTRACT: We consider the νMSM which is an extension of the Standard Model by three right-handed neutrinos with masses below the electroweak scale, in which the origins of neutrino masses, dark matter, and baryon asymmetry of the universe are simultaneously explained. Among three heavy neutral leptons, and , which are responsible to the seesaw mechanism of active neutrino masses and the baryogenesis via flavor oscillation, can induce sizable contributions to various lepton universality in decays of charged mesons. Then the possible deviations of the universality in the νMSM are investigated. We find that the deviation in kaon decay can be as large as , which will be probed in near future experiments.
    Physics Letters B 03/2015; 742. DOI:10.1016/j.physletb.2015.01.049 · 6.02 Impact Factor
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    ABSTRACT: A brief review of recent discrete symmetry tests with kaons is presented, and prospects for future studies are discussed.
    Journal of Physics Conference Series 12/2011; 335(1). DOI:10.1088/1742-6596/335/1/012002
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    ABSTRACT: The low-energy manifestations of a minimal extension of the electroweak standard model based on the quark-lepton symmetry $SU(4)_V \otimes SU(2)_L \otimes G_R$ of the Pati--Salam type are analyzed. Given this symmetry the third type of mixing in the interactions of the $SU(4)_V$ leptoquarks with quarks and leptons is shown to be required. An additional arbitrariness of the mixing parameters could allow, in principle, to decrease noticeably the lower bound on the vector leptoquark mass originated from the low-energy rare processes, strongly suppressed in the standard model.
    International Journal of Modern Physics A 03/2012; 27(11). DOI:10.1142/S0217751X12500625 · 1.09 Impact Factor