Flavoured soft leptogenesis
نویسندگان
چکیده
منابع مشابه
Flavoured Soft Leptogenesis
We study the impact of flavour in “soft leptogenesis” (leptogenesis induced by soft supersymmetry breaking terms). We address the question of how flavour effects can affect the region of parameters in which successful soft leptogenesis induced by CP violation in the right-handed sneutrino mixing is possible. We find that for decays which occur in the intermediate to strong washout regimes for a...
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We study “soft leptogenesis”, a new mechanism of leptogenesis which does not require flavour mixing among the right-handed neutrinos. Supersymmetry softbreaking terms give a small mass splitting between the CP-even and CP-odd righthanded sneutrino states of a single generation and provide a CP-violating phase sufficient to generate a lepton asymmetry. The mechanism is successful if the leptonvi...
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Successful soft leptogenesis requires small B-terms for the right-handed sneutrinos and a large CP violating phase between the Aand B-terms. We show that this situation is realized naturally within the framework of gauge mediated supersymmetry breaking. The A-term is dominated by contribution from gauge mediation, while supergravity effects are more important for the B-term. The different origi...
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Soft supersymmetry breaking terms involving heavy singlet sneutrinos can be the dominant source of leptogenesis. The relevant range of parameters is different from standard leptogenesis: a lighter Majorana mass, M . 10 GeV (allowing a solution of the gravitino problem), and smaller Yukawa couplings, YN . 10 . We investigate whether the various couplings of the singlet sneutrinos, which are cons...
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Yuval Grossman, 2, 3, ∗ Tamar Kashti, † Yosef Nir, ‡ and Esteban Roulet § Department of Physics, Technion–Israel Institute of Technology, Technion City, 32000 Haifa, Israel Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, CA 95064 Department of Particle Physics, Weizmann Institute of Scie...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2008
ISSN: 1029-8479
DOI: 10.1088/1126-6708/2008/06/076