989 resultados para 160-965A
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von H. Graetz
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von H. Graetz
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The production rate of right-handed neutrinos from a Standard Model plasma at a temperature above a hundred GeV has previously been evaluated up to NLO in Standard Model couplings (g ~ 2/3) in relativistic (M ~ πT) and non-relativistic regimes (M ≫ πT), and up to LO in an ultrarelativistic regime (M ≲ gT). The last result necessitates an all-orders resummation of the loop expansion, accounting for multiple soft scatterings of the nearly light-like particles participating in 1↔2 reactions. In this paper we suggest how the regimes can be interpolated into a result applicable for any right-handed neutrino mass and at all temperatures above 160GeV. The results can also be used for determining the lepton number washout rate in models containing right-handed neutrinos. Numerical results are given in a tabulated form permitting for their incorporation into leptogenesis codes. We note that due to effects from soft Higgs bosons there is a narrow intermediate regime around M ~g 1/2 T in which our interpolation is phenomenological and a more precise study would be welcome.
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unter Mitw. bewährter Fachmänner hrsg. von M. Ehrentheil
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Vorbesitzer: Eljāqīm Carmoly; Abraham Merzbacher
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Vorbesitzer: Bartholomaeusstift Frankfurt am Main
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u.a.: Umzug aus gesundheitlichen Gründen nach Naumburg oder Erfurt; Einschreiten der Polizei in Frankfurt am Main; Eisenbahn Thüringen; Höhe der Miete in Berlin, Beschreibung Berliner Wohnung; Wielandt; Geheimer Hofrat Carl John;
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Vorbesitzer: Dominikanerkloster Frankfurt am Main
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Deutsche Latern: Abrechnung
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von Adolph Büchler