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Decay constants of heavy meson of <sup>0−</sup> state in relativistic Salpeter method
Cvetič,, G.,Kim, C.S.,Wang, Guo-Li,Namgung, Wuk Elsevier 2004 Physics letters: B Vol.596 No.1
<P><B>Abstract</B></P><P>The decay constants of pseudoscalar heavy mesons of <SUP>0−</SUP> state are computed by means of the relativistic (instantaneous) Salpeter equation. We solved the full Salpeter equation without making any further approximation, such as ignoring the small component wave function. Therefore, our results for the decay constants include the complete relativistic contributions from the light and the heavy quarks. We obtain <SUB>F<SUB>Ds</SUB></SUB>≈248±27, <SUB>FD</SUB>≈230±25(<SUP>D0</SUP>,<SUP>D±</SUP>), <SUB>F<SUB>Bs</SUB></SUB>≈216±32, <SUB>FB</SUB>≈196±29(<SUP>B0</SUP>,<SUP>B±</SUP>), <SUB>F<SUB>Bc</SUB></SUB>≈322±42 and <SUB>F<SUB>ηc</SUB></SUB>≈292±25 MeV.</P>
Chun, E. J.,Cvetič,, G.,Dev, P. S. B.,Drewes, M.,Fong, C. S.,Garbrecht, B.,Hambye, T.,Harz, J.,Herná,ndez, P.,Kim, C. S.,Molinaro, E.,Nardi, E.,Racker, J.,Rius, N.,Zamora-Saa, J. World Scientific Publishing Company 2018 International journal of modern physics. A, Partic Vol.33 No.6
<P>The focus of this paper lies on the possible experimental tests of leptogenesis scenarios. We consider both leptogenesis generated from oscillations, as well as leptogenesis from out-of-equilibrium decays. As the Akhmedov-Rubakov-Smirnov (ARS) mechanism allows for heavy neutrinos in the GeV range, this opens up a plethora of possible experimental tests, e.g. at neutrino oscillation experiments, neutrinoless double beta decay, and direct searches for neutral heavy leptons at future facilities. In contrast, testing leptogenesis from out-of-equilibrium decays is a quite difficult task. We comment on the necessary conditions for having successful leptogenesis at the TeV-scale. We further discuss possible realizations and their model specific testability in extended seesaw models, models with extended gauge sectors, and supersymmetric leptogenesis. Not being able to test high-scale leptogenesis directly, we present a way to falsify such scenarios by focusing on their washout processes. This is discussed specifically for the left-right symmetric model and the observation of a heavy <TEX>$ W_{R}$</TEX>, as well as model independently when measuring <TEX>$ \Updelta L = 2$</TEX> washout processes at the LHC or neutrinoless double beta decay.</P>