نتایج جستجو برای: flavor enhancer
تعداد نتایج: 39493 فیلتر نتایج به سال:
The oscillation frequency of B0-B0 mixing (∆md) has been measured using 29.1 fb −1 of data collected with the Belle detector at KEKB. This measurement is made through the distributions of the proper decay time difference of B pairs in events tagged as sameand opposite-flavor decays. In each event, one B is fully reconstructed in a flavor-specific hadronic decay mode, while the flavor of the oth...
It is shown that it is possible to construct an infinity of Fock spaces of flavor neutrinos depending on arbitrary unphysical mass parameters, in agreement with the theory of Blasone and Vitiello in the version proposed by Fujii, Habe and Yabuki. However, we show that these flavor neutrino Fock spaces are clever mathematical constructs without physical relevance, because the hypothesis that neu...
Supersymmetric theories involving a spontaneously broken flavor symmetry can solve the flavor-changing problem while having quark and lep-ton masses derived from both F and D terms. As an example, a theory of leptons is constructed in which holomorphy constrains the electron to be massless at tree level. The electron flavor symmetries are broken by D terms, leading to flavor mixing in the slept...
Using the simian virus 40 "enhancer trap" approach, we have identified a transcription enhancer located just upstream of the major immediate early gene of murine cytomegalovirus. This enhancer has several striking properties. (i) Together with the enhancer of human cytomegalovirus, it is the strongest transcription enhancer found to date. (ii) It is an extremely long enhancer, spanning greater ...
In the light of the recent measurement of the muon anmalous magnetic moment aμ by the Muon (g − 2) Collaboration, we examine the contribution to aμ from the exchange of flavor changing scalars. Assuming that the heavier generations have larger flavor changing couplings, we obtain a bound on μ−τ Yukawa coupling for a given scalar mass. Constraints on other flavor changing/conserving couplings ar...
The flavor composition of high-energy astrophysical neutrinos can reveal the physics governing their production, propagation, and interaction. The IceCube Collaboration has published the first experimental determination of the ratio of the flux in each flavor to the total. We present, as a theoretical counterpart, new results for the allowed ranges of flavor ratios at Earth for arbitrary flavor...
The study for lepton flavor violation combined with the neutrino oscillation may provide more information about the lepton flavor structure of the grand unified theory. In this paper, we study two lepton flavor violation processes , τ → μγ and Z → τμ, in the context of supersymmetric SO(10) grand unified models. We find the two processes are both of phenomenological interest. In particular the ...
We discuss the fermion mass hierarchy and the flavor mixings in the fat brane scenario of five dimensional SUSY theory. The decoupling solution of the sfermion mass spectrum can be realized by introducing the vectorlike mirror fields in an extra dimension. In this scenario, both the leftand right-handed sleptons can have sizable flavor mixings. We point out that this sizable flavor mixings can ...
A U (2) flavor symmetry can successfully describe the charged fermion masses and mixings, and supress SUSY FCNC processes, making it a viable candidate for a theory of flavor. We show that a direct application of this U (2) flavor symmetry automatically predicts a mixing of 45 o for ν µ ⇒ ν s , where ν s is a light, right-handed state. The introduction of an additional flavor symmetry acting on...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید