نتایج جستجو برای: violation
تعداد نتایج: 22062 فیلتر نتایج به سال:
Abstract. In the minimal left-right symmetric model with spontaneous CP violation, there are only two intrinsic CP violating phases to account for all CP violation in both the quark and lepton sectors. In addition, the leftand right-handed Majorana mass terms for the neutrinos are proportional to each other due to the parity in the model. This is thus a very constrained framework, making the ex...
This is a written version of a series of three lectures aimed at graduate students in the field of experimental high energy physics. The emphasis is on physics that is relevant to B-factories. The main topics covered are: (i) The flavor sector of the Standard Model; (ii) Determination of the mixing parameters; (iii) CP violation in meson decays (a model independent description); (iv) CP violati...
CP violation in the B-meson system has generated considerable experimental and theoretical interest, as potentially large e ects are expected. Searches for CP(T) violation using the small sample of Z ! b b decays at the LEP collider at CERN provide \proofs of principle" for analysis techniques which will be employed by future B-Factory experiments. Indirect CP violation is possible in the B sys...
We discuss a search for CPT violation in neutral charm meson oscillations. The data come from the Fermilab fixed-target experiment FOCUS. While flavor mixing in the charm sector is predicted to be small by the standard model, it is still possible to investigate CPT violation through study of the proper time dependence of the asymmetry in right-sign decay rates for D0 and D̄0. Using present limit...
■ Abstract Until recently, CP violation had been observed only in kaon decays. In order to conclusively interpret CP violation and test whether it can be explained in the framework of the Cabibbo-Kobayashi-Maskawa matrix, two asymmetric B factories, KEK-B and PEP-II, were constructed in the past decade. Recent measurements with the two detectors at these B factories clearly established large CP...
It is shown that in R-parity violating models of supersymmetry, the CP violation observed in the kaon system could arise purely from the R-parity violating scalar interactions (A-terms), with no CP violation in the CKM matrix. The direct CP violating parameter, ε, could be as large or larger than that expected in the Standard Model. CP violation in the B system however is expected to be negligi...
We present a generalized account of how one might achieve energy conservation violation with quantum coherence effects. The general setup involves a violation of energy conservation by means of a change to the preparation of a coherent quantum mechanical effect which causes a change to the probability distribution of the measurable statistics of an observable. We also present a simple theoretic...
The distributions of the single decay b-quarks and leptons from e+e− → tt̄ assuming CP violation are reviewed. Different asymmetries , sensitive to independently to CP violation in the production and in the decay, and sensitive to the real and imaginary parts of d and d are defined. The analytic expressions are general and independent on the model of CP violation. In most of them all phase space...
We study whether the individual violation of the lepton numbers Le,μ,τ in the charged sector can lead to measurable rates for BR(μ → eγ) and BR(τ → μγ). We consider three different scenarios, the fist one corresponds to the Minimal Supersymmetric Standard Model with non–universal soft terms. In the other two cases the violation of flavor in the leptonic charged sector is associated to the neutr...
I will discuss three related unconventional ways to generate neutrino oscillations:(1)Equivalence principle violation by the string dilaton field (2) Violation of Lorentz Invariance and (3)Equivalence principle violation through a non-universal tensor neutrino-gravity coupling. These unorthodox oscillation mechanisms are shown to be viable at the level of our present experimental knowledge and ...
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