Tree-level flavor-changing neutral currents (FCNC) are characteristic of models with extra vectorlike quarks. These new couplings can strongly modify the B{sup 0} CP asymmetries without conflicting ...with low-energy constraints. In the light of low CP asymmetry in B{r_arrow}J/{psi} K{sub S}, we discuss the implications of these contributions. We find that even these low values can be easily accommodated in these models. Furthermore, we show that the new data from B factories tend to favor an O(20) enhancement of the b{r_arrow}dl{bar l} transition over the SM expectation.
Neutrinos are one of the most promising messengers for signals of new physics Beyond the Standard Model (BSM). On the theoretical side, their elusive nature, combined with their unknown mass ...mechanism, seems to indicate that the neutrino sector is indeed opening a window to new physics. On the experimental side, several long-standing anomalies have been reported in the past decades, providing a strong motivation to thoroughly test the standard three-neutrino oscillation paradigm. In this Snowmass21 white paper, we explore the potential of current and future neutrino experiments to explore BSM effects on neutrino flavor during the next decade.
Risk control under emergency oil spills requires establishing rapidly the fact of oil release in water bodies, estimating the volume of spilled oil, localizing and shifting the resulting pollution, ...as well as predicting the dangerous influence of oil spills on a biota and population. This paper proposes a detection system for the above-mentioned characteristics of oil spills, which includes contact and remote sensors and employs bioinformation technologies for predicting the toxicity of individual hydrocarbons as oil components.
We analyze the mixing induced
CP asymmetry in the decay
b →
sγ in the left-right symmetric model with spontaneous
CP. This model possesses the useful property that all the
CP-violating observables ...can be expressed in term of a single phase, a ratio of scalar vevs, quark masses and weak mixing angles but not on unconstrained quantities such as Yukawa coupling or additional phases. The calculated
CP asymmetry can be much larger than in the Standard Model.
Production of a single doubly charged Higgs boson
Δ
−− in polarized
e
+
e
− and
e
+
γ collision modes of the linear collider have been investigated. The mass range of
Δ
−− to be probed extends up to ...the collision energy. The diagonal lepton number violating Yukawa coupling
h
ee
will be tested at least three orders of magnitude more strictly than in present experiments.
In this work we analyze a new piece present in the
ΔF=2 effective Lagrangian in models with extra vector-like quarks. This piece, which was not taken into account previously, is required in order to ...preserve gauge invariance once the unitarity of the CKM matrix is lost. We illustrate the effects of this new piece in both, CP conserving and CP violating processes.
Any local relativistic quantum field theory of Dirac–Weyl fermions conserves CPT. Here we examine whether a simple nonlocal field theory can violate CPT. We construct a new relativistic field theory ...of fermions, which we call “homeotic”, which is nonlocal but causal and Lorentz invariant. The free homeotic theory is in fact equivalent to free Dirac theory. We show that a homeotic theory with a suitable nonlocal four-fermion interaction is causal and as a result has a well-defined perturbative S-matrix. By coupling a right-handed homeotic fermion to a left-handed Dirac–Weyl fermion, we obtain a causal theory of CPT-violating neutrino oscillations.
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