J/ΨKS in the Standard Model
نویسندگان
چکیده
We study the corrections to the determination of sin(2β) from the time dependent CP asymmetry of B → J/ΨKS which arise in the standard model. Although a precise prediction of these corrections is not possible we find that they are indeed extremely small, of the order of less than a per mil of the observed value. This means in turn that any deviation visible at the B factories will be a clear signal for new physics. [email protected] [email protected] [email protected]
منابع مشابه
Futher Study of CP Violation and Branching Ratios for B̄ 0 → J / ψK s and B̄ 0 → φK s in the Standard Model and Beyond ∗
In this work we study the CP violation for B̄ → J/ψKs and B̄ → φKs up to leading and next-to-leading order QCD corrections in the standard model, two-Higgsdoublet model and the minimal supersymmetric extension of the standard model. We also study the effect of new physics on the branching ratios of these two decay modes. We find that within the parameter space constrained by the observation of th...
متن کاملIndication of New Physics in B→ΦKs Decays at the BELLE Experiment
The BELLE experiment at the asymmetric e+e− (3.5 GeV and 8 GeV) accelerator KEK-B at Tsukuba, Japan, has recorded 152 Million BB meson pairs in 4 years of data taking. In the standard model, the size of CP violation in the B meson system is characterized by a quantity called sin(2φ1), in which φ1 denotes one of the angles in the unitarity triangle. This quantity was determined precisely to be s...
متن کاملImplications of Non-Standard CP Violation in Hadronic B-Decays
We investigate a class of models for new physics which could produce a large difference in sin 2β between B0 → J/ψKS and the “pure penguin” mode B0 → φKS . In such models, the dominant effect is through a Z-penguin and therefore a pattern of deviation in sin 2β as measured in B0 → χ1KS ; ηcKS ; J/ψKS and ψKS is predicted. If the preliminary data concerning the discrepancy between J/ψKS and φKS ...
متن کاملSupersymmetry and a rationale for small CP violating phases
We analyse the CP problem in the context of a supersymmetric extension of the standard model with universal strength of Yukawa couplings. A salient feature of these models is that the CP phases are constrained to be very small by the hierarchy of the quark masses, and the pattern of CKM mixing angles. This leads to a small amount of CP violation from the usual KM mechanism and a significant con...
متن کاملConstraining SUSY Models with Spontaneous CP-Violation via B → ψKs
We study CP-violating effects in B → ψKs decay within minimal supersymmetric models with spontaneous CP-violation. We find that the CP-asymmetry predicted by the Standard Model in this decay, sin 2β ≥ 0.4, cannot be accommodated in these models without violating the bound on the neutron electric dipole moment. This result holds for NMSSM-like models with an arbitrary number of sterile superfiel...
متن کامل