Supersymmetric origin of a low a J / ψ CP asymmetry
نویسندگان
چکیده
We show that general Minimal Supersymmetric extensions of the Standard Model (MSSM) allow for a CP asymmetry in B → J/ψK S well below the SM expectations with dominant Supersymmetric contributions to ε K and ε ′ /ε. Indeed, we provide an explicit example of an MSSM with non–universal soft breaking terms fully consistent with the low results of this asymmetry recently announced by Babar and Belle collaborations.
منابع مشابه
On supersymmetric contributions to the CP asymmetry of the B → φK
We analyse the CP asymmetry of the B → φK S process in general supersymmetric models. In the framework of the mass insertion approximation, we derive model independent limits for the mixing CP asymmetry. We show that chromomagnetic type of operator may play an important role in accounting for the deviation of the mixing CP asymmetry between B → φK S and B → J/ψK S processes observed by Belle an...
متن کاملMore on direct CP violation in b → dJ / ψ decays João
Direct CP violation can occur inB-meson decays of the type b→ dcc̄, where the charm-anticharm pair forms a J/ψ. The CP asymmetry requires the contribution to the amplitude from decays into other states, which rescatter into dJ/ψ via final state interactions. In particular, states with the same quark content as dJ/ψ can contribute. A perturbative calculation, based on a quark level description of...
متن کاملAsymmetry Measurements in J / ψ K 0 and the CKM Paradigm
Recent experimental observations of CP asymmetry inB → J/ψ + K constitute the first significant signal of CP violation outside the neutral kaon system; thus they represent an important milestone to test the CKM paradigm. We, therefore, undertake a critical appraisal of the existing experimental and theoretical inputs used to deduce constraints on sin 2β and other important parameters and thus f...
متن کاملNew source for electroweak baryogenesis in the minimal supersymmetric standard model.
One of the most experimentally testable explanations for the origin of the baryon asymmetry of the Universe is that it was created during the electroweak phase transition, in the minimal supersymmetric standard model. Previous efforts have focused on the current for the difference of the two Higgsino fields, H1-H2, as the source of biasing sphalerons to create the baryon asymmetry. We point out...
متن کاملN ov 2 00 4 Supersymmetric contributions to the CP asymmetry of the B → φK S and B → η ′ K
We analyse the CP asymmetry of the B → φKS and B → η′KS processes in general supersymmetric models. We consider both gluino and chargino exchanges in a model independent way by using the mass insertion approximation method. We adopt the QCD factorization method for evaluating the corresponding hadronic matrix elements. We show that chromomagnetic type of operator may play an important role in a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000