Indirect CP violation in the B-system
نویسندگان
چکیده
منابع مشابه
Indirect Cp Violation in the B - System
We show that, contrary to the flavour mixing amplitude q/p, both Re(ε) and Im(ε) are observable quantities, where ε is the phase-convention-independent CP mixing. We consider semileptonic B d decays from a CP tag and build appropriate time-dependent asymmetries to separate out Re(ε) and Im(ε). " Indirect " CP violation would have in Im(ε)/(1 + |ε| 2) its most prominent manifestation in the B-sy...
متن کاملCP violation in the B system.
The phenomenon of CP violation is crucial to understand the asymmetry between matter and antimatter that exists in the Universe. Dramatic experimental progress has been made, in particular in measurements of the behaviour of particles containing the b quark, where CP violation effects are predicted by the Kobayashi-Maskawa mechanism that is embedded in the standard model. The status of these me...
متن کاملIndirect Violation of CP , T and CPT in the B d - system 1
The problem of indirect violation of discrete symmeties CP, T and CPT in a neutral meson system can be described using two complex parameters ε and δ, which are invariant under rephasing of meson and quark fields. For the B d system, where the width difference between the physical states is negligible, only Re(δ) and Im(ε) survive. As a consequence, the traditional observables constructed for k...
متن کاملCp Violation in B
We consider CP violating effects in decays of the type B ± → γa ± 1,2 where a 1,2 are the J P = 1 + and 2 + resonances each decaying to the common final state via a ± 1,2 → π ± ρ 0. The resonances enhance the CP asymmetries and also knowledge of their masses and widths facilitates calculations of the effects. Several types of CP asymmetries are sizable (∼ 10–30%) requiring about (3–10) × 10 8 B...
متن کاملCP Violation in B
The B0 s meson is a bound state of b and s type quarks. A CP violation parameter, βs, of that system is the analogue of the parameter β measured precisely at the B factories in B0 decays. The standard model predicts, robustly and precisely, a value of βs which is very close to zero. The CDF and D0 experiments now have about 2000 fully reconstructed and flavor-tagged B0 s → J/ψφ decays each, wit...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)00115-4