0 v 1 1 7 M ar 1 99 5 OITS - 572 HADRONIC PENGUINS IN B DECAYS AND EXTRACTION OF α , β AND γ
نویسنده
چکیده
Electroweak penguin operators become important when m t ≈ 174 GeV. We discuss their implications for measuring CP violating phases α, β and γ.
منابع مشابه
v 1 1 4 O ct 1 99 6 TTP 96 - 49 hep - ph / 9610357 October 1996 Penguin Zoology in B → ππ and the Extraction of the CKM Angle α
We reanalyze the decay Bd → π+π− without assuming dominance of QCD penguins with internal top-quark exchanges. In that case the weak phase of the b̄ → d̄ QCD penguin amplitude is not related in a simple way to the CKM angle β. Nevertheless it is still possible to extract the CKM angle α in a transparent and almost modelindependent way from the time-dependent CP-violating asymmetry of the transiti...
متن کاملep - p h / 96 04 33 6 v 1 1 6 A pr 1 99 6 OITS - 598 Remarks on a Technique of Measuring CP phase α
We present a method to measure the CKM phase α and the tree and penguin (strong and electroweak) amplitudes in B → ππ decays, based on isospin consideration and the weak assumption that all tree amplitudes have a common strong phase and all penguin amplitudes have a different common phase. The method needs only the time-independent measurements of the relevant decay rates in B → ππ. We also pro...
متن کاملDetermining the Phases α and γ from Direct CP Violation in B u , B d and B s Decays to Two Vectors
A method for clean determination of the unitarity angles α and γ is proposed that uses only direct CP violation and does not require any time dependent measurements. The method takes advantage of helicity amplitudes for Bu, Bd and Bs decay to two vector mesons and can be used, at any B-facility, in conjunction with a large number of modes. It also allows for experimental tests of theoretical ap...
متن کاملTowards the Control over Electroweak Penguins in Nonleptonic B - Decays ∗ Andrzej
We present strategies for determining electroweak penguins from experimental data. Using the CKM-angle γ as one of our central inputs and making some reasonable approximations, we show that the b̄ → s̄ electroweak penguin amplitude can be determined in a two-step procedure involving i) BR(B → πK), BR(B− → π0K−), BR(B → πK) and ii) either BR(B d → π −K+), BR(B̄ d → π +K−) or aCP(t) of the mode Bs →...
متن کاملM ar 1 99 8 B 0 d ( t ) → DPP time - dependent Dalitz plots , CP - violating angles 2 β , 2 β + γ , and discrete ambiguities
B 0 d (t) → DP P time-dependent Dalitz plots, CP-violating angles 2β, 2β + γ, and discrete ambiguities Abstract We study CP-violation in resonant three-body B d → DP P decays, where P P stands for either ¯ Dπ, ¯ DK S , ππ or πK S. Analogously to the B d → 3π channel and the extraction of 2α, the first three channels are shown to measure cos 2β in addition to sin 2β, thus allowing to resolve the...
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 1995