Flavour Symmetry and Clean Strategies to Extract γ

نویسنده

  • Robert Fleischer
چکیده

One of the key elements in the testing of the Standard-Model description of CP violation through B-meson decays is the direct determination of the angle γ of the unitarity triangle in a variety of ways. We give a brief overview of the implications of the current B-factory data for flavour-symmetry strategies, and discuss new, theoretically clean methods employing pure tree decays of neutral Bd,s mesons. Invited talk at the Workshop on the CKM Unitarity Triangle, Durham, United Kingdom, 5–9 April 2003 To appear in the Proceedings (SLAC eConf service) CERN-TH/2003-141 June 2003 Workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003 CKM03 Flavour Symmetry and Clean Strategies to Extract γ R Fleischer Theory Division, CERN, CH-1211 Geneva 23, Switzerland One of the key elements in the testing of the Standard-Model description of CP violation through B-meson decays is the direct determination of the angle γ of the unitarity triangle in a variety of ways. We give a brief overview of the implications of the current B-factory data for flavour-symmetry strategies, and discuss new, theoretically clean methods employing pure tree decays of neutral Bd,s mesons.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Extracting γ Through Flavour-Symmetry Strategies

A brief overview of flavour-symmetry strategies to extract the angle γ of the unitarity triangle is given, focusing on B → πK modes and the Bd → π+π−, Bs → K+K− system. We discuss also a variant of the latter approach for the e+e− B-factories, where Bs → K+K− is replaced by Bd → πK. Contribution to the Proceedings of the Workshop on the CKM Unitarity Triangle, CERN, Geneva, 13–16 February 2002 ...

متن کامل

New Strategies to Extract β and γ from B d → π + π − and B s → K + K −

The decays Bd → π+π− and Bs → K+K− are related to each other by interchanging all down and strange quarks, i.e. through the U -spin flavour symmetry of strong interactions. A completely general parametrization of the CP-violating observables of these modes is presented within the framework of the Standard Model, allowing the determination of the angles β and γ of the unitarity triangle. This st...

متن کامل

New Strategies to Extract CKM Phases from Non-Leptonic B Decays

Several new strategies to extract CKM phases, including a determination of γ from Bs(d) → J/ψKS decays and a general approach, which makes use of the angular distributions of certain Bd,s modes, such as Bd → J/ψ ρ 0 and Bs → J/ψ φ, are discussed. Special emphasis is put on a simultaneous determination of β and γ with the help of the decays Bd → π π and Bs → K K, which relies only on the U -spin...

متن کامل

Limitations in Measuring the Angle β by using SU ( 3 ) Relations for B - Meson Decay - Amplitudes ∗

Flavour SU(3) symmetry of strong interactions and certain dynamical assumptions have been used in a series of recent publications to extract weak CKM phases from B-decays into {ππ, πK,KK̄} final states. We point out that irrespectively of SU(3)-breaking effects the presence of QCD-penguin contributions with internal uand c-quarks precludes a clean determination of the angle β in the unitarity tr...

متن کامل

Waiting for the Discovery of B 0 d → K 0 K̄ 0

The CP asymmetries of the decay B0 d → K 0K̄0, which originates from b̄ → d̄ss̄ flavour-changing neutral-current processes, and its CP-averaged branching ratio BR(Bd → K 0K̄0) offer interesting avenues to explore flavour physics. We show that we may characterize this channel, within the Standard Model, in a theoretically clean manner through a surface in observable space. In order to extract the rel...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003