Physical matrix elements for ∆ I = 3 / 2 channel K → ππ decays

نویسنده

  • Matthew Lightman
چکیده

are calculated on the RBC/UKQCD 32 3 × 64, L s = 16 lattices, using 2+1 dynamical flavors and domain wall fermions, with an inverse lattice spacing of a −1 = 2.42(4) GeV. Data is interpolated or extrapolated to energy conserving kinematics and a preliminary calculation of the experimental parameter |A 2 | is performed.

برای دانلود رایگان 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

ar X iv : 0 90 6 . 18 47 v 2 [ he p - la t ] 1 1 Ju n 20 09 Physical matrix elements for ∆ I = 3 / 2 channel K → ππ decays

are calculated on the RBC/UKQCD 32 3 × 64, L s = 16 lattices, using 2+1 dynamical flavors and domain wall fermions, with an inverse lattice spacing of a −1 = 2.42(4) GeV. Data is interpolated or extrapolated to energy conserving kinematics and a preliminary calculation of the experimental parameter |A 2 | is performed.

متن کامل

ar X iv : 0 90 6 . 18 47 v 1 [ he p - la t ] 1 0 Ju n 20 09 Physical matrix elements for ∆ I = 3 / 2 channel K → ππ decays

are calculated on the RBC/UKQCD 32 3 × 64, L s = 16 lattices, using 2+1 dynamical flavors and domain wall fermions, with an inverse lattice spacing of a −1 = 2.42(4) GeV. Data is interpolated or extrapolated to energy conserving kinematics and a preliminary calculation of the experimental parameter |A 2 | is performed.

متن کامل

Decays on Finite Volumes and at Next-to-Leading Order in the Chiral Expansion

We present the ingredients necessary for the determination of physical K → ππ decay amplitudes for ∆I = 3/2 transitions, from lattice simulations at unphysical kinematics and the use of chiral perturbation theory at next-to-leading order. In particular we derive the expressions for the matrix elements I=2〈 ππ|OW |K〉, where OW is one of the operators appearing in the ∆S = 1 weak Hamiltonian, in ...

متن کامل

Contribution of sigma meson pole to K L - K S mass difference ∗

The hypothesis of σ meson pole dominance in the |∆I| = 1 2 K → ππ amplitudes is tested qualitatively by using the KL-KS mass difference. Dominance of σ-meson pole contribution in the amplitudes for the KS → ππ decays was first proposed as the origin of the well-known |∆I| = 1 2 rule in these decays [1], and recently revived in connection with the direct CP violation in the K → ππ decays [2]. If...

متن کامل

Decays with Domain Wall Fermions: Lattice Matrix Elements

We present a lattice calculation of the K → π and K → 0 matrix elements of the ∆S = 1 effective weak Hamiltonian which can be used to determine ǫ′/ǫ and the ∆I = 1/2 rule for K decays in the Standard Model. The matrix elements for K → ππ decays are related to K → π and K → 0 using lowest order chiral perturbation theory. We also present results for the kaon B parameter, BK . Our quenched domain...

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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2008