Lattice2010

Session

Parallel 30: Weak decays and matrix elements

15 Jun 2010, 16:40

Villasimius, Sardinia

199. A Progress Report on B^0 Mixing

Christopher Bouchard (U. of Illinois)

15/06/2010, 16:40

Weak decays and matrix elements

We give a progress report on the calculation of B^0 mixing matrix elements, focusing on contributions that could arise beyond the Standard Model. The calculation uses asqtad (light quark) and Fermilab (heavy quark) valence actions and MILC ensembles with 2+1 flavors of asqtad sea quarks.

308. B-physics with dynamical domain-wall light quarks and relativistic b-quarks

Oliver Witzel (Brookhaven National Laboratory)

15/06/2010, 17:00

Weak decays and matrix elements

We report on our progress in calculating the B-meson decay constants and B^0-bar B^0 mixing parameters using domain-wall light quarks and relativistic b-quarks. We present our computational method and show some preliminary results obtained on the coarser (a approx 11fm) 24^3 lattices. This work is presented for the RBC and UKQCD collaborations.

273. Neutral B meson mixing with 2+1 flavor domain-wall light and static heavy quarks

Yasumichi Aoki (RIKEN BNL Research Center)

15/06/2010, 17:20

Weak decays and matrix elements

The B^0--anti-B^0 mixing parameter for the B_d and B_s meson is calculated using the domain-wall fermions (DWF) for the light quarks and improved static fermions for the b quark on the 1/a=~1.7 GeV n_f=2+1 Iwasaki-DWF ensembles. The static approximation has the sizable Lambda/m_h leading systematic error. The systematic error for the SU(3)_f breaking ratio, however, is suppressed by...