B - anti-B mixing with domain wall fermions in the static approximation


Albertus, C., Aoki, Y., Boyle, P.A., Christ, N.H., Del Debbio, L., Dumitrescu, T.T., Flynn, J.M., Izubuchi, T., Loktik, O., Sachrajda, C.T., Soni, A. and Wennekers, J. (2007) B - anti-B mixing with domain wall fermions in the static approximation. In, Bali, Gunnar, Braun, Vladimir, Gattringer, Christof, Göckeler, Meinulf, Schäfer, Andreas, Weisz, Peter and Wettig, Tilo (eds.) Proceedings of Lattice 2007, The XXV International Symposium on Lattice Field Theory. Lattice 2007, the XXV International Symposium on Lattice Field Theory Trieste, Italy, International School for Advanced Studies. (376).

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Description/Abstract

We present preliminary numerical results for the pseudoscalar decay constants fB and fBs and
the DB = 2 mixing matrix elements in the B0 and B0s
systems. We use the static approximation
for the b-quark with two variants of gauge field smearing (APE and HYP2) in the static lattice
action. The light quarks are 2+1 dynamical flavours of Domain Wall Fermions at fixed lattice
spacing of 0.12fm with the lightest pion mass at 400MeV. At this lattice spacing we have found
large differences in our observables computed with the different smearings. The matching to the
renormalised continuum theory is done at one loop in perturbation theory

Item Type: Book Section
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Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 56959
Date Deposited: 20 Aug 2008
Last Modified: 27 Mar 2014 18:39
Publisher: International School for Advanced Studies
URI: http://eprints.soton.ac.uk/id/eprint/56959

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