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SUMMARY:B_c decays from highly improved staggered quarks and NRQCD - Andre
 w Lytle (Glasgow University)
DTSTART:20160429T150000Z
DTEND:20160429T160000Z
UID:TALK64768@talks.cam.ac.uk
CONTACT:Marco Nardecchia
DESCRIPTION:We use both non-relativistic QCD (NRQCD) and fully relativisti
 c formalisms to calculate\nsemileptonic form factors for the decays B_c ->
  eta_c lv and B_c -> J/psi lv over the entire q2 range.To achieve this we 
 employ a highly improved lattice quark action and at several lattice spaci
 ngs down to a=.044 fm\, which allow a fully relativistic treatment of char
 m and simulation of the full q2 range with controlled continuum extrapolat
 ion.  We have two ways of treating the b quark: either with an O(alpha_s) 
 improved NRQCD formalism or by extrapolating a heavy mass m_h to m_b in th
 e relativistic formalism.  We find good agreement between these approaches
  which provides an important cross-check of our results
LOCATION:B1.19\, DAMTP
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