Lattice study of the decay (B)over-bar(0)->p(+)l(-)(v)over-bar(l): Model-independent determination of vertical bar V-ub vertical bar
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Lattice study of the decay (B)over-bar(0)->p(+)l(-)(v)over-bar(l): Model-independent determination of vertical bar V-ub vertical bar

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Lattice study of the decay (B)over-bar(0)->p(+)l(-)(v)over-bar(l): Model-independent determination of vertical bar V-ub vertical bar

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Flynn, Jonathan M.; Nieves Pamplona, Juan Miguel; Bowler, Ken C.; Hazel, Nick; Henty, David S.; Hoeber, Henning; Kenway, Richard D.; Richards, D.G.; Gough, B.J.; Shanahan, Hugh P.; Lellouch, Laurent
Aquest document és un/a article, creat/da en: 1996
We present results of a lattice computation of the vector and axial-vector current matrix elements relevant for the semileptonic decay (B) over bar(0) --> rho(+)l(-)<(nu)over bar>(l). The computations are performed in the quenched approximation of lattice QCD on a 24(3) x 48 lattice at beta = 6.2, using an O(a) improved fermionic action. Our principal result is for the differential decay rate, d Gamma/dq(2), for the decay (B) over bar(0) --> rho(+)l(-)<(nu)over bar>(l), in a region beyond the charm endpoint, allowing a model-independent extraction of \V-ub\ from experimental measurements. Heavy quark symmetry relations between radiative and semileptonic decays of (B) over bar mesons into light vector mesons are also discussed.

    Flynn, Jonathan M. Nieves Pamplona, Juan Miguel Bowler, Ken C. Hazel, Nick Henty, David S. Hoeber, Henning Kenway, Richard D. Richards, D.G. Gough, B.J. Shanahan, Hugh P. Lellouch, Laurent 1996 Lattice study of the decay (B)over-bar(0)->p(+)l(-)(v)over-bar(l): Model-independent determination of vertical bar V-ub vertical bar Nuclear Physics B 461 1-2 327 349
http://dx.doi.org/10.1016/0550-3213(95)00595-1
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