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Improved lattice study of semileptonic decays of d-mesons

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Improved lattice study of semileptonic decays of d-mesons

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dc.contributor.author	Bowler, Ken C.
dc.contributor.author	Hazel, Nick
dc.contributor.author	Hoeber, Henning
dc.contributor.author	Kenway, Richard D.
dc.contributor.author	Richards, D.G.
dc.contributor.author	Lellouch, Laurent
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.contributor.author	Sachrajda, Christopher T.
dc.contributor.author	Wittig, Hartmut
dc.date.accessioned	2014-10-16T11:45:11Z
dc.date.available	2014-10-16T11:45:11Z
dc.date.issued	1995
dc.identifier.citation	Bowler, Ken C. Hazel, Nick Hoeber, Henning Kenway, Richard D. Richards, D.G. Lellouch, Laurent Nieves Pamplona, Juan Miguel Sachrajda, Christopher T. Wittig, Hartmut 1995 Improved lattice study of semileptonic decays of d-mesons Physical Review D 51 9 4905 4923
dc.identifier.uri	http://hdl.handle.net/10550/39213
dc.description.abstract	We present results of a lattice computation of the matrix elements of the vector and axial-vector currents which are relevant for the semi-leptonic decays D→K and D→K∗. The computations are performed in the quenched approximation to lattice QCD on a 243×48 lattice at β=6.2, using an O(a)-improved fermionic action. In the limit of zero lepton masses the semi-leptonic decays D→K and D→K∗ are described by four form factors: f+K,V,A1 and A2, which are functions of q2, where qμ is the four-momentum transferred in the process. Our results for these form factors at q2=0 are: $f^+_K(0)=0.67 \er{7}{8}$ , $V(0)=1.01 \err{30}{13}$ , $A_1(0)=0.70 \err{7}{10}$ , $A_2(0)=0.66 \err{10}{15}$ , which are consistent with the most recent experimental world average values. We have also determined the q2 dependence of the form factors, which we find to be reasonably well described by a simple pole-dominance model. Results for other form factors, including those relevant to the decays \dpi and \drho, are also given.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 1995, vol. 51, num. 9, p. 4905-4923
dc.subject	Física
dc.title	Improved lattice study of semileptonic decays of d-mesons
dc.type	journal article	es_ES
dc.date.updated	2014-10-16T11:45:11Z
dc.identifier.doi	10.1103/PhysRevD.51.4905
dc.identifier.idgrec	068621
dc.rights.accessRights	open access	es_ES