أعرض تسجيلة المادة بشكل مبسط

dc.creator Jamin, Matthias
dc.creator Pich, Antonio
dc.creator Portolés, Jorge
dc.date 2008-01-26T13:54:26Z
dc.date 2008-01-26T13:54:26Z
dc.date 2006-09-14
dc.date.accessioned 2017-01-31T00:59:46Z
dc.date.available 2017-01-31T00:59:46Z
dc.identifier Physics Letters B640 (2006) 176-181
dc.identifier http://hdl.handle.net/10261/2742
dc.identifier 10.1016/j.physletb.2006.06.058
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2742
dc.description With the newly available data sets on hadronic tau decays from the B-factories BABAR and BELLE, and future data from BESIII, precise information on the decay distributions will soon become available. This calls for an improvement of the decay spectra also on the theoretical side. In this work, the distribution function for the decay tau --> neutrino_tau K pion will be presented with the relevant Kaon-pion vector and scalar form factors being calculated in the framework of the resonance chiral theory, also taking into account additional constraints from dispersion relations and short-distances. As a by-product the slope and curvature of the vector form factor F_+^{K pion}(s) are determined to be lambda_+^{'}=25.6 x 10^{-3} and lambda_+^{''}=1.31 x 10^{-3} respectively. From our approach it appears that it should be possible to obtain information on the low lying scalar K_0^*(800) as well as the second vector K^*(1410) resonances from the tau decay data. In particular, the exclusive branching fraction of the scalar component is found to be B[tau -> neutrino_tau K pion)_{S-wave}]=(3.88 +- 0.19) x 10^{-4}.
dc.description Ministerio de Educación y Ciencia, FPA2005-02211, FPA2004-00996, Generalitat Valenciana, GRUPOS03/013, GV04B-594,GV05/015, European Commission, EU RTN Network EURIDICE, HPRN-CT2002-00311.
dc.description Peer reviewed
dc.format 174549 bytes
dc.format application/pdf
dc.language eng
dc.publisher Elsevier
dc.rights openAccess
dc.subject Decays of taus
dc.subject Chiral symmetries
dc.subject Dispersion relations
dc.title Spectral distribution for the decay tau -> neutrino_tau K pion
dc.type Artículo


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أعرض تسجيلة المادة بشكل مبسط