RT Journal Article
T1 Refining the scalar and tensor contributions in τ → πππντ decays
A1 Sanz Cillero, Juan José
A1 Shekhovtsova, Olga
AB In this article we analyze the contribution from intermediate spin-0 and spin-2 resonances to the τ → νπππ decay by means of a chiral invariant Lagrangian incorporating these mesons. In particular, we study the corresponding axial-vector form-factors. The advantage of this procedure with respect to previous analyses is that it incorporates chiral (and isospin) invariance and, hence, the partial conservation of the axial-vector current. This ensures the recovery of the right low-energy limit, described by chiral perturbation theory, and the transversality of the current in the chiral limit at all energies. Furthermore, the meson form-factors are further improved by requiring appropriate QCD high-energy conditions. We end up with a brief discussion on its implementation in the Tauola Monte Carlo and the prospects for future analyses of Belle’s data.
PB Springer
SN 1029-8479
YR 2017
FD 2017-12-14
LK https://hdl.handle.net/20.500.14352/19391
UL https://hdl.handle.net/20.500.14352/19391
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
DS Docta Complutense
RD 12 abr 2025