Axial-vector mesons from tau -> AP nu(tau) decays

作者：Calderon G^*; Munoz J H; Vera C E

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(11): 114011.

DOI：10.1103/PhysRevD.87.114011

Axial-vector mesons a(1)(1260), f(1)(1285), h(1)(1170), K-1(1270), and K-1(1400) can be produced in semileptonic tau -> AP nu(tau) decays, where P stands for the pseudoscalar mesons pi or K. We calculate the branching ratios based in a meson dominance model. The exclusive channels tau(-->)a(1) (1260)(-)pi(0)nu,tau(-)-> a(1)(1260)(0) tau(-)nu, and tau(-)-> h(1) 1(1170)pi(-)nu turn out to be of order O(10(-3)), the channel tau(-)-> f(1)(1285) pi-nu of order O(10-(4) ), and channels tau(-)-> h(1) K-1(1270)(-)pi nu,tau(-)-> K-1(1270)(0)pi(-)nu,tau(-)-> K-1(1400)(-)pi(0)nu and tau(-)-> K-1(1400)(0) pi(-)nu of order O(10(-6)). These results indicate that the branching ratios could be measured in experiments.

• 出版日期2013-6-12