Tau decay into ${\nu }_{\tau }$ and $a_1(1260)$, $b_1(1235)$, and two $K_1(1270)$

Abstract

We study the $\tau \to {\nu }_{\tau }A$ decay, with $A$ an axial-vector meson. We produce the $a_1(1260)$ and $b_1(1235)$ resonances in the Cabibbo favored mode and two $K_1(1270)$ states in the Cabibbo suppressed mode. We take advantage of previous chiral unitary approach results where these resonances appear dynamically from the vector and pseudoscalar meson interaction in s-wave. Actually two different poles were obtained associated to the $K_1(1270)$ quantum numbers. We find that the unmeasured rates for $b_1(1235)$ production are similar to those of the $a_1(1260)$ and for the two $K_1$ states we suggest to separate the present information on the $\bar{K}\pi \pi$ invariant masses into ${\bar{K}}^{\ast }\pi$ and $\rho K$ modes, the channels to which these two resonances couple most strongly, predicting that these modes peak at different energies and have different widths. These measurements should shed light on the existence of these two $K_1$ states.

References in corpus (8)

• Hidden gauge formalism for the radiative decays of axial-vector mesons
• Clues for the existence of two $K_1(1270)$ resonances
• Pseudocalar meson and vector meson interactions and dynamically generated axial-vector mesons
• Study of tau- --> V P- nu(tau) in the framework of resonance chiral theory
• Information on the structure of the a1 from tau decay
• Quantum loops in radiative decays of the $a_1$ and $b_1$ axial-vector mesons
• Tau decay and the structure of the a1
• Refining the scalar and tensor contributions in $\tau \to \pi \pi \pi {\nu }_{\tau }$ decays

Cited by in corpus (6)

• Pole position of the $a_1(1260)$ resonance in a three-body unitary framework
• Three-body dynamics of the $a_1(1260)$ resonance from lattice QCD
• The $\pi f_0(500)$ decay of the $a_1(1260)$
• Inconsistency of the data on the $K_1(1270)\to \pi K_0^{\ast }(1430)$ decay width
• The dynamically generated $h_1$ state by the $K^{\ast }{\bar{K}}^{\ast }$ interaction and its $K_1(1270)\bar{K}$ and $b_1(1235)\pi$ decays
• Observation of the singly Cabibbo suppressed decay $D^0\to b_1(1235{)}^{-}{e}^{+}{\nu }_e$ and evidence for $D^{+}\to b_1(1235{)}^0{e}^{+}{\nu }_e$