# XIIth Quark Confinement and the Hadron Spectrum

28 August 2016 to 4 September 2016
Europe/Athens timezone

## Relations among spin-1 meson decay widths from an SU(4) emergent symmetry in QCD

30 Aug 2016, 19:40
2h
Terrace (Makedonia Palace)

Poster session

### Speaker

Hiroki Nishihara (Nagoya University)

### Description

Introduction
Chiral model with $\mbox{SU}(4)\times\mbox{U}(1)$ HLS
Relations obtained from the emergent symmetry
Numerical analysis
Summary

### Summary

Recently, existence of an SU(4) symmetry in QCD is suggested via the lattice QCD, which is called as "emergent symmetry". The spin-1 mesons $(\rho, \rho,\omega', a_1 , f_1 , b_1, h_1)$ belong to a multiplet of the emergent symmetry. To investigate the interactions of the spin-1 mesons, we construct a chiral model with an $\mbox{SU(4)}\times\mbox{U(1)}$ hidden local symmetry(HLS), where the spin-1 mesons are introduced as an HLS gauge field.
We find extended Goldberger-Treiman relations, relations among one-pion decays of spin-1 mesons, and extended KSRF relations. They give us some predictions which are testable in future experiments, such as ratios of the spin-1 meson decay widths.

### Primary author

Hiroki Nishihara (Nagoya University)