# The 34th International Symposium on Lattice Field Theory (Lattice 2016)

24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

## On the nature of an excited state

29 Jul 2016, 14:00
20m
Building B2a Room 2077 (Highfield Campus, University of Southampton)

### Building B2a Room 2077

#### Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Hadron Structure

### Speaker

Dr Benoît Blossier (CNRS/LPT Orsay)

### Description

In many lattice simulations with dynamical quarks, radial or orbital excitations of hadrons lie near multihadron thresholds: it makes the extraction of excited states properties more challenging and cqn introduce some systematics difficult to estimate without an explicit computation of correlators using interpolating fields strongly coupled to multihadronic states. In a recent study of the strong decay of the first radial excitation of the $B^*$ meson, this issue has been investigated and we have clues that a diquark interpolating field $\bar{b} \gamma^i q$ is very weakly coupled to a $B \pi$ $P$-wave state while the situation is quite different if we consider an interpolating field of the kind $\bar{b} \nabla^i q$, where $\vec{\nabla}$ is a covariant derivative: those statements are based on examining the charge density distribution.

### Primary author

Dr Benoît Blossier (CNRS/LPT Orsay)

### Co-author

Dr Antoine Gérardin (University of Mainz)

 Slides