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

Jul 24 – 30, 2016
Highfield Campus, University of Southampton
Europe/London timezone

## Heavy and light spectroscopy near the physical point, Part II: Tetraquarks

Jul 25, 2016, 2:35 PM
20m
Building B2a Room 2065 (Highfield Campus, University of Southampton)

### Speaker

Dr Anthony Francis (York University)

### Description

Having introduced the ensembles and basic spectrum in Part I, we focus on results for a doubly heavy tetraquark candidate, $qq\bar Q \bar Q$. Based on phenomenological observations regarding heavy baryon systems, we motivate two possible lattice interpolating operators: a diquark-anti diquark and a meson-meson. We show these operators exhibit good behaviour both in terms of lattice QCD and their phenomenological interpretation. In particular we study the $qq\bar b \bar b$, $qq\bar c \bar b$ and $qq\bar c \bar c$ with $qq=ud,us$ flavor combinations and analyze their binding. In the chiral limit, at finite lattice spacing, we find strong indications for binding of the $qq=ud$ tetraquark candidates. We comment on possible search windows for experimental confirmation.

### Primary authors

Dr Anthony Francis (York University) Kim Maltman (York University) Randy Lewis (York University) Dr Renwick J. Hudspith (York University)

 Slides