July 31, 2018 to August 6, 2018
Maynooth University
Europe/Dublin timezone

How to find the glueball among the f0s with the QCD counting rules

Aug 6, 2018, 11:36 AM
JH1 (Maynooth University)


Maynooth University

Invited plenary talk B: Light quarks Plenary


Felipe J. Llanes-Estrada (Univ. Complutense de Madrid)


We propose a model-independent method to ascertain the leading valence composition of a hadron: to measure the energy dependence of its production cross section at a fixed angle interval. This E-dependence, by the QCD Brodsky-Farrar counting rules, falls at high energy with a steepness that depends on the leading quark and gluon composition.
We exemplify with a reaction that could help classify the f0 mesons, exclusive e-e+ -> phi + f0
with an easily reconstructible final state. Some of the f0 may have a glueball gg component in their wavefunction decomposition; this will dominate at high energy over higher twist quark-antiquark components (because they necessarily have a p-wave) or hybrid/tetraquark components (because of the higher number of particles in the final state). We discuss the prospects to carry out this or similar analysis in Belle II.

Primary authors

Felipe J. Llanes-Estrada (Univ. Complutense de Madrid) Stanley J. Brodsky (Stanford Linear Accelerator Center) Jose R. Pelaez (Univ. Complutense de Madrid)

Presentation materials