Few-charge systems and multi-quark states

International Conference on Atomic and Nuclear Physics

November 17-18, 2016 Atlanta, USA

Jean-Marc Richard

Universit�© de Lyon, France

Posters & Accepted Abstracts: J Astrophys Aerospace Technol

Abstract :

This study briefly reviews the patterns of the stability or instability of three unit-charge systems (m1 +, m2 -, m3 -) and four unit charge systems and (m1 +, m2 +, m3 -, m4 -) when the masses are varied, with, in particular, the improved stability of the hydrogen molecule as compared to the positronium molecule. Within quark models inspired by Quantum Chromo Dynamics, there is a close analogy in the limit of heavy quarks where the chromo-electric interaction dominates. Tetraquark states (Q, Q, q, q) are predicted to be stable when the quark-to-antiquark mass ratio M/m becomes very large. Other multi-quark states are formed by coherences in the chromo-magnetic interaction, without analogues in atomic physics. Some recent experimental results on exotics mesons and baryons from SLAC, Fermilab, KEK, CERN, etc., will be presented and commented.

Biography :

Email: j-m.richard@ipnl.in2p3.fr