Excited Scalar Mesons and the Search for Glueballs

Abstract

We discuss the importance of mixing between glueballs -- bound states of gluons -- and excited $\bar{q}q$ states for the glueball search. A preliminary study of the excited states in the Extended Linear Sigma Model (eLSM) suggests their masses in the scalar channel to be in the vicinity of the scalar-glueball mass found in Lattice QCD. This could have implications for future glueball searches.

Comments: 6 pages, 1 figure. Prepared for Proceedings of the 12th International Conference on Low Energy Antiproton Physics (LEAP), Kanazawa/Japan, March 6-11, 2016