Work

Proper constituent gluon mass as the final piece to construct hybrid mesons

Year: 2025

Type: article

Abstract: In this Letter, we propose that a proper constituent gluon mass m g = 450 MeV can be applied to identify the hybrids composed of quarks and gluons. By investigating the spectra and decay widths of the light hybrids ( q q ¯ g ) with J P = 1 − + , we find the π 1 ( 1600 ) and η 1 ( 1855 ) may not be explained as 1 − + hybrids, simultaneously, and the η 1 ( 1855 ) observed by BESIII may not be a hybrid. In addition, we predict an existence of a hybrid η 1 ( 1640 ) , which can be verified by searching the a 1 ( 1260 ) π channel. Moreover, we suggest the K 1 ( 1270 ) K ¯ and K 1 ( 1270 ) π as the golden channels to search for isospin-0 and isospin- 1 2 hybrids, respectively.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/yq7l-jmyg