Mixings of 4-quark components in light non-singlet scalar mesons in QCD sum rules
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
Mixings of 4-quark components in the non-singlet scalar mesons are studied in the QCD sum rules. We propose a formulation to evaluate the cross correlators of q\bar q and qq\bar q \bar q operators and to define the mixings of different Fock states in the sum rule. It is applied to the non-singlet scalar mesons, a_0 and K_0^\ast. It is found that the 4-quark operators predict lower masses than the q\bar q operators and that the 4-quark states occupy about 70-90% of the lowest mass states.
Keywords
Cite
@article{arxiv.0707.2533,
title = {Mixings of 4-quark components in light non-singlet scalar mesons in QCD sum rules},
author = {J. Sugiyama and T. Nakamura and N. Ishii and T. Nishikawa and M. Oka},
journal= {arXiv preprint arXiv:0707.2533},
year = {2008}
}
Comments
8 pages, 9 figures