0+ and 1+ heavy-light exotic mesons at N2LO in the chiral limit
Abstract
We use QCD spectral sum rules (QSSR) and the factorization properties of molecule and four-quark currents to estimate the masses and couplings of the 0+ and 1+ molecules and four-quark at N2LO of PT QCD. We include in the OPE the contributions of non-perturbative condensates up to dimension-six. Within the Laplace sum rules approach (LSR) and in the MS-scheme, we summarize our results in Table 2, which agree within the errors with some of the observed XZ-like molecules or/and four-quark. Couplings of these states to the currents are also extracted. Our results are improvements of the LO ones in the existing literature.
Keywords
Cite
@article{arxiv.1801.09110,
title = {0+ and 1+ heavy-light exotic mesons at N2LO in the chiral limit},
author = {R. M Albuquerque and S. Narison and F. Fanomezana and A. Rabemananjara and D. Rabetiarivony and G. Randriamanatrika},
journal= {arXiv preprint arXiv:1801.09110},
year = {2018}
}
Comments
5 pages, 2 Tables, 5 Figures, Part of the review talk presented by S. Narison at QCD17-Montpellier-FR (3-7 july 2017) and Talk presented by A. Rabemananjara at HEPMAD17-Antananarivo-MG (21-26 september2017). To appear in the proceedings