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arXiv · 1801.09110

0+ and 1+ heavy-light exotic mesons at N2LO in the chiral limit

R. M Albuquerque·S. Narison·F. Fanomezana·A. Rabemananjara·D. Rabetiarivony·G. Randriamanatrika
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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.

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R. M Albuquerque, S. Narison, F. Fanomezana, A. Rabemananjara, D. Rabetiarivony, G. Randriamanatrika. 2018-01-27. 0+ and 1+ heavy-light exotic mesons at N2LO in the chiral limit. https://arxiv.org/abs/1801.09110

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