%0 Conference Proceedings
%T 0$^+$ and 1$^+$ heavy-light exotic mesons at N2LO in the chiral limit
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%A Albuquerque, R.M
%A Fanomezana, F.
%A Narison, S.
%A Rabemananjara, A.
%A Rabetiarivony, D.
%A Randriamanatrika, G.
%< sans comité de lecture
%B 20th High-Energy Physics International Conference in Quantum Chromodynamics
%C Montpellier, France
%8 2017-07-03
%D 2017
%Z 1801.09110
%K sum rule: spectral
%K sum rule: Laplace
%K condensation
%K nonperturbative
%K meson: exotic
%K quantum chromodynamics
%K operator product expansion
%K quantum chromodynamics: perturbation theory
%K higher-order
%K factorization
%K chiral
%K tetraquark
%Z Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
%Z Physics [physics]/High Energy Physics - Experiment [hep-ex]
%Z Physics [physics]/High Energy Physics - Lattice [hep-lat]Conference papers
%X 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.
%G English
%L hal-01714141
%U https://hal.science/hal-01714141
%~ IN2P3
%~ CNRS
%~ LUPM
%~ UNIV-MONTPELLIER
%~ LUPM_IFAC
%~ UM-2015-2021