$\bar D^*D^*_0$ and $\bar B^*B^*_0 (1^--)$ molecules at N2LO from QSSR

F. Fanomezana; S. Narison; A. Rabemananjara

$\bar D^D^_0$ and $\bar B^B^_0 (1^--)$ molecules at N2LO from QSSR

High Energy Physics - Phenomenology 2014-10-02 v1

Authors: F. Fanomezana , S. Narison , A. Rabemananjara

Abstract

We estimate the $\bar D^*D^*_0$ and $\bar B^*B^*_0(1^--)$ molecules masses and couplings using QCD spectral sum rules (QSSR)known perturbatively to N2LO of PT series and including the contributions of non-perturabtive condensates up to the dimension-eight. Our results improve earlier LO results obtained from QSSR in the current literature. We obtain $M_{D^*D^*_0} = 5244(228)$ MeV which is heavier than the experimental candidates Y(4260); Y(4360); Y(4660) suggesting that they cannot be pure molecule states. We predict $M_{B^*B^*_0}= 11920(159)$ MeV to be tested in B-factory experiments.

Keywords

QCD spectral sum rules molecular states N2LO heavy meson molecules mass prediction non-perturbative condensates

Cite

@article{arxiv.1410.0137,
  title  = {$\bar D^*D^*_0$ and $\bar B^*B^*_0 (1^--)$ molecules at N2LO from QSSR},
  author = {F. Fanomezana and S. Narison and A. Rabemananjara},
  journal= {arXiv preprint arXiv:1410.0137},
  year   = {2014}
}

Comments

4 pages, 12 figures, Talk given at the 17th International Conference on Quantum Chromodynamics (QCD 14) (29 june - 3 july 2014, Montpellier-France), to appear in Nucl. Phys. B (Proc. Suppl.)