English

The $a_0(980)$ physics in semileptonic $D^0$ and $D^+$ decays

High Energy Physics - Phenomenology 2018-11-29 v2 High Energy Physics - Experiment Nuclear Theory

Abstract

The decays D0duˉe+νa0(980)e+νπηe+νD^0\to d\bar u\,e^+\nu\to a^-_0(980)\, e^+\nu\to\pi^-\eta\, e^+\nu and D+ddˉe+νa00(980)e+νπ0ηe+νD^+\to d\bar d\,e^+\nu\to a^0_0(980)\, e^+\nu\to\pi^0\eta\, e^+\nu (and the charge conjugated ones) is the direct probe of the two-quark components in the a0±(980)a^\pm_0(980) and a00(980)a^0_0(980) wave functions. Recent BESIII experiment is the first step in experimental study of these decays. We present a possible variant of ηπ\eta\pi invariant mass distribution when a0(980)a_0(980) has no qqˉq\bar q component at all.

Keywords

Cite

@article{arxiv.1805.10145,
  title  = {The $a_0(980)$ physics in semileptonic $D^0$ and $D^+$ decays},
  author = {N. N. Achasov and A. V. Kiselev},
  journal= {arXiv preprint arXiv:1805.10145},
  year   = {2018}
}

Comments

16 pages, 9 figures. Updated version corresponding to PRD article. An essential upgrade, including taking into account the KLOE-2009 data on the phi-> eta pi0 gamma decay. arXiv admin note: text overlap with arXiv:1711.08777