English

Production of X(3872) at PANDA

High Energy Physics - Phenomenology 2008-11-26 v2

Abstract

The recently discovered XX(3872) has many possible interpretations. We study the production of XX(3872) with PANDA at GSI for the antiproton-proton collision with two possible interpretations of X(3872). One is as a loosely-bound molecule of DD-mesons, while another is a 2P charmonium state χc1\chi_{c1} (2P). Using effective couplings we are able to give numerical predictions for the production near the threshold and the production associated with π0\pi^0. The produced XX(3872) can be identified with its decay J/ψπ+πJ/\psi \pi^+\pi^-. We also study the possible background near the threshold production for X(3872)J/ψπ+πX(3872) \to J/\psi \pi^+\pi^-. With the designed luminosity 1.5fb11.5{\rm fb}^{-1} per year of PANDA we find that the event number of ppˉJ/ψπ+πp\bar p \to J/\psi \pi^+\pi^- near the threshold is at the order of 10610810^6 \sim 10^8, where the large uncertainty comes from the total decay width of X(3872). Our study shows that at the threshold more than about 60% events come from the decay of X(3872) and two interpretations are distinguishable from the line-shape of the production. With our results we except that the PANDA experiments will shed light on the property of X(3872).

Keywords

Cite

@article{arxiv.0802.2982,
  title  = {Production of X(3872) at PANDA},
  author = {G. Y. Chen and J. P. Ma},
  journal= {arXiv preprint arXiv:0802.2982},
  year   = {2008}
}

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R2 v1 2026-06-21T10:14:26.201Z