| Article | |
| Report number | arXiv:1712.01345 |
| Title | Muoproduction of exotic charmonia at COMPASS |
| Related title | Muoproduction of exotic charmonia at COMPASS |
| Author(s) | Guskov, A. (Dubna, JINR) |
| Collaboration | COMPASS Collaboration |
| Publication | SISSA, 2017-11-27 |
| Imprint | 2017-12-04 |
| Number of pages | 5 |
| Note | 4 pares 4 figures |
| In: | PoS Hadron2017 (2018) 125 |
| In: | XVII International Conference on Hadron Spectroscopy and Structure, Salamanca, Spain, 25 - 29 Sep 2017, pp.125 |
| DOI | 10.22323/1.310.0125 |
| Subject category | hep-ph ; Particle Physics - Phenomenology ; hep-ex ; Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN SPS ; COMPASS NA58 |
| Abstract | Exotic charmonium-like states have been targeted by various experiments in the last 15 years, but their nature still is unknown. Photo-(muo)production is a new promising instrument to study them. COMPASS, a fixed target experiment at CERN, analyzed the full set of the data collected with a muon beam between 2002 and 2011, covering the range from 7 GeV to 19 GeV in the centre-of-mass energy of the (virtual)photon-nucleon system. Production of the X(3872) state in the reaction $\mu^+ N \rightarrow \mu^+(J/\psi\pi^+\pi^- )\pi^{\pm} N'$ has been observed with a statistical significance of around 5 $\sigma$. The shape of the $\pi^+\pi^-$ mass distribution from the decay $X(3872)\rightarrow J/\psi\pi^+\pi^-$ shows disagreement with previous observations. The product of the cross section and the branching fraction of the $X(3872)$ decay into $J/\psi\pi\pi$ is estimated as 71$\pm$28(stat)$\pm$39(syst) pb. The results obtained for the production of the $Z_c^{\pm}(3900)$ are also reported as well as future perspectives. |
| Copyright/License | arXiv nonexclusive-distrib. 1.0 publication: (License: CC-BY-NC-ND-4.0) |
Corresponding record in: Inspire
Record created 2017-12-08, last modified 2021-05-03
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