Publication
Search for muoproduction of $X (3872)$ at COMPASS and indication of a new state $\widetilde{X}(3872)$
| dc.contributor.author | COMPASS collaboration (228 authors) | |
| dc.contributor.author | Bordalo, P. | |
| dc.contributor.author | Franco, C. | |
| dc.contributor.author | Nunes, A.S. | |
| dc.contributor.author | Quaresma, M. | |
| dc.contributor.author | Quintans, C. | |
| dc.contributor.author | Ramos, S. | |
| dc.contributor.author | Silva, L. | |
| dc.contributor.author | Stolarski, M. | |
| dc.date.accessioned | 2019-02-04T13:21:54Z | |
| dc.date.available | 2019-02-04T13:21:54Z | |
| dc.date.issued | 2018-08-10 | |
| dc.date.updated | 2019-02-04T13:21:54Z | |
| dc.description.abstract | We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \rightarrow \mu^+ (J\!/\!\psi\pi^+\pi^-)\pi^{\pm}~N'$ using COMPASS data collected with incoming muons of 160~GeV/$c$ and 200~GeV/$c$ momentum. The statistical significance of the $X(3872)$ signal is 6$\sigma$. The shape of the two-pion mass distribution shows disagreement with previous observations. The product of cross section and branching fraction of the $X(3872)$ decay into $J\!/\!\psi\pi\pi$ is determined to be 71$\pm$28(stat)$\pm$39(syst)~pb. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B783 (2018) 334-340; DOI 10.1016/j.physletb.2018.07.008 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2018.07.008 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27381 | |
| dc.language.iso | eng | |
| dc.title | Search for muoproduction of $X (3872)$ at COMPASS and indication of a new state $\widetilde{X}(3872)$ | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |