Mostrar el registro sencillo del ítem
Is X(3872) a bound state?
dc.contributor.author | Ortega, Pablo G. | |
dc.contributor.author | Ruiz Arriola, Enrique | |
dc.date.accessioned | 2019-12-19T10:35:38Z | |
dc.date.available | 2019-12-19T10:35:38Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Ortega, P. G., & Arriola, E. R. (2019). Is X (3872) a bound state?. Chinese Physics C, 43(12), 124107. | es_ES |
dc.identifier.uri | http://hdl.handle.net/10481/58411 | |
dc.description.abstract | All existing experimental evidence for the bound state nature of X(3872) relies on observing its decay products, which are measured with a finite experimental mass resolution that is typically deltam>2 MeV , and much larger than its alleged binding energy, Bx = 0.00(18) MeV. On the other hand, we have found recently that there is a clear cancellation in the 1++ channel of the invariant DD* mass around the threshold between continuum and the bound state. This is very much like a similar cancellation in the proton-neutron continuum with the deuteron in the 1++ channel. Based on comparative fits with a common Tsallis distribution of the experimental cross-sections for prompt production of deuterons and X(3872) in pp collisions with a finite Pt , we find a strong argument for questioning the bound state nature of this state, which also suggests that the large observed production rate could be consistent with a half-bound state. | es_ES |
dc.description.sponsorship | This work is partly supported by the Spanish Ministerio de Economía y Competitividad and European FEDER funds (FPA2016-77177-C2-2-P, FIS2017-85053- C2-1-P) and Junta de Andalucía (FQM-225) | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | IOP Publishing | es_ES |
dc.rights | Atribución 3.0 España | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | Charmonium molecular states | es_ES |
dc.subject | Particle production | es_ES |
dc.subject | Tsallis distribution | es_ES |
dc.title | Is X(3872) a bound state? | es_ES |
dc.type | journal article | es_ES |
dc.rights.accessRights | open access | es_ES |
dc.identifier.doi | 10.1088/1674-1137/43/12/124107 |