Is X(3872) a bound state? Ortega, Pablo G. Ruiz Arriola, Enrique Charmonium molecular states Particle production Tsallis distribution 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. 2019-12-19T10:35:38Z 2019-12-19T10:35:38Z 2019 info:eu-repo/semantics/article Ortega, P. G., & Arriola, E. R. (2019). Is X (3872) a bound state?. Chinese Physics C, 43(12), 124107. http://hdl.handle.net/10481/58411 10.1088/1674-1137/43/12/124107 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España IOP Publishing