@misc{10481/58411,
year = {2019},
url = {http://hdl.handle.net/10481/58411},
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.},
organization = {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)},
publisher = {IOP Publishing},
keywords = {Charmonium molecular states},
keywords = {Particle production},
keywords = {Tsallis distribution},
title = {Is X(3872) a bound state?},
doi = {10.1088/1674-1137/43/12/124107},
author = {Ortega, Pablo G. and Ruiz Arriola, Enrique},
}