Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

X(3872) production in pp with particle multiplicity

Jan 12, 2021, 7:40 PM
1h 30m
Patio (vDLCC)



bullet talk (poster) The initial stages of heavy-ion collisions Poster


Eliane Epple (Los Alamos National Laboratory (US))


The last decade of hadron spectroscopy has unveiled a wealth of states that do not have the properties expected of particles composed of 2 or 3 valence quarks.
Among the most intriguing of these exotics is the X(3872), which various models attempt to describe as a hadronic molecule, a compact tetraquark, an unexpected charmonium state, or their mixtures. Production in heavy ion collisions, as well as high multiplicity pp collisions, offer a new window on the properties of this poorly understood hadron. In these systems, promptly produced X(3872) hadrons can interact with other particles in the nucleus and/or those produced in the collision.
The influence of these interactions on the observed X(3872) yields provides
information that can help discriminate between the various models of its
structure, as well as give insight into the dynamics of the bulk particles
produced in these collisions. With a full range of precision vertexing,
tracking, and particle ID capabilities covering 2 to 5 in units of rapidity,
the LHCb experiment is especially well suited to measurements of both prompt and non-prompt exotic hadrons.
This talk will present new LHCb measurements X(3872) production in high
multiplicity pp collisions through the decay to $J/\psi \pi^{+} \pi^{-}$.

Primary authors

Stefania Ricciardi (Science and Technology Facilities Council STFC (GB)) Eliane Epple (Los Alamos National Laboratory (US))

Presentation materials