Studying the Pc(4450) resonance in J/psi photoproduction off protons

Mar 14, 2017, 6:00 PM
Seminar Room (Bad Honnef)

Seminar Room

Bad Honnef

Topic 1: Spectroscopy of Baryons, Light- and Heavy-Quark Mesons Session


Mrs Astrid Hiller Blin (Universidad de Valencia)


We study the $P_c(4450)$ structure in $J/\psi$ photoproduction, and discuss the feasibility of observing it in the CLAS12 experiment at the Jefferson Lab. This resonance-like structure has recently been observed in the $J/\psi~p$ spectrum by the LHCb collaboration.

Our study presents a first estimate of the upper limit for the branching ratio of the $P_c(4450)$ to the $J/\psi~p$ channel. We take into account the experimental resolution effects, and predict that it will be possible to observe a sizable cross section close to the $J/\psi$ production threshold. This will shed light on the nature of the $P_c(4450)$ resonance in the future photoproduction measurements.

Furthermore, we give a study of the angular distributions of the differential cross sections, analyzing their sensitivity on the photocoupling sizes. With this information, the latter can also be constrained experimentally.

Primary authors

Adam Szczepaniak (iu) Mrs Astrid Hiller Blin (Universidad de Valencia) Alessandro Pilloni (Jefferson Lab) Vincent Mathieu (Indiana University) Andrew Jackura (Indiana University) Mr Cesar Fernández-Ramı́rez Dr Viktor Mokeev (Jefferson Lab)

Presentation materials