# International Workshop on Partial Wave Analyses and Advanced Tools for Hadron Spectroscopy

Mar 13 – 17, 2017
Europe/Zurich timezone

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

Mar 14, 2017, 6:00 PM
30m

### Seminar Room

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

### Speaker

Mrs Astrid Hiller Blin (Universidad de Valencia)

### Description

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) Dr Viktor Mokeev (Jefferson Lab)