# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Search for the d*(2380) in p-Pb collisions at 5 TeV with ALICE at the LHC

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### Speaker

Pietro Fecchio (Universita e INFN Torino (IT))

### Description

The ALICE Collaboration started to investigate the baryon-baryon interaction through the search for exotic bound states via invariant mass analyses of different possible decay channels.
In this poster the study of the $d^{*}(2380)$ production in p-Pb collisions at $\sqrt{s_{\rm NN}}$=5.02 TeV with the ALICE detector at the LHC will be presented.
This dibaryon was recently observed at WASA-at-COSY. A narrow resonance with I($J^{P}$) = 0($3^{+}$) - named now $d^{*}(2380)$ - has been observed in all relevant two-pion decay channels as well as in np-scattering. Quark model calculations predict this state to be a compact hexaquark structure of size 0.8 fm, whereas Faddeev calculations with hadronic interactions favour a molecular structure.
Thanks to the excellent tracking and particle identification capabilities of the ALICE apparatus, the reconstruction and identification of the products of the $d^{*}(2380)$\rightarrow$d+pi^{+}+pi^{-}$ decay over a large momentum range is possible with high efficiency. A detailed Monte Carlo study of the expected correlated and uncorrelated background sources in the $d^{*}(2380)$ relevant invariant mass region will be presented in order to have an estimation of the statistical significance of the measurement.
The confirmation of the existence of the $d^{*}(2380)$ state would provide a new candidate for an exotic degree of freedom in the nuclear equation of state at high densities (e.g. neutron stars) and will open the hunt for other possible non-trivial exotic states produced in heavy ion collisions.

Centralised submission by Collaboration Presenter name already specified Experiment ALICE

### Primary author

Pietro Fecchio (Universita e INFN Torino (IT))