# ICHEP 2022

Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

## Impact of production mechanism of the enigmatic $X(3872)$ on its structure

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

#### Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Strong interactions and Hadron Physics

Antoni Szczurek

### Description

We report on our recent results on production mechanism of the famous $X(3872)$ meson [1] which structure is not well known. We calculate the total cross section and transverse momentum distributions for the production of enigmatic $\chi_{c,1}(3872)$ (or X(3872)) assuming different scenarios:
$c \bar c$ state and $D^{0*} {\bar D}^0 + D^0 {\bar D}^{0*}$ molecule.
The derivative of the $c \bar c$ wave function needed in the first scenario is taken from a potential model calculations. Compared to earlier calculation of molecular state we include not only
single parton scattering (SPS) but also double parton scattering (DPS) contribution. The latter one seems to give smaller contribution than the SPS one. The upper limit for the DPS production of $\chi_{c,1}(3872)$ is much below the CMS data. We compare results of our calculations with existing experimental data of CMS, ATLAS and LHCb collaborations. Reasonable cross sections can be obtained in either $c \bar c$ or molecular $D {\bar D}^*$ scenarios for $X(3872)$. Also a hybrid scenario is not excluded.

[1] A. Cisek, W. Schaefer and A. Szczurek,
arXiv:2203.07827.

In-person participation Yes

### Primary authors

Anna Cisek (Institute of Nuclear Physics PAN, Krakow) Wolfgang Schaefer (Institute of Nuclear Physics PAN)

### Presentation materials

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