Letter
Open Access

Production of $X (3872)$ at high multiplicity

Eric Braaten^*, Li-Ping He ^†, and Kevin Ingles ^‡

Jun Jiang ^§

Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA

School of Physics, Shandong University, Jinan, Shandong 250100, China

^*braaten.1@osu.edu
^†he.1011@buckeyemail.osu.edu
^‡ingles.27@buckeyemail.osu.edu
^§jiangjun87@sdu.edu.cn

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Phys. Rev. D 103, L071901 – Published 16 April, 2021

DOI: https://doi.org/10.1103/PhysRevD.103.L071901

Abstract

The dependence of the production of the $X (3872)$ meson on the hadron multiplicity in $p p$ collisions has been used as evidence against $X$ being a charm-meson molecule. The argument is based in part on the incorrect assumption that the cross section for the breakup of $X$ by scattering with comovers can be approximated by a geometric cross section inversely proportional to the binding energy of $X$ . The breakup cross section should instead be approximated by the probability-weighted sum of the cross sections for the scattering of comoving pions from the charm-meson constituents of $X$ , which is insensitive to the binding energy. A simple modification of the comover interaction model gives excellent fits to the data from the LHCb Collaboration on the multiplicity dependence of the production of $X$ and $ψ (2 S)$ using parameters compatible with $X$ being a loosely bound charm-meson molecule.

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References (36)

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Phys. Rev. D 103, L071901– Published 16 April, 2021

Vol. 103, Iss. 7 — 1 April 2021

Received 29 December 2020
Accepted 16 February 2021

DOI: https://doi.org/10.1103/PhysRevD.103.L071901

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Production of $X (3872)$ at high multiplicity

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Production of X(3872) at high multiplicity

Abstract

Physics Subject Headings (PhySH)

Article Text

References (36)

Production of $X (3872)$ at high multiplicity