Production of meson molecules in ultraperipheral heavy ion collisons

Author:

Sobrinho F. C.1,Abreu L. M.12ORCID,Bertulani C. A.34ORCID,Navarra F. S.1

Affiliation:

1. Universidade de São Paulo

2. Universidade Federal da Bahia

3. Texas A&M University-Commerce

4. Technische Universität Darmstadt

Abstract

In this work we present a calculation of exotic charmonium production in ultraperipheral collisions, in which the exotic state is explicitly treated as a meson molecule. Our formalism is general, but we focus on the lightest possible exotic charmonium state: a D+D molecular bound state. It was proposed some time ago, and it has been an object of experimental searches. Here we study the production of the open charm pair in the process γγD+D. Then we use a prescription to project the free pair |D+D onto a bound state at the amplitude level and compute the cross section of the process γγB (where B is the bound state). Finally, we convolute this last cross section with the equivalent photon distributions coming from the projectile and target in an ultraperipheral collision and find the AAAAB cross section, which, for PbPb collisions at sNN=5.02TeV, is of the order of 3μb. Published by the American Physical Society 2024

Funder

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Fundação de Amparo à Pesquisa do Estado de São Paulo

Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul

Instituto Nacional de Ciência e Tecnologia: Física Nuclear e Aplicações

U.S. Department of Energy

Helmholtz Research Academy Hesse for FAIR

Publisher

American Physical Society (APS)

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