Szczegóły publikacji
Opis bibliograficzny
Exclusive $J/\psi$, $\psi(2s)$, and $e^{+}e^{−}$ pair production in Au+Au ultraperipheral collisions at the BNL Relativistic Heavy Ion Collider / M. I. Abdulhamid, [et al.], L. ADAMCZYK, [et al.], M. PRZYBYCIEŃ, [et al.] // Physical Review. C ; ISSN 2469-9985. — Tytuł poprz.: Physical Review. C, Nuclear Physics ; ISSN: 0556-2813. — 2024 — vol. 110 iss. 1 art. no. 014911, s. 014911-1–014911-20. — Bibliogr. s. 014911-18–014911-20, Abstr. — Publikacja dostępna online od: 2024-07-31
Autorzy (366)
- AGHAdamczyk Leszek
- AGHPrzybycień Mariusz
- Abdulhamid M. I.
Dane bibliometryczne
| ID BaDAP | 155559 |
|---|---|
| Data dodania do BaDAP | 2024-10-24 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevC.110.014911 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physical Review, C |
Abstract
Measurements of exclusive J/ψ, ψ(2s), and electron-positron (e+e-) pair photoproduction in Au+Au ultraperipheral collisions are reported by the STAR experiment at sNN=200GeV. We report several first measurements at the BNL Relativistic Heavy Ion Collider, which are (i) J/ψ photoproduction with large momentum transfer up to 2.2(GeV/c)2, (ii) coherent J/ψ photoproduction associated with neutron emissions from nuclear breakup, (iii) the rapidity dependence of incoherent J/ψ photoproduction, (iv) the ψ(2s) photoproduction cross section at midrapidity, and (v) e+e- pair photoproduction up to high invariant mass of 6GeV/c2. For measurement (ii), the coherent J/ψ total cross section of γ+Au→J/ψ+Au as a function of the center-of-mass energy WγN has been obtained without photon energy ambiguities. The data are quantitatively compared with the Monte Carlo models STARlight, Sartre, BeAGLE, and theoretical calculations of gluon saturation with color glass condensate, nuclear shadowing with leading twist approximation, quantum electrodynamics, and the next-to-leading-order perturbative QCD. At the photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent J/ψ cross sections of Au nuclei are found to be 71%±10% and 36%±7%, respectively, of that of free protons. These data provide an important experimental constraint for nuclear parton distribution functions and a unique opportunity to advance the understanding of the nuclear modification effect at the top RHIC energy.
