Szczegóły publikacji
Opis bibliograficzny
First measurement of the $|t|-dependence$ of coherent $J/\psi$ photonuclear production / S. Acharya, [et al.], P. J. KONOPKA, G. Kornakov, S. D. KORYCIAK, [et al.] // Physics Letters. B ; ISSN 0370-2693. — 2021 — vol. 817 art. no. 136280, s. 1–13. — Bibliogr. s. 7–8, Abstr. — Publikacja dostępna online od: 2021-04-15. — P. J. Konopka - dod. afiliacja: European Organization for Nuclear Research (CERN), Geneva, Switzerland
Autorzy (1007)
- AGHKonopka Piotr
- AGHKoryciak Sebastian
- Acharya Shreyasi
Dane bibliometryczne
| ID BaDAP | 133947 |
|---|---|
| Data dodania do BaDAP | 2021-05-05 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physletb.2021.136280 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp | |
| Creative Commons | |
| Czasopismo/seria | Physics Letters, B |
Abstract
The first measurement of the cross section for coherent J/ψ photoproduction as a function of |t| , the square of the momentum transferred between the incoming and outgoing target nucleus, is presented. The data were measured with the ALICE detector in ultra-peripheral Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02TeV with the J/ψ produced in the central rapidity region |y|<0.8 , which corresponds to the small Bjorken- x range (0.3−1.4)×10−3 .The measured |t| -dependence is not described by computations based only on the Pb nuclear form factor, while the photonuclear cross section is better reproduced by models including shadowing according to the leading-twist approximation, or gluon-saturation effects from the impact-parameter dependent Balitsky–Kovchegov equation. These new results are therefore a valid tool to constrain the relevant model parameters and to investigate the transverse gluonic structure at very low Bjorken- x.