Observation of Coherent (Formula presented) Meson Photoproduction in Ultraperipheral PbPb Collisions at (Formula presented)
Yazarlar (1)
Prof. Dr. Hasan OĞUL Sinop Üniversitesi, Türkiye
| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
|
||
| Dergi Adı | Physical Review Letters (Q1) | ||
| Dergi ISSN | 0031-9007 Dergi Bilgileri (2025) | ||
| Makale Dili | İngilizce | Basım Tarihi | 12-2025 |
| Kabul Tarihi | 25-11-2025 | Yayınlanma Tarihi | 22-12-2025 |
| Cilt / Sayı / Sayfa | 135 / 26 / – | DOI | 10.1103/2ssw-wwyy |
| Makale Linki | https://cds.cern.ch/record/2929718 | ||
| UAK Araştırma Alanları |
Fen Bilimleri ve Matematik
|
||
| Özet |
| The first observation of coherent ϕ (1020) meson photoproduction off heavy nuclei is presented using ultraperipheral lead-lead collisions at a center-of-mass energy per nucleon pair of 5.36 TeV. The data were collected by the CMS experiment and correspond to an integrated luminosity of 1.68 µb− 1. The ϕ (1020) meson signals are reconstructed via the K+K− decay channel. The production cross section is presented as a function of the ϕ (1020) meson rapidity in the range 0.3<| y|< 1.0, probing gluons that carry a fraction of the nucleon momentum (x) around 10− 4. The observed cross section exhibits little dependence on rapidity and is significantly suppressed, by a factor of∼ 5, compared to a baseline model that treats a nucleus as a collection of free nucleons. Theoretical models that incorporate either nuclear shadowing or gluon saturation predict suppression of the ϕ (1020) meson cross section with only a small dependence on rapidity, but the magnitude of the predicted suppression varies greatly. Models considering only nuclear shadowing effects result in the best agreement with the experimental data. This study establishes a powerful new tool for exploring nuclear effects and nuclear gluonic structure in the small-x regime at a unique energy scale bridging the perturbative and nonperturbative quantum chromodynamics domains. |
| Anahtar Kelimeler |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Web of Science | 1 |
| Scopus | 2 |
| Google Scholar | 8 |