KIT | KIT-Bibliothek | Impressum | Datenschutz

Measurement of $D^0$ Meson Photoproduction in Ultraperipheral Heavy Ion Collisions

CMS Collaboration; Chekhovsky, V.; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Damanakis, K.; Dragicevic, M.; Giordano, C.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; ... mehr

Abstract:

This Letter reports the first measurement of photonuclear 𝐷$^0$ meson production in ultraperipheral heavy ion collisions. The study is performed using lead-lead collision data, with an integrated luminosity of 1.34  nb$^{−1}$, collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 5.36 TeV. Photonuclear events, where one of the colliding nuclei breaks up and the other remains intact, are selected based on breakup neutron emissions and by requiring no particle activity in a large rapidity interval in the direction of the photon-emitting nucleus. The 𝐷$^0$ mesons are reconstructed via the 𝐷$^0$ →𝐾$^−$⁢𝜋$^+$ decay channel, with the cross section measured as a function of 𝐷$^0$ meson transverse momentum and rapidity. The results are compared with next-to-leading-order perturbative QCD calculations that employ recent parametrizations of the lead nuclear parton distribution functions, as well as with predictions based on the color glass condensate framework. This measurement is the first photonuclear collision study characterizing parton distribution functions of lead nuclei for parton fractional momenta 𝑥 (relative to the nucleon) ranging approximately from a few 10$^{−4}$ to 10$^{−2}$ for different hard energy scale 𝑄$^2$ selections.


Verlagsausgabe §
DOI: 10.5445/IR/1000198045
Veröffentlicht am 16.10.2026
Originalveröffentlichung
DOI: 10.1103/lckg-sdh9
Scopus
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2026
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114
KITopen-ID: 1000198045
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 136
Heft 12
Seiten Art.Nr: 122303
Vorab online veröffentlicht am 26.03.2026
Nachgewiesen in Scopus
OpenAlex
KIT – Die Universität in der Helmholtz-Gemeinschaft
KITopen Landing Page