Measurement of Charged-Particle Production in sqrt[s_{NN}]=9.62 TeV Proton-Oxygen Collisions as a Probe of Cosmic-Ray Air Showers with the ATLAS Detector


Aad G., Aakvaag E., Abbott B., Abdelhameed S., Abeling K., Abicht N., ...Daha Fazla

Physical review letters, cilt.137, sa.12, ss.121901, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 137 Sayı: 12
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1103/f3nk-5lt9
  • Dergi Adı: Physical review letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, EMBASE, INSPEC, MathSciNet, MEDLINE, zbMATH, DIALNET
  • Sayfa Sayıları: ss.121901
  • Ankara Üniversitesi Adresli: Evet

Özet

This Letter presents a measurement of prompt charged-particle production in proton-oxygen interactions at sqrt[s_{NN}]=9.62 TeV center-of-mass energy with the ATLAS detector, corresponding to 634 μb^{-1} of integrated luminosity. A total of 246×10^{6} selected events have at least one track with transverse momentum p_{T}>500 MeV and pseudorapidity |η|<2.5. The measured fiducial proton-oxygen cross section is σ_{fid.}^{pO}=396±6(exp.)±9(lumi.) mb and the extrapolated inelastic proton-air cross section is σ_{inel.}^{p+air}=406±6(exp.)±9(lumi.)±28(th.) mb. Measurements of charged-particle multiplicity, p_{T}, and η distributions are an order-of-magnitude more precise than differences between hadronic-interaction models. These results enable improved modeling of cosmic-ray air showers, which is important for astroparticle physics.