Underlying-event studies with strange hadrons in <i>pp</i> collisions at √<i>s</i>=13 TeV with the ATLAS detector


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

EUROPEAN PHYSICAL JOURNAL C, cilt.84, sa.12, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 84 Sayı: 12
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1140/epjc/s10052-024-13243-1
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
  • Ankara Üniversitesi Adresli: Evet

Özet

Properties of the underlying-event in pp interactions are investigated primarily via the strange hadrons K-S(0), Lambda and (Lambda) over bar, as reconstructed using the ATLAS detector at the LHC in minimum-bias pp collision data at root s = 13 TeV. The hadrons are reconstructed via the identification of the displaced two-particle vertices corresponding to the decay modes K-S(0) -> pi(+)pi(-), Lambda -> pi(-) p and (Lambda) over bar -> pi(+) (p) over bar. These are used in the construction of underlying-event observables in azimuthal regions computed relative to the leading charged-particle jet in the event. None of the hadronisation and underlying-event physics models considered can describe the data over the full kinematic range considered. Events with a leading charged-particle jet in the range of 10 < p(T) <= 40 GeV are studied using the number of prompt charged particles in the transverse region. The ratio N(Lambda + <(Lambda)over bar>)/N(K-S(0)) as a function of the number of such charged particles varies only slightly over this range. This disagrees with the expectations of some of the considered Monte Carlo models.