Multiplicity dependence of Γ production at forward rapidity in pp collisions at √<i>s</i>=13 TeV


Acharya S., Adamová D., Adler A., Aglieri Rinella G., Agnello M., Agrawal N., ...Daha Fazla

NUCLEAR PHYSICS B, cilt.1011, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1011
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.nuclphysb.2024.116786
  • Dergi Adı: NUCLEAR PHYSICS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC, MathSciNet, zbMATH, Directory of Open Access Journals
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The measurement of Gamma(1S), Gamma(2S), and Gamma(3S) yields as a function of the charged-particle multiplicity density, dN(ch)/d eta, using the ALICE experiment at the LHC, is reported in pp collisions at root s = 13 TeV. The Gamma meson yields are measured at forward rapidity (2.5 < y < 4) in the dimuon decay channel, whereas the charged-particle multiplicity is defined at central rapidity (vertical bar eta vertical bar < 1). Both quantities are divided by their average value in minimum bias events to compute the self-normalized quantities. The increase of the self-normalized Gamma(1S), Gamma(2S), and Gamma(3S) yields is found to be compatible with a linear scaling with the self-normalized dN(ch)/d eta, within the uncertainties. The self-normalized yield ratios of excited-to-ground Gamma states are compatible with unity within uncertainties. Similarly, the measured double ratio of the self-normalized Gamma(1S) to the self-normalized J/psi yields, both measured at forward rapidity, is compatible with unity for self-normalized charged-particle multiplicities beyond one. The measurements are compared with theoretical predictions incorporating initial or final state effects.