Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration


Aad G., Abat E., Abbott B., Abdallah J., Abdelalim A. A., Abdesselam A., ...Daha Fazla

PHYSICS LETTERS B, cilt.688, sa.1, ss.21-42, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 688 Sayı: 1
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.physletb.2010.03.064
  • Dergi Adı: PHYSICS LETTERS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.21-42
  • Anahtar Kelimeler: Charged-particle, Multiplicities, 900 GeV, ATLAS, LHC, Minimum bias, TRANSVERSE-MOMENTUM SPECTRA, SQUARE-ROOT-S, CM ENERGIES, DISTRIBUTIONS, COLLISIONS, MASS
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range vertical bar eta vertical bar < 2.5 and p(T) > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity eta = 0 is measured to be 1.333 +/- 0.003(stat.) +/- 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. 2010 Published by Elsevier B.V.