TY - JOUR
T1 - Charged-particle production as a function of multiplicity and transverse spherocity in pp collisions at root s=5.02 and 13 TeV
AU - Acharya, S.
AU - Torals-Acosta, F.
AU - Adam, J.
AU - Adamova, D.
AU - Adler, A.
AU - Adolfsson, J
AU - Aggarwal, MM.
AU - Aglieri Rinella, G.
AU - Agnello, Maria
AU - Agrawal, N.
AU - Bearden, Ian
AU - Gaardhøje, Jens Jørgen
AU - rtc312, rtc312
AU - Bourjau, Christian Alexander
AU - Vislavicius, Vytautas
AU - Pacik, Vojtech
AU - Nielsen, Børge Svane
AU - Gajdosova, Katarina
AU - bsm989, bsm989
AU - Thoresen, Freja
AU - Bilandzic, Ante
AU - Chojnacki, Marek
AU - Zhou, You
AU - Alice Collaboration
PY - 2019/10/1
Y1 - 2019/10/1
N2 - We present a study of the inclusive charged-particle transverse momentum (pT) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity, d Nch/ d η, in pp collisions at s=5.02 and 13 TeV covering the kinematic range | η| < 0.8 and 0.15 < pT< 20 GeV/c. The results are presented for events with at least one charged particle in | η| < 1 (INEL>0). The pT spectra are reported for two multiplicity estimators covering different pseudorapidity regions. The pT spectra normalized to that for INEL>0 show little energy dependence. Moreover, the high-pT yields of charged particles increase faster than the charged-particle multiplicity density. The average pT as a function of multiplicity and transverse spherocity is reported for pp collisions at s=13 TeV. For low- (high-) spherocity events, corresponding to jet-like (isotropic) events, the average pT is higher (smaller) than that measured in INEL>0 pp collisions. Within uncertainties, the functional form of ⟨ pT⟩ (Nch) is not affected by the spherocity selection. While EPOS LHC gives a good description of many features of data, PYTHIA overestimates the average pT in jet-like events.
AB - We present a study of the inclusive charged-particle transverse momentum (pT) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity, d Nch/ d η, in pp collisions at s=5.02 and 13 TeV covering the kinematic range | η| < 0.8 and 0.15 < pT< 20 GeV/c. The results are presented for events with at least one charged particle in | η| < 1 (INEL>0). The pT spectra are reported for two multiplicity estimators covering different pseudorapidity regions. The pT spectra normalized to that for INEL>0 show little energy dependence. Moreover, the high-pT yields of charged particles increase faster than the charged-particle multiplicity density. The average pT as a function of multiplicity and transverse spherocity is reported for pp collisions at s=13 TeV. For low- (high-) spherocity events, corresponding to jet-like (isotropic) events, the average pT is higher (smaller) than that measured in INEL>0 pp collisions. Within uncertainties, the functional form of ⟨ pT⟩ (Nch) is not affected by the spherocity selection. While EPOS LHC gives a good description of many features of data, PYTHIA overestimates the average pT in jet-like events.
U2 - 10.1140/epjc/s10052-019-7350-y
DO - 10.1140/epjc/s10052-019-7350-y
M3 - Journal article
SN - 1434-6044
VL - 79
JO - European Physical Journal C
JF - European Physical Journal C
IS - 10
M1 - 857
ER -