Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV. / ALICE Collaboration.
в: Physical Review C, Том 99, № 2, 024906, 08.02.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Multiplicity dependence of light-flavor hadron production in pp collisions at root s=7 TeV
AU - ALICE Collaboration
AU - Acharya, S.
AU - Acosta, F. T.
AU - Adamová, D.
AU - Adler, A.
AU - Adolfsson, J.
AU - Aggarwal, M. M.
AU - Aglieri Rinella, G.
AU - Agnello, M.
AU - Agrawal, N.
AU - Ahammed, Z.
AU - Ahn, S. U.
AU - Aiola, S.
AU - Akindinov, A.
AU - Al-Turany, M.
AU - Alam, S. N.
AU - Albuquerque, D. S.D.
AU - Aleksandrov, D.
AU - Alessandro, B.
AU - Alfanda, H. M.
AU - Alfaro Molina, R.
AU - Ali, Y.
AU - Alici, A.
AU - Alkin, A.
AU - Alme, J.
AU - Alt, T.
AU - Altenkamper, L.
AU - Altsybeev, I.
AU - Anaam, M. N.
AU - Andrei, C.
AU - Andreou, D.
AU - Andrews, H. A.
AU - Andronic, A.
AU - Angeletti, M.
AU - Anguelov, V.
AU - Anson, C.
AU - Antičić, T.
AU - Antinori, F.
AU - Antonioli, P.
AU - Anwar, R.
AU - Apadula, N.
AU - Aphecetche, L.
AU - Appelshäuser, H.
AU - Arcelli, S.
AU - Arnaldi, R.
AU - Arsene, I. C.
AU - Feofilov, G.
AU - Kovalenko, V.
AU - Vechernin, V.
AU - Zarochentsev, A.
AU - Zherebchevskii, V.
PY - 2019/2/8
Y1 - 2019/2/8
N2 - Comprehensive results on the production of unidentified charged particles, π±, K±, KS0, K∗(892)0, p, p, φ(1020), Λ, Λ, Ξ-, Ξ+, Ω-, and Ω+ hadrons in proton-proton (pp) collisions at s=7 TeV at midrapidity (|y|<0.5) as a function of charged-particle multiplicity density are presented. In order to avoid autocorrelation biases, the actual transverse momentum (pT) spectra of the particles under study and the event activity are measured in different rapidity windows. In the highest multiplicity class, the charged-particle density reaches about 3.5 times the value measured in inelastic collisions. While the yield of protons normalized to pions remains approximately constant as a function of multiplicity, the corresponding ratios of strange hadrons to pions show a significant enhancement that increases with increasing strangeness content. Furthermore, all identified particle-to-pion ratios are shown to depend solely on charged-particle multiplicity density, regardless of system type and collision energy. The evolution of the spectral shapes with multiplicity and hadron mass shows patterns that are similar to those observed in p-Pb and Pb-Pb collisions at Large Hadron Collider energies. The obtained pT distributions and yields are compared to expectations from QCD-based pp event generators as well as to predictions from thermal and hydrodynamic models. These comparisons indicate that traces of a collective, equilibrated system are already present in high-multiplicity pp collisions.
AB - Comprehensive results on the production of unidentified charged particles, π±, K±, KS0, K∗(892)0, p, p, φ(1020), Λ, Λ, Ξ-, Ξ+, Ω-, and Ω+ hadrons in proton-proton (pp) collisions at s=7 TeV at midrapidity (|y|<0.5) as a function of charged-particle multiplicity density are presented. In order to avoid autocorrelation biases, the actual transverse momentum (pT) spectra of the particles under study and the event activity are measured in different rapidity windows. In the highest multiplicity class, the charged-particle density reaches about 3.5 times the value measured in inelastic collisions. While the yield of protons normalized to pions remains approximately constant as a function of multiplicity, the corresponding ratios of strange hadrons to pions show a significant enhancement that increases with increasing strangeness content. Furthermore, all identified particle-to-pion ratios are shown to depend solely on charged-particle multiplicity density, regardless of system type and collision energy. The evolution of the spectral shapes with multiplicity and hadron mass shows patterns that are similar to those observed in p-Pb and Pb-Pb collisions at Large Hadron Collider energies. The obtained pT distributions and yields are compared to expectations from QCD-based pp event generators as well as to predictions from thermal and hydrodynamic models. These comparisons indicate that traces of a collective, equilibrated system are already present in high-multiplicity pp collisions.
KW - PB-PB COLLISIONS
KW - TRANSVERSE-MOMENTUM
KW - FREEZE-OUT
KW - STATISTICAL HADRONIZATION
KW - PARTICLE
KW - RESONANCES
KW - PHYSICS
KW - PROTON
KW - PIONS
KW - MODEL
UR - http://www.scopus.com/inward/record.url?scp=85061298690&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/multiplicity-dependence-lightflavor-hadron-production-pp-collisions-s-7-tev
U2 - 10.1103/PhysRevC.99.024906
DO - 10.1103/PhysRevC.99.024906
M3 - Article
AN - SCOPUS:85061298690
VL - 99
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 2
M1 - 024906
ER -
ID: 38776586