Multiplicity dependence of light-flavor hadron production in pp collisions at √s = 7 TeV
Journal article
| Authors | Barnby, Lee |
|---|---|
| Abstract | Comprehensive results on the production of unidentified charged particles, π±, K±, K0S, K∗(892)0, p, p̅, ϕ(1020), Λ, Λ̅, Ξ−, Ξ̅+, Ω−, and Ω̅+ 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 |
| Keywords | Large hadron collider, high energy physics, particle production |
| Year | 2019 |
| Journal | Physical Review C |
| Journal citation | 99 (2) |
| Publisher | American Physical Society |
| ISSN | 2469-9985 |
| 2469-9993 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1103/PhysRevC.99.024906 |
| Web address (URL) | http://hdl.handle.net/10545/623657 |
| http://creativecommons.org/licenses/by-sa/3.0/us/ | |
| hdl:10545/623657 | |
| Publication dates | 08 Feb 2019 |
| Publication process dates | |
| Deposited | 10 Apr 2019, 13:41 |
| Accepted | 08 Feb 2019 |
| Rights | Attribution-ShareAlike 3.0 United States |
| Contributors | STFC Daresbury Laboratory |
| File | File Access Level Open |
| File | File Access Level Open |
https://repository.derby.ac.uk/item/94946/multiplicity-dependence-of-light-flavor-hadron-production-in-pp-collisions-at-s-7-tev
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