Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at root s=13 TeV
Year of publication
2020
Authors
The ALICE collaboration; Acharya, S.; Acosta, F. T.; Adam, J.; Adamova, D.; Adler, A.; Adolfsson, J.; Aggarwal, M. M.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahn, S. U.; Aiola, S.; Akindinov, A.; Al-Turany, M.; Alam, S. N.; Albuquerque, D. S. D.; Brucken, E. J.; Chang, B.
Show moreAbstract
The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity (|y|<0.5) are measured in proton-proton collisions at s√ = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of K0S, Λ, Ξ, and Ω increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.
Show moreOrganizations and authors
University of Helsinki
Chang B.
Kim D. J.
Brucken E. J.
Krizek F.
Rytkönen Heidi Maria
Rak J.
Viinikainen J.
Parkkila J. E.
Slupecki M.
Mieskolainen M. M.
Orava R.
Räsänen Sami
Hilden T. E.
Snellman T. W.
Litichevskyi V.
Trzaska W. H.
Zhou Z.
Publication type
Publication format
Article
Parent publication type
Journal
Article type
Original article
Audience
ScientificPeer-reviewed
Peer-ReviewedMINEDU's publication type classification code
A1 Journal article (refereed), original researchPublication channel information
Journal
Parent publication name
Publisher
Volume
80
Issue
2
Article number
167
ISSN
Publication forum
Publication forum level
2
Open access
Open access in the publisher’s service
Yes
Open access of publication channel
Fully open publication channel
Self-archived
Yes
Other information
Fields of science
Physical sciences
Keywords
[object Object]
Publication country
Germany
Internationality of the publisher
International
Language
English
International co-publication
Yes
Co-publication with a company
No
DOI
10.1140/epjc/s10052-020-7673-8
The publication is included in the Ministry of Education and Culture’s Publication data collection
Yes