Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00603304" target="_blank" >RIV/61389005:_____/24:00603304 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/24:00603304 RIV/68407700:21340/24:00380183

Result on the web

<a href="https://doi.org/10.1007/JHEP09(2024)204" target="_blank" >https://doi.org/10.1007/JHEP09(2024)204</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP09(2024)204" target="_blank" >10.1007/JHEP09(2024)204</a>

Result language

angličtina

Original language name

Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations

Original language description

A study of strange hadron production associated with hard scattering processes and with the underlying event is conducted to investigate the origin of the enhanced production of strange hadrons in small collision systems characterised by large charged-particle multiplicities. For this purpose, the production of the single-strange meson K-S(0) and the double-strange baryon Xi is measured, in each event, in the azimuthal direction of the highest-p(T) particle ('trigger' particle), related to hard scattering processes, and in the direction transverse to it in azimuth, associated with the underlying event, in pp collisions at root s = 5.02 TeV and root s = 13 TeV using the ALICE detector at the LHC. The per-trigger yields of K-S(0) and Xi(+/-) are dominated by the transverse-to-leading production (i.e., in the direction transverse to the trigger particle), whose contribution relative to the toward-leading production is observed to increase with the event charged-particle multiplicity. The transverse-to-leading and the toward-leading Xi(+/-)/K-S(0) yield ratios increase with the multiplicity of charged particles, suggesting that strangeness enhancement with multiplicity is associated with both hard scattering processes and the underlying event. The relative production of Xi(+/-) with respect to K-S(0) is higher in transverse-to-leading processes over the whole multiplicity interval covered by the measurement. The K-S(0) and Xi(+/-) per-trigger yields and yield ratios are compared with predictions of three different phenomenological models, namely PYTHIA8.2 with the Monash tune, PYTHIA8.2 with ropes and EPOS LHC. The comparison shows that none of them can quantitatively describe either the transverse-to-leading or the toward-leading yields of K-S(0) and Xi(+/-).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10304 - Nuclear physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Volume of the periodical

2024

Issue of the periodical within the volume

9

Country of publishing house

DE - GERMANY

Number of pages

37

Pages from-to

204

UT code for WoS article

001350291600001

EID of the result in the Scopus database

2-s2.0-85205502715