Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00603304" target="_blank" >RIV/68378271:_____/24:00603304 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/24:00603304 RIV/68407700:21340/24:00380183

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations

Popis výsledku v původním jazyce

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(+/-).

Název v anglickém jazyce

Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations

Popis výsledku anglicky

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(+/-).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

37

Strana od-do

204

Kód UT WoS článku

001350291600001

EID výsledku v databázi Scopus

2-s2.0-85205502715