Production of Λ and KS0 in jets in p-Pb collisions at √sNN = 5.02 TeV and pp collisions at √s = 7 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00559779" target="_blank" >RIV/68378271:_____/22:00559779 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/22:00559779

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2022.136984" target="_blank" >https://doi.org/10.1016/j.physletb.2022.136984</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2022.136984" target="_blank" >10.1016/j.physletb.2022.136984</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Production of Λ and KS0 in jets in p-Pb collisions at √sNN = 5.02 TeV and pp collisions at √s = 7 TeV

Popis výsledku v původním jazyce

The production of A baryons and K-S(0) mesons (V-0 particles) was measured in p-Pb collisions at root s(NN) = 5.02 TeV and pp collisions at root s = 7 TeV with ALICE at the LHC. The production of these strange particles is studied separately for particles associated with hard scatterings and the underlying event to shed light on the baryon-to-meson ratio enhancement observed at intermediate transverse momentum (p(T)) in high multiplicity pp and p-Pb collisions. Hard scatterings are selected on an event by-event basis with jets reconstructed with the anti-k(T) algorithm using charged particles. The production of strange particles associated with jets p(T,jet)(ch) > 10 and p(T,jet)(ch) > 20 GeV/c in p-Pb collisions, and with jet p(T,jet)(ch) > 10 GeV/c in pp collisions is reported as a function of p(T). Its dependence on angular distance from the jet axis, R(V-0, jet), for jets with p(T,jet)(ch) > 10 GeV/c in p-Pb collisions is reported as well. The p(T)-differential production spectra of strange particles associated with jets are found to be harder compared to that in the underlying event and both differ from the inclusive measurements. In events containing a jet, the density of the V-0 particles in the underlying event is found to be larger than the density in the minimum bias events. The Lambda/K-S(0) ratio associated with jets in p-Pb collisions is consistent with the ratio in pp collisions and follows the expectation of jets fragmenting in vacuum. On the other hand, this ratio within jets is consistently lower than the one obtained in the underlying event and it does not show the characteristic enhancement of baryons at intermediate p(T) often referred to as 'baryon anomaly' in the inclusive measurements.

Název v anglickém jazyce

Production of Λ and KS0 in jets in p-Pb collisions at √sNN = 5.02 TeV and pp collisions at √s = 7 TeV

Popis výsledku anglicky

The production of A baryons and K-S(0) mesons (V-0 particles) was measured in p-Pb collisions at root s(NN) = 5.02 TeV and pp collisions at root s = 7 TeV with ALICE at the LHC. The production of these strange particles is studied separately for particles associated with hard scatterings and the underlying event to shed light on the baryon-to-meson ratio enhancement observed at intermediate transverse momentum (p(T)) in high multiplicity pp and p-Pb collisions. Hard scatterings are selected on an event by-event basis with jets reconstructed with the anti-k(T) algorithm using charged particles. The production of strange particles associated with jets p(T,jet)(ch) > 10 and p(T,jet)(ch) > 20 GeV/c in p-Pb collisions, and with jet p(T,jet)(ch) > 10 GeV/c in pp collisions is reported as a function of p(T). Its dependence on angular distance from the jet axis, R(V-0, jet), for jets with p(T,jet)(ch) > 10 GeV/c in p-Pb collisions is reported as well. The p(T)-differential production spectra of strange particles associated with jets are found to be harder compared to that in the underlying event and both differ from the inclusive measurements. In events containing a jet, the density of the V-0 particles in the underlying event is found to be larger than the density in the minimum bias events. The Lambda/K-S(0) ratio associated with jets in p-Pb collisions is consistent with the ratio in pp collisions and follows the expectation of jets fragmenting in vacuum. On the other hand, this ratio within jets is consistently lower than the one obtained in the underlying event and it does not show the characteristic enhancement of baryons at intermediate p(T) often referred to as 'baryon anomaly' in the inclusive measurements.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LTT17018" target="_blank" >LTT17018: Získávání nových poznatků o mikrosvětě v infrastruktuře CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

827

Číslo periodika v rámci svazku

APR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

136984

Kód UT WoS článku

000820935000035

EID výsledku v databázi Scopus

2-s2.0-85125843993