Multi-strange baryon production in p-Pb collisions at root(NN)-N-S=5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00460782" target="_blank" >RIV/68378271:_____/16:00460782 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/16:00460782 RIV/68407700:21340/16:00301055

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physletb.2016.05.027" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2016.05.027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2016.05.027" target="_blank" >10.1016/j.physletb.2016.05.027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multi-strange baryon production in p-Pb collisions at root(NN)-N-S=5.02 TeV

Popis výsledku v původním jazyce

The multi-strange baryon yields in Pb-Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, Xi and Omega production rates have been measured with the ALICE experiment as a function of transverse momentum, p(T), in p-Pb collisions at a centre-of-mass energy of,/sNN = 5.02 TeV. The results cover the kinematic ranges 0.6 GeV/c < p(T) < 7.2 GeV/c and 0.8 GeV/c < p(T) < 5 GeV/c, for E and S-2 respectively, in the common rapidity interval 0.5 < ycms < 0. Multi -strange baryons have been identified by reconstructing their weak decays into charged particles. The p(T) spectra are analysed as a function of event charged -particle multiplicity, which in p-Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb-Pb collisions. The measured p -r distributions are compared to the expectations from a Blast -Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p-Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb-Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in p-Pb data, the values of which range from those measured in minimum bias pp to the ones in Pb-Pb collisions. A statistical model qualitatively describes this multiplicity dependence using a canonical suppression mechanism, in which the small volume causes a relative reduction of hadron production dependent on the strangeness content of the hyperon.

Název v anglickém jazyce

Multi-strange baryon production in p-Pb collisions at root(NN)-N-S=5.02 TeV

Popis výsledku anglicky

The multi-strange baryon yields in Pb-Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, Xi and Omega production rates have been measured with the ALICE experiment as a function of transverse momentum, p(T), in p-Pb collisions at a centre-of-mass energy of,/sNN = 5.02 TeV. The results cover the kinematic ranges 0.6 GeV/c < p(T) < 7.2 GeV/c and 0.8 GeV/c < p(T) < 5 GeV/c, for E and S-2 respectively, in the common rapidity interval 0.5 < ycms < 0. Multi -strange baryons have been identified by reconstructing their weak decays into charged particles. The p(T) spectra are analysed as a function of event charged -particle multiplicity, which in p-Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb-Pb collisions. The measured p -r distributions are compared to the expectations from a Blast -Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p-Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb-Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in p-Pb data, the values of which range from those measured in minimum bias pp to the ones in Pb-Pb collisions. A statistical model qualitatively describes this multiplicity dependence using a canonical suppression mechanism, in which the small volume causes a relative reduction of hadron production dependent on the strangeness content of the hyperon.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BF - Elementární částice a fyzika vysokých energií

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

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

—

Svazek periodika

758

Číslo periodika v rámci svazku

JUL

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

389-401

Kód UT WoS článku

000377330500053

EID výsledku v databázi Scopus

2-s2.0-84970027468