Multi-strange baryon production in pp collisions at root s=7 TeV with ALICE

Abelev, B.; Adam, J.; Adamová, Dagmar; Bielčík, J.; Bielčíková, Jana; Čepila, J.; Křelina, M.; Krus, M.; Kushpil, Svetlana; Kushpil, Vasilij; Mareš, Jiří A.; Petráček, V.; Petráň, M.; Polák, Karel; Pospíšil, V.; Šmakal, R.; Šumbera, Michal; Tlustý, D.; Vajzer, Michal; Wagner, V.; Zach, Č.; Závada, Petr

doi:https://dx.doi.org/10.1016/j.physletb.2012.05.011

Počet záznamů: 1

Multi-strange baryon production in pp collisions at root s=7 TeV with ALICE

1.

SYSNO ASEP	0388916
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Multi-strange baryon production in pp collisions at root s=7 TeV with ALICE
Tvůrce(i)	Abelev, B. (US) Adam, J. (CZ) Adamová, Dagmar (UJF-V)_{RID, ORCID, SAI} Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Čepila, J. (CZ) Křelina, M. (CZ) Krus, M. (CZ) Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Kushpil, Vasilij (UJF-V)_{ORCID, SAI} Mareš, Jiří A. (FZU-D)_{RID, ORCID} Petráček, V. (CZ) Petráň, M. (CZ) Polák, Karel (FZU-D) Pospíšil, V. (CZ) Šmakal, R. (CZ) Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Tlustý, D. (CZ) Vajzer, Michal (UJF-V)_RID Wagner, V. (CZ) Zach, Č. (CZ) Závada, Petr (FZU-D)_{RID, ORCID}
Celkový počet autorů	983
Zdroj.dok.	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 712, 4-5 (2012), s. 309-318
Poč.str.	10 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	multi-strange baryons ; P-T spectra ; mid-rapidity ; proton-proton ; LHC ; ALICE
Vědní obor RIV	BG - Jaderná, atomová a mol. fyzika, urychlovače
CEP	LA08015 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
Institucionální podpora	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	000305378200002
DOI	10.1016/j.physletb.2012.05.011
Anotace	A measurement of the multi-strange Xi(-) and Omega(-) baryons and their antiparticles by the ALICE experiment at the CERN Large Hadron Collider (LHC) is presented for inelastic proton-proton collisions at a centre-of-mass energy of 7 TeV. The transverse momentum (p(T)) distributions were studied at mid-rapidity (vertical bar y vertical bar < 0.5) in the range of 0.6 < p(T) < 8.5 GeV/c Xi(-) for and Xi(+) baryons, and in the range of 0.8 < P-T < 5 GeV/c for Omega(-) and<(Omega)over bar>(+). Baryons and antibaryons were measured as separate particles and we find that the baryon to antibaryon ratio of both particle species is consistent with unity over the entire range of the measurement. The statistical precision of the current data has allowed us to measure a difference between the mean p(T) of Xi(-) ((Xi) over bar)(+) and Omega(-) ((Omega) over bar (+)). Particle yields, mean pi, and the spectra in the intermediate pi range are not well described by the PYTHIA Perugia 2011 tune Monte Carlo event generator, which has been tuned to reproduce the early LHC data. The discrepancy is largest for Omega(-)((Omega) over bar (+)). This PYTHIA tune approaches the pi spectra of Xi(-) and Xi(+) baryons below p(T) <0.85 GeV/c and describes the Xi(-) and Xi(+) spectra above p(T) > 6.0 GeV/c. We also illustrate the difference between the experimental data and model by comparing the corresponding ratios of (Omega(-) +(Omega) over bar (+))/(Xi(-) + Xi(+)) as a function of transverse mass.
Pracoviště	Ústav jaderné fyziky
Kontakt	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Rok sběru	2013

Počet záznamů: 1