Mid-rapidity anti-baryon to baryon ratios in pp collisions at root s=0.9, 2.76 and 7 TeV measured by ALICE

Abbas, E.; Abelev, B.; Adam, J.; Adamová, Dagmar; Bielčík, J.; Bielčíková, Jana; Čepila, J.; Křelina, M.; Krus, M.; Kučera, Vít; Kushpil, Svetlana; Kushpil, Vasilij; Mareš, Jiří A.; Pachr, M.; 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/10.1140/epjc/s10052-013-2496-5

Number of the records: 1

Mid-rapidity anti-baryon to baryon ratios in pp collisions at root s=0.9, 2.76 and 7 TeV measured by ALICE

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SYSNO ASEP	0395989
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Mid-rapidity anti-baryon to baryon ratios in pp collisions at root s=0.9, 2.76 and 7 TeV measured by ALICE
Author(s)	Abbas, E. (EG) 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) Kučera, Vít (UJF-V)_RID Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Kushpil, Vasilij (UJF-V)_{ORCID, SAI} Mareš, Jiří A. (FZU-D)_{RID, ORCID} Pachr, M. (CZ) 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}
Number of authors	984
Source Title	European Physical Journal C. - : Springer - ISSN 1434-6044 Roč. 73, č. 7 (2013), s. 2496
Number of pages	22 s.
Publication form	Print - P
Language	eng - English
Country	US - United States
Keywords	ALICE ; heavy ion collisions
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
Subject RIV - cooperation	Institute of Physics - Elementary Particles and High Energy Physics
R&D Projects	LA08015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LG13031 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	000322575300021
DOI	10.1140/epjc/s10052-013-2496-5
Annotation	he ratios of yields of anti-baryons to baryons probes the mechanisms of baryon-number transport. Results for (p) over bar /p, (Lambda) over bar/Lambda, (Xi) over bar (+)/(Xi) over bar (-) and (Omega) over bar (+)/(Omega) over bar (-) in pp collisions at root s = 0.9, 2.76 and 7 TeV, measured with the ALICE detector at the LHC, are reported. Within the experimental uncertainties and ranges covered by our measurement, these ratios are independent of rapidity, transverse momentum and multiplicity for all measured energies. The results are compared to expectations from event generators, such as PYTHIA and HIJING/B, that are used to model the particle production in pp collisions. The energy dependence of (p) over bar /p, (Lambda) over bar/(Lambda) over bar, (Xi) over bar (+)/(Xi) over bar (-) and (Omega) over bar (+)/(Omega) over bar (-), reaching values compatible with unity for root s = 7 TeV, complement the earlier (p) over bar /p measurement of ALICE. These dependencies can be described by exchanges with the Regge-trajectory intercept of alpha(J) approximate to 0.5, which are suppressed with increasing rapidity interval Delta y. Any significant contribution of an exchange not suppressed at large Delta y (reached at LHC energies) is disfavoured.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2014
Electronic address	http://download.springer.com/static/pdf/389/art%253A10.1140%252Fepjc%252Fs10052-013-2496-5.pdf?auth66=1379854432_f726318e642cdcbe3735b0baa31b020a&ext=.pdf

Number of the records: 1