Počet záznamů: 1
p-p, p-Lambda, and Lambda-Lambda correlations studied via femtoscopy in pp reactions at root s=7 TeV
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SYSNO ASEP 0503141 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název p-p, p-Lambda, and Lambda-Lambda correlations studied via femtoscopy in pp reactions at root s=7 TeV Tvůrce(i) Acharya, S. (IN)
Adamová, Dagmar (UJF-V) RID, ORCID, SAI
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Broz, M. (CZ)
Contreras, J. G. (CZ)
Horák, D. (CZ)
Křížek, Filip (UJF-V) RID, ORCID, SAI
Kučera, Vít (UJF-V) RID
Kushpil, Svetlana (UJF-V) RID, ORCID, SAI
Lavička, R. (CZ)
Mareš, Jiří A. (FZU-D) RID, ORCID
Petráček, V. (CZ)
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Závada, Petr (FZU-D) RID, ORCIDCelkový počet autorů 1020 Číslo článku 024001 Zdroj.dok. Physical Review C. - : American Physical Society - ISSN 2469-9985
Roč. 99, č. 2 (2019)Poč.str. 21 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova ALICE collaboration ; heavy ion collisions ; LHC Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače Obor OECD Nuclear physics Vědní obor RIV – spolupráce Fyzikální ústav - Elementární částice a fyzika vys. energií CEP LTT17018 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura CERN-CZ - 90058 - Fyzikální ústav AV ČR, v. v. i. Způsob publikování Open access Institucionální podpora FZU-D - RVO:68378271 ; UJF-V - RVO:61389005 UT WOS 000458815800002 EID SCOPUS 85061838893 DOI 10.1103/PhysRevC.99.024001 Anotace We report on the first femtoscopic measurement of baryon pairs, such as p-p, p-Lambda, and Lambda-Lambda, measured by ALICE at the Large Hadron Collider (LHC) in proton-proton collisions at root s = 7 TeV. This study demonstrates the feasibility of such measurements in pp collisions at ultrarelativistic energies. The femtoscopy method is employed to constrain the hyperon-nucleon and hyperon-hyperon interactions, which are still rather poorly understood. A new method to evaluate the influence of residual correlations induced by the decays of resonances and experimental impurities is hereby presented. The p-p, p-Lambda, and Lambda-Lambda correlation functions were fitted simultaneously with the help of a new tool developed specifically for the femtoscopy analysis in small colliding systems: Correlation Analysis Tool using the Schrodinger equation (CATS). Within the assumption that in pp collisions the three particle pairs originate from a common source, its radius is found to be equal to r(0) = 1.125 +/- 0.018 (stat)(-0.035)(+0.058) (syst) fm. The sensitivity of the measured p-Lambda correlation is tested against different scattering parameters, which are defined by the interaction among the two particles, but the statistics is not sufficient yet to discriminate among different models. The measurement of the Lambda-Lambda correlation function constrains the phase space spanned by the effective range and scattering length of the strong interaction. Discrepancies between the measured scattering parameters and the resulting correlation functions at LHC and RHIC energies are discussed in the context of various models. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2020 Elektronická adresa https://doi.org/10.1103/PhysRevC.99.024001
Počet záznamů: 1