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Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at sqrt( sNN) = 2.76 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 31 октября 2014 г.
- Авторы: Malinina L., Eyyubova G.H., ALICE C.
- Журнал: Physics Letters B
- Том: 728
- Год издания: 2014
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 216
- Последняя страница: 227
- DOI: 10.1016/j.physletb.2013.11.048
- Аннотация: The production of Ξ− and Ω− baryons and their anti-particles in Pb-Pb collisions at sNN‾‾‾‾√ = 2.76 TeV has been measured using the ALICE detector. The transverse momentum spectra at mid-rapidity (|y|<0.5) for charged Ξ and Ω hyperons have been studied in the range 0.6<pT<8.0 GeV/c and 1.2<pT<7.0 GeV/c, respectively, and in several centrality intervals (from the most central 0-10% to the most peripheral 60-80% collisions). These spectra have been compared with the predictions of recent hydrodynamic models. In particular, the Krak\'ow and EPOS models give a satisfactory description of the data, with the latter covering a wider pT range. Mid-rapidity yields, integrated over pT, have been determined. The hyperon-to-pion ratios are similar to those at RHIC: they rise smoothly with centrality up to ⟨Npart⟩~150 and saturate thereafter. The enhancements (yields per participant nucleon relative to pp collisions) increase both with the strangeness content of the baryon and with centrality, but are less pronounced than at lower energies.
- Добавил в систему: Малинина Людмила Владимировна