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Harmonic decomposition of two-particle angular correlations 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: 18 июля 2013 г.
- Авторы: Malinina L.V., Eyyubova G.H., ALICE collaboration
- Журнал: Physics Letters B
- Том: 708
- Номер: 3-5
- Год издания: 2012
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 249
- Последняя страница: 254
- DOI: 10.1016/j.physletb.2012.01.060
- Аннотация: Angular correlations between unidentified charged trigger (t) and associated (a) particles are measured by the ALICE experiment in Pb–Pb collisions at View the MathML source for transverse momenta View the MathML source, where View the MathML source. The shapes of the pair correlation distributions are studied in a variety of collision centrality classes between 0 and 50% of the total hadronic cross section for particles in the pseudorapidity interval |η|<1.0. Distributions in relative azimuth Δϕ≡ϕt−ϕa are analyzed for |Δη|≡|ηt−ηa|>0.8, and are referred to as “long-range correlations”. Fourier components VnΔ≡〈cos(nΔϕ)〉 are extracted from the long-range azimuthal correlation functions. If particle pairs are correlated to one another through their individual correlation to a common symmetry plane, then the pair anisotropy View the MathML source is fully described in terms of single-particle anisotropies vn(pT) as View the MathML source. This expectation is tested for 1⩽n⩽5 by applying a global fit of all View the MathML source to obtain the best values vn{GF}(pT). It is found that for 2⩽n⩽5, the fit agrees well with data up to View the MathML source, with a trend of increasing deviation as View the MathML source and View the MathML source are increased or as collisions become more peripheral. This suggests that no pair correlation harmonic can be described over the full 0.25<pT<15 GeV/c range using a single vn(pT) curve; such a description is however approximately possible for 2⩽n⩽5 when View the MathML source. For the n=1 harmonic, however, a single v1(pT) curve is not obtained even within the reduced range View the MathML source.
- Добавил в систему: Малинина Людмила Владимировна