کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8190980 | 1528861 | 2012 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Harmonic decomposition of two particle angular correlations in Pb-Pb collisions at sNN=2.76TeV
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Angular correlations between unidentified charged trigger (t) and associated (a) particles are measured by the ALICE experiment in Pb-Pb collisions at sNN=2.76TeV for transverse momenta 0.25pTa. 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 ÎÏâ¡ÏtâÏa are analyzed for |Îη|â¡|ηtâηa|>0.8, and are referred to as “long-range correlations”. Fourier components VnÎâ¡ãcos(nÎÏ)ã 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 VnÎ(pTt,pTa) is fully described in terms of single-particle anisotropies vn(pT) as VnÎ(pTt,pTa)=vn(pTt)vn(pTa). This expectation is tested for 1⩽n⩽5 by applying a global fit of all VnÎ(pTt,pTa) to obtain the best values vn{GF}(pT). It is found that for 2⩽n⩽5, the fit agrees well with data up to pTaâ¼3-4GeV/c, with a trend of increasing deviation as pTt and pTa are increased or as collisions become more peripheral. This suggests that no pair correlation harmonic can be described over the full 0.25
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 708, Issues 3â5, 28 February 2012, Pages 249-264
Journal: Physics Letters B - Volume 708, Issues 3â5, 28 February 2012, Pages 249-264
نویسندگان
ALICE Collaboration ALICE Collaboration, K. Aamodt, B. Abelev, A. Abrahantes Quintana, D. Adamová, A.M. Adare, M.M. Aggarwal, G. Aglieri Rinella, A.G. Agocs, A. Agostinelli, S. Aguilar Salazar, Z. Ahammed, N. Ahmad, A. Ahmad Masoodi, S.U. Ahn,