کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8196267 | 1528918 | 2007 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Energy dependence of ϱ, p and p¯ transverse momentum spectra for Au+Au collisions at sNN=62.4 and 200 GeV
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Energy dependence of ϱ, p and p¯ transverse momentum spectra for Au+Au collisions at sNN=62.4 and 200 GeV Energy dependence of ϱ, p and p¯ transverse momentum spectra for Au+Au collisions at sNN=62.4 and 200 GeV](/preview/png/8196267.png)
چکیده انگلیسی
We study the energy dependence of the transverse momentum (pT) spectra for charged pions, protons and anti-protons for Au+Au collisions at sNN=62.4 and 200 GeV. Data are presented at mid-rapidity (|y|<0.5) for 0.27GeV/c) the modification is similar for both energies. The p/Ï+ and p¯/Ïâ ratios for central collisions at sNN=62.4GeV peak at pTâ2GeV/c. In the pT range where recombination is expected to dominate, the p/Ï+ ratios at 62.4 GeV are larger than at 200 GeV, while the p¯/Ïâ ratios are smaller. For pT>2GeV/c, the p¯/Ïâ ratios at the two beam energies are independent of pT and centrality indicating that the dependence of the p¯/Ïâ ratio on pT does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 655, Issues 3â4, 1 November 2007, Pages 104-113
Journal: Physics Letters B - Volume 655, Issues 3â4, 1 November 2007, Pages 104-113
نویسندگان
STAR Collaboration STAR Collaboration, B.I. Abelev, M.M. Aggarwal, Z. Ahammed, B.D. Anderson, D. Arkhipkin, G.S. Averichev, Y. Bai, J. Balewski, O. Barannikova, L.S. Barnby, S. Baumgart, V.V. Belaga, A. Bellingeri-Laurikainen, R. Bellwied, F. Benedosso,