کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10725227 1034103 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Running coupling at finite temperature and chiral symmetry restoration in QCD
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Running coupling at finite temperature and chiral symmetry restoration in QCD
چکیده انگلیسی
We analyze the running gauge coupling at finite temperature for QCD, using the functional renormalization group. The running of the coupling is calculated for all scales and temperatures. At finite temperature, the coupling is governed by a fixed point of the 3-dimensional theory for scales smaller than the corresponding temperature. The running coupling can drive the quark sector to criticality, resulting in chiral symmetry breaking. Our results provide for a quantitative determination of the phase boundary in the plane of temperature and number of massless flavors. Using the experimental value of the coupling at the τ mass scale as the only input parameter, we obtain, e.g., for Nf=3 massless flavors a critical temperature of Tcr≈148 MeV in good agreement with lattice simulations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 645, Issue 1, 1 February 2007, Pages 53-58
نویسندگان
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