کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10722474 1033773 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Topology of dynamical lattice configurations including results from dynamical overlap fermions
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Topology of dynamical lattice configurations including results from dynamical overlap fermions
چکیده انگلیسی
We investigate how the topological charge density in lattice QCD simulations is affected by violations of chiral symmetry caused by the fermion action. To this end we compare lattice configurations generated with a number of different actions including first configurations generated with exact dynamical overlap quarks. We visualize the topological profiles after mild smearing. In the topological charge correlator we measure the size of the positive core, which is known to shrink to zero extension in the continuum limit. To leading order we find the core size to scale linearly with the lattice spacing with the same coefficient for all actions, even including quenched simulations. In the subleading term the different actions vary over a range of about 10%. Our findings suggest that non-chiral lattice actions at current lattice spacings do not differ much for observables related to topology, both among themselves and compared to overlap fermions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 707, Issue 2, 20 January 2012, Pages 278-285
نویسندگان
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