کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8186322 1528773 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Renormalon free part of an ultrasoft correction to the static QCD potential
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Renormalon free part of an ultrasoft correction to the static QCD potential
چکیده انگلیسی
Perturbative calculations of the static QCD potential have the u=3/2 renormalon uncertainty. In the multipole expansion performed within pNRQCD, this uncertainty at LO is known to get canceled against the ultrasoft correction at NLO. To investigate the net contribution remaining after this renormalon cancellation, we propose a formulation to separate the ultrasoft correction into renormalon uncertainties and a renormalon independent part. We focus on very short distances ΛQCDr≲0.1 and investigate the ultrasoft correction based on its perturbative evaluation in the large-β0 approximation. We also propose a method to examine the local gluon condensate, which appears as the first nonperturbative effect to the static QCD potential, without suffering from the u=2 renormalon.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 783, 10 August 2018, Pages 350-356
نویسندگان
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