کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8182398 1526764 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heavy Quarkonium Hybrids
ترجمه فارسی عنوان
هیبرید های سنگین کوارکونیم
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
چکیده انگلیسی
We report on a recent investigation on heavy quarkonium hybrids that goes beyond the usual Born-Oppenheimer approximation by including not only the mixing between nearby hybrid states but also the mixing with quarkonium states. We use a systematic effective field theory framework based on NRQCD together with lattice QCD inputs. Short and long distance constraints from weak coupling pNRQCD and the QCD effective string theory are also employed. We calculate the quarkonium and hybrid spectrum for charmonium and bottomonium, and estimate a number of decay widths. Most of the isospin zero XYZ resonances fit in our spectrum either as quarkonia or as hybrid states. The mixing of hybrid states with quarkonia produces enhanced spin symmetry violations, which are instrumental to understand certain decays. We also present new results on the hyperfine splittings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear and Particle Physics Proceedings - Volumes 294–296, January–March 2018, Pages 87-94
نویسندگان
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