کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187178 | 1528779 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Color-suppression of non-planar diagrams in bosonic bound states
ترجمه فارسی عنوان
رنگ سرکوب نمودارهای غیر فلاری در حالت های متخلخل بوزونی
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
چکیده انگلیسی
We study the suppression of non-planar diagrams in a scalar QCD model of a meson system in 3+1 space-time dimensions due to the inclusion of the color degrees of freedom. As a prototype of the color-singlet meson, we consider a flavor-nonsinglet system consisting of a scalar-quark and a scalar-antiquark with equal masses exchanging a scalar-gluon of a different mass, which is investigated within the framework of the homogeneous Bethe-Salpeter equation. The equation is solved by using the Nakanishi representation for the manifestly covariant bound-state amplitude and its light-front projection. The resulting non-singular integral equation is solved numerically. The damping of the impact of the cross-ladder kernel on the binding energies are studied in detail. The color-suppression of the cross-ladder effects on the light-front wave function and the elastic electromagnetic form factor are also discussed. As our results show, the suppression appears significantly large for Nc=3, which supports the use of rainbow-ladder truncations in practical non-perturbative calculations within QCD.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 777, 10 February 2018, Pages 207-211
Journal: Physics Letters B - Volume 777, 10 February 2018, Pages 207-211
نویسندگان
J.H. Alvarenga Nogueira, Chueng-Ryong Ji, E. Ydrefors, T. Frederico,