کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8186724 | 1528775 | 2018 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Baryon masses and Ï terms in SU(3) BChPTâ¯Ãâ¯1/Nc
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
Baryon masses and nucleon Ï terms are studied with the effective theory that combines the chiral and 1/Nc expansions for three flavors. In particular the connection between the deviation of the Gell-Mann-Okubo relation and the Ï term associated with the scalar density u¯u+d¯dâ2s¯s is emphasized. The latter is at lowest order related to a mass combination whose low value has given rise to a Ï term puzzle. It is shown that while the nucleon Ï terms have a well behaved low energy expansion, that mass combination is affected by large higher order corrections non-analytic in quark masses. Adding to the analysis lattice QCD baryon masses, it is found that ÏÏN=69(10) MeV and Ïs has natural magnitude within its relatively large uncertainty.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 781, 10 June 2018, Pages 719-722
Journal: Physics Letters B - Volume 781, 10 June 2018, Pages 719-722
نویسندگان
I.P. Fernando, J.M. Alarcón, J.L. Goity,