کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5495047 1528790 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Consistency between SU(3) and SU(2) covariant baryon chiral perturbation theory for the nucleon mass
چکیده انگلیسی
Treating the strange quark mass as a heavy scale compared to the light quark mass, we perform a matching of the nucleon mass in the SU(3) sector to the two-flavor case in covariant baryon chiral perturbation theory. The validity of the 19 low-energy constants appearing in the octet baryon masses up to next-to-next-to-next-to-leading order [1] is supported by comparing the effective parameters (the combinations of the 19 couplings) with the corresponding low-energy constants in the SU(2) sector [2]. In addition, it is shown that the dependence of the effective parameters and the pion-nucleon sigma term on the strange quark mass is relatively weak around its physical value, thus providing support to the assumption made in Ref. [2] that the SU(2) baryon chiral perturbation theory can be applied to study nf=2+1 lattice QCD simulations as long as the strange quark mass is close to its physical value.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 766, 10 March 2017, Pages 325-333
نویسندگان
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