کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10726421 | 1035927 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chiral dynamics of baryons in a covariant quark model
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We developed a manifestly Lorentz covariant chiral quark model for the study of baryons as bound states of constituent quarks in an extension of our previous approach. The investigations are related to the ongoing and planned experiments on improved measurements of the elastic baryon form factors and their decay characteristics. The approach is based on a non-linear chirally symmetric Lagrangian, which involves effective degrees of freedom-constituent quarks and the chiral (meson) fields. In a first step, this Lagrangian can be used to perform a dressing of the constituent quarks by a cloud of light pseudoscalar mesons and other heavy states using the calculational technique developed by Becher and Leutwyler. We calculate the dressed transition operators with a proper chiral expansion which are relevant for the interaction of quarks with external fields in the presence of a virtual meson cloud. These operators are used in the calculation of baryon matrix elements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Particle and Nuclear Physics - Volume 55, Issue 1, July 2005, Pages 12-22
Journal: Progress in Particle and Nuclear Physics - Volume 55, Issue 1, July 2005, Pages 12-22
نویسندگان
Amand Faessler, Th. Gutsche, V.E. Lyubovitskij, K. Pumsa-ard,