کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10721892 | 1033640 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chiral unitary approach to ηâ²N scattering at low energies
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We study the ηâ²N interaction within a chiral unitary approach which includes ÏN, ηN and related pseudoscalar meson-baryon coupled channels. Since the SU(3) singlet does not contribute to the standard interaction and the ηⲠis mostly a singlet, the resulting scattering amplitude is very small and inconsistent with the experimental scattering length. The additional consideration of vector meson-baryon states into the coupled channel scheme, via normal and anomalous couplings of pseudoscalar to vector mesons, enhances substantially the ηâ²N amplitude. We also exploit the freedom of adding to the Lagrangian a new term, allowed by the symmetries of QCD, which couples baryons to the singlet meson of SU(3). Adjusting the unknown strength to the ηâ²N scattering length, we obtain predictions for the elastic ηâ²Nâηâ²N and inelastic ηâ²NâηN, ÏN, KÎ, KΣ cross sections at low ηⲠenergies, and discuss their significance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 704, Issue 4, 19 October 2011, Pages 334-342
Journal: Physics Letters B - Volume 704, Issue 4, 19 October 2011, Pages 334-342
نویسندگان
E. Oset, A. Ramos,