کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8198138 | 1528945 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Roles of isoscalar hyperons in probing the density dependence of the nuclear symmetry energy
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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
The role of the isoscalar hyperon Î in probing the density dependence of the nuclear symmetry energy is studied in multi-Î hypernuclei, hyperon-rich matter and neutron stars in relativistic models. Relationships between the properties of three types of objects and the neutron thickness in 208Pb are established with respect to the isoscalar-isovector coupling that modifies the density dependence of the symmetry energy. The exotic isotopes far from the neutron drip line can be stabilized by filling in considerable Î hyperons. The difference of the binding energy of multi-Î hypernuclei from different models is attributed to different symmetry energies. The isovector potential together with the neutron thickness in multi-Î hypernuclei investigated is very sensitive to the isoscalar-isovector coupling. The large sensitivity of the Î hyperon fraction to the isoscalar-isovector coupling occurs at about 2-3Ï0 in beta equilibrated hyperon-rich matter. In neutron stars with hyperonization, an on-off effect with respect to the isoscalar-isovector coupling exists for the neutron star radius.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 642, Issues 1â2, 2 November 2006, Pages 28-33
Journal: Physics Letters B - Volume 642, Issues 1â2, 2 November 2006, Pages 28-33
نویسندگان
W.Z. Jiang,