کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5494828 | 1528783 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The isospin dependent nucleon-nucleon inelastic cross section in the nuclear medium
ترجمه فارسی عنوان
مقیاس ناپیوانی نوکلئون-نوکلون وابسته به ایزوپن در محیط هسته ای
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
چکیده انگلیسی
The calculation of the energy-, density-, and isospin-dependent Î production cross sections in nucleon-nucleon (NN) scattering ÏNNâNÎâ has been performed within the framework of the relativistic BUU approach. The NÎ cross sections are calculated in Born approximation taking into account the effective mass splitting of the nucleons and Îs in asymmetric matter. Due to the different mass splitting for neutron, proton and differently charged Îs, it is shown that, similar to the NN elastic ones, the reductions of NÎ inelastic cross sections in isospin-asymmetric nuclear medium are different from each other for all the individual channels and the effect is largest and of opposite sign for the Î++ and Îâ states. This approach is also compared to calculations without effective mass splitting and with splitting derived from Dirac-Brueckerner (DB) calculations. The isospin dependence of the NÎ cross sections is expected to influence the production of Ï+ and Ïâ mesons as well as their yield ratio, and thus affect the use of the latter quantity as a probe of the stiffness of the symmetry energy at supranormal densities.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 773, 10 October 2017, Pages 557-562
Journal: Physics Letters B - Volume 773, 10 October 2017, Pages 557-562
نویسندگان
Qingfeng Li, Zhuxia Li,