کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187997 | 1528831 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The five dimensional universal hypermultiplet and the cosmological constant problem
ترجمه فارسی عنوان
فورمتولت پنج بعدی جامع جهانی و مشکل ثابت کیهانشناختی
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
چکیده انگلیسی
We model the universe as a 3-brane embedded in five dimensional spacetime with N=2 supersymmetry. The presence of the scalar fields of the universal hypermultiplet in the bulk results in a positive pressure effectively reducing the value of the cosmological constant and thereby providing a possible answer as to why the measured value of the cosmological constant is many orders of magnitude smaller than predicted from the vacuum energy. The solution allows for any number of parallel branes to exist and relates their cosmological constants (as well as matter densities and radiation pressures) to the value of the dilaton in the extra dimension. The results we find can be thought of as first order approximations, satisfying supersymmetry breaking and the Bogomolʼnyi-Prasad-Sommerfield (BPS) conditions in the bulk only.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 726, Issues 4â5, 4 November 2013, Pages 913-917
Journal: Physics Letters B - Volume 726, Issues 4â5, 4 November 2013, Pages 913-917
نویسندگان
Charles A. Canestaro, Moataz H. Emam,