کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1843369 1645181 2006 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the smallness of the cosmological constant in SUGRA models
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
On the smallness of the cosmological constant in SUGRA models
چکیده انگلیسی

In no-scale supergravity global symmetries protect local supersymmetry and a zero value for the cosmological constant. We consider the breakdown of these symmetries and present a minimal SUGRA model motivated by the multiple point principle, in which the total vacuum energy density is naturally tiny. In order to reproduce the observed value of the cosmological constant and preserve gauge coupling unification, an additional pair of (5+5¯)-plets of superfields has to be included in the particle content of the considered model. These extra fields have masses of the order of the supersymmetry breaking scale; so they can be detected at future colliders. We also discuss the supersymmetry breakdown and possible solution of the cosmological constant problem by MPP in models with an enlarged gauge symmetry.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 743, Issues 1–2, 22 May 2006, Pages 133–152
نویسندگان
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