کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8193044 1528875 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Massive graviton propagation of the deformed Hořava-Lifshitz gravity without projectability condition
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Massive graviton propagation of the deformed Hořava-Lifshitz gravity without projectability condition
چکیده انگلیسی
We study graviton propagations of scalar, vector, and tensor modes in the deformed Hořava-Lifshitz gravity (λR-model) without projectability condition. The quadratic Lagrangian is invariant under diffeomorphism only for λ=1 case, which contradicts to the fact that λ is irrelevant to a consistent Hamiltonian approach to the λR-model. In this case, as far as scalar propagations are concerned, there is no essential difference between deformed Hořava-Lifshitz gravity (λR-model) and general relativity. This implies that there are two degrees of freedom for a massless graviton without Hořava scalar, and five degrees of freedom appear for a massive graviton when introducing Lorentz-violating and Fierz-Pauli mass terms. Finally, it is shown that for λ=1, the vDVZ discontinuity is absent in the massless limit of Lorentz-violating mass terms by considering external source terms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 690, Issue 5, 5 July 2010, Pages 526-533
نویسندگان
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