کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187490 | 1528830 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-local massive gravity
ترجمه فارسی عنوان
گرانش عظیم غیر محلی
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کلمات کلیدی
جاذبه کوانتومی متضاد، تئوری میدان غیر محلی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
چکیده انگلیسی
We present a general covariant action for massive gravity merging together a class of “non-polynomial” and super-renormalizable or finite theories of gravity with the non-local theory of gravity recently proposed by Jaccard, Maggiore and Mitsou (Phys. Rev. D 88 (2013) 044033). Our diffeomorphism invariant action gives rise to the equations of motion appearing in non-local massive gravity plus quadratic curvature terms. Not only the massive graviton propagator reduces smoothly to the massless one without a vDVZ discontinuity, but also our finite theory of gravity is unitary at tree level around the Minkowski background. We also show that, as long as the graviton mass m is much smaller the todayʼs Hubble parameter H0, a late-time cosmic acceleration can be realized without a dark energy component due to the growth of a scalar degree of freedom. In the presence of the cosmological constant Î, the dominance of the non-local mass term leads to a kind of “degravitation” for Î at the late cosmological epoch.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 727, Issues 1â3, 25 November 2013, Pages 48-56
Journal: Physics Letters B - Volume 727, Issues 1â3, 25 November 2013, Pages 48-56
نویسندگان
Leonardo Modesto, Shinji Tsujikawa,