Generalized cosmological constant from gauging Maxwell-conformal algebra
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, cilt.803, 2020 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 803
- Basım Tarihi: 2020
- Doi Numarası: 10.1016/j.physletb.2020.135295
- Dergi Adı: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH, Directory of Open Access Journals
- Anahtar Kelimeler: Cosmological constant, Gauge field theory, Lie algebra, Modified theory of gravity
- Maltepe Üniversitesi Adresli: Evet
Özet
The Maxwell extension of the conformal algebra is presented. With the help of gauging the Maxwell-conformal group, a conformally invariant theory of gravity is constructed. In contrast to the conventional conformally invariant actions, our gravitational action contains the Einstein-Hilbert term without introducing any additional (compensator) scalar field to satisfy the local scale invariance. This is achieved by using the curvatures of the algebra. In a special condition, we show that the resulting action is reduced to the Brans-Dicke like theory of gravity. We subsequently find the generalized Einstein field equation together with a coordinate dependent cosmological term and additional contributions.