Generalized cosmological constant from gauging Maxwell-conformal algebra

Kibaroğlu S., Cebecioğlu O.

PHYSICS LETTERS B, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2020
  • Doi Number: 10.1016/j.physletb.2020.135295
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH, Directory of Open Access Journals
  • Keywords: Lie algebra, Gauge field theory, Modified theory of gravity, Cosmological constant, SPONTANEOUSLY BROKEN, SCALE-INVARIANCE, SPACE-TIME, FIELD, EXTENSION, PARTICLE, RELATIVITY, PRINCIPLE, EQUATIONS, SYMMETRY
  • Kocaeli University Affiliated: Yes

Abstract

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. (C) 2020 The Author(s). Published by Elsevier B.V.