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Updated: Jul 29, 2025

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
The dominating mode of two competing massive modes of quadratic gravity
Avijit Chowdhury1, Semin Xavier2, S Shankaranarayanan2
1Department of Physics, Indian Institute of Technology Bombay, Mumbai, 400076, India. avijit.phy@iitb.ac.in.
Abstract:
Over the last two decades, motivations for modified gravity have emerged from both theoretical and observational levels. f(R) and Chern-Simons gravity have received more attention as they are the simplest generalization. However, f(R) and Chern-Simons gravity contain only an additional scalar (spin-0) degree of freedom and, as a result, do not include other modes of modified theories of gravity. In contrast, quadratic gravity (also referred to as Stelle gravity) is the most general second-order modification to 4-D general relativity and contains a massive spin-2 mode that is not present in f(R) and Chern-Simons gravity. Using two different physical settings-the gravitational wave energy-flux measured by the detectors and the backreaction of the emitted gravitational radiation on the spacetime of the remnant black hole-we demonstrate that massive spin-2 mode carries more energy than the spin-0 mode. Our analysis shows that the effects are pronounced for intermediate-mass black holes, which are prime targets for LISA.
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