391 citations · 2.5k across the 46 of their papers we have counts for
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hep-ph2009★ 44 cited
Constraining chameleon field theories using the GammeV afterglow experiments
A. Upadhye, J. H. Steffen, A. Weltman
The GammeV experiment has constrained the couplings of chameleon scalar fields to matter and photons. Here we present a detailed calculation of the chameleon afterglow rate underly…
hep-ex2009★ 21 cited
The GammeV suite of experimental searches for axion-like particles
Jason H. Steffen, Amol Upadhye
We report on the design and results of the GammeV search for axion-like particles and for chameleon particles. We also discuss plans for an improved experiment to search for chamel…
astro-ph.CO2009★ 123 cited
The existence of relativistic stars in f(R) gravity
Amol Upadhye, Wayne Hu
We refute recent claims in the literature that stars with relativistically deep potentials cannot exist in gravity. Numerical examples of stable stars, including relativisti…