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Leptonic Indirect Detection Signals from Strongly Interacting Asymmetric Dark Matter
Yi Cai, David E. Kaplan, Markus A. Luty
Particles with TeV mass and strong self-interactions generically have the right annihilation cross section to explain an observed excess of cosmic electrons and positrons if the en…
Violating Electrodynamics and Chern-Simons Modified Gravity
Mingzhe Li, Yi-Fu Cai, Xiulian Wang +1
The electrodynamics with a Chern-Simons term violates Lorentz and symmetries with a non-vanishing . For a fixed vector , in this paper we…
Non-singular cosmology in a model of non-relativistic gravity
Yi-Fu Cai, Emmanuel N. Saridakis
We present a model of non-relativistic gravitational theory which is power-counting renormalizable in 3+1 dimensional spacetime. When applied to cosmology, the relativity-violation…
Non-Gaussianity in a Matter Bounce
Yi-Fu Cai, Wei Xue, Robert Brandenberger +1
A nonsingular bouncing cosmology in which the scales of interest today exit the Hubble radius in a matter-dominated contracting phase yields an alternative to inflation for produci…
Cosmic Ray Positrons from Cosmic Strings
Robert Brandenberger, Yi-Fu Cai, Wei Xue +1
We study the spectrum of cosmic ray positrons produced by a scaling distribution of non-superconducting cosmic strings. In this scenario, the positrons are produced from the jets w…