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- University of WaterlooCA119 papers
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11 papers · 2 filters
Muon Capture Constraints on Sterile Neutrino Properties
David McKeen, Maxim Pospelov
We show that ordinary and radiative muon capture impose stringent constraints on sterile neutrino properties. In particular, we consider a sterile neutrino with a mass between 40 t…
Big Bang Nucleosynthesis as a Probe of New Physics
Maxim Pospelov, Josef Pradler
Big bang nucleosynthesis (BBN), an epoch of primordial nuclear transformations in the expanding Universe, has left an observable imprint in the abundances of light elements. Precis…
Overcoming Gamma Ray Constraints with Annihilating Dark Matter in Milky Way Subhalos
Aaron C Vincent, Wei Xue, James M Cline
We reconsider Sommerfeld-enhanced annihilation of dark matter (DM) into leptons to explain PAMELA and Fermi electron and positron observations, in light of possible new effects fro…
On theories of enhanced CP violation in B_s,d meson mixing
Michael Trott, Mark B. Wise
The DO collaboration has measured a deviation from the standard model (SM) prediction in the like sign dimuon asymmetry in semileptonic b decay with a significance of 3.2 sigma. We…
Dark Discrete Gauge Symmetries
Brian Batell
We investigate scenarios in which dark matter is stabilized by an abelian Z_N discrete gauge symmetry. Models are surveyed according to symmetries and matter content. Multi-compone…
Metastable GeV-scale particles as a solution to the cosmological lithium problem
Maxim Pospelov, Josef Pradler
The persistent discrepancy between observations of 7Li with putative primordial origin and its abundance prediction in Big Bang Nucleosynthesis (BBN) has become a challenge for the…