351 citations · 1.5k across the 25 of their papers we have counts for
25 papers
Big-bang Nucleosynthesis Enters the Precision Era
David N. Schramm, Michael S. Turner
The last parameter of big-bang nucleosynthesis, the baryon density, is being pinned down by measurements of the deuterium abundance in high-redshift hydrogen clouds. When it is det…
Ultra-high energy cosmic ray sources and large scale magnetic fields
Martin Lemoine, Guenter Sigl, Angela V. Olinto +1
Protons of energies up to 10**20 eV can be subject to significant deflection and energy dependent time delay in lage scale extragalactic or halo magnetic fields of strengths compar…
Deuteronomy and Numbers
David N. Schramm, Michael S. Turner
Four light isotopes - D, ^3He, ^4He and ^7Li - were produced by nuclear reactions a few seconds after the big bang. New measurements of ^3He in the ISM by Gloeckler and Geiss and o…
A Fresh Look at Axions and SN 1987A
Wolfgang Keil, Hans-Thomas Janka, David N. Schramm +3
We re-examine the very stringent limits on the axion mass based on the strength and duration of the neutrino signal from SN 1987A, in the light of new measurements of the axial-vec…
Nuclear Reaction Rates and Primordial Li
Kenneth M. Nollett, Martin Lemoine, David N. Schramm
We examine the possibility that Big Bang Nucleosynthesis (BBN) may produce non-trivial amounts of Li. If a primordial component of this isotope could be observed, it would prov…
Cosmological Neutrino Signatures for Grand Unification Scale Physics
Guenter Sigl, Sangjin Lee, David N. Schramm +1
Physics beyond the standard model might imply the cosmological production of particles with grand unification scale energies. Nucleons and gamma-rays from such processes are candid…