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Pion Production via Proton Synchrotron Radiation in Strong Magnetic Fields in Relativistic Field Theory: Scaling Relations and Angular Distributions
Tomoyuki Maruyama, Myung-Ki Cheoun, Toshitaka Kajino +1
We study pion production by proton synchrotron radiation in the presence of a strong magnetic field when the Landau numbers of the initial and final protons are $n_{i,f} \sim 10^4…
Enrichment of r-process elements in dwarf spheroidal galaxies in chemo-dynamical evolution model
Yutaka Hirai, Yuhri Ishimaru, Takayuki R. Saitoh +3
The rapid neutron-capture process (r-process) is a major process to synthesize elements heavier than iron, but the astrophysical site(s) of r-process is not identified yet. Neutron…
Constraints on the birth of the universe and origin of cosmic dark flow
G. J. Mathews, M. R. Gangopadhyay, P. Garnavich +4
We summarize three recent efforts to constrain the first few moments of cosmic creation before and during the epoch of inflation. We consider two means to explain a slight dip in t…
Possible Evidence for Planck-Scale Resonant Particle Production during Inflation from the CMB Power Spectrum
G. J. Mathews, M. R. Gangopadhyay, K. Ichiki +1
The power spectrum of the cosmic microwave background from both the Planck and WMAP data exhibits a slight dip in for multipoles in the range of l=10-30. We show that such a dip co…
Quantum Field Theoretic Treatment of Pion Production via Proton Synchrotron Radiation in Strong Magnetic Fields: Effects of Landau Levels
Tomoyuki Maruyama, Myung-Ki Cheoun, Toshitaka Kajino +3
We study pion production from proton synchrotron radiation in the presence of strong magnetic fields. We derive the exact proton propagator from the Dirac equation in a strong magn…