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DOE OSTI · 1768452

Institutional Computing: Annual Progress Report, Precision early universe simulations to constrain nuclear reactions and beyond standard model physics

Paris, Mark W.·Grohs, Evan·Fuller, George M.
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Abstract

The current one-year allocation (w20 qburst) is the first year in a two year allocation of the same name. The project has supported two publications in peer-review journals, another manuscript in preparation for publication, a white paper for the Astro2020 Decadal Survey, and a number of talks (see below). Code development continues on implementing a neutrino quantum kinetic equation solver into BURST, now called QBURST. While implementing coherent and forward-scattering processes into the dynamical neutrino evolution equations, multiple numerical issues have appeared. We have remedied a number of these issues through extensive debugging and testing, which include streamlining interpolation and implementing new ODE integration techniques. Further testing is required to solve the problem at a precision of better than one part in 10 6 . We expect that we will understand the numerical difficulties and implement solutions by end of year 2021.

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS74 ATOMIC AND MOLECULAR PHYSICSatomicnuclearparticle physics

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Paris, Mark W., Grohs, Evan, Fuller, George M.. 2021-03-01. Institutional Computing: Annual Progress Report, Precision early universe simulations to constrain nuclear reactions and beyond standard model physics. https://doi.org/10.2172/1768452

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