The Role of Nucleon Strangeness in Supernova Explosions

Abstract

Recent hydrodynamical simulations of supernova (SN) evolution have highlighted the importance of a thorough control over microscopic physics responsible for such internal processes as neutrino heating. In particular, it has been suggested that modifications to the neutrino-nucleon elastic cross section can potentially play a crucial role in producing successful supernova explosions. One possible source of such corrections can be found in a nonzero value for the nucleon's strange helicity content $\Delta s$. In the present analysis, however, we show that theoretical and experimental progress over the past decade has suggested a comparatively small magnitude for $\Delta s$, such that its sole effect is not sufficient to provide the physics leading to supernova explosions.

13 pages, 3 figures. Now updated to published version

References in corpus (6)

• Parton distributions for the LHC
• Iterative Monte Carlo analysis of spin-dependent parton distributions
• Parity-Violating Electron Scattering and the Electric and Magnetic Strange Form Factors of the Nucleon
• Determination of polarized parton distribution functions with recent data on polarization asymmetries
• New analysis concerning the strange quark polarization puzzle
• Constraining nucleon strangeness

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• Core-collapse supernova simulations and the formation of neutron stars, hybrid stars, and black holes
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• A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle Studies
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• Towards a Unified Model of Neutrino-Nucleus Reactions for Neutrino Oscillation Experiments
• Neutrino scattering in supernovae and spin correlations of a unitary gas
• General-relativistic radiation transport scheme in Gmunu II: Implementation of novel microphysical library for neutrino radiation -- Weakhub
• A Bayesian analysis of light-front models and the nucleon's charmed sigma term
• Neutral Current Neutrino-Nucleus Scattering. Theory
• Strange quark helicity in the proton from chiral effective theory
• Helicity-dependent distribution of strange quarks in the proton from nonlocal chiral effective theory
• Stochastic Gravitational-Wave Background from Stellar Core-Collapse Events