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Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 25: Struktur und Dynamik von Kernen

HK 25.3: Talk

Tuesday, March 18, 2014, 17:30–17:45, HZ 5

Neutrino interactions with supernova matter — •Alexander Bartl1,2, Christopher J. Pethick3,4, Achim Schwenk2,1, and Maria Voskresenskaya2,11Institut für Kernphysik, Technische Universität Darmstadt — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3The Niels Bohr International Academy, The Niels Bohr Institute, Copenhagen, Denmark — 4NORDITA, Royal Institute of Technology and Stockholm University, Stockholm, Sweden

Neutrino pair bremsstrahlung and absorption (NNNNνν) and inelastic scattering of neutrinos (NNν↔ν NN) are of great relevance for the generation of and energy transport by neutrinos in core-collapse supernovae. In this talk, we will show that in mixtures of protons and neutrons the interaction rates are enhanced at subnuclear densities due to the large scattering lengths. As a result, the rate for neutrino pair bremsstrahlung and absorption is significantly larger below 1013 g cm−3 compared to rates currently used in supernova simulations, which are based on the one-pion-exchange approximation. We will also show further results for neutrino interaction rates up to nuclear densities obtained in the framework of chiral effective field theory.

This work was supported by the Studienstiftung des Deutschen Volkes, ARCHES, the Helmholtz Alliance HA216/EMMI and the ERC Grant No. 307986 STRONGINT.

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