Flavor Changing Supersymmetry Interactions in a Supernova

Abstract

We consider for the first time R-parity violating interactions of the Minimal Standard Supersymmetric Model involving neutrinos and quarks (``flavor changing neutral currents'', FCNC's) in the infall stage of stellar collapse. Our considerations extend to other kinds of flavor changing neutrino reactions as well. We examine non-forward neutrino scattering processes on heavy nuclei and free nucleons in the supernova core. This investigation has led to four principal original discoveries/products: (1) first calculation of neutrino flavor changing cross sections for spin one half (e.g. free nucleon) and spin zero nuclear targets; (2) discovery of nuclear mass number squared (A squared) coherent amplification of neutrino-quark FCNC's; (3) analysis of FCNC-induced alteration of electron capture and weak/nuclear equilibrium in the collapsing core; and (4) generalization of the calculated cross sections (mentioned in 1) for the case of hot heavy nuclei to be used in collapse/supernova and neutrino transport simulations. The scattering processes that we consider allow electron neutrinos to change flavor during core collapse, thereby opening holes in the electron neutrino sea, which allows electron capture to proceed and results in a lower core electron fraction. A lower electron fraction implies a lower homologous core mass, a lower shock energy, and a greater nuclear photo-disintegration burden for the shock. In addition, unlike the standard supernova model, the core now could have net muon and/or tau lepton numbers. These effects could be significant even for supersymmetric couplings below current experimental bounds.

22 pages, 7 figures, typos corrected, abstract modifided, minor additions to content

References in corpus (3)

• Stability of Standing Accretion Shocks, With an Eye Toward Core Collapse Supernovae
• The consequences of nuclear electron capture in core collapse supernovae
• Solar neutrinos as probes of neutrino-matter interactions

Cited by in corpus (28)

• Probing new physics with coherent neutrino scattering off nuclei
• Prospects for measuring coherent neutrino-nucleus elastic scattering at a stopped-pion neutrino source
• Lepton masses, mixings and FCNC in a minimal S_3-invariant extension of the Standard Model
• Probing non-standard neutrino interactions with supernova neutrinos
• Sensitivity to Z-prime and non-standard neutrino interactions from ultra-low threshold neutrino-nucleus coherent scattering
• Constraints on Non-Standard Neutrino Interactions and Unparticle Physics with Neutrino-Electron Scattering at the Kuo-Sheng Nuclear Power Reactor
• Recent probes of standard and non-standard neutrino physics with nuclei
• Flavor-dependent radiative corrections in coherent elastic neutrino-nucleus scattering
• Nonstandard neutrino-neutrino refractive effects in dense neutrino gases
• Standard and non-standard neutrino-nucleus reactions cross sections and event rates to neutrino detection experiments
• Possible CP-Violation effects in core-collapse Supernovae
• S_3-flavour symmetry as realized in lepton flavour violating processes
• Nuclear aspects of neutral current non-standard $\nu$-nucleus reactions and the role of the exotic ${\mu }^{-}\to e^{-}$ transitions experimental limits
• Interplay between collective effects and non-standard interactions of supernova neutrinos
• Neutrino transition magnetic moments within the non-standard neutrino-nucleus interactions
• Stellar Collapse Dynamics With Neutrino Flavor Changing Neutral Currents
• Constraints on Scalar-Pseudoscalar and Tensorial Non-Standard Interaction and Tensorial Unparticle Couplings from Neutrino-Electron Scattering
• SUSY radiative corrections on mu-tau neutrino refraction including possible R-parity breaking interactions
• Weak Interaction Rate Coulomb Corrections in Big Bang Nucleosynthesis
• Dedicated Supernova Detection by a Network of Neutral Current Spherical TPC's
• Lepton flavour violating processes in an S_3-symmetric model
• Probing neutrino nature at Borexino detector with chromium neutrino source
• Neutrino elastic scattering on polarized electrons as a tool for probing the neutrino nature
• TeV-scale bileptons, see-saw type II and lepton flavor violation in core-collapse supernova
• Supernovae as laboratories for neutrino properties
• Lepton flavor violating New Physics and supernova explosion
• mu->e Gamma decay versus mu->eee bound and lepton flavor violating processes in supernova
• Azimuthal asymmetry of recoil electrons in neutrino-electron elastic scattering as signature of neutrino nature