Explore the fascinating research on new scalar particles and their impact on neutrinos within the context of supernovae. The study delves into the potential implications for the standard model, dark matter, and various other fundamental physics concepts.
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
Supernova bound on new scalars from resonant (and soft) emission Henry Stubbs University of Oxford 2410.17347, Edward Hardy, Anton Sokolov, HS
Beyond the Standard Model... Neutrino masses Dark matter BSM at low scales? Renormalizable 'portals' Hierarchy problem Strong CP problem Cosmological constant Gravity
Not to scale Supernovae Photons Photons absorbed Neutrinos Neutrinos escape as core cools New scalars scalars contribute to cooling T = 30MeV Dominated by surface emission Can be produced from bulk Want to look at the neutrino signal!
Raffelt bound New energy loss speeds up cooling Shorter neutrino burst Conflict with observations of SN 1987A Raffelt Bound: Energy loss in new degrees of freedom Energy loss in neutrinos ???? 3 1052erg/s Puts strong constraints on particles with masses 1-100 MeV
Ingredients Production rate Many processes Thermal effects Decay and re-absorption rate Leads to the "trapping regime" Realistic* supernova conditions *This is somewhat controversial
Plasma mixing Generated by an electron loop proportional to electron s coupling to both scalar and photon Requires charge conjugation symmetry to be broken by the medium Vanishes when contracted with transverse polarization tensors and satisfies the Ward identity. Lorentz invariant phase space for the fermion
