Conveners
Multimessenger probes of the universe
- Nikos Mavromatos (University of London (GB))
Multimessenger probes of the universe
- Robertus Potting (Universidade do Algarve)
I will review the physics of the highest energy cosmic rays. The discovery of their sources, still unknown, will reveal the most energetic astrophysical objects in the universe and could unveil new physics beyond the standard model of particle physics. We will discuss the details of production and propagation of these high energy particles, and the production of secondary cosmogenic particles...
In this talk, we review recent work on CPT and Lorentz violation in the context of the Standard-Model Extension. In particular, we show that, when CPT and Lorentz violation is present in the kinetic terms of any particle in the gauge boson or the lepton sector, this will generally lead to proton decay at sufficiently high energy. Using observational data from ultra-high energy cosmic rays,...
Extended Icecube (as well as future Tau Airshower array detectors as POEMMA, GRAND) would be soon able to reach a PeVs range of energy where decades of anti-neutrino electron (resonant at Glashow peak) on rest electron may be put in front of muon tracks (born in hadronic interactions) in a weighted statistical way.
The same Tau, Electron and muon ratio weighted with the Glashow signals may...
I will talk the recent works of my group on the speed variations of high energy photons and neutrinos from gamma-ray bursts. By combining high energy photons from a number of GRBs with known redshifts, we reveal a regularity that several high energy photons from different GRBs fall on a same line to indicates a tiny light speed variation at the Lorentz violation scale of 3.6x10^{17} GeV. We...
A possible violation of Lorentz Invariance (LIV) appeared in the late 90s as a striking prediction of some models developed with the goal to provide a full theory of Quantum Gravity (QG). Since then, several ways to probe quantum spacetime at the Planck scale from high-energy gamma-ray observations of distant sources have been followed and provided stringent limits on the energy scale of...
With the detection of neutrinos from the blazar TXS 0506+056, we have reignited the field of multimessenger astronomy using neutrinos. The neutrinos detected by IceCube are in a significantly different energy regime than those detected coincident with Supernova 1987A. In this talk, I will discuss how we can use timing and direction coincidence of neutrinos with identified sources as a probe...
