**Gian Francesco Giudice**

In an imaginary conversation with Guido Altarelli, I express my views on the status of particle physics beyond the Standard Model and its future prospects.

read more at https://arxiv.org/pdf/1710.07663.pdf

# Asides

# Quantum Information and Spacetime

John Preskill, Caltech

QIP 2017, 15 Jan 2017

http://www.theory.caltech.edu/~preskill/talks/QIP2017-tutorial-Preskill.pdf

# Quantum papers of 2016

1. The Mathematics of Entanglement

Fernando G.S.L. Brandao, Matthias Christandl, Aram W. Harrow, Michael Walter: https://arxiv.org/pdf/1604.01790.pdf

2. Quantum Shannon Theory

John Preskill: https://arxiv.org/pdf/1604.07450.pdf

# What Happens When Energy Goes Missing?

Article: Performance of algorithms that reconstruct missing transverse momentum in √s = 8 TeV proton-proton collisions in the ATLAS detector

Authors: The ATLAS Collaboration

Reference: arXiv:1609.09324

The ATLAS experiment recently released a note detailing the nature and performance of algorithms designed to calculate what is perhaps the most difficult quantity in any LHC event: missing transverse energy. Missing transverse energy (MET) is so difficult because by its very nature, it is missing, thus making it unobservable in the detector. So where does this missing energy come from, and why do we even need to reconstruct it?

Read more at http://www.particlebites.com/?p=4441

# Eugene Paul Wigner’s Nobel Prize

**Y.S. Kim**

In 1963, Eugene Paul Wigner was awarded the Nobel Prize in Physics for his contributions to the theory of the atomic nucleus and the elementary particles, particularly through the discovery and application of fundamental symmetry principles. There are no disputes about this statement. On the other hand, there still is a question of why the statement did not mention Wigner’s 1939 paper on the Lorentz group, which was regarded by Wigner and many others as his most important contribution in physics. By many physicists, this paper was regarded as a mathematical exposition having nothing to do with physics. However, it has been more than one half century since 1963, and it is of interest to see what progress has been made toward understanding physical implications of this paper and its historical role in physics. Wigner in his 1963 paper defined the subgroups of the Lorentz group whose transformations do not change the four-momentum of a given particle, and he called them the little groups. Thus, Wigner’s little groups are for internal space-time symmetries of particles in the Lorentz-covariant world. Indeed, this subgroup can explain the electron spin and spins of other massive particles. However, for massless particles, there was a gap between his little group and electromagnetic waves derivable Maxwell’s equations. This gap was not completely removed until 1990. The purpose of this report is to review the stormy historical process in which this gap is cleared. It is concluded that Wigner’s little groups indeed can be combined into one Lorentz-covariant formula which can dictate the symmetry of the internal space-time time symmetries of massive and massless particles in the Lorentz covariant world, just like Einstein’s energy-momentum relation applicable to both slow and massless particles.

Read more at https://arxiv.org/pdf/1610.01740v1.pdf

# CERN Discovers New Particle Called The FERIR

CERN has just announced the discovery of a new particle, called the “FERIR”. This is not a fundamental particle of matter like the Higgs Boson, but an invention of …

Read more at https://yanisvaroufakis.eu/2016/10/01/cern-discovers-new-particle-called-the-ferir-guest-post-by-steve-keen/

# Neutrino Astrophysics

**Cristina Volpe**

We summarize the progress in neutrino astrophysics and emphasize open issues in our understanding of neutrino flavor conversion in media. We discuss solar neutrinos, core-collapse supernova neutrinos and conclude with ultra-high energy neutrinos.

Read more at http://arxiv.org/pdf/1609.06747v1.pdf