The talks will be given remotely:
Topic: Israeli joint seminar - Balkin/Caputo
Time: Oct 28, 2020 11:00 AM Jerusalem
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https://technion.zoom.us/j/98260375922?pwd=dDJqdHBSa3pmY3Z5WEs3NEU0aENKZz09
Meeting ID: 982 6037 5922
Passcode: HEP_joint
Reuven will talk about:
Landscape instabilities from finite density effects
Abstract:
We consider finite density...
The talk will be given remotely:
Topic: Israeli joint seminar - Madge/Gouttenorie
Time: Nov 4, 2020 11:00 AM Jerusalem
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https://technion.zoom.us/j/91033490160?pwd=OXJXUWVObWJYNWRRVVpxbTB1OGpCdz09
Meeting ID: 910 3349 0160
Passcode: Hep_joint
Eric will talk about
Constraining Secluded Hidden Sectors with Gravitational Waves
Abstract:
Thermal hidden sectors...
The talks will be given remotely:
Topic: Israeli joint seminar - Minyuan/Shoji
Time: Nov 11, 2020 11:00 AM Jerusalem
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https://technion.zoom.us/j/96420929350?pwd=cVROS014dWFOcHl4OUV1SVh0MUxXQT09
Meeting ID: 964 2092 9350
Passcode: Hep_joint
Minyuan will talk about
Selection rules of scattering amplitudes in EFTs
Abstract:
I will discuss about the selection...
The talk will be given remotely:
Topic: Israeli joint seminar - Agrawal
Time: Nov 18, 2020 11:00 AM Jerusalem
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https://technion.zoom.us/j/96664637589?pwd=UCtQWFYwR0Mwb3VwTDlwMHNtSzM4Zz09
Meeting ID: 966 6463 7589
Passcode: HEP_joint
I will describe and explore the consequences of a newly identified physical phenomenon: volumetric stellar emission into gravitationally bound orbits of weakly coupled particles such as axions, moduli, hidden photons, and fermions. While only a tiny fraction of the instantaneous luminosity of a star (the vast majority of the emission is into relativistic modes), the continual injection of...
Dimension-8 Wilson coefficients in the Standard Model Effective Field Theory (SMEFT) are subject to the so-called “positivity bounds”. They are derived from the axiomatic principles of quantum field theory. In the parameter space spanned by Wilson coefficients, these bounds carve out various kinds of convex bodies and cones. As a result, several concepts and tools from convex geometry are...
In the conventional weakly-interacting massive particle (WIMP) paradigm the late-time density of dark matter (DM) is set by the rate of two-body annihilations, but there has been considerable recent interest in exploring alternative DM scenarios where other interactions control the final abundance. I will show that by fully exploring the parameter space of a simple, weakly-coupled dark sector,...
In this seminar, I will consider the possibility that the totality of dark matter consists of atomic-size black holes of primordial origin. I will review the basics of this proposal, and I will discuss some key questions yet unsolved.
Zoom link: https://us02web.zoom.us/j/87807850062
The QCD axion is a well-motivated dark matter candidate that may also solve the strong CP problem related to the absence of the neutron electric dipole moment. Multiple experimental efforts are currently racing to try to discover this particle in the laboratory. In this talk I will show that astrophysical observations are also a promising path towards detecting the axion and related...
Abstract
Ultra-low-mass bosonic dark matter may form a coherently oscillating classical field. Scalar-type interactions of this field with ordinary matter induce apparent variations of the fundamental “constants”, including the fundamental interaction strengths and particle masses. I discuss how these varying constants can be sought with precision, low-energy (and often table-top-scale)...
As the gravitational evidence accumulates inexorably that dark matter comprises the vast majority of the mass of the universe, the particle nature of dark matter remains a mystery. New laboratory experiments are being commissioned to probe dark matter lighter than the proton mass, but the signature of dark matter in these detectors relies crucially on the condensed matter properties of the...
There are two canonical approaches to treating the Standard Model as an effective field theory: the Standard Model EFT (SMEFT), respecting the full electroweak gauge symmetry, and the Higgs EFT (HEFT), respecting only electromagnetism. Of these, SMEFT has become the predominant approach, both as a framework for the interpretation of LHC Higgs data and as a laboratory for exploring the...
It is well known that the most general renormalizable quantum field theory one can write down for a finite spectrum of spin-0, 1/2, and 1 particles is a gauge theory, with possible spontaneously broken symmetries. The existence of Lie group structures in such a theory is dictated by perturbative unitarity of the on-shell scattering amplitudes. Armed with new tools developed for scattering...
We will discuss some recent results of laboratory searches for ultralight bosonic dark matter (including the recent results from a global network of atomic magnetometers GNOME) and “fifth forces,” and will conclude with a description of the Gamma Factory at CERN---an ambitious proposal of using the LHC as a source of gamma rays with unprecedented intensity and a precision ion trap at the...
Abstract:
The LHCb experiment at the Large Hadron Collider (LHC) at CERN has been the world's premier laboratory for studying processes in which the quark types (or flavors) change since 2011. Such processes are highly sensitive to quantum-mechanical contributions from as-yet-unknown particles, e.g. supersymmetric particles, even those that are too massive to produce at the LHC. I will...
The FASER experiment is a new small and inexpensive experiment that is being placed 480 meters downstream of the ATLAS experiment at the CERN LHC. The experiment will shed light on currently unexplored phenomena, having the potential to make a revolutionary discovery. FASER is designed to capture decays of exotic particles, produced in the very forward region, out of the ATLAS detector...
