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Andrea Caputo (University of Valencia), Reuven Balkin (Technical University of Munich)28/10/2020, 11:00
The talks will be given remotely:
Topic: Israeli joint seminar - Balkin/Caputo
Time: Oct 28, 2020 11:00 AM JerusalemJoin Zoom Meeting
https://technion.zoom.us/j/98260375922?pwd=dDJqdHBSa3pmY3Z5WEs3NEU0aENKZz09Meeting ID: 982 6037 5922
Passcode: HEP_jointReuven will talk about:
Landscape instabilities from finite density effectsAbstract:
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We consider finite density... -
Mr Eric Madge (Johannes Gutenberg University Mainz), Yann Gouttenoire (Deutsches Elektronen-Synchrotron DESY)04/11/2020, 11:00
The talk will be given remotely:
Topic: Israeli joint seminar - Madge/Gouttenorie
Time: Nov 4, 2020 11:00 AM JerusalemJoin Zoom Meeting
https://technion.zoom.us/j/91033490160?pwd=OXJXUWVObWJYNWRRVVpxbTB1OGpCdz09Meeting ID: 910 3349 0160
Passcode: Hep_jointEric will talk about
Constraining Secluded Hidden Sectors with Gravitational WavesAbstract:
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Thermal hidden sectors... -
Jiang Minyuan (Weizmann Institute of Science ), Yutaro Shoji (KMI, Nagoya University)11/11/2020, 11:00
The talks will be given remotely:
Topic: Israeli joint seminar - Minyuan/Shoji
Time: Nov 11, 2020 11:00 AM JerusalemJoin Zoom Meeting
https://technion.zoom.us/j/96420929350?pwd=cVROS014dWFOcHl4OUV1SVh0MUxXQT09Meeting ID: 964 2092 9350
Passcode: Hep_jointMinyuan will talk about
Selection rules of scattering amplitudes in EFTsAbstract:
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I will discuss about the selection... -
Prateek Agrawal (University of Oxford)18/11/2020, 11:00
The talk will be given remotely:
Topic: Israeli joint seminar - Agrawal
Time: Nov 18, 2020 11:00 AM JerusalemJoin Zoom Meeting
https://technion.zoom.us/j/96664637589?pwd=UCtQWFYwR0Mwb3VwTDlwMHNtSzM4Zz09Meeting ID: 966 6463 7589
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Passcode: HEP_joint -
Ken Van Tilburg (Santa Barbara, KITP)25/11/2020, 16:00
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...
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Cen Zhang (Institute of High Energy Physics, Chinese Academy Sciences)02/12/2020, 11:00
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...
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Patrick Fitzpatrick (Massachusetts Institute of Technology)09/12/2020, 16:00
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,...
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Gadi Afek (Yale )16/12/2020, 11:00
In an attempt to provide further insight into one of the major questions of physics beyond the standard model, new, highly sensitive, optomechanical sensors are employed utilizing techniques synchronous with those of the atomic physics community. These sensors are table-top experimental tools offering exquisite control of mechanical and electrical degrees of freedom and isolation from the...
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Dr Ofri Telem (UC Berkeley)23/12/2020, 16:00
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Alfredo Urbano (Sapienza University of Rome)13/01/2021, 11:00
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
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Jessie Shelton (UIUC)20/01/2021, 16:00
Decoupled hidden sectors in the early universe can easily and generically result in departures from radiation domination prior to Big Bang Nucleosynthesis, leaving a potentially observable footprint in the distribution of dark matter on very small scales. I'll talk about the gravitational consequences of an era of early cannibal domination, which can happen when the lightest particle in a...
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Benjamin Safdi (massachusetts institute of technology)03/02/2021, 17:00
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...
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Dr Yevgeny Stadnik (Kavli IPMU, University of Tokyo)10/02/2021, 11:00
Abstract
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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)... -
Masha Baryakhtar (NYU)17/02/2021, 16:00
I will discuss how black holes can become nature's laboratories for ultralight axions. When a boson's Compton wavelength is comparable to the horizon size of a black hole, energy and angular momentum from the black hole are converted into exponentially growing clouds of bosons, creating a gravitational atom in the sky. Previously open parameter space of axions can be constrained by...
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Toby Opferkuch (CERN)03/03/2021, 11:00
A large abundance of stable muons is an inescapable consequence of high-mass neutron stars. In this talk I will firstly discuss the role of muon diffusion in neutron stars. This can lead to out-of-equilibrium muon decays yielding MeV-scale neutrinos as well as contribution to the neutron star cooling rate. In the second part I will turn to BSM scenarios in which muonic forces play a role in...
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Joachim Kopp (CERN)10/03/2021, 11:00
We will discuss several old and new searches for physics
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beyond the Standard Model in the neutrino sector. The first part of the talk will be devoted to the long-standing short-baseline oscillation anomalies, which we will attempt to explain both within the Standard Model and by going beyond. In the second part of the talk, we will give an overview of possible future searches for physics... -
Yonatan Kahn (University of Illinois at Urbana-Champaign)07/04/2021, 16:00
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...
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Itay Bloch (TAU)05/05/2021, 11:00
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Rebecca Chislett12/05/2021, 11:00
The muon g-2 experiment at Fermilab aims to measure the anomalous magnetic moment of the muon to the unprecedented precision of 140ppb. The current world’s best measurement made at Brookhaven National Laboratory, with a precision of 540ppb, is at odds with the Standard Model theoretical prediction by 3.7 standard deviations. The new experiment is designed to discover whether this two decade...
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Nathaniel Craig (UC Santa Barbara)19/05/2021, 16:00
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...
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Zhewei Yin (Uppsala University)26/05/2021, 11:00
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...
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DMITRY BUDKER (Helmholtz Institute Mainz and UC Berkeley)09/06/2021, 11:00
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...
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J Michael Williams (Massachusetts Inst. of Technology (US))23/06/2021, 16:00
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...
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Anna Sfyrla (Universite de Geneve (CH))21/07/2021, 11:00
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...
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