Format results
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Catalysed Vacuum Decay
Michael Nee - University of Oxford
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Hunting for Light DM with Quantum Sensors
Clara Murgui - California Institute of Technology (Caltech)
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Geometry in Scattering Amplitudes
Andreas Helset - California Institute of Technology (Caltech)
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The Irreducible Axion Background
Nadav Outmezguine - University of California, Berkeley
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Shapes of non-Gaussianity in warm inflation
Mehrdad Mirbabayi - Institute for Advanced Study (IAS)
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New ALP probes from light meson decays
Stefania Gori - University of California, Santa Cruz
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Next Generation Axion Dark Matter Searches
Andrew Sonnenschein - Fermi National Accelerator Laboratory (Fermilab)
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Stress as a Background in Dark Matter Direct Detection Experiments and Source of Decoherence in Superconducting Qubits
Roger Romani - University of California, Berkeley
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Signals from the hot and whirly matter produced in heavy-ion collisions
Maelena Tejeda Yeomans - University of Colima
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BBN circa 2022: New Physics hints from the Early Universe?
Mauro Valli - National Institute for Nuclear Physics
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Cosmological Signatures of Interacting Dark Sectors
Melissa Joseph - Boston University
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Catalysed Vacuum Decay
Michael Nee - University of Oxford
Phase transitions in everyday systems are often catalysed by the presence of impurities, but in cosmology we typically assume the initial state is a homogeneous vacuum. In this talk I will discuss how topological defects can seed first order phase transitions in the early universe, causing them to… -
Hunting for Light DM with Quantum Sensors
Clara Murgui - California Institute of Technology (Caltech)
Direct detection experiments search for dark matter through its potential interactions with the SM particles. However, light dark matter models with particle masses below the GeV scale are still largely unconstrained. As we will see in this talk, sensitivity to such small momentum transfer can… -
Geometry in Scattering Amplitudes
Andreas Helset - California Institute of Technology (Caltech)
One central property of the S-matrix is its invariance under field redefinitions. I will discuss how the geometry of field space makes this invariance manifest. This geometric formulation also has practical consequences. Scattering amplitudes and the renormalization group equations for a theory of… -
The Irreducible Axion Background
Nadav Outmezguine - University of California, Berkeley
Searches for dark matter decaying into photons constrain its lifetime to be many orders of magnitude larger than the age of the Universe. A corollary statement is that the abundance of any particle that can decay into photons over cosmological timescales is constrained to be much smaller than the… -
Shapes of non-Gaussianity in warm inflation
Mehrdad Mirbabayi - Institute for Advanced Study (IAS)
Sphaleron heating has been recently proposed as a mechanism to realize warm inflation when inflaton is an axion coupled to pure Yang-Mills. As a result of heating, there is a friction coefficient γ\propto T^3 in the equation of motion for the inflaton, and a thermal contribution to cosmological… -
From KMOC to WQFT in Yang-Mills and gravity
Leonardo de la Cruz - CEA Saclay
Recently, powerful quantum field theory techniques, originally developed to calculate observables in colliders, have been applied to describe classical observables relevant to gravitational wave physics. This has motivated a proliferation of approaches to extract classical information from quantum… -
New ALP probes from light meson decays
Stefania Gori - University of California, Santa Cruz
Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons and pions benefit from their small total decay widths and the availability of very large datasets. In this talk, we first give an overview of new opportunities to… -
Next Generation Axion Dark Matter Searches
Andrew Sonnenschein - Fermi National Accelerator Laboratory (Fermilab)
In the early 1980s, axions and WIMPs were identified as promising dark matter candidates. The last forty years have seen a spectacularly successful experimental program attempting to discover the WIMPs, with sensitivity that has by now improved by many orders of magnitude compared to the earliest… -
Stress as a Background in Dark Matter Direct Detection Experiments and Source of Decoherence in Superconducting Qubits
Roger Romani - University of California, Berkeley
With no hints of dark matter in the "classical WIMP" region of parameter space, experimentalists have begun searching in earnest for low mass (MeV-GeV scale) dark matter. However, efforts to probe this region of parameter space have been hindered by an unexpected and mysterious source of background… -
Signals from the hot and whirly matter produced in heavy-ion collisions
Maelena Tejeda Yeomans - University of Colima
The polarization measurements of particles produced in heavy-ion collisions allow us to study amazing phenomena such as, the collective rotation of the nuclear medium, quark spin-alignment with the global angular momenta, local vs global polarization effects and their evolution when there are… -
BBN circa 2022: New Physics hints from the Early Universe?
Mauro Valli - National Institute for Nuclear Physics
Bang Nucleosynthesis (BBN) is one of the greatest outcome of the Standard Model of Particle Physics when put next to ΛCDM cosmology. In this talk, I will first review the key aspects of standard BBN and illustrate a new code -- PRyMordial -- to make state-of-the-art predictions of primordial light… -
Cosmological Signatures of Interacting Dark Sectors
Melissa Joseph - Boston University
Models of dark sectors with a mass threshold can have important cosmological signatures. If, in the era prior to recombination, a relativistic species becomes non-relativistic and is then depopulated in equilibrium, there can be measurable impacts on the CMB as the entropy is transferred to lighter…