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Crossroads between Theory and Phenomenology

10–28 Jun 2024
CERN
Europe/Zurich timezone

TH workshop secretariat

Contribution List

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  1. 3. Welcome
    Matthew Philip Mccullough (CERN)
    10/06/2024, 09:45
  2. 1. Shining axions through astrophysical walls
    Benjamin Safdi
    10/06/2024, 10:00
  3. 2. More Axion Stars from Strings
    Marco Gorghetto (DESY)
    10/06/2024, 11:30

    We show that if dark matter consists of QCD axions in the post-inflationary scenario more than ten percent of it efficiently collapses into Bose stars at matter-radiation equality. Such a result is mostly independent of the present uncertainties on the axion mass. This large population of solitons, with asteroid masses and Earth-Moon distance sizes, might plausibly survive until today, with...

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  4. 4. Gravitational Wave-Induced Freeze-In of Fermionic Dark Matter
    Azadeh Maleknejad
    11/06/2024, 10:00
  5. 5. Where to Look and How to Look for High-Frequency Gravitational Waves
    Raffaele D'Agnolo (CEA IPhT Saclay)
    11/06/2024, 11:30

    Abstract: Stochastic backgrounds of gravitational waves can potentially open a window on extremely high energies, giving us information on phase transitions at the GUT scale and many other BSM phenomena. In this talk I will discuss simple heuristic arguments that allow to establish the smallest detectable energy density in a primordial gravitational wave background. I will focus mainly on what...

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  6. 6. Stability of Superconducting Strings
    Wei Xue (University of Florida (US))
    11/06/2024, 15:00
  7. 7. Simulating Stochastic Gravitational Waves from Early Structure Formation
    Joshua Foster (Massachusetts Institute of Technology)
    12/06/2024, 10:00

    Gravitational wave detectors provide a chance to observe the state of the very early universe and have important sensitivities for studies of early universe cosmology and searches for physics beyond the Standard Model. In this talk, I will discuss the production of potentially detectable stochastic gravitational wave backgrounds in early matter dominated eras in the linear and nonlinear...

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  8. 8. The Strong CP Problem in String Theory (Cosmo+Swampland meeting)
    Jakob Ulrich Moritz
    12/06/2024, 11:30
  9. 40. TH colloquium by Krishna Rajagopal, "Novel Probes of the Primordial Liquid"
    12/06/2024, 14:00

    Please check details on https://indico.cern.ch/event/1384507/

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  10. 10. QCD axion strings or seeds?
    Dr Simone Blasi (DESY)
    13/06/2024, 10:00
  11. 11. Dynamical Generation of the Baryon Asymmetry from a Scale Hierarchy
    Jae Hyeok Chang (Fermilab and UIC)
    13/06/2024, 11:30

    Abstract: We propose a novel baryogenesis scenario where the baryon asymmetry originates directly from a hierarchy between two fundamental mass scales: the electroweak scale and the Planck scale. Our model is based on the neutrino-portal Affleck-Dine (AD) mechanism, which generates the asymmetry of the AD sector during the radiation-dominated era and subsequently transfers it to the baryon...

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  12. 12. Cosmological Production of ROMP Dark Matter
    David Dunsky
    13/06/2024, 15:00

    Rapidly Oscillating Massive Particles (ROMPs) arise in quantum systems with non-diagonal interaction mass matrices. This misalignment between flavor and mass eigenstates leads to oscillations such as those between electron and muon neutrinos in the Standard Model, or between active and sterile neutrinos in Beyond the Standard Model frameworks to name just a few examples. In this talk, I will...

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  13. 13. Axion dark matter from kinetic misalignment
    Geraldine Servant (Deutsches Elektronen-Synchrotron (DE))
    14/06/2024, 10:00

    Kinetic misalignment enables axion DM at low axion axion decay constant, which is particularly relevant for the whole experimental programme af axion searches. I’ll discuss its distinctive features such as axion fragmentation and its signatures, as well as
    UV implementations of rotating axions.

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  14. 14. Probing the dark sector with Large Scale Structure
    Ennio Salvioni (University of Sussex (GB))
    14/06/2024, 11:30
  15. 41. Welcome
    Matthew Philip Mccullough (CERN)
    17/06/2024, 11:25
  16. 15. Shadow Matter
    David Kaplan
    17/06/2024, 11:30

    I will argue that there are quantum states of the field theories of general relativity and electromagnetism that we typically ignore, but have interesting phenomenological effects. These states amount to loosening the constraint equations known as the Hamiltonian and momentum constraints in GR and Gauss’ law in EM. Turning off the Hamiltonian constraint sources non-dynamical parts of the...

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  17. 16. Continuous-Spin Particles, On Shell
    Brando Bellazzini
    17/06/2024, 15:00
  18. 17. n-shell relations between effective field theories of gluons
    Quentin Bonnefoy (DESY)
    18/06/2024, 10:00

    It is known that universal algebraic structures govern the scattering amplitudes of a large web of theories, whose boundaries are however not well understood. In this talk, I will comment on effective field theory deformations of this web. Focussing on tree-level dynamics, I will explain that the scattering amplitudes of gluons minimally coupled to adjoint scalars contain all of the...

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  19. 18. Vignettes from Strongly-Coupled Dark Sectors
    Graham Kribs
    18/06/2024, 11:30

    I’ll discuss three recent developments related to dark glueball, dark meson, and dark baryon theory and phenomenology. Along the way we’ll see the continued importance of prompt and long-lived searches at LHC, as well as a surprising symmetry impacting dark baryon direct detection that appears in a broad class of strongly-coupled dark sectors.

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  20. 19. Learning new tricks with the Higgs?
    Christoph Englert, Christoph Peter Englert (University of Glasgow (GB))
    18/06/2024, 15:00
  21. 20. A different view on colliders
    Mr Marc Riembau (CERN)
    19/06/2024, 10:00

    Energy correlators do live at the crossroads between theory and phenomenology. I will briefly review developments on both fronts that explain the resurgence of interest on these old observables. Then, I present how to compute high point correlators from recursion relations, what can be learned from low point ones, and how to go beyond energies.

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  22. 21. Higgs Shift-Symmetries
    Javi Serra (IFT)
    19/06/2024, 11:30
  23. 22. New physics on the run from precision tests - TH colloquium
    Sophie Alice Renner (University of Glasgow (GB))
    19/06/2024, 14:00
  24. 23. Non-decoupling new particles
    David Sutherland
    20/06/2024, 10:00
  25. 24. Probing ultralight dark matter with gravity wave detectors
    Hyungjin Kim
    20/06/2024, 11:30
  26. 25. Matching EFT to LHC
    Markus Luty (University of California Davis)
    20/06/2024, 15:00
  27. 26. Non-invertible Naturalness and Quantum Flavodynamics
    Seth Koren (University of Notre Dame)
    21/06/2024, 10:00
  28. 27. Strong gauge dynamics and BSM model building tools
    Hitoshi Murayama (University of California Berkeley (US))
    21/06/2024, 11:30

    Many attractive ideas on BSM physics involve strong gauge dynamics we do not understand well. I present recent attempts to gain better understanding of strong gauge dynamics using supersymmetry and anomaly mediation of supersymmetry breaking. Then I speculate on areas of BSM model building that they may open up.

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  29. 42. Welcome
    Tim Cohen (CERN)
    24/06/2024, 11:25
  30. 30. Talk
    T. Daniel Brennan
    24/06/2024, 11:30
  31. 29. Particle Physics meets Gravitational Wave Physics
    Mr Jung-Wook Kim
    24/06/2024, 15:00

    I will give an overview of how quantum field theory—the main tool of particle physics—is applied to the study of relativistic two-body problem, how it is relevant to precision measurements in future gravitational wave observatories, and how it connects to my research in this topic; the effects of spin in binary dynamics.

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  32. 31. A holographic view of the QCD axion
    Tony Gherghetta
    25/06/2024, 10:00
  33. 32. Axion couplings as UV probes
    Michael Nee (Harvard University)
    25/06/2024, 11:30
  34. 33. Geometry of Scattering Amplitudes
    Andreas Helset (CERN)
    25/06/2024, 15:00
  35. 34. Hamiltonian Truncation and Effective Field Theory
    Kara Michelle Farnsworth (Universite de Geneve (CH))
    26/06/2024, 10:00
  36. 28. On-shell techniques for the standard-model effective theory
    Gauthier Durieux (CP3 - UCLouvain)
    26/06/2024, 11:30
  37. 9. Thinking Outside the Hypercube: RS and its Implications - TH colloquium
    lisa randall (harvard)
    26/06/2024, 14:00
  38. 35. Gravitational waves from domain walls bounded by inflated cosmic strings
    Liantao Wang
    27/06/2024, 10:00
  39. 36. The quantum width of a causal diamond
    Kathryn Zurek (Caltech)
    27/06/2024, 11:30
  40. 37. Topological Portal to the Dark Sector: from EFT to UV
    Joseph Enea Davighi
    27/06/2024, 15:00
  41. 38. SU(N) and O(N) Representation Theory at non-integer N
    Xiaochuan Lu (University of California, San Diego)
    28/06/2024, 10:00

    The standard representation theory for SU(N) and O(N) groups are defined at positive integer N. However, cases of non-integer N are often encountered, e.g. when studying dimensional regularization, evanescent operators, conformal bootstrap, etc. A natural continuation to non-integer N (such as N=3.99) is to take the one at infinitely large integer N. This contains representations with...

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  42. 39. Abelian Instantons and Monopole Scattering
    Ofri Telem (The Hebrew University of Jerusalem)
    28/06/2024, 11:30

    It is usually assumed that 4D instantons can only arise in non-Abelian theories. In our recent work arXiv:2406.13738, we re-examine this conventional wisdom by explicitly constructing instantons in an Abelian gauge theory: $QED_4$ with $N_f$ flavors of Dirac fermions, in the background of a Dirac monopole. This is the low-energy effective field theory for fermions interacting with a 't...

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