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Asymptotic Safety meets Particle Physics & Friends

16โ€“19 Dec 2024
DESY Hamburg
Europe/Zurich timezone

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Session

Talks

16 Dec 2024, 13:45
FLASH experimental hall "Albert Einstein" (DESY Hamburg)

FLASH experimental hall "Albert Einstein"

DESY Hamburg

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  1. 1. Welcome
    Daniel Litim (University of Sussex)
    16/12/2024, 13:45
  2. 2. Probing Quantum Gravity Effects via Magnetic Conversion of Electromagnetic Waves into Gravitational Waves and Vice Versa?
    Andreas Ringwald
    16/12/2024, 14:00
  3. 3. The cosmological constant problem and the effective potential of a gravity-coupled scalar
    Roberto Percacci
    16/12/2024, 14:45
  4. 4. Exploring the Majorana Landscape: Planck Safe Models with Majorana Fermions
    Kai Jรผrgen Spychala
    16/12/2024, 15:45
  5. 5. Avoiding quantum gravity-induced chiral symmetry breaking
    Gabriel Picanco Costa
    16/12/2024, 16:30
  6. 6. Asymptotic Safety and a CPT-Symmetric Universe
    Latham Boyle (Higgs Centre for Theoretical Physics, University of Edinburgh)
    16/12/2024, 17:00

    I will present the idea that the big bang is a type of mirror -- in particular a "CPT mirror". I will review the evidence for this idea, its explanatory power, and its predictions. Recently, we have come to think this idea is closely tied to the asymptotic safety idea, and I will present a new result to this effect (in collaboration with Neil Turok and Vatsalya Vaibhav -- to appear soon).

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  7. 7. Discussion
    16/12/2024, 17:45
  8. 8. A Nonlocal Schwinger Model
    Christopher Herzog
    17/12/2024, 09:30
  9. 9. Emergent Symmetries in 2D Dirac Systems
    Max Uetrecht (TU Dortmund University)
    17/12/2024, 10:15
  10. 10. Dilaton Physics from Asymptotic Freedom
    Charlie Cresswell-Hogg
    17/12/2024, 11:15
  11. 11. Quantum critical Dirac semimetals and finite-temperature effects
    Mireia Tolosa Simeon (Ruhr-Universitรคt Bochum), Mireia Tolosa Simeรณn
    17/12/2024, 12:00

    The chiral Ising-, XY-, and Heisenberg models serve as effective descriptions of Dirac semimetals undergoing a quantum phase transition into a symmetry-broken ordered state. Interestingly, their quantum critical points govern the physical behavior of the system in the vicinity of the transition even at finite temperatures. In this contribution, we explore the chiral models at zero and finite...

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  12. 12. Fixed Points of Quantum Gravity from Dimensional Regularisation
    Mr Yannick Kluth (University of Manchester)
    17/12/2024, 14:00

    We investigate $\beta$-functions of quantum gravity using dimensional regularisation. In contrast to minimal subtraction, a non-minimal renormalisation scheme is employed which is sensitive to power-law divergences from mass terms or dimensionful couplings. By construction, this setup respects global and gauge symmetries, including diffeomorphisms, and allows for systematic extensions to...

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  13. 13. Asymptotic Safety within on-shell perturbation theory
    Renata Ferrero
    17/12/2024, 14:45
  14. 14. Exploring Asymptotically Safe Quantum Gravity on the lattice
    Marc Schiffer (Radboud University Nijmegen)
    17/12/2024, 16:00
  15. 15. Substructures of the Weyl group
    Riccardo Martini (UniBo and INFN - Bologna)
    17/12/2024, 16:45

    I will introduce the concept of restricted Weyl invariances and discuss their advantages for matter fields in curved space and their disadvantages for quantum gravity.

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  16. 16. Discussion
    17/12/2024, 17:30
  17. 17. A seeded electroweak phase transition
    Dr Simone Blasi (DESY)
    18/12/2024, 09:30
  18. 18. UV complete local field theory of persistent symmetry breaking in 2+1 dimensions
    Bilal Hawashin (RUB)
    18/12/2024, 10:15

    Spontaneous symmetry breaking can persist at all temperatures in certain biconical $\mathrm{O}(N)\times \mathbb{Z}_2$ vector models when the underlying field theories are ultraviolet complete. So far, the existence of such theories has been established in fractional dimensions for local but nonunitary models or in 2+1 dimensions but for nonlocal models. Here, we study local models at zero and...

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  19. 19. BSMPT v3 A Tool for Phase Transitions and Primordial Gravitational Waves in Extended Higgs Sectors
    Joรฃo Viana (Faculdade de Ciรชncias da Universidade de Lisboa), Joรฃo Viana
    18/12/2024, 11:15

    Strong first-order phase transitions (SFOPT) during the evolution of the Higgs potential in the early universe not only allow for the dynamical generation of the observed matter-antimatter asymmetry, they can also source a stochastic gravitational wave (GW) background possibly detectable with future space-based gravitational waves interferometers. As SFOPTs are phenomenologically incompatible...

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  20. 20. Planck Safe Phase Transitions in a Complex Singlet Model
    Moritz Bosse (TU Dortmund)
    18/12/2024, 12:00
  21. 21. Entanglement in flavored scalar scattering
    Enrico Maria Sessolo
    18/12/2024, 14:00
  22. 22. Multiloop calculations (with MaRTIn)
    Joachim Brod (University of Cincinnati)
    18/12/2024, 14:45
  23. 23. Extended scalar sectors
    Tania Natalie Robens (Rudjer Boskovic Institute (HR))
    18/12/2024, 15:45
  24. 24. Physical running in higher derivative gravity
    Diego Buccio (SISSA)
    18/12/2024, 16:30

    Running coupling were introduced in quantum filed theory in order to preserve perturbativity in scattering amplitudes, despite the appearance of large logs of external momenta. It is commonly believed that these logarithms are directly related to UV divergencies in one-loop perturbation theory, however this is not completely true in higher derivative theories. On one hand, large logs can...

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  25. 25. Spectral Functions of Lorentzian Quantum Gravity
    Gabriel Assant
    18/12/2024, 17:00
  26. 26. Discussion
    18/12/2024, 17:30
  27. 27. Vacuum Stability in the Standard Model and Beyond
    Tom Steudtner
    19/12/2024, 09:30
  28. 28. Extraction of top quark mass and strong coupling in experiment
    Katerina Lipka (Deutsches Elektronen-Synchrotron (DE))
    19/12/2024, 10:00
  29. 29. TBD
    Geraldine Servant (Deutsches Elektronen-Synchrotron (DE))
    19/12/2024, 11:15
  30. 30. Searching for a dark matter induced galactic axion gradient
    Juri Smirnov
    19/12/2024, 12:00

    An ultra-light axion with CP violating interactions with a dark sector and CP preserving interac- tions with the visible sector can act as a novel portal between dark matter and the Standard Model. In such theories, dark matter sources an axion field extending over the entire galaxy, the gradient of which can be searched for with precise spin precession experiments. A reinterpretation of...

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  31. 31. Discussion and Goodbye
    19/12/2024, 12:30
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