PIKIMO Fall 2023

Session

Afternoon session

11 Nov 2023, 16:00

119 (Swain Hall West)

7. ALP-assisted electroweak phase transition and baryogenesis

Isaac Wang

11/11/2023, 16:00

Axion-like particles (ALPs) can be naturally lighter than the electroweak scale. We consider an ALP that couples to the Standard Model Higgs to achieve the strong first-order electroweak phase transition. We discuss the two-field dynamics of the phase transition and the associated computation in detail and identify the viable parameter space. The ALP mass can be from the MeV to GeV scale....

13. Isosinglet vectorlike leptons at $e^+e^-$ colliders

Prudhvi Bhattiprolu (University of Michigan)

11/11/2023, 16:15

We study weak isosinglet vectorlike leptons that decay through a small mixing with the tau lepton, for which the discovery and exclusion reaches of the Large Hadron Collider and future proposed hadron colliders are limited. We show how an $e^+ e^-$ collider may act as a discovery machine for these $\tau^{\prime}$ particles, demonstrate that the $\tau^{\prime}$ mass peak can be reconstructed...

12. Entanglement and Symmetry in Low-energy QCD

Qiaofeng Liu (Northwestern University)

11/11/2023, 16:30

Quantum information science offers a fresh perspective to think about quantum field theory. In this talk, I look at the connection between entanglement and symmetries in low-energy scattering of spin-$\frac{1}{2}$ baryons. The baryons transform as an octet under the $SU(3)$ flavor symmetry and their interactions below the pion threshold are described by contact operators in an effective field...

15. The search for Neutrinoless Double Beta Decay in Germanium

Mr Nafis Fuad (Indiana University)

11/11/2023, 16:45

Physicists around the world have been trying to detect an extremely rare, but not invalidated by Standard Model, decay process called neutrinoless double beta decay (0vBB) in Ge since the late 1960s. Two recent experiments, Majorana and GERDA, have pushed the frontier by setting the limit of half-life to be ~10^26 years using ~40 kg of 76Ge. This result eventually also puts an upper limit on...