PIKIMO Fall 2024

Contribution List

2. Radio Detection of Ultra High Energy Neutrinos with Askaryan Radio Array

Dr Paramita Dasgupta (CCAPP Fellow at the Ohio State University)

16/11/2024, 09:05

9:05-10:25

The Askaryan Radio Array (ARA) is an in-ice ultra high energy (UHE, >10 PeV) neutrino experiment at the South Pole that aims to detect UHE-neutrino induced radio emission in ice. ARA consists of five independent stations each consisting of a cubical lattice of in-ice antenna clusters with side length of ~10 m buried at about 200 m below the ice surface. All five independent ARA stations have...

6. How Matter Matters: The Story of Time Invariance Violation in Neutrino Oscillations

Olivia Bitter

16/11/2024, 09:25

9:05-10:25

While neutrino oscillations provide a well motivated probe for CP violation, non-trivial matter effects and our inability to build experiments in an anti-Earth limits our studies to improper tests of its effects. These limitations in turn motivate (from CPT theorem) time invariance studies, as under certain matter potential profiles, proper time invariance and improper time invariance are the...

4. Discovering dark matter at the MUonE experiment

Isaac Wang

16/11/2024, 09:45

9:05-10:25

The MUonE experiment aims to extract the hadronic contribution to the muon anomalous magnetic moment from a precise measurement of the muon-electron differential scattering cross section. We show that MUonE can also discover thermal relic dark matter using only its nominal experimental setup. Our search strategy is sensitive to models of dark matter in which pairs of pseudo-Dirac fermions are...

14. Electroweak-charged Dark Matter and SO(10) Unification with Parity Symmetry

Matthew Baldwin

16/11/2024, 10:05

9:05-10:25

We consider electroweak-charged dark matter in an $SO(10)$ unified theory that solves the strong $CP$ problem via Parity. Electroweak-charged dark matter has a colored $SO(10)$ partner, whose mass should be much above the dark matter mass to avoid cosmological problems arising from the decay of the colored partner. The mass hierarchy can be naturally achieved by an $SO(10)\times CP$ symmetry...

8. Two-Higgs-Doublet Model Effective Field Theory

Keith Hermanek (Indiana University)

16/11/2024, 11:00

11:00-11:40

We introduce the general two-Higgs-doublet model effective field theory where the effects of new physics are parametrized by operators up to mass dimension-six. We discuss the differences of the effective field in four types of two-Higgs-doublet models distinguished by $Z_2$ symmetries which restrict the couplings of the Higgs doublets to Standard Model fermions: type-I, -II, -X, and -Y. We...

9. Looking for Stringy Bosenova

Dawid Brzeminski

16/11/2024, 11:20

11:00-11:40

Black hole superradiance is an exciting tool to probe ultralight fields. In the case of gauge bosons, the buildup of electromagnetic fields in the superradiance cloud can lead to a phase transition, producing dark photon strings. After absorbing energy from the background gauge fields, these strings are ejected from the black hole, forming an expanding cloud. In this talk, we will explore the...

7. A general mass variable flavor number scheme for Z boson production in association with a heavy quark at hadron colliders

Keping Xie (Michigan State University)

16/11/2024, 13:20

1:20-2:00

We present a methodology to streamline implementation of massive-quark radiative contributions in calculations with a variable number of active partons in proton-proton collisions. The methodology introduces subtraction and residual heavy-quark parton distribution functions (PDFs) to implement calculations in the Aivazis-Collins-Olness-Tung (ACOT) factorization scheme and its simplified...

10. Fractionally Charged Particles at the Energy Frontier

Seth Koren (University of Notre Dame)

16/11/2024, 13:40

1:20-2:00

The observed Standard Model is consistent with the existence of vector-like species with electric charge a multiple of e/6. The discovery of a fractionally charged particle would provide nonperturbative information about Standard Model physics, and furthermore rule out some or all of the minimal theories of unification. We discuss the phenomenology of such particles and focus particularly on...

16. Confining conformal colliders

Ameen Ismail

16/11/2024, 15:20

3:20-4:40

Energy correlators are observables that have attracted attention from both collider physics and formal theory. In QCD jets, the two-point energy correlator offers a clean visualization of the confinement transition. I will present a calculation of the two-point correlator in the simplest "hard-wall" holographic model of confinement, with the aim of better understanding confinement through the...

15. Accidental Suppression of Wilson Coefficients in Higgs Coupling

Yunjia Bao (University of Chicago)

16/11/2024, 15:40

3:20-4:40

Higgs couplings are essential probes for physics beyond the Standard Model (BSM) since they can be modified by new physics, such as through the Higgs portal interaction $|H|^2\mathcal{O}$. These modifications influence Higgs interactions via dimension-6 operators of the form $ \left(\partial |H|^2\right)^2$ and $|H|^6$, which are generally expected to be of comparable size. This talk discusses...

13. Geometry and Energy in Effective Field Theories

Dr Benoît Assi (U. Cincinnati)

16/11/2024, 16:00

3:20-4:40

The geometry of field space governs on-shell scattering amplitudes in effective field theories. Extending previous geometric descriptions for scalars and gauge fields, I will discuss how we developed a framework that incorporates fermions into the geometric formulation of effective field theories. Utilizing this field-space geometry, we reorganize and simplify quantum loop corrections,...

5. Baryogenesis from monopole catalysis of baryon decays

Huangyu Xiao (Fermilab)

16/11/2024, 16:20

3:20-4:40

Monopole, generically produced in any Unification theories, can also catalyze baryon decays at an unsuppressed rate, known as the Callan-Rubakov effect. This naturally provides a source of baryon number violation in both the early Universe and late Universe. For the first time, we propose a scenario to produce the primordial baryon asymmetry using the Callan-Rubakov effect and point out...