Phenomenology 2023 Symposium

Session

BSM VI

8 May 2023, 16:30

Lawrence Hall 107

Conveners

BSM VI

• Subhajit Ghosh (University of Notre Dame)

210. A Colorful Mirror Solution to the Strong CP Problem

Claudio Andrea Manzari (UC Berkeley & LBNL)

08/05/2023, 16:30

BSM

I will discuss theories of a complete mirror world with parity (P) solving the strong CP problem. P exchanges the entire Standard Model with its mirror copy and two new mass scales arise: v' where parity and mirror electroweak symmetry are spontaneously broken, and v3 where the color groups break to the diagonal strong interactions. The strong CP problem is solved even if v3 << v' and the...

205. A Twin Higgs Model with SU(4) Color

Logan Page (Brigham Young University)

08/05/2023, 16:45

BSM

Twin Higgs models address the hierarchy problem and can provide interesting dark matter possibilities. However, the cosmology of these models can be problematic.

I present a new twin Higgs model in which the usual color group originates from the spontaneous breaking of a gauged SU(4) symmetry in the visible sector. In the hidden sector the SU(4) is not broken leading to new dark matter...

105. Precision Cosmological Constraints on Atomic Dark Matter

Jared Barron

08/05/2023, 17:00

BSM

Atomic dark matter (aDM) is a simple but highly theoretically motivated possibility for an interacting dark sector that could constitute some or all of dark matter. We perform a comprehensive study of precision cosmological observables on minimal atomic dark matter, exploring for the first time the full parameter space of dark QED coupling and dark electron and proton masses...

156. Simulating Atomic Dark Matter in Milky Way Analogues

Sandip Roy

08/05/2023, 17:15

BSM

Dark sector theories naturally lead to multi-component scenarios for dark matter where a sub-component can dissipate energy through self-interactions, allowing it to efficiently cool inside galaxies. We present the first cosmological hydrodynamical simulations of Milky Way analogues where the majority of dark matter is collisionless Cold Dark Matter (CDM), but a sub-component (6%) is strongly...

193. Probing Atomic Dark Matter using Simulated Galactic Subhalo Populations

Caleb Gemmell (University of Toronto)

08/05/2023, 17:30

BSM

Atomic dark matter (ADM) is a simple extension to the Standard Model that is motivated by considerations in both particle and astrophysics. ADM can alter structure formation on subgalactic scales due to its ability to dissipate energy through cooling mechanisms, but is also one realisation of a possible complex dark sector. These dark sectors have been previously studied as a solution to the...

257. Magnetic Moments of Dark Baryons

Mr Chester Mantel (University of Oregon)

08/05/2023, 17:45

BSM

Dark matter could be dark baryons made from underlying vector-like quarks which interact with the standard model as an electroweak multiplet. If the lightest dark baryon is electrically neutral with vanishing hypercharge, the leading interaction with the SM is anticipated to be through its magnetic dipole (for fermionic dark baryons). Using the non-relativistic quark model, which becomes exact...

195. Dark photons as boosted dark matter

Varun Mathur

08/05/2023, 18:00

BSM

While most of dark matter needs to be cold and nonrelativistic, as we look at dark sectors, a subcomponent could be boosted. We have looked for indirect detection of boosted dark matter at intensity frontier experiments like Super-K, Hyper-K. We propose a simple scenario of looking for dark photons as the boosted subcomponent of dark matter. This can be used to place competitive constraints on...

165. Distortion of neutrino oscillations by dark photon dark matter

Katarina Bleau (Queen's University)

08/05/2023, 18:15

BSM

A weakly coupled and light dark photon coupling to lepton charges $L_\mu-L_\tau$ is an intriguing dark matter candidate that could modify the dynamics of neutrino flavor conversions. By analyzing data from the T2K, SNO, and Super-Kamiokande experiments, limits are obtained on the dark photon gauge coupling for masses below $\sim 10^{-11}\,\mathrm{eV}$. Degeneracies between shifts in the...

199. The continuum dark matter zoo

Ameen Ismail

08/05/2023, 18:30

BSM

I will describe some dark matter models, based mainly on 2210.16326, where the dark matter is described by a gapped continuum, rather than by ordinary particles. The unique kinematics of continuum states leads to a strong suppression of direct detection cross sections, rendering minimal WIMP-like continuum $Z$-portal models phenomenologically viable. Continuum states can decay to lighter...