The Mitchell Conference on Collider, Dark Matter, and Neutrino Physics 2023

Session

Dark matter

May 17, 2023, 9:30 AM

Hawking Auditorium (Texas A&M University)

Conveners

Dark matter

• Zackaria Chacko (University of Maryland, College Park)

Dark matter

• Bhupal Dev (Washington University in St. Louis)

4. Blazar constraints on the dark matter - neutrino cross section

Francesc Ferrer Escursell

5/17/23, 9:30 AM

The flux of high energy neutrinos and photons produced in a blazar could get attenuated when they propagate through the dark matter spike around the central black hole and the halo of the host galaxy. Using the observation by IceCube of a few high-energy neutrino events from TXS 0506+056, and their coincident gamma ray events, we obtain new constraints on the dark matter-neutrino and dark...

34. A multi-messenger probe of the nature of neutrino mass

Bhupal Dev (Washington University in St. Louis)

5/17/23, 9:55 AM

Whether neutrinos are Majorana or Dirac particles is an open question. Theoretically, it is also possible that neutrinos are pseudo-Dirac, which are fundamentally Majorana fermions, but essentially act like Dirac fermions in most experimental settings, due to extremely small active-sterile mass splitting. Such small values of mass splitting can only be accessed via active-sterile oscillations...

21. Milli-Magnetic Monopole Dark Matter and the Survival of Galactic Magnetic Fields

Michael Graesser

5/17/23, 10:20 AM

Dark sectors with Abelian gauge symmetries can interact with ordinary matter via kinetic mixing. In such scenarios, magnetic monopoles of a broken dark U (1) will appear in our sector as confined milli-magnetically charged objects under ordinary electromagnetism. If these states contribute sizably to the local dark matter density, they extract significant energy from the galactic magnetic...

8. Dark matter physics: from the early universe to near-field cosmology

Prof. Vera Gluscevic (University of Southern California)

5/18/23, 11:15 AM

Cosmological observables, from the CMB anisotropy to the census of galaxies in the local universe, offer the most direct and broad tests for the nature of dark matter, including a number of scenarios that are challenging or even impossible to test in a laboratory setting. I will review the status of the recent early-universe and late-universe searches for the identity of dark matter,...

17. Composite Dark Matter Through the Neutrino Portal

Can Kilic

5/18/23, 11:40 AM

I will discuss a model where dark matter is a composite state in a hidden sector, interacting with the Standard Model via the neutrino portal. The composite states in the hidden sector interpolated by the portal act as singlet neutrinos, which can naturally explain the existence of small but nonzero neutrino masses via the inverse seesaw mechanism. I will describe the existing constraints on...

29. Dark Matter Misalignment Through the Higgs Portal

Brian Thomas Batell

5/18/23, 12:05 PM

A light singlet scalar field feebly coupled through the super-renormalizable Higgs portal provides a minimal and well-motivated realization of ultra-light bosonic dark matter. We study the cosmological production of dark matter in this model by elucidating the dynamics of two sources of scalar field misalignment generated during the radiation era. For relatively large masses, dark matter is...