Phenomenology 2022 Symposium: From Virtual to Real

Session

Theory I

9 May 2022, 16:30

Lawrence Hall 203

Conveners

Theory I

• Rudrajit Banerjee (University of Pittsburgh)

123. Cosmological Collider Physics using Primordial Clocks and Clicks

Reza Ebadi

09/05/2022, 16:30

Signatures of the heavy particles produced on-shell during the inflationary era can be imprinted on cosmological correlation functions, thereby offering a unique opportunity to probe particle spectra at energy scales far beyond the energies achievable with any conceivable terrestrial collider. These heavy particle signatures, however, are generally Boltzmann-suppressed, limiting the potential...

32. Missing Scalars at the Cosmological Collider

Qianshu Lu

09/05/2022, 16:45

Light scalar fields typically develop spatially varying backgrounds during inflation. Very often they do not directly affect the density perturbations, but interact with other fields that do leave nontrivial signals in primordial perturbations. In this sense they become "missing scalars" at the cosmological collider. We study potentially observable signals of these missing scalars, focusing on...

79. Asymmetric Reheating by Primordial Black Holes

Barmak Shams Es Haghi (University of Utah)

09/05/2022, 17:00

We investigate Hawking evaporation of a population of primordial black holes (PBHs) prior to
Big Bang Nucleosynthesis (BBN) as a mechanism to achieve asymmetric reheating of two sectors
coupled solely by gravity. While the visible sector is reheated by the inflaton or a modulus, the dark
sector is reheated by PBHs. Compared to inflationary or modular reheating of both sectors, there
are...

80. Kaluza-Klein Portal Matter

GEORGE WOJCIK

09/05/2022, 17:15

In models of thermal dark matter with MeV-GeV masses, a common simplified construction relies on a U(1) dark sector (and corresponding dark photon of MeV-GeV mass) which kinetically mixes with the Standard Model (SM) hypercharge to serve as a mediator to achieve the observed relic abundance. This kinetic mixing will arise at one-loop order if the theory includes so-called "portal matter"--...

53. Flavored gauge-mediated supersymmetry breaking models with discrete non-Abelian symmetries

SHU TIAN EU

09/05/2022, 17:30

We investigate flavored gauge mediation models in which the Higgs and messenger doublets are embedded in multiplets of the discrete non-Abelian symmetry S3. In these theories, the S3 symmetry correlates the flavor structure of the quark and lepton Yukawa couplings with the structure of the messenger Yukawa couplings that contribute to the soft supersymmetry breaking mass parameters. We provide...

174. Towards an All-Orders Flavor Formalism in the (geo)SM(EFT) and Beyond

Jim Talbert

09/05/2022, 17:45

I will present novel model- and basis-independent formulae for calculating fermionic mass, mixing and CP-violation parameters given arbitrary 3x3 complex Yukawa couplings of the fundamental Lagrangian. The formalism is applicable to any construction whose Yukawas transform under certain global U(3) flavor symmetries, including the Standard Model (SM), numerous popular SM extensions and, as I...

68. Acausality in Superfluid Dark Matter and MOND-like Theories

Neil Shah

09/05/2022, 18:00

There has been much interest in novel models of dark matter that exhibit interesting behavior on galactic scales. A primary motivation is the observed Baryonic Tully-Fisher Relation in which the mass of galaxies increases as the quartic power of rotation speed. This scaling is not obviously accounted for by standard cold dark matter. This has prompted the development of dark matter models that...