B14: Particle Cosmology

Wed. April 3, 11:21 a.m. – 11:33 a.m. PDT

Ballroom B3, Floor 2

The dark matter (DM) hypothesis explains the gravitational anomalies observed in the rotation of galaxies, galaxy clusters, and the non-homogeneous nature of the cosmic microwave background. The Weakly interacting massive particle (WIMP) paradigm has dominated DM searches for many years now. Although WIMPs are well motivated, the exploration of multi-component DM is imperative for a more diverse search. The Boosted Dark Matter (BDM) model is composed of two DM particles χ₀ and  χ₁, an excited state χ₂ and a U(1)’ gauge boson called the dark photon X. This model incorporates the large-scale impact DM has on the universe by ascribing WIMP-like properties to χ₀, while also allowing for a relativistic component χ₁ to exist for possible surface and underground experimental searches. A unique signal is the inelastic channel (iBDM)  χ₁e^-→χ₂e^-→χ₁(X)e^-→χ₁(e⁺e^-)e^-. The recoil electron in the first interaction along with the electron-positron pair in the final state are unique compared to the neutrino background. I will present the analysis for the search of the iBDM signal in the form of detector senstivity at 90%C.L. in the ICARUS-T600 detector, a Liquid Argon Time Projection Chamber (LArTPC), for the available data from the 2012-2013 run at the Gran Sasso Underground Laboratory in Italy.