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Full-Text Articles in Physics

Dirac Dark Matter, Neutrino Masses, And Dark Baryogenesis, Diego Restrepo, Andrès Rivera, Walter Tangarife Sep 2022

Dirac Dark Matter, Neutrino Masses, And Dark Baryogenesis, Diego Restrepo, Andrès Rivera, Walter Tangarife

Physics: Faculty Publications and Other Works

We present a gauged baryon number model as an example of models where all new fermions required to cancel out the anomalies help to solve phenomenological problems of the standard model (SM). Dark fermion doublets, along with the isosinglet charged fermions, in conjunction with a set of SM-singlet fermions, participate in the generation of small neutrino masses through the Dirac-dark Zee mechanism. The other SM-singlets explain the dark matter in the Universe, while their coupling to an inert singlet scalar is the source of the CP violation. In the presence of a strong first-order electroweak phase transition, this “dark” CP …


Deep Space And The Quantum Mechanical Case: A Study Of Stars To The First Bsu Direct Measurement Of A Singular Photon, Darius Desnoes Aug 2022

Deep Space And The Quantum Mechanical Case: A Study Of Stars To The First Bsu Direct Measurement Of A Singular Photon, Darius Desnoes

Honors Program Theses and Projects

While it is known that physics can be split into several different fields, it may be foreign to see how different fields of physics operate hand in hand with one another to solve complex problems. For instance, Maxwell’s equations involving E&M for the propagation of electro-magnetic waves can be used to understand light-based interferometry for astrophysics, which directly led to the creation of intensity-based interferometry. Eventually, the measurements and equations made by intensity-based interferometry would produce groundbreaking strides in quantum mechanics through the direct measurement of singular particles. An in-depth analysis of each of these connections and how they involved …


Physical Properties Of Brackett Emitters In The Apogee Dr17 Catalog, Elliott Khilfeh, Hunter Campbell, Kevin R. Covey, Marina Kounkel, Richard Ballentyne Apr 2022

Physical Properties Of Brackett Emitters In The Apogee Dr17 Catalog, Elliott Khilfeh, Hunter Campbell, Kevin R. Covey, Marina Kounkel, Richard Ballentyne

WWU Honors College Senior Projects

In the process of accumulating mass (accretion), young stars channel ionized gas from the protoplanetary disk to the stellar surface along magnetic field lines. Upon impacting the photosphere, the gas cools down, recombining and emitting hydrogen spectral lines. Measuring these emission lines allows us to determine the temperature and density of the gas in those accretion streams. This then enables us to test whether those parameters depend on the accretion rate. We present measurements of equivalent widths and line ratios for Brackett (Br) 11 – 20 lines for 3366 observations of 940 pre-main sequence stars observed with APOGEE as of …