Kavli Affiliate: Gordan Krnjaic | First 5 Authors: LDMX Collaboration, LDMX Collaboration, , , | Summary: The Light Dark Matter eXperiment (LDMX) is proposed to employ a thin tungsten target and a multi-GeV electron beam to carry out a missing momentum search for the production of dark matter candidate particles. We study the sensitivity for […]
Kavli Affiliate: Emil J. Martinec | First 5 Authors: Emil J. Martinec, Emil J. Martinec, , , | Summary: Supergravity solutions describing supersymmetric rotating bound states of NS fivebranes, fundamental strings and momentum can sometimes have an ergoregion but no horizon. In such supersymmetric ergoregions, there is an unusual feature that there exist BPS "excitations" […]
Kavli Affiliate: Alexander P. Ji | First 5 Authors: Anirudh Chiti, Anirudh Chiti, , , | Summary: Stars that contain only trace amounts of elements heavier than helium, referred to as having low "metallicity", preserve the chemical fingerprints of the first generation of stars and supernovae. In the Milky Way, the lowest metallicity stars show […]
Kavli Affiliate: Alexander P. Ji | First 5 Authors: Vedant Chandra, Vedant Chandra, , , | Summary: The fifth-generation Sloan Digital Sky Survey (SDSS-V) is conducting the first all-sky low-resolution spectroscopic survey of the Milky Way’s stellar halo. We describe the stellar parameter pipeline for the SDSS-V halo survey, which simultaneously models spectra, broadband photometry, […]
Kavli Affiliate: Thomas Crawford | First 5 Authors: Jorge Garcia, Jorge Garcia, , , | Summary: After analyzing the 4×4 determinant of a matrix, a shortcut was obtained to find such a determinant. Similarly to the Sarrus method for 2×2 or 3×3 determinants, the method consists of laying 19 columns of size 4 each and […]
Kavli Affiliate: Gordan Krnjaic | First 5 Authors: Dan Hooper, Dan Hooper, , , | Summary: We explore a simple and predictive dark matter scenario involving a complex scalar field, $phi$, coupled to the Higgs portal with no additional field content. In the UV, the field possesses a global $U(1)$ symmetry which is broken by […]
Kavli Affiliate: Katrin Heitmann | First 5 Authors: Stephen A. Walsh, Stephen A. Walsh, , , | Summary: Understanding the structure of our universe and the distribution of matter is an area of active research. As cosmological surveys grow in complexity, the development of emulators to efficiently and effectively predict matter power spectra is essential. […]
Kavli Affiliate: Austin Joyce | First 5 Authors: Kurt Hinterbichler, Kurt Hinterbichler, , , | Summary: We describe a Higgs mechanism for the partially massless graviton. In order to do so, we first construct a covariant fracton-like effective field theory on de Sitter space that linearly realizes a dipolar shift symmetry. The global symmetry of […]
Kavli Affiliate: Eric Oberla | First 5 Authors: Jaime Álvarez-Muñiz, Jaime Álvarez-Muñiz, , , | Summary: The Giant Radio Array for Neutrino Detection (GRAND) is an envisioned observatory of ultra-high-energy particles of cosmic origin, with energies in excess of 100 PeV. GRAND uses large surface arrays of antennas to look for the radio emission from […]
Kavli Affiliate: Michael D. Gladders | First 5 Authors: Joseph F. V. Allingham, Joseph F. V. Allingham, , , | Summary: Massive galaxy clusters act as prominent strong-lenses. Due to a combination of observational biases, cluster evolution and lensing efficiency, most of the known cluster lenses lie typically at $z_lsim0.2-0.7$, with only a few prominent […]