Kavli Affiliate: Gordan Krnjaic | Summary:We propose a novel cosmological scenario in which baryonic neutron stars could plausibly form in the early universe. If baryogenesis initially produces an excessively-large baryon asymmetry, $Y_B gg 10^-10,$ the baryonic mass inside the horizon can exceed the minimum neutron star mass before big bang nucleosynthesis (BBN). While this large […]
Kavli Affiliate: Thomas Crawford | Summary:Recent cosmological data reveal tension between parameters inferred from measurements of the cosmic microwave background (CMB), baryon acoustic oscillations (BAO), and supernovae (SN) under $Λ$CDM. Typical dynamical dark energy parameterizations (such as $w_0w_a$) that seek to jointly resolve these tensions have an equation of state parameter that crosses into the […]
Kavli Affiliate: Alexander Ji | Summary:The first multimessenger discovery of a binary neutron star (BNS) merger, GW170817, proved that such mergers can source short gamma-ray bursts (SGRBs) and produce rprocess elements. The initial merger rate from this single event in the first two observing runs of the LIGO-Virgo observatory network, $110$–$3840,mathrmGpc^-3,mathrmyr^-1$, was found to be […]
Kavli Affiliate: Alexander Ji | Summary:The first multimessenger discovery of a binary neutron star (BNS) merger, GW170817, proved that such mergers can source short gamma-ray bursts (SGRBs) and produce r-process elements. The initial merger rate from this single event was found to be broadly consistent with the SGRB rate, the Milky Way (MW) r-process mass, […]
Kavli Affiliate: Luca Grandi | Summary:DarkSide-20k is a WIMP search experiment using liquid argon as a target, designed to perform a background-free search for dark matter with unprecedented sensitivity, and is currently under construction at INFN Laboratori Nazionali del Gran Sasso, Italy. The detector comprises a dual-phase Time Projection Chamber complemented with external veto systems […]
Kavli Affiliate: Luca Grandi | Summary:DarkSide-20k is a WIMP search experiment using liquid argon as a target, designed to perform a background-free search for dark matter with unprecedented sensitivity, and is currently under construction at INFN Laboratori Nazionali del Gran Sasso, Italy. The detector comprises a dual-phase Time Projection Chamber complemented with external veto systems […]
Kavli Affiliate: David W. Miller | Summary:Understanding the origin of flavour hierarchies in the Standard Model remains an open problem, motivating extensions with non-trivial flavour symmetries. We unify deconstructed weak isospin $mathrmSU(2)_mathrmL^3$ into an $mathrmSp(6)_mathrmL$ symmetry at a high scale $v_S$. The three generations of Standard Model (SM) left-handed doublets are unified into a single […]
Kavli Affiliate: David W. Miller | Summary:Understanding the origin of flavour hierarchies in the Standard Model remains an open problem, motivating extensions with non-trivial flavour symmetries. We unify deconstructed weak isospin $mathrmSU(2)_mathrmL^3$ into an $mathrmSp(6)_mathrmL$ symmetry at a high scale $v_S$. The three generations of Standard Model (SM) left-handed doublets are unified into a single […]
Kavli Affiliate: Alexander Ji | Summary:Owing to their proximity to the Milky Way, the Large and Small Magellanic Clouds (L/SMC) uniquely probe the evolution of low-mass galaxies undergoing mutual interactions. In this work, we investigate the connection between the star formation histories (SFHs) of the L/SMC measured from HST imaging in the Scylla survey and […]
Kavli Affiliate: Nickolay Gnedin | Summary:The largest existing simulations of cosmic reionization model radiative transfer with moment methods that require a closure relation. The two most commonly used closure relations are M1 and OTVET; both close the moment hierarchy at the first moment. We explore the properties of a higher, second-order closure. We show that […]