W. C. Haxton
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View article: A Continuous Galactic Line Source of Axions: The Remarkable Case of 23Na
A Continuous Galactic Line Source of Axions: The Remarkable Case of 23Na Open
We argue that $^{23}$Na is a potentially significant source of galactic axions. For temperatures $\gtrsim 7 \times 10^8$K -- characteristic of carbon burning in the massive progenitors of supernovae and ONeMg white dwarfs -- the 440 keV fi…
View article: Nuclear-level effective theory of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>μ</mml:mi><mml:mo>→</mml:mo><mml:mi>e</mml:mi></mml:mrow></mml:math> conversion: Inelastic process
Nuclear-level effective theory of conversion: Inelastic process Open
Mu2e and COMET will search for electrons produced via the neutrinoless conversion of stopped muons bound in 1s atomic orbits of Al27, improving existing limits on charged lepton flavor violation (CLFV) by roughly four orders of magnitude. …
View article: Distinguishing Charged Lepton Flavor Violation Scenarios with Inelastic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>μ</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>e</mml:mi></mml:math> Conversion
Distinguishing Charged Lepton Flavor Violation Scenarios with Inelastic Conversion Open
The Mu2e and COMET experiments are expected to improve existing limits on charged lepton flavor violation (CLFV) by roughly 4 orders of magnitude. μ→e conversion experiments are typically optimized for electrons produced without nuclear ex…
View article: Effective theory tower for μ → e conversion
Effective theory tower for μ → e conversion Open
We present theoretical predictions for µ → e conversion rates using a tower of efective feld theories connecting the UV to nuclear physics scales. The interactions in nuclei are described using a recently developed nonrelativistic effectiv…
View article: Effective theory tower for μ → e conversion
Effective theory tower for μ → e conversion Open
A bstract We present theoretical predictions for μ → e conversion rates using a tower of effective field theories connecting the UV to nuclear physics scales. The interactions in nuclei are described using a recently developed nonrelativis…
View article: Distinguishing charged lepton flavor violation scenarios with inelastic $μ\rightarrow e$ conversion
Distinguishing charged lepton flavor violation scenarios with inelastic $μ\rightarrow e$ conversion Open
The Mu2e and COMET experiments are expected to improve existing limits on charged lepton flavor violation (CLFV) by roughly four orders of magnitude. $μ\rightarrow e$ conversion experiments are typically optimized for electrons produced wi…
View article: Gallium neutrino absorption cross section and its uncertainty
Gallium neutrino absorption cross section and its uncertainty Open
In the recent Baksan Experiment on Sterile Transitions (BEST), a suppressed rate of neutrino absorption on a gallium target was observed, consistent with earlier results from neutrino source calibrations of the SAGE and GALLEX/GNO solar ne…
View article: The Gallium Anomaly
The Gallium Anomaly Open
In order to test the end-to-end operations of gallium solar neutrino experiments, intense electron-capture sources were fabricated to measure the responses of the radiochemical SAGE and GALLEX/GNO detectors to known fluxes of low-energy ne…
View article: Fundamental Symmetries, Neutrons, and Neutrinos (FSNN): Whitepaper for the 2023 NSAC Long Range Plan
Fundamental Symmetries, Neutrons, and Neutrinos (FSNN): Whitepaper for the 2023 NSAC Long Range Plan Open
Through the exploration of fundamental symmetries, and by using nuclei, neutrons, and neutrinos, nuclear physics addresses some of the most profound questions in science. Why does the universe contain so much more matter than antimatter? A…
View article: Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
Dense Nuclear Matter Equation of State from Heavy-Ion Collisions Open
The nuclear equation of state (EOS) is at the center of numerous theoretical and experimental efforts in nuclear physics. With advances in microscopic theories for nuclear interactions, the availability of experiments probing nuclear matte…
View article: Horizons: nuclear astrophysics in the 2020s and beyond
Horizons: nuclear astrophysics in the 2020s and beyond Open
Nuclear astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress an…
View article: Search for electron-neutrino transitions to sterile states in the BEST experiment
Search for electron-neutrino transitions to sterile states in the BEST experiment Open
The Baksan Experiment on Sterile Transitions (BEST) probes the gallium\nanomaly and its possible connections to oscillations between active and sterile\nneutrinos. Based on the Gallium-Germanium Neutrino Telescope (GGNT) technology\nof the…
View article: Results from the Baksan Experiment on Sterile Transitions (BEST)
Results from the Baksan Experiment on Sterile Transitions (BEST) Open
The Baksan Experiment on Sterile Transitions (BEST) was designed to investigate the deficit of electron neutrinos ν_{e} observed in previous gallium-based radiochemical measurements with high-intensity neutrino sources, commonly referred t…
View article: Solar neutrinos and the primordial Sun
Solar neutrinos and the primordial Sun Open
I discuss the possibility that the large-scale segregation of metals that accompanied planet formation might have left an imprint on the composition of the primordial Sun. Motivated in part by recent Borexino measurements of CN solar neutr…
View article: Nucleon-level Effective Theory of $\mu\rightarrow e$ Conversion
Nucleon-level Effective Theory of $\mu\rightarrow e$ Conversion Open
The Mu2E and COMET $\mu \rightarrow e$ collaborations plan to advance branching ratio sensitivities by four orders of magnitude, further constraining new sources of charged lepton flavor violation (CLFV). Here we formulate a non-relativist…
View article: A MultiScale Approach to Nuclear Structure and Reactions: Applications to Fundamental Symmetries. Final Report
A MultiScale Approach to Nuclear Structure and Reactions: Applications to Fundamental Symmetries. Final Report Open
This report is on the CalLat work done by UC Berkeley postdoctoral Fellow Ken McElvain, who was support 50% time under this contract, from July 1, 2020, through June 30, 2021.
View article: Solar fusion cross sections
Solar fusion cross sections Open
We review and analyze the available information on the nuclear-fusion cross sections that are most important for solar energy generation and solar neutrino production. We provide best values for the low-energy cross-section factors and, wh…
View article: Nuclear physics without high-momentum potentials: Constructing the nuclear effective interaction directly from scattering observables
Nuclear physics without high-momentum potentials: Constructing the nuclear effective interaction directly from scattering observables Open
The traditional approach to nuclear physics encodes phase shift information\nin a nucleon-nucleon (NN) potential, producing a nucleon-level interaction that\ncaptures the sub-GeV consequences of QCD. A further reduction to the nuclear\nsca…
View article: Particle-hole mirror symmetries around the half-filled shell: Quantum numbers and algebraic structure of composite fermions
Particle-hole mirror symmetries around the half-filled shell: Quantum numbers and algebraic structure of composite fermions Open
Composite fermions (CFs) of the fractional quantum Hall effect are described as spherical products of electron and vortex spinors, built from underlying L=1/2 ladder operators aligned so that the spinor angular momenta Le and Lv are maxima…
View article: Constraining WIMP-Nucleon Effective Interactions from PandaX-II Experiment
Constraining WIMP-Nucleon Effective Interactions from PandaX-II Experiment Open
We present constraints on the WIMP-nucleon effective interaction from the PandaX-II experiment. We consider well-motivated dimensional-four interactions consisting of couplings among vector and axial vector currents, as well as several typ…
View article: A New Paradigm for Hadronic Parity Nonconservation and Its Experimental Implications
A New Paradigm for Hadronic Parity Nonconservation and Its Experimental Implications Open
The primary experimental goal of studies of hadronic parity nonconservation (PNC) has long been the isolation of the isovector weak nucleon–nucleon interaction, expected to be dominated by long-range pion exchange and enhanced by the neutr…
View article: Deep Underground Science and Engineering Laboratory - Preliminary Design Report
Deep Underground Science and Engineering Laboratory - Preliminary Design Report Open
The DUSEL Project has produced the Preliminary Design of the Deep Underground Science and Engineering Laboratory (DUSEL) at the rehabilitated former Homestake mine in South Dakota. The Facility design calls for, on the surface, two new bui…
View article: Nuclear Physics without High-Momentum Potentials: Direct Construction of the Effective Interaction from Scattering Observables
Nuclear Physics without High-Momentum Potentials: Direct Construction of the Effective Interaction from Scattering Observables Open
The standard approach to nuclear physics encodes phase shift information in an NN potential, then decodes that information in forming an effective interaction, appropriate to a low-momentum Hilbert space. Here we show that it is instead po…