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Nuclear Theory·nucl-th

Thursday·April 30, 2026

12 papers—5 primary·7 cross-listed

All12Primary5Cross-lists7
  1. 06

    Resonance Statistics -Informed Fitting Applied to Automated Cross Section Evaluation

    William Fritsch · Noah Walton · Justin Loring · Jacob Forbes · Oleksii Zivenko · Aaron Clark · Elan Park-Bernstein · Vladimir Sobes

    This work investigates the use of resonance statistics for resonance evaluation to inform spin group assignment and an alternative fitting objective function beyond the commonly used chi-squared statistic. Resonance statistics -informed methods are applied to the automated resonance fitting framework, developed by N. Walton et al. In this automated framework, the utility of resonance statistics is largely unexplored. The new resonance statistics -informed spin group shuffling algorithm reduces spin group frequency bias seen in the base fitting algorithm. Although resonance statistics -informed optimization produces negligible changes in pointwise cross section agreement, it significantly improves consistency with Wigner level-spacing statistics and stabilizes the fitted resonance density in the presence of model imperfections.

    ↳ physics.comp-phcond-mat.mtrl-scinucl-th0 citations
  2. 07

    Revisiting Turner Window Axions: The Untapped Potential of NaI Dark Matter Detectors

    W. C. Haxton🇺🇸 · Xing Liu🇺🇸 · Anupam Ray🇨🇦 · Evan Rule🇺🇸

    The "Turner window" corresponds to axions with masses 1 eV that have sufficiently strong couplings to matter to evade limits from the cooling of SN1987A. This window, through which the trajectories for the KSVZ and DFSZ QCD axions run, has been thought to be largely closed because of (1) the floor established by SN1987A cooling, (2) the absence of SN1987A-associated photons in the Kamioka II detector, and (3) the limit on neutrons produced by solar axions in the Sudbury Neutrino Observatory. We show that a more complete treatment of the axion opacity in SN1987A, significantly weakens (2). Consequently, for axion or axion-like particles with hadronic couplings, and , significant regions within the Turner window now become viable. We describe a new opportunity to constrain such hadronically coupled axions via their resonant absorption in NaI detectors. The source is the Milky Way's carbon-burning stars -- the progenitors of ONeMg white dwarfs as well as electron-capture and core-collapse supernovae -- which synthesize significant quantities of Na, keeping it at temperatures K for periods up to tens of thousands of years. Na acts as a thermal pump to convert stellar energy into axions, which arrive at the Earth as a thermally broadened line at 440 keV. These axions can be detected via resonant absorption in NaI, with the needed detector arrays already in place, developed by DAMA/LIBRA and other collaborations to search for the elastic scattering of light WIMPs. In axion detection, NaI serves as both the target, producing 's following resonant absorption, and the detector for those 's. With current array masses and backgrounds, we find that the coupling range -- can be covered after two years of data, including QCD axions with eV.

    ↳ hep-phastro-ph.HEhep-exnucl-ex+11 citation
  3. 08

    Formation of gaseous, doubly charged cerium monofluoride CeF and its sensitivity to new physics

    R. Simpson🇨🇦 · C. Zülch🇩🇪 · K. B. Ng🇨🇦 · I. Belosevic🇨🇦 · C. Charles🇨🇦 · P. Justus🇩🇪 · R. Berger🇩🇪 · S. Malbrunot-Ettenauer🇨🇦 · A. A. Kwiatkowski🇨🇦 · M. P. Reiter🇬🇧 · J. Ash🇨🇦 · C. Babcock🇨🇦 and 16 other authors

    Tricationic protactinium monofluoride (PaF) has been proposed as a candidate for probing physics beyond the Standard Model of particle physics. Since studies with PaF require significant experimental advances, we exploit the stable, valence-isoelectronic dicationic cerium monofluoride (CeF) as a surrogate. Gas-phase fluorinated-cerium molecular ions are formed and identified using the Off-Line Ion Source and TITAN mass measurement facilities at TRIUMF. Quantum chemical calculations are performed on the electronic structure of CeF, revealing a parallel to that of PaF. Moreover, these calculations provide estimates on the sensitivity of CeF itself to various -odd properties. A brief discourse on the specifics of the quantum control of CeF is presented which anticipates future searches for symmetry violations.

    ↳ physics.atom-phnucl-exnucl-thquant-ph1 citation
  4. 09

    Quantum Complexity and New Directions in Nuclear Physics and High-Energy Physics Phenomenology

    Caroline E. P. Robin🇩🇪 · Martin J. Savage🇺🇸

    Advances in quantum information science (QIS) are providing transformative insights into the complexity of quantum many-body systems, potentially defining new frontiers in nuclear and high-energy physics. This review explores how QIS-derived techniques are fostering new analytic frameworks and algorithms - both classical and quantum - to tackle (some of the) present barriers to discovery in fundamental physics, with applicability to other science domains. We highlight how these techniques are shedding new light on the structure and dynamics of hadrons, nuclei, matter in extreme conditions, and beyond. Importantly, they are expected to play an essential role in the development of large-scale quantum simulations of such systems, particularly in setting the balance among quantum and classical computational resources.

    ↳ quant-phhep-lathep-phnucl-th15 citations
  5. 10

    Particle seismology: mechanical and gravitational properties from parton-hadron duality

    Enrique Ruiz Arriola🇪🇸 · Wojciech Broniowski🇵🇱

    The internal structure of hadrons is characterized by form factors which correspond to matrix elements of currents. Among those, the stress-energy-momentum tensor is a universally conserved quantity providing the gravitational form factors, from which mechanical properties may be derived via the response to the space-time fluctuations. They have received much attention because of their role as moments of the Generalized Parton Distributions, where the stress-energy-momentum tensor couples to two photons, and more recently, due to the explicit lattice QCD determination for the pion and nucleon. In these lectures we attempt a pedagogical review of the topic from a purely hadronic point of view, based on the notion of dispersion relations, meson dominance, and parton-hadron duality. We show that despite the overwhelming simplicity of the approach, a rather successful description of the lattice QCD data is achieved.

    ↳ hep-phhep-latnucl-th1 citation
  6. 11

    Thermodynamics of magnetized matter in hot and dense QCD

    Bastian B. Brandt🇩🇪 · Gergely Endrodi🇭🇺

    This chapter, to appear in the section on QCD under extreme conditions within the Encyclopedia of Nuclear Physics, aims to provide a pedagogical introduction to the physics of quarks and gluons in the presence of high temperature, nonzero (isospin) density and strong background electromagnetic fields. Extreme conditions of these types are relevant for the description of high-energy heavy-ion collisions, neutron stars and their mergers, as well as the evolution of the early Universe in its first microsecond. Most of the existing results on this topic have been obtained by means of first-principles simulations of the discretized theory of the strong interactions, lattice Quantum Chromodynamics (QCD). This lays the focus of this review chapter, although various calculations within effective theories of QCD -- most notably chiral perturbation theory -- are also discussed. Furthermore, we provide an outlook concerning open questions and yet uncharted parameter regions within this fascinating system.

    ↳ hep-lathep-phnucl-th2 citations
  7. 12

    Continuum contribution to charged-current absorption of low-energy on Ar

    Steven Gardiner🇺🇸 · Pablo Barham Alzás🇨🇭 · Alexis Nikolakopoulos🇺🇸 · Luca H. Abu El-Haj🇺🇸 · Natalie Jachowicz🇧🇪 · Vishvas Pandey🇺🇸

    Accurate modeling of the absorption of tens-of-MeV on Ar is needed to enable measurements of astrophysical neutrinos using large liquid argon time projection chamber (LArTPC) detectors, such as those planned for the Deep Underground Neutrino Experiment (DUNE). We revisit the MARLEY neutrino interaction model used in present estimates of DUNE sensitivity to supernova and solar neutrino signals. Multiple theoretical refinements are pursued, especially in the unbound continuum region of nuclear excitation energy. Inclusive charged-current neutrino-argon cross sections are calculated using a hybrid strategy. Nuclear transitions to unbound states are treated using a Hartree-Fock Continuum Random Phase Approximation (HF-CRPA) model, including forbidden contributions. Allowed transitions to low-lying discrete levels are also included using indirect measurements and approximate corrections for the momentum transfer dependence. Exclusive predictions are obtained by coupling these calculations with a statistical nuclear de-excitation model. The impact on observables of interest for DUNE and similar experiments is examined in terms of both total and differential cross sections. Our refined calculations predict a lower allowed portion of the cross section relative to the prior MARLEY model. At neutrino energies appreciably below 100 MeV, the inclusion of forbidden transitions does not fully compensate for the loss of allowed strength. For a representative neutrino burst from a galactic core-collapse supernova, our results suggest that MARLEY 1.2.0 overestimates the event yield in a DUNE-like detector by approximately 20%. However, because this overestimation is more severe at backwards angles, use of the charged-current -Ar reaction for supernova pointing may be more feasible than previously expected.

    ↳ hep-phnucl-th3 citations

Affiliations

first authorsco-authorsvia INSPIRE