Beyond the Standard Model: A New Precision in Nuclear Beta Decay
![Calculations of [latex]d/A^2c[/latex] from SA-NCSM closely align with predictions for [latex]^{8}\mathrm{Li}[/latex] and [latex]^{8}\mathrm{B}[/latex] beta decay to [latex]^{8}\mathrm{Be}[/latex], exhibiting a correlation with the calculated quadrupole moments [latex]Q(2^{+})[/latex] of the initial nuclei, though uncertainties-derived from both experimental [latex]Q(2^{+})[/latex] values and linear regression-remain a critical component of validating these findings.](https://arxiv.org/html/2602.00341v1/x12.png)
Advancements in first-principles nuclear theory are refining calculations of beta decay, opening new avenues for searching for physics beyond our current understanding of the universe.
Science
Beyond the Signal: Why Interference Matters in New Physics
Accounting for the subtle interplay between new particle signals and known Standard Model processes is critical for accurately interpreting collider data and avoiding false discoveries.
Magnetic Fields as Guiding Currents: A New Route to Quantum Control
Researchers are uncovering how to harness quantum interference in layered materials to manipulate charge flow with magnetic fields and electric currents, potentially leading to new spintronic devices.
Beyond Simplification: Taming Excited States in Hadron Calculations
![The study determines scattering phase shifts utilizing the Lüscher quantization condition-truncated to the SS-wave-for both [latex]I=1[/latex] and [latex]I=0[/latex] channels, with statistical uncertainties indicated by orange bands and gap plus variational bounds at 68% confidence delineated by chevron-bounded blue bands.](https://arxiv.org/html/2601.22273v1/x3.png)
New methods offer a more rigorous way to determine hadron properties in lattice QCD, moving beyond reliance on assumptions about excited-state contributions.
The Unexpected Power of Noise: Stabilizing the Unstable
![The study of a metastable cubic potential-[latex]V(x) = -x^3/3 + m^2x[/latex] with [latex]m=1[/latex]-subject to Cauchy noise reveals a characteristic relationship between mean residence time and noise intensity, exhibiting a maximum indicative of noise-enhanced stability alongside a power-law decay at high noise levels, and further demonstrates a “duck-bill” structure-consistent with boundary-controlled trapping under Lévy flights-across a range of system parameters when normalized against the deterministic transit time.](https://arxiv.org/html/2601.22635v1/x1.png)
A new review reveals how seemingly disruptive noise can surprisingly control and even enhance the stability of metastable states across diverse physical systems.
Beyond Kohn-Sham: A New Path for Simulating Matter Under Pressure
Researchers have developed a novel orbital-free density functional theory method offering a computationally efficient way to model the electronic structure of materials at extreme temperatures and densities.
Hunting Neutrino Shadows: New Limits on Earth’s Hidden Interactions
![The study demonstrates how sensitivities to specific GMP parameters-under the hypothesis of [latex]\varepsilon=1[/latex] and [latex]\varphi\_{12}=\varphi\_{13}=0[/latex]-reveal distinct responses when contrasted with sensitivities derived from a prior three-year DeepCore analysis, highlighting an evolution in system behavior over time.](https://arxiv.org/html/2601.22374v1/x3.png)
A new analysis of nearly a decade of IceCube DeepCore data tightens the constraints on non-standard neutrino interactions within the Earth, shedding light on potential solutions to longstanding discrepancies in neutrino oscillation measurements.
Quantum Security’s Silent Flaws
![Analysis of the [latex]D^{0}\overline{D}^{0}[/latex] and [latex]D_{0}\overline{H}[/latex] correlator matrix, utilizing hexaquark and dibaryon interpolating operators, demonstrates that an unconstrained fit reveals no bound state, whereas a constrained fit-guided by the model in Eq. (74)-identifies the existence of one.](https://arxiv.org/html/2601.22272v1/x73.png)
New research reveals that imperfections in single-photon detectors can create vulnerabilities in quantum key distribution systems, potentially undermining their security.
Quantum Echoes of the Big Bang
![The study demonstrates that diminished scalar amplitude values correlate with reduced Wigner negativity-a reversal of the trend observed in prior analyses-when computations are constrained to the perturbative regime [latex]|\epsilon\_{2}H\chi\_{0}|<1[/latex].](https://arxiv.org/html/2601.22219v1/perturbative.png)
New research suggests quantum effects may have played a larger role in the early universe than previously thought, potentially leaving detectable signatures in the cosmic microwave background.
Entangling Light and Gravity: A New Window into Quantum Spacetime
A new theoretical study explores how classical electromagnetic fields can induce entanglement between photons and gravitons, potentially offering a pathway to observe quantum gravitational effects.