“Infrared and Collinear Safety” is used as a guiding principle in jet physics to ensure consistent jet definitions that are insensitive to non-perturbative modeling, including in machine-learning applications. However, as demonstrated by the authors, IRC safety does not guarantee small non-perturbative corrections. They develop an Energy Flow Network (EFN) to maximally demonstrate the problem, and then introduce Lipschitz-EFNs to show how it may be mitigated.

This presents a numerical study of black hole thermodynamics in Causal Set theory. The authors introduced a new code that allows the generation of causal sets corresponding to Schwarzschild black holes, and then they tested whether the proposed horizon molecules model is consistent with the continuum Bekenstein-Hawking formula.

To adapt a SU(3) gauge theory on a quantum computer, the authors suggest using an eight level system, or qu8it, in order to match the number of generators. They find that this can speed up simulations by a factor of five.

The authors propose a novel method to probe potential Dark Matter substructures by means of Fast Radio Burst (FRB) observations. They discuss two potential observational scenarios, as well as experimental setups and challenges.

The explosion of core-collapse supernovae leaving neutron star or black hole remnants are difficult to simulate in their full complexity. This paper shows how important features can be captured even in spherical symmetry as long as the effects of aspects of neutrino-driven convection are introduced. Performing simulations for different metallicities, the authors find a surprising bimodal mass distribution for neutron stars and black holes in the low-mass gap.

The authors study stimulated photon-photon collision with a three-laser pulses setup and derive a general analytical formula for the angular distribution and the number of signal photons. This formula should prove to be generally useful for the imminent high-power-laser experiments, given its applicability to a wide parameter space.

A number of astrophysical mechanisms can cause observationally detectable late-time reheating in neutron stars. The paper estimates the sensitivities of the James Webb Space, Extremely Large, and Thirty Meter Telescopes for such observations, also highlighting candidate target systems.

The authors combine new (“multipoint”) methods with established asymptotic and numerical tools to calculate the emission of gravitational radiation from cosmic string loops over the entire celestial sphere from the ultra-low to the ultra-high frequency spectrum. These emissions contribute to the stochastic gravitational wave background and will be detectable by a wide range of instruments, from pulsar timing arrays to space-based gravitational wave detectors. An accurate description of the spectrum will be decisive for its detection.

This future-looking paper proposes an optical telescope array that would employ long-baseline intensity interferometry to image Active Galactic Nuclei (AGN) disks with unprecedented angular resolution. Applications include disk radial profiles of nearby bright AGN, and resolved imaging of Broad Line Regions at cosmological distances, paving the way for using AGN as standard candles to independently measure the Hubble parameter.

The authors study the effect of particle diffusion on the gravitational wave signal from merging neutron stars. As neutron stars merge, the gravitational field from each star induces a tidal perturbation on the other. Particle diffusion will induce dissipation during this process, which both heats up the neutron star and drains energy from the orbit. The authors show that this results in a shift of a few Hertz in the gravitational waveform during the inspiral of a merging neutron star, which is potentially detectable with the next generation of gravitational wave observatories.

The authors compute the ratio of the shear viscosity to the entropy for a SU(2) gauge theory in 2+1 dimensions at nonzero temperature. They do so by using the Kubo formula, evaluating the evolution in real time on small lattices, using both exact diagonalization and quantum computers. The two methods give consistent results, near the holographic bound of 1/4 $\pi$.

A state-of-the-art lattice QCD computation involving hundreds of finite-volume spectra up to 4100 MeV finds only one scalar ${\chi }_{c0}$ and one tensor ${\chi }_{c2}$ charmonium resonances.

The Belle II Collaboration finds the first evidence for the rare decay $B^{+}\to K^{+}\nu \overline{\nu }$. Interestingly, the measured branching fraction is about 2.7 sigma larger than the standard model expectation.

A new measurement of the e+e-→π+π- cross section from the CMD-3 experiment points to a larger hadronic contribution to muon g-2 than previous such measurements, which, if confirmed, would ease the tension between theory and experiment for that magnetic moment.

The CMS collaboration measured cross sections of associated Higgs boson production followed by the Higgs boson’s decay in the bottom-antibottom channel. Combining measurements where the associated vector boson was a $Z$ or a $W$, they find that the measured interaction strength agrees with the standard model prediction to within one sigma within an error of about 20%.

Spacetime wrinkles known as cosmic strings, which might have formed in the early Universe, could be a dominant source of gravitational waves at ultrahigh frequencies, according to new calculations.

The paper successfully models X-ray observational aspects of Quasi-Periodic Eruptions (QPEs) in galactic nuclei as due to collisions between a Tidal Disruption Event (TDE) accretion disk and a stellar mass black hole or main sequence star orbiting around a nuclear supermassive black hole (SMBH). This can have key implications in understanding EMRIs and stellar orbits in the vicinity of SMBHs.

The paper presents the first cosmological constraints from SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS) redshift-space galaxy skew spectra. This work goes beyond two-point statistics, accesses cosmological information down to nonlinear scales, and uses the Simulation-Based Inference of Galaxies (SIMBIG) forward modeling framework to improve constraints for several cosmological parameters up to 38%.

The authors study the effect of annihilating dark matter on massive stars suffering from pair-instability. The annihilation of dark matter inserts energy into the star and the authors show that for sufficient dark matter density, significant changes occur in the masses of the resulting black holes. For dark matter masses greater than 1 GeV, most of the dark matter is in the core which leads to a more violent explosion, resulting in a lighter black hole, while for masses less than .5 GeV, most of the dark matter is in the envelope, supporting the star through energy release, causing a less violent explosion and a more massive black hole.

Modeling of neutrino-nucleus scattering is essential to making sense of neutrino experimental data. In this paper, the MicroBooNE collaboration proposes and measures a set of generalized kinematic imbalance variables that are particularly well-suited for separating out and modeling nuclear effects. The usefulness of these variables is demonstrated by comparing data to event generators.

This paper deals with interacting quantum field theories on a causal set. Free theories on these sets have been copiously discussed but here, the authors develop perturbative expansions, in-in and in-out correlators and make a suggestion on how to define an S-matrix, a daunting task, given the absence of Cauchy surfaces in a causal set.

The authors prove (under some mild assumptions) the conjecture about the rationality of the trace anomaly central charges $a$ and $c$ in $4D$ $N$= 2 superconformal theories. They work on the Higgs branch and use rigorous results from vertex operator algebras in their arguments. This closes some shortcomings of the Coulomb branch arguments and rigorously shows the generality of this intriguing property.

Scattering processes that produce multiple jets in the final states are abundant at the Large Hadron Collider, which makes the computation of the corresponding theoretical high-precision predictions a crucial task to perform. By using different methods, two different collaborations computed the five-parton scattering amplitudes at two-loops in Quantum Chromodynamics (QCD) for any number of colors, that is including all non-planar Feynman diagrams. In DN13078 and DN13084, the authors employed analytic reconstruction methods for amplitude computations, which expose drastically simpler structures in two-loop helicity amplitudes. The authors of the other collaboration in LM18078D used tensor projection in the ’t Hooft-Veltman scheme and found analytic results for the scattering amplitudes expressed in terms of massless pentagon functions.

Scattering processes that produce multiple jets in the final states are abundant at the Large Hadron Collider, which makes the computation of the corresponding theoretical high-precision predictions a crucial task to perform. By using different methods, two different collaborations computed the five-parton scattering amplitudes at two-loops in Quantum Chromodynamics (QCD) for any number of colors, that is including all non-planar Feynman diagrams. In DN13078 and DN13084, the authors employed analytic reconstruction methods for amplitude computations, which expose drastically simpler structures in two-loop helicity amplitudes. The authors of the other collaboration in LM18078D used tensor projection in the ’t Hooft-Veltman scheme and found analytic results for the scattering amplitudes expressed in terms of massless pentagon functions.

Scattering processes that produce multiple jets in the final states are abundant at the Large Hadron Collider, which makes the computation of the corresponding theoretical high-precision predictions a crucial task to perform. By using different methods, two different collaborations computed the five-parton scattering amplitudes at two-loops in Quantum Chromodynamics (QCD) for any number of colors, that is including all non-planar Feynman diagrams. In DN13078 and DN13084, the authors employed analytic reconstruction methods for amplitude computations, which expose drastically simpler structures in two-loop helicity amplitudes. The authors of the other collaboration in LM18078D used tensor projection in the ’t Hooft-Veltman scheme and found analytic results for the scattering amplitudes expressed in terms of massless pentagon functions.