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E-Commerce: Bundesrat will Haftung von Amazon & Co. verschärfen
Online-Handelsplattformen sollen laut den Ländern für nicht rechtskonforme Angebote haften, wenn sie keinen in der EU ansässigen Wirtschaftsakteur nachweisen.

Precision calculation of $N_{\text{eff}}$ with Neutrino Direct Simulation Monte Carlo
Oleksii Ihnatenko, Maksym Ovchynnikov
https://arxiv.org/abs/2508.08379 https://

Precision calculation of $N_{\text{eff}}$ with Neutrino Direct Simulation Monte Carlo
Neutrino Direct Simulation Monte Carlo approach ($ν$DSMC) is a method of solving the neutrino Boltzmann equation in the Early Universe, proposed to study the evolution of neutrinos under various cosmological setups. We formulate a complete $ν$DSMC solver, incorporating the effects of the electron mass, neutrino oscillations, and quantum corrections to the thermodynamics of the electromagnetic plasma. We then apply it for performing precise calculations of neutrino decoupling in the standard c…

Experimental search for neutron-antineutron oscillation with use of ultra-cold neutrons revisited
Tatsushi Shima
https://arxiv.org/abs/2508.07525 https://a…

Experimental search for neutron-antineutron oscillation with use of ultra-cold neutrons revisited
Neutron-antineutron oscillation (nnbar-osc) is a baryon-number-violating process and a sensitive probe for physics beyond the Standard Model. Ultra-cold neutrons (UCNs) are attractive for nnbar-osc searches because of their long storage time, but earlier analyses indicated that phase shifts on wall reflection differ for neutron and antineutron, leading to severe decoherence and loss of sensitivity. Here we revisit this problem by numerically solving the time-dependent Schroedinger equation for …

Challenging a binary neutron star merger interpretation of GW230529
Ivan Markin, Anna Puecher, Mattia Bulla, Tim Dietrich
https://arxiv.org/abs/2508.08750 https://

Challenging a binary neutron star merger interpretation of GW230529
GW230529_181500 represented the first gravitational-wave detection with one of the component objects' mass inferred to lie in the previously hypothesized mass gap between the heaviest neutron stars and the lightest observed black holes. Given the expected maximum mass values for neutron stars, this object was identified as a black hole, and, with the secondary component being a neutron star, the detection was classified as a neutron star-black hole merger. However, due to the low signal-to-nois…

Multi-Energy and Multi-Sample Searches for Neutrinos from GW Events
Aswathi Balagopal V. (for the IceCube Collaboration), Sam Hori (for the IceCube Collaboration), Justin Vandenbroucke (for the IceCube Collaboration)
https://arxiv.org/abs/2508.09034

Multi-Energy and Multi-Sample Searches for Neutrinos from GW Events
The IceCube Neutrino Observatory at the South Pole detects neutrinos of astrophysical origin via their interactions with ice. The main array is optimized for the detection of neutrinos with energies above 1 TeV. A much smaller infill array, known as IceCube DeepCore, extends the sensitivity down to a few GeV. Neutrinos observed in both parts of the detector are used for astrophysical-source searches with multiple messengers. We present two analyses that follow up archival gravitational wave (GW…

Leaker: Besserer Empfang beim iPhone 17 Pro dank Antennenänderung?
Apples neues Kamerasystem erlaubt offenbar mehr Platz für Antennendurchlässe. Das soll die 5G-Signalversorgung optimieren.
https://www.

Impact of improved energy resolution on DUNE sensitivity in presence of a light sterile neutrino
Sabila Parveen, Jogesh Rout, Poonam Mehta
https://arxiv.org/abs/2506.10767

Impact of improved energy resolution on DUNE sensitivity in presence of a light sterile neutrino
The Deep Underground Neutrino Experiment (DUNE) primarily aims to measure the yet unknown parameters of the standard three neutrino framework, i.e., the determination of Dirac CP phase ($δ_{13}$), neutrino mass hierarchy (MH) and octant of $θ_{23}$. In the present work, we consider the standard three neutrino paradigm (referred to as the $(3+0)$ case) and beyond with an additional light sterile neutrino (referred to as the $(3+1)$ case). We consider two configurations : standard energy resolu…

Ultra-high energy event KM3-230213A as a cosmogenic neutrino in light of minimal UHECR flux models
M. Yu. Kuznetsov, N. A. Petrov, Y. S. Savchenko
https://arxiv.org/abs/2509.09590

Ultra-high energy event KM3-230213A as a cosmogenic neutrino in light of minimal UHECR flux models
Recently, the KM3NeT experiment reported the detection of a neutrino with exceptionally high energy E = 220 PeV, whose origin remains unclear. The corresponding value of the neutrino flux is in tension with the results of other high-energy neutrino experiments. In this study, we discuss the possibility that this neutrino is cosmogenic, i. e., produced by ultra-high energy cosmic rays (UHECR) during their propagation through the intergalactic medium. We adopt the UHECR flux models derived by the…

Detecting Sterile Neutrino Dark Matter at MeV Gamma-Ray Observatories
Subaru Fujisawa, Tatsuya Hayashi, Shigeki Matsumoto, Yuki Watanabe
https://arxiv.org/abs/2508.08695 https:/…

Detecting Sterile Neutrino Dark Matter at MeV Gamma-Ray Observatories
We explore the indirect detection of sterile neutrino dark matter within the gauged $U(1)_{B-L}$ extension of the Standard Model, in which three right-handed neutrinos account for neutrino masses, the baryon asymmetry, and dark matter. Focusing on the MeV mass range, we investigate two decay channels: the radiative decay $N \to νγ$, which produces a monochromatic photon, and the three-body decay $N \to e^- e^+ ν$, which leads to a 511 keV photon signal from positronium decay. Taking the upco…

Unraveling the neutron skin thickness through jet charge in deep inelastic scattering
Shan-Liang Zhang, Enke Wang, Xin-Nian Wang, Hongxi Xing
https://arxiv.org/abs/2506.10694

Unraveling the neutron skin thickness through jet charge in deep inelastic scattering
The neutron skin thickness in neutron-rich nuclei has traditionally been measured using elastic fixed target electron-nucleus scattering since the 1970s. In this paper, we propose a novel probe of the neutron skin thickness through deep inelastic scattering in electron-ion collisions, leveraging the intrinsic correlation between final-state jet charge distribution and initial-state partonic distributions in nucleons. Specifically, we demonstrate the sensitivity of jet charge distribution to the…