Preprints

An algorithm for calculating the radiation field of a charged point particle performing a helical motion in an infinite cylindrical waveguide with a multilayer side wall is found. The number of layers and their filling is arbitrary. [...]

During its first phase, from 2004 up to the end of 2012, the H.E.S.S. (High Energy StereoscopicSystem) experiment observed the extragalactic skies for more than 2700 hours. [...]

The equivalence principle and the inverse-square law of gravity could be violated at short distances (10$^{-6}$–10$^{-12}$ m) by scalars sporting a coupling gN to nucleons and mass eV ≲ m$_ϕ$ ≲ MeV. We show for the first time that stringent bounds on the existence of these scalars can be derived from the observed cooling of nearby isolated neutron stars (NSs). [...]

We present a search for an invisible hidden-sector particle $ X_{\rm{inv}}$, produced in $B^0 \to \bar{D}^0 X_{\rm{inv}}$ and $B^\pm\to h X_{\rm{inv}}$ decays, where $h = π^\pm$, $K^\pm$, $D_{s}^\pm$, $p^\pm$. The search is performed using $e^+ e^-$ collision data recorded with the Belle detector, corresponding to 711~fb$^{-1}$. [...]

MALTA2 is a depleted monolithic active pixel sensor (DMAPS) designed for tracking at high rates and typically low detection threshold of 200e−. Threshold calibration is crucial to understanding the charge collection in the pixel. [...]

A $γγ$ collider, either in conjunction with an $e^+e^-$ linear collider or as a stand-alone facility, offers a very attractive Higgs physics programme at relatively low centre-of-mass (c.m.) energies. While the Higgs boson that has been discovered at the LHC can be studied in detail in resonant production at 125~GeV, a c.m. [...]

The paper evaluates the thermal regime of a cryogenically cooled copper photocathode integrated into a continuous-wave superconducting radio-frequency injector cavity with direct thermal contact. Such a photoinjector layout is being developed at DESY and has recently demonstrated a record-high 50 MV/m axial electric field in radio-frequency tests, marking an important milestone. [...]

The Single-Mirror Small-Size Telescope (SST-1M) stereoscopic system is composed of two Imaging Atmospheric Cherenkov Telescopes (IACTs) designed to deliver optimal performance for gamma-ray astronomy in the multi-TeV energy range. It features a 4-m diameter tessellated mirror dish and an innovative SiPM-based camera [...]

We present two recent measurements of semileptonic B decays at Belle, offering valuable insights into the determination of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element $|V_{ub}|$. These analyses use the full Belle dataset, comprising $772 \times 10^6$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance. [...]

Context. The origin of the astrophysical neutrino flux discovered by IceCube remains largely unknown [...]