A. Martini
A5049041483- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Scientific Research and Discoveries
- Scientific Computing and Data Management
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- International Science and Diplomacy
- Magnetic confinement fusion research
- Big Data Technologies and Applications
Deutsches Elektronen-Synchrotron DESY
2021-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
1989-2024
Korea Institute of Science & Technology Information
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2017-2022
Campbell Collaboration
2022
University of Bonn
2022
University of the Basque Country
2022
Chonnam National University
2022
University of Padua
2022
University of Houston
2021
Abstract The Silicon Vertex Detector of Belle II is a state-of-the-art tracking and vertexing system based on double-sided silicon strip sensors, designed fabricated by large international collaboration in the period 2012–2018. Since 2019 it has been operation providing high quality data with small number defective channels (<1%), hit-finding efficiency (>99%), good signal-to-noise ratio (well excess 10 for all sensor configurations tracks). Together control over alignment, these are...
Abstract We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ( "Image missing"<!-- image only, no MathML or LaTex -->) mesons at Belle II. The provide essential inputs for measurements mixing and charge-parity violation. validate evaluate performance using hadronic --> decays with flavor-specific final states reconstructed in a data set corresponding an integrated luminosity 62.8 fb $$^{-1}$$ <mml:math...
Belle II is an experiment operating at the intensity frontier. Over next decades, it will record decay of billions bottom mesons, charm hadrons, and tau leptons produced in 10 GeV electron-positron collisions SuperKEKB high-luminosity collider KEK. These data, collected low-background kinematically known conditions, allow us to measure hundreds parameters that test standard model (SM) probe for existence new particles, mass scales orders magnitudes higher than those studied energy We project...
We report the first result from a dark photon matter search in mass range 78.62 to 83.95 μeV/c^{2} with dielectric haloscope prototype for madmax (Magnetized Disc and Mirror Axion eXperiment). Putative photons would convert detectable within stack consisting of three sapphire disks mirror. The emitted power this system is received by an antenna successively digitized using low-noise receiver. No significant signal attributable has been observed above expected background. Assuming unpolarized...
Abstract JUNO is a huge neutrino detector that will use 20 kton of organic liquid scintillator as its detection medium. The mixture linear alkyl benzene (LAB), 2.5 g/L 2,5-diphenyloxazole (PPO) and 3 mg/L 1,4-Bis(2-methylstyryl)benzene (Bis-MSB). main goal to determine the Neutrino Mass Ordering [1,2,3]. In order achieve this purpose, good energy position reconstruction required, hence complete understanding optical characteristics mandatory. paper we present first measurements on emission...
Abstract We present the novel implementation of a non-differentiable metric approximation and corresponding loss-scheduling aimed at search for new particles unknown mass in high energy physics experiments. call loss-scheduling, based on minimisation figure-of-merit related function typical particle physics, Punzi-loss function, neural network that utilises this loss Punzi-net. show Punzi-net outperforms standard multivariate analysis techniques generalises well to hypotheses which it was...
Abstract MADMAX, a future experiment to search for axion dark matter, is based on novel detection concept called the dielectric haloscope. It consists of booster composed several disks positioned with μm precision. A prototype one movable disk was built demonstrate mechanical feasibility such in challenging environment experiment: high magnetic field convert axions into photons and cryogenic temperature reduce thermal noise. tested both inside strong up 1.6 T at temperatures down 35 K. The...
We report the first evidence for h_{b}(2P)→ϒ(1S)η transition with a significance of 3.5 standard deviations. The decay branching fraction is measured to be B[h_{b}(2P)→ϒ(1S)η]=(7.1_{-3.2}^{+3.7}±0.8)×10^{-3}, which noticeably smaller than expected. also set upper limits on π^{0} transitions B[h_{b}(2P)→ϒ(1S)π^{0}]<1.8×10^{-3}, and B[h_{b}(1P)→ϒ(1S)π^{0}]<1.8×10^{-3}, at 90% confidence level. These results are obtained 131.4 fb^{-1} data sample collected near ϒ(5S) resonance Belle detector...
The measurement of two-particle angular correlation functions in high-multiplicity e^{+}e^{-} collisions at sqrt[s]=10.52 GeV is reported. In this study, the 89.5 fb^{-1} hadronic annihilation data collected by Belle detector KEKB are used. Two-particle measured full relative azimuthal angle (Δϕ) and three units pseudorapidity (Δη), defined either electron beam axis or event-shape thrust axis, studied as a function charged-particle multiplicity. analysis, with mostly outgoing quark pairs...
MADMAX, a future experiment to search for axion dark matter, is based on novel detection concept called the dielectric haloscope. It consists of booster composed several disks positioned with $\mu$m precision. A prototype one movable disk was built demonstrate mechanical feasibility such in challenging environment experiment: high magnetic field convert axions into photons and cryogenic temperature reduce thermal noise. tested both inside strong up 1.6 T at temperatures down 35K. The...
The Silicon Vertex Detector of the Belle II Experiment at KEK in Tsukuba, Japan, consists 172 double-sided strip sensors. They are read out by 1748 APV25 chips, and analog data sent radiation zone to 48 modules which convert them digital. FPGAs then compensate line signal distortions using digital finite impulse response filters detect frames from incoming stream. Then they perform pedestal subtraction, common mode correction zero suppression, as well calculate peak timing amplitude each...
Ansaldo Componenti, under a contract with ENEA, has developed the interlayer electrical points and coil terminations for 12-T solenoid, 0.6-m bore, Nb/sub 3/Sn, wound wind react technique cable-in-conduit (CIC) conductor. Both joints coil's operating conditions, will be subjected to magnetic field of about 8-10 T 6-kA current. Tests on shorter length terminations, at different fields currents, were carried out. The resistance 140-mm-long joint B=8 I=6 kA was 2.4*10-9 Omega . measured between...
The large amount of data produced by the ATLAS experiment needs new computing paradigms for processing and analysis, which involve many centres spread around world. workload is managed regional federations, called "clouds". Italian cloud consists a main (Tier-1) center, located in Bologna, four secondary (Tier-2) centers, few smaller (Tier-3) sites. In this contribution we describe facilities activities processing, simulation software development performed within cloud, discuss tests...
ATLAS data are distributed centrally to Tier-1 and Tier-2 sites. The first stages of selection analysis take place mainly at centres, with the final, iterative interactive, taking mostly Tier-3 clusters. Italian cloud consists a Tier-1, four Tier-2s, sites each institute. Tier-3s that grid-enabled used test code will then be run on larger scale Tier-2s. All offer interactive access their users possibility PROOF. This paper describes hardware software infrastructure choices taken, operational...
Despite the great progress which is being continuously made towards direct photoelectric recording, it almost certain that for many years to come photographic plates will remain most common means detecting images of stars and stellar spectra, whether directly or through intermediary an image intensifier. The spectrum a star contains enormous wealth information whose utilization one important tasks observational astrophysics. To achieve this task difficult problems must be solved, first...