M. Bregant
A5080407019- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Cold Atom Physics and Bose-Einstein Condensates
- Radiation Effects in Electronics
- Advanced Data Storage Technologies
- Statistical Methods and Bayesian Inference
- CCD and CMOS Imaging Sensors
- Superconducting Materials and Applications
- Pulsars and Gravitational Waves Research
- Atomic and Molecular Physics
- advanced mathematical theories
- Scientific Research and Discoveries
- Quantum optics and atomic interactions
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Neutrino Physics Research
Hospital Universitário da Universidade de São Paulo
2016-2025
A. Alikhanyan National Laboratory
2015-2024
University of Bergen
2015-2024
Universidad Nacional Autónoma de México
2010-2024
Universidade de São Paulo
2014-2024
Universidade Cidade de São Paulo
2022-2024
Central China Normal University
2019-2023
China Institute of Atomic Energy
2023
University of Koblenz and Landau
2023
University of Kaiserslautern
2023
ALICE is the heavy-ion experiment at CERN Large Hadron Collider. The continuously took data during first physics campaign of machine from fall 2009 until early 2013, using proton and lead-ion beams. In this paper we describe running environment handling procedures, discuss performance detectors analysis methods for various observables.
We report the experimental observation of a light polarization rotation in vacuum presence transverse magnetic field. Assuming that data distribution is Gaussian, average measured (3.9 +/- 0.5) x 10(-12) rad/pass, at 5 T with 44 000 passes through 1 m long magnet, lambda = 1064 nm. The relevance this result terms existence light, neutral, spin-zero particle discussed.
In 2006 the PVLAS collaboration reported observation of an optical rotation generated in vacuum by a magnetic field. To further check against possible instrumental artifacts, several upgrades to apparatus have been made during past year. Two data taking runs, at wavelength 1064 nm, performed new configuration with field strengths 2.3 and 5 T. The T value was chosen order avoid stray fields. observations do not show presence signal down levels...
Evidence for the neutron-rich hypernucleus $_{\ensuremath{\Lambda}}^{6}\mathrm{H}$ is presented from FINUDA experiment at $\mathrm{DA}\ensuremath{\Phi}\mathrm{NE}$, Frascati, studying $({\ensuremath{\pi}}^{+},{\ensuremath{\pi}}^{\ensuremath{-}})$ pairs in coincidence ${K}_{\mathrm{stop}}^{\ensuremath{-}}+^{6}\mathrm{Li}\ensuremath{\rightarrow}_{\ensuremath{\Lambda}}^{6}\mathrm{H}+{\ensuremath{\pi}}^{+}$ production reaction followed by...
Experimental bounds on induced vacuum magnetic birefringence can be used to improve present photon-photon scattering limits in the electronvolt energy range. Measurements with Polarizzazione del Vuoto con Laser apparatus [E. Zavattini et al., Phys. Rev. D 77, 032006 (2008)] at both $\ensuremath{\lambda}=1064$ and 532 nm lead parameter ${A}_{e}$, describing nonlinear effects QED, of ${A}_{e}^{(1064)}<6.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}21}\text{ }\text{...
This paper presents the test results of second prototype SAMPA, ASIC designed for upgrade read-out front end electronics ALICE Time Projection Chamber (TPC) and Muon (MCH). SAMPA is made in a 130 nm CMOS technology with 1.25 V nominal voltage supply provides 32 channels, selectable input polarity, three possible combinations shaping time sensitivity. Each channel consists Charge Sensitive Amplifier, semi-Gaussian shaper 10-bit ADC; Digital Signal Processor digital filtering compression...
The FINUDA experiment performed a systematic study of the charged mesonic weak decay channel $p$-shell $Λ$-hypernuclei. Negatively pion spectra from were measured with magnetic analysis for first time ${^{7}_ΛLi}$, ${^{9}_ΛBe}$, ${^{11}_ΛB}$ and ${^{15}_ΛN}$. shape $π^{-}$ was interpreted through comparison distorted wave calculations that take into account structure both hypernucleus daughter nucleus. Branching ratios $Γ_{π^{-}}/Γ_{tot}$ derived converted to rates $Γ_{π^{-}}$ by means known...
This paper presents the SAMPA, an ASIC designed for upgrade of read-out front end electronics ALICE Time Projection Chamber (TPC) and Muon Chambers (MCH). SAMPA is made in a 130 nm CMOS technology with 1.25 V nominal voltage supply includes 32 channels, selectable input polarity, five possible combinations shaping time sensitivity. Each channel comprises Charge Sensitive Amplifier, semi-Gaussian shaper 10-bit ADC, followed by Digital Signal Processor. A prototype multi project run was...
Abstract In this paper we report on a set of characterisations carried out the first monolithic LGAD prototype integrated in customised 110 nm CMOS process having depleted active volume thickness 48 μm. This is formed by pixel array where each has total size 100 μm× 250 μm and includes high-speed front-end amplifier. After describing sensor electronics architecture, both laboratory in-beam measurements are reported described. Optical performed with an IR pulsed laser setup have shown...
The decay of Λ-hypernuclei without π emission, known as Non-Mesonic Weak Decay (NMWD), gives an effective tool to investigate ΔS=1 four-baryon interactions. It was theoretically suggested that the two-nucleon induced mechanism could play a substantial role in reproducing observed NMWD rates and nucleon spectra, but at present no direct evidence such has been obtained. FINUDA experiment, exploiting possibility detect both charged neutral particles coming from hypernucleus decay, allowed us...
Conseil Européen pour la Recherche Nucléaire is currently undergoing a major upgrade within the A Large Ion Collider Experiment (ALICE) detectors, one of four main experiments at Hadron (LHC) accelerator. The LHC luminosity will increase making heavy ions collision rate rise from 500 Hz to 50 kHz. Both time projection chamber (TPC) and muon (MCH) detectors demand new faster readout electronics, which support continuous cope with this higher rate. This paper presents serialized analog-digital...