A5026875211- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Nuclear physics research studies
- Quantum, superfluid, helium dynamics
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Quantum and Classical Electrodynamics
- Cosmology and Gravitation Theories
- Advanced Chemical Physics Studies
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Quantum Mechanics and Applications
- Relativity and Gravitational Theory
University of Brescia
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2016-2025
A. Alikhanyan National Laboratory
2017-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2022-2024
Brescia University
2017-2024
Warsaw University of Technology
2022
University of Latvia
2022
Czech Technical University in Prague
2022
Austrian Academy of Sciences
2022
Stefan Meyer Institute for Subatomic Physics
2022
Einstein's general theory of relativity from 19151 remains the most successful description gravitation. From 1919 solar eclipse2 to observation gravitational waves3, has passed many crucial experimental tests. However, evolving concepts dark matter and energy illustrate that there is much be learned about gravitating content universe. Singularities in lack a quantum gravity suggest our picture incomplete. It thus prudent explore exotic physical systems. Antimatter was unknown Einstein 1915....
Abstract Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and design highly sensitive experiments needs antihydrogen controllable well defined conditions. We present here experimental results on production in pulsed mode which time when 90% produced is known an uncertainty ~250 ns. The source generated by charge-exchange reaction between Rydberg positronium atoms—produced via injection positron beam into...
The AEGIS experiment, currently being set up at the Antiproton Decelerator CERN, has objective of studying free fall antimatter in Earth's gravitational field by means a pulsed cold atomic beam antihydrogen atoms. Both duration and vertical displacement horizontally emitted atoms will be measured, allowing first test WEP with antimatter.
Abstract The precise measurement of forces is one way to obtain deep insight into the fundamental interactions present in nature. In context neutral antimatter, gravitational interaction high interest, potentially revealing new that violate weak equivalence principle. Here we report on a successful extension tool from atom optics—the moiré deflectometer—for acceleration slow antiprotons. setup consists two identical transmission gratings and spatially resolving emulsion detector for...
We demonstrate the laser excitation of $n=3$ state positronium (Ps) in vacuum. A combination a specially designed pulsed slow positron beam and high-efficiency converter target was used to produce Ps. Its annihilation recorded by single-shot lifetime spectroscopy. Pulsed level at wavelength $\ensuremath{\lambda}\ensuremath{\approx}205$ nm monitored via Ps photoionization induced second intense pulse $\ensuremath{\lambda}=1064$ nm. About 15% overall emitted into vacuum excited photoionized....
We have performed a search for CPT violation in neutral charm meson oscillations. While flavor mixing the sector is predicted to be small by Standard Model, it still possible investigate through study of proper time dependence asymmetry right-sign decay rates $D^0\to K^-π^+$ and $\d0b\to K^+π^-$. This related violating complex parameter $ξ$ parameters $x$ $y$: $A_{CPT}\propto{\rm Re} ξy-{\rm Im} ξx$ . Our 95% confidence level limit $-0.0068
We have developed a new method, based on the ballistic transfer of preaccumulated plasmas, to obtain large and dense positron plasmas in cryogenic environment. The method involves transferring emanating from region with low magnetic field (0.14 T) relatively high pressure (10(-9) mbar) into 15 K Penning-Malmberg trap immersed 3 T base better than 10(-13) mbar. achieved accumulation rate is more one half orders magnitude higher previous most efficient UHV compatible scheme. Subsequent...
Production of antihydrogen atoms by mixing antiprotons with a cold, confined, positron plasma depends critically on parameters such as the density and temperature. We discuss nondestructive measurements, based novel, real-time analysis excited, low-order modes, that provide comprehensive characterization in ATHENA apparatus. The length, radius, density, total particle number are obtained. Measurement control temperature variations, application to production experiments discussed.
Antihydrogen is formed when antiprotons are mixed with cold positrons in a nested Penning trap. We present experimental evidence, obtained using our antihydrogen annihilation detector, that the spatial distribution of emerging atoms independent positron temperature and axially enhanced. This indicates before thermal equilibrium plasma. result has important implications for trapping spectroscopy antihydrogen.
We describe a system designed to re-bunch positron pulses delivered by an accumulator supplied source and Surko-trap. Positron from the are magnetically guided in 0.085 T field injected into region free of magnetic fields through μ-metal terminator. Here positrons temporally compressed, electrostatically accelerated towards porous silicon target for production emission positronium vacuum. Positrons focused spot less than 4 mm FWTM bunches ∼8 ns FWHM. Emission vacuum is shown single shot...
In recent decades, muon imaging has found a plethora of applications in many fields. This technique succeeds to infer the density distribution big inaccessible structures where conventional techniques cannot be used. The requirements different demand specific implementations image reconstruction algorithms for either multiple scattering or absorption-transmission data analysis, as well noise-suppression filters and momentum estimators. paper presents successful results applied simulated some...
Although the gravitational interaction between matter and antimatter has been subject of theoretical speculation since discovery latter in 1928, only recently was ALPHA experiment at CERN able to observe, for first time, effects gravity on atoms, namely antihydrogen. After an introduction concept antimatter, along with its still-unresolved mysteries, details about how antihydrogen is produced Antimatter Factory will be given. Finally, measurement acceleration atoms falling Earth’s field described.
We show that antihydrogen production is the dominant process when mixing antiprotons and positrons in ATHENA apparatus, initial rate exceeds 300 Hz, decaying to 30 Hz within 10 s. A fraction of 65% all observed annihilations due antihydrogen.
The main goal of the AEgIS experiment at CERN is to test weak equivalence principle for antimatter. will measure free-fall an antihydrogen beam traversing a moir\'e deflectometer. determine gravitational acceleration g with initial relative accuracy 1% by using emulsion detector combined silicon micro-strip time flight. Nuclear emulsions can annihilation vertex atoms precision about 1 - 2 microns r.m.s. We present here results detectors operated in vacuum low energy antiprotons from...