L. Mirasola
A5090936512- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- High-pressure geophysics and materials
- earthquake and tectonic studies
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- Seismic Waves and Analysis
- Neutrino Physics Research
- Meteorological Phenomena and Simulations
- Astronomical Observations and Instrumentation
- Distributed and Parallel Computing Systems
- Radioactivity and Radon Measurements
- Geophysics and Sensor Technology
- Particle Detector Development and Performance
- Radioactive Decay and Measurement Techniques
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Advanced Statistical Methods and Models
- Quantum, superfluid, helium dynamics
University of Cagliari
2022-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2024-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2023
University of California, Riverside
2023
Princeton University
2023
Dark matter with Planck-scale mass (≃10^{19} GeV/c^{2}) arises in well-motivated theories and could be produced by several cosmological mechanisms. A search for multiscatter signals from supermassive dark was performed a blind analysis of data collected over 813 d live time DEAP-3600, 3.3 t single-phase liquid argon-based detector at SNOLAB. No candidate were observed, leading to the first direct detection constraints on matter. Leading limits constrain masses between 8.3×10^{6} 1.2×10^{19}...
Superradiance clouds of kinetically-mixed dark photons around spinning black holes can produce observable multi-messenger electromagnetic and gravitational wave signals. The cloud generates electric fields up to a Teravolt-per-meter, which lead cascade production charged particles, yielding turbulent quasi-equilibrium plasma the hole, resulting in fluxes ranging from supernova pulsar-like luminosities. For stellar mass holes, such systems resemble millisecond pulsars are expected emit...
The half-life of $^{39}$Ar is measured using the DEAP-3600 detector located 2 km underground at SNOLAB. In 2016-2020, used a target mass (3269 $\pm$ 24) kg liquid argon distilled from atmosphere in direct-detection dark matter search. Such an also enables direct measurements isotope properties. decay dominant source triggers by two orders magnitude, ensuring high statistics and making well-suited for measuring this isotope's half-life. Use pulse-shape discrimination technique allows powerful...
Abstract The knowledge of scintillation quenching $$\alpha $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>α</mml:mi> </mml:math> -particles plays a paramount role in understanding -induced backgrounds and improving the sensitivity liquid argon-based direct detection dark matter experiments. We performed relative measurement MeV energy region using radioactive isotopes ( $$^{222}$$ <mml:mmultiscripts> <mml:mrow/> <mml:mn>222</mml:mn> </mml:mmultiscripts> Rn, $$^{218}$$...
Abstract The specific activity of the $$\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>β</mml:mi> </mml:math> decay $$^{39}$$ <mml:msup> <mml:mrow /> <mml:mn>39</mml:mn> </mml:msup> Ar in atmospheric argon is measured using DEAP-3600 detector. DEAP-3600, located 2 km underground at SNOLAB, uses a total (3269 ± 24) kg liquid distilled from atmosphere to search for dark matter. This detector well-suited measure owing its very low background levels. achieved two...
Abstract This work explores the relation between two data-analysis methods used in search for continuous gravitational waves LIGO-Virgo-KAGRA data: F-statistic and 5-vector method. We show that method can be derived from a maximum likelihood framework similar to F-statistic. Our analysis demonstrates are statistically equivalent, providing same detection probability given false alarm rate. extend this comparison multiple detectors, highlighting differences standard approach simply combines...
We present a novel semicoherent targeted search method for continuous gravitational waves (CWs) emitted by pulsars in binary systems. The is based on custom optimization of the coherence time, which tailored according to orbital parameters and their uncertainties, as provided electromagnetic observations. While rotating are expected produce quasimonochromatic CWs reference frame, motion introduces additional modulation observer's alongside caused Earth's motion. As result, received signal...
We propose a new fixed-target experiment for the study of electromagnetic and hard probes Quark-Gluon Plasma (QGP) in heavy-ion collisions at CERN SPS. The aims performing measurements dimuon spectrum from threshold up to charmonium region, hadronic decays charm strange hadrons. It is based on muon spectrometer, which includes toroidal magnet six planes tracking detectors, coupled vertex equipped with Si MAPS immersed dipole field. High luminosity an essential requirement experiment, goal...
The specific activity of the beta decay $^{39}$Ar in atmospheric argon is measured using DEAP-3600 detector. DEAP-3600, located 2 km underground at SNOLAB, uses a total (3269 $\pm$ 24) kg liquid distilled from atmosphere to search for dark matter. This detector with very low background pulseshape discrimination differentiate between nuclear recoils and electron well-suited measure $^{39}$Ar. With 167 live-days data, time extraction [0.964 0.001 (stat) 0.024 (sys)] Bq/kg$_{\rm atmAr}$ which...
We present a novel semi-coherent targeted search method for continuous gravitational waves (CW) emitted by pulsars in binary systems. The is based on custom optimization of the coherence time according to orbital parameters and their uncertainties, as provided electromagnetic observations. While rotating are expected produce quasi-monochromatic CWs reference frame, motion introduces an additional modulation observer alongside one due Earth's motion. As result, received signal dispersed...
The sensitivity of continuous gravitational-wave (CW) searches for unknown neutron stars (NSs) is limited by their parameter space breadth. To fit within reasonable computing budgets, hierarchical schemes are used to identify interesting candidates using affordable methods. resulting critically depends on the number selected follow-up. In this work, we present a novel framework evaluate effectiveness stochastic CW follow-ups. Our results in realistic datasets allow ten-fold reduction cost...
This work explores the relationship between two data-analysis methods used in search for continuous gravitational waves LIGO-Virgo-KAGRA data: $\mathcal{F}$-statistic and 5-vector method. We show that method can be derived from a maximum likelihood framework similar to $\mathcal{F}$-statistic. Our analysis demonstrates are statistically equivalent, providing same detection probability given false alarm rate. extend this comparison multiple detectors, highlighting differences standard...
The knowledge of scintillation quenching $\alpha$-particles plays a paramount role in understanding $\alpha$-induced backgrounds and improving the sensitivity liquid argon-based direct detection dark matter experiments. We performed relative measurement MeV energy region using radioactive isotopes ($^{222}$Rn, $^{218}$Po $^{214}$Po isotopes) present trace amounts DEAP-3600 detector quantified uncertainty extrapolating factor to low-energy region.
DEAP-3600, with its 3.3 tonnes liquid argon target, is a dark matter direct detection experiment set at SNOLAB in Sudbury, Canada. Since 2019, the has held most stringent exclusion limit for Weakly Interacting Massive Particles (WIMPs) above 20 GeV/c$^2$. Detector upgrades have been ongoing since end of second fill run 2020 to reduce backgrounds from shadowed alphas and dust dissolved it upcoming third run. In parallel that, physics reach widened, unique contributions WIMP search within...