A5075929864- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Cosmology and Gravitation Theories
- Atmospheric Ozone and Climate
- Pulsars and Gravitational Waves Research
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Photocathodes and Microchannel Plates
- Cold Atom Physics and Bose-Einstein Condensates
- Radiation Therapy and Dosimetry
- Astro and Planetary Science
- Gaussian Processes and Bayesian Inference
- Nuclear reactor physics and engineering
- Radio Astronomy Observations and Technology
- Advanced NMR Techniques and Applications
- Muon and positron interactions and applications
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2017-2024
Max Planck Institute for Nuclear Physics
2023-2024
Gran Sasso Science Institute
2021-2024
Paul Scherrer Institute
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2022
AlbaNova
2021
Sapienza University of Rome
2014-2021
University of L'Aquila
2017-2021
Stockholm University
2021
Johannes Gutenberg University Mainz
2021
We report on the first search for nuclear recoils from dark matter in form of weakly interacting massive particles (WIMPs) with XENONnT experiment, which is based a two-phase time projection chamber sensitive liquid xenon mass 5.9 ton. During (1.09±0.03) ton yr exposure used this search, intrinsic ^{85}Kr and ^{222}Rn concentrations target are reduced to unprecedentedly low levels, giving an electronic recoil background rate (15.8±1.3) events/ton keV region interest. A blind analysis events...
We report on a blinded analysis of low-energy electronic-recoil data from the first science run XENONnT dark matter experiment. Novel subsystems and increased 5.9 tonne liquid xenon target reduced background in (1, 30) keV search region to $(15.8 \pm 1.3)$ events/(tonne$\times$year$\times$keV), lowest ever achieved detector $\sim$5 times lower than XENON1T. With an exposure 1.16 tonne-years, we observe no excess above set stringent new limits solar axions, enhanced neutrino magnetic moment,...
The nature of dark matter and properties neutrinos are among the most pressing issues in contemporary particle physics. dual-phase xenon time-projection chamber is leading technology to cover available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity many alternative candidates. These detectors can also study through neutrinoless double-beta decay a variety astrophysical sources. A next-generation xenon-based detector will therefore be...
Delayed single- and few-electron emissions plague dual-phase time projection chambers, limiting their potential to search for light-mass dark matter. This paper examines the origins of these events in XENON1T experiment. Characterization intensity delayed electron backgrounds shows that resulting are correlated, position, with high-energy can effectively be vetoed. In this work we extend previous S2-only analyses down a single electron. From analysis, after removing correlated backgrounds,...
We present the first measurement of nuclear recoils from solar <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>8</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> neutrinos via coherent elastic neutrino-nucleus scattering with XENONnT dark matter experiment. The central detector is a low-background, two-phase time projection chamber 5.9 t sensitive...
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
We present an improved measurement of the carbon-nitrogen-oxygen (CNO) solar neutrino interaction rate at Earth obtained with complete Borexino Phase-III dataset. The measured rate, R_{CNO}=6.7_{-0.8}^{+2.0} counts/(day×100 tonnes), allows us to exclude absence CNO signal about 7σ C.L. correspondent flux is 6.6_{-0.9}^{+2.0}×10^{8} cm^{-2} s^{-1}, taking into account flavor conversion. use new evaluate C and N abundances in Sun respect H abundance for first time neutrinos. Our result...
The multi-staged XENON program at INFN Laboratori Nazionali del Gran Sasso aims to detect dark matter with two-phase liquid xenon time projection chambers of increasing size and sensitivity. XENONnT experiment is the latest detector in program, planned be an upgrade its predecessor XENON1T. It features active target 5.9 tonnes cryogenic (8.5 total mass cryostat). expected extend sensitivity WIMP by more than order magnitude compared XENON1T, thanks larger significantly reduced background,...
The selection of low-radioactive construction materials is the utmost importance for rare-event searches and thus critical to XENONnT experiment. Results an extensive radioassay program are reported, in which material samples have been screened with gamma-ray spectroscopy, mass spectrometry, 222 Rn emanation measurements. Furthermore, cleanliness procedures applied remove or mitigate surface contamination detector described. Screening results, used as inputs a Monte Carlo simulation, predict...
We report the first measurement of CNO solar neutrinos by Borexino that uses Correlated Integrated Directionality (CID) method, exploiting sub-dominant Cherenkov light in liquid scintillator detector. The directional information origin is preserved fast photons from neutrino scattered electrons, and used to discriminate between signal background. independent spectral on which previous measurements were based. While analysis could only be applied Phase-III dataset, can use complete data...
Abstract The oscillation of neutron n into mirror $$n'$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>n</mml:mi> <mml:mo>′</mml:mo> </mml:msup> </mml:math> , its mass degenerate partner from dark sector, can gradually transform the stars mixed consisting in part matter. In quark $$n-n'$$ <mml:mrow> <mml:mo>-</mml:mo> </mml:mrow> transitions are suppressed. We study structure and derive mass-radius scaling relations between configurations purely star maximally...
We present results on the search for double-electron capture ($2\nu\text{ECEC}$) of $^{124}$Xe and neutrinoless double-$\beta$ decay ($0\nu\beta\beta$) $^{136}$Xe in XENON1T. consider captures from K- up to N-shell $2\nu\text{ECEC}$ signal model measure a total half-life $T_{1/2}^{2\nu\text{ECEC}}=(1.1\pm0.2_\text{stat}\pm0.1_\text{sys})\times 10^{22}\;\text{yr}$ with $0.87\;\text{kg}\times\text{yr}$ isotope exposure. The statistical significance is $7.0\,\sigma$. use XENON1T data...
While the international nEDM collaboration at Paul Scherrer Institut (PSI) took data in 2017 that covered a considerable fraction of parameter space claimed potential signals hypothetical neutron (n) to mirror-neutron (n′) transitions, it could not test all signal regions various mirror magnetic fields. Therefore, new study n−n′ oscillations using stored ultracold neutrons (UCNs) is underway PSI, considerably expanding reach fields (B′) and oscillation time constants (τnn′). The apparatus...
Liquid scintillator detectors play a central role in the detection of neutrinos from various sources. In particular, it is only technique used so far for precision spectroscopy sub-MeV solar neutrinos, as demonstrated by Borexino experiment at Gran Sasso National Laboratory Italy. The benefit high light yield, and thus low energy threshold good resolution, comes cost directional information featured water Cherenkov detectors, measuring 8B above few MeV. this paper we provide first...
Abstract Neutrinos emitted in the carbon, nitrogen, oxygen (CNO) fusion cycle Sun are a sub-dominant, yet crucial component of solar neutrinos whose flux has not been measured yet. The Borexino experiment at Laboratori Nazionali del Gran Sasso (Italy) unique opportunity to detect them directly thanks detector’s radiopurity and precise understanding detector backgrounds. We discuss sensitivity CNO neutrinos, which is based on strategies we adopted constrain rates two most relevant background...
Abstract The precision in reconstructing events detected a dual-phase time projection chamber depends on an homogeneous and well understood electric field within the liquid target. In XENONnT TPC homogeneity is achieved through double-array cage, consisting of two nested arrays shaping rings connected by easily accessible resistor chain. Rather than being to gate electrode, topmost ring independently biased, adding degree freedom tune during operation. Two-dimensional finite element...
Multiple viable theoretical models predict heavy dark matter particles with a mass close to the Planck mass, range relatively unexplored by current experimental measurements. We use 219.4 days of data collected XENON1T experiment conduct blind search for signals from multiply interacting massive (MIMPs). Their unique track signature allows targeted analysis only 0.05 expected background events muons. Following unblinding, we observe no signal candidate events. This Letter places strong...
Present probes do not exclude that the neutron ($n$) oscillation into mirror ($n'$), a sterile state exactly degenerate in mass with neutron, can be very fast process, fact faster than decay itself. This process is sensitive to magnetic field. Namely, if field $\vec{B}'$ exists at Earth, $n-n'$ probability suppressed or resonantly amplified by applied $\vec{B}$, depending on its strength and angle $\beta$ between $\vec{B}$ $\vec{B}'$. We present results of ultra-cold storage measurements...
In this work, we expand on the XENON1T nuclear recoil searches to study individual signals of dark matter interactions from operators up dimension eight in a chiral effective field theory (ChEFT) and model inelastic (iDM). We analyze data two science runs detector totaling <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">t</a:mi><a:mo>×</a:mo><a:mi>yr</a:mi></a:mrow></a:math>...
Abstract The XENONnT detector uses the latest and largest liquid xenon-based time projection chamber (TPC) operated by XENON Collaboration, aimed at detecting Weakly Interacting Massive Particles conducting other rare event searches. data acquisition (DAQ) system constitutes an upgraded expanded version of XENON1T DAQ system. For its operation, it relies predominantly on commercially available hardware accompanied open-source custom-developed software. three constituent subsystems detector,...
We developed a detector signal characterization model based on Bayesian network trained the waveform attributes generated by dual-phase xenon time projection chamber. By performing inference model, we produced quantitative metric of and demonstrate that this can be used to determine whether is sourced from scintillation or an ionization process. describe method its performance electronic-recoil (ER) data taken during first science run XENONnT dark matter experiment. use in waveform-based...
Abstract Cosmogenic radio-nuclei are an important source of background for low-energy neutrino experiments. In Borexino, cosmogenic $$^{11}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>11</mml:mn> </mml:msup> </mml:math> C decays outnumber solar pep and CNO events by about ten to one. order extract the flux these two species, a highly efficient identification this is mandatory. We present here details most consolidated strategy, used throughout...