A5064709853- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Cosmology and Gravitation Theories
- Muon and positron interactions and applications
- Quantum, superfluid, helium dynamics
- Radiation Effects in Electronics
- Computational Physics and Python Applications
- Particle accelerators and beam dynamics
- Atmospheric Ozone and Climate
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Nuclear reactor physics and engineering
- Solar and Space Plasma Dynamics
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2016-2025
University of Bologna
2016-2025
Sathyabama Institute of Science and Technology
2024
Xenon Pharmaceuticals (Canada)
2023-2024
University of Salerno
2024
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Salerno
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2024
Polytechnic University of Bari
2023
DeepMind (United Kingdom)
2023
University of Zurich
2023
We report on a search for weakly interacting massive particles (WIMPs) using 278.8 days of data collected with the XENON1T experiment at LNGS. utilizes liquid xenon time projection chamber fiducial mass (1.30±0.01) ton, resulting in 1.0 ton yr exposure. The energy region interest, [1.4,10.6] keV_{ee} ([4.9,40.9] keV_{nr}), exhibits an ultralow electron recoil background rate [82_{-3}^{+5}(syst)±3(stat)] events/(ton keV_{ee}). No significant excess over is found, and profile likelihood...
We report on a search for particle dark matter with the XENON100 experiment, operated at Laboratori Nazionali del Gran Sasso 13 months during 2011 and 2012. features an ultralow electromagnetic background of (5.3 ± 0.6) × 10(-3) events/(keV(ee) kg day) in energy region interest. A blind analysis 224.6 live days 34 exposure has yielded no evidence interactions. The two candidate events observed predefined nuclear recoil range 6.6-30.5 keV(nr) are consistent expectation (1.0 0.2) events....
We present results from the direct search for dark matter with XENON100 detector, installed underground at Laboratori Nazionali del Gran Sasso of INFN, Italy. is a two-phase time projection chamber 62 kg liquid xenon target. Interaction vertex reconstruction in three dimensions millimeter precision allows to select only innermost 48 as ultra-low background fiducial In 100.9 live days data, acquired between January and June 2010, no evidence found. Three candidate events were observed...
DARk matter WImp search with liquid xenoN (DARWIN) will be an experiment for the direct detection of dark using a multi-ton xenon time projection chamber at its core. Its primary goal to explore experimentally accessible parameter space Weakly Interacting Massive Particles (WIMPs) in wide mass-range, until neutrino interactions target become irreducible background. The prompt scintillation light and charge signals induced by particle observed VUV sensitive, ultra-low background photosensors....
The XENON1T experiment is currently in the commissioning phase at Laboratori Nazionali del Gran Sasso, Italy. In this article we study experiment's expected sensitivity to spin-independent WIMP-nucleon interaction cross section, based on Monte Carlo predictions of electronic and nuclear recoil backgrounds. total background $1$ tonne fiducial volume ($1$, $12$) keV equivalent energy region, before applying any selection discriminate between recoils, $(1.80 \pm 0.15) \cdot 10^{-4}$ ($\rm{kg}...
We present new experimental constraints on the elastic, spin-dependent WIMP-nucleon cross section using recent data from XENON100 experiment, operated in Laboratori Nazionali del Gran Sasso Italy. An analysis of 224.6 live days×34 kg exposure acquired during 2011 and 2012 revealed no excess signal due to axial-vector WIMP interactions with 129Xe 131Xe nuclei. This leads most stringent upper limits WIMP-neutron sections for masses above 6 GeV/c², a minimum 3.5×10(-40) cm² at mass 45 90%...
Background: Recognizing the need for good quality, scientific and reliable information strengthening mental health policies programmes, National Mental Health Survey (NMHS) of India was implemented by Institute Neurosciences (NIMHANS), Bangalore, in year 2015–2016. Aim: To estimate prevalence, socio-demographic correlates treatment gap morbidity a representative population India. Methods: NMHS conducted across 12 Indian states where trained field investigators completed 34,802 interviews...
The field of dark matter detection is a highly visible and competitive one. In this paper, we propose recommendations for presenting direct results particularly suited weak-scale searches, although believe the spirit can apply more broadly to searches other candidates, such as very light or axions. To translate experimental data into final published result, collaborations must make series choices in their analysis, ranging from how model astrophysical parameters statistical inferences based...
Fundamental algorithms such as sorting or hashing are used trillions of times on any given day1. As demand for computation grows, it has become critical these to be performant possible. Whereas remarkable progress been achieved in the past2, making further improvements efficiency routines proved challenging both human scientists and computational approaches. Here we show how artificial intelligence can go beyond current state art by discovering hitherto unknown routines. To realize this,...
We present the first results of searches for axions and axion-like-particles with XENON100 experiment. The axion-electron coupling constant, $g_{Ae}$, has been probed by exploiting axio-electric effect in liquid xenon. A profile likelihood analysis 224.6 live days $\times$ 34 kg exposure shown no evidence a signal. By rejecting larger than $7.7 \times 10^{-12}$ (90\% CL) solar axion search, we set best limit to date on this coupling. In frame DFSZ KSVZ models, exclude QCD heavier 0.3...
We report on WIMP search results of the XENON100 experiment, combining three runs summing up to 477 live days from January 2010 2014. Data first two were already published. A blind analysis was applied last run recorded between April 2013 and 2014 prior results. The ultra-low electromagnetic background ~$5 \times 10^{-3}$ events/(keV$_{\mathrm{ee}}\times$kg$\times$day) before electronic recoil rejection, together with increased exposure 48 kg $\times$ yr improves sensitivity. profile...
We perform a low-mass dark matter search using an exposure of $30\text{ }\text{ }\mathrm{kg}\ifmmode\times\else\texttimes\fi{}\mathrm{yr}$ with the XENON100 detector. By dropping requirement scintillation signal and only ionization to determine interaction energy, we lowered energy threshold for detection 0.7 keV nuclear recoils. No can be claimed because complete background model cannot constructed without primary signal. Instead, compute upper limit on WIMP-nucleon scattering cross section...
We study the sensitivity of multi ton-scale time projection chambers using a liquid xenon target, e.g., proposed DARWIN instrument, to spin-independent and spin-dependent WIMP-nucleon scattering interactions. Taking into account realistic backgrounds from detector itself as well neutrinos, we examine impact exposure, energy threshold, background rejection efficiency resolution on dark matter sensitivity. With an exposure 200 t × y assuming parameters which have been already demonstrated...
Dark matter detectors that utilize liquid xenon have now achieved tonne-scale targets, giving them sensitivity to all flavours of supernova neutrinos via coherent elastic neutrino-nucleus scattering. Considering for the first time a realistic detector model, we simulate expected neutrino signal different progenitor masses and nuclear equations state in existing upcoming dual-phase experiments. We show proportional scintillation (S2) allows clear observation guarantees particularly low energy...
Understanding the burden and pattern of mental disorders as well mapping existing resources for delivery health services in India, has been a felt need over decades. Recognizing this necessity, Ministry Health Family Welfare, Government commissioned National Mental Survey (NMHS) year 2014–15. The NMHS aimed to estimate prevalence India identify current treatment gaps, patterns health-care seeking, service utilization patterns, along with an understanding impact disability due these...
The low-background, VUV-sensitive 3-inch diameter photomultiplier tube R11410 has been developed by Hamamatsu for dark matter direct detection experiments using liquid xenon as the target material. We present results from joint effort between XENON collaboration and company to produce a highly radio-pure photosensor (version R11410-21) XENON1T experiment. After introducing its components, we show methods of radioactive contamination measurements individual materials employed in production....
XENON is a dark matter direct detection project, consisting of time projection chamber (TPC) filled with liquid xenon as medium. The construction the next generation detector, XENON1T, presently taking place at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It aims sensitivity to spin-independent cross sections 2 · 10-47 c for WIMP masses around 50 GeV2, which requires background reduction by two orders magnitude compared XENON100, current detector. An active system that able tag muons...
We report on a search for electronic recoil event rate modulation signatures in the XENON100 data accumulated over period of 4 years, from January 2010 to 2014. A profile likelihood method, which incorporates stability detector and known background model, is used quantify significance periodicity time distribution events. There weak signature at $431^{+16}_{-14}$ days low energy region $(2.0-5.8)$ keV single scatter sample, with global $1.9\,\sigma$, however no other more significant...
Abstract The DARWIN observatory is a proposed next-generation experiment to search for particle dark matter and the neutrinoless double beta decay of $$^{136}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>136</mml:mn> </mml:msup> </mml:math> Xe. Out its 50 t total natural xenon inventory, 40 will be active target time projection chamber which thus contains about 3.6 Here, we show that projected half-life sensitivity $$2.4\times {10}^{27}\,{\hbox...
The XENON100 experiment has recently completed a dark matter run with 100.9 live-days of data, taken from January to June 2010. Events in 48kg fiducial volume the energy range between 8.4 and 44.6 keVnr have been analyzed. A total three events found predefined signal region, compatible background prediction (1.8 \pm 0.6) events. Based on this analysis we present limits WIMP-nucleon cross section for inelastic matter. With data are able rule out explanation observed DAMA/LIBRA modulation as...
Results from the nuclear recoil calibration of XENON100 dark matter detector installed underground at Laboratori Nazionali del Gran Sasso (LNGS), Italy are presented. Data measurements with an external 241AmBe neutron source compared a detailed Monte Carlo simulation which is used to extract energy dependent charge-yield Qy and relative scintillation efficiency Leff. A very good level absolute spectral matching achieved in both observable signal channels - S1 ionization S2 along agreement...
Laboratory experiments searching for galactic dark matter particles scattering off nuclei have so far not been able to establish a discovery. We use data from the XENON100 experiment search interacting with electrons. With no evidence signal above low background of our experiment, we exclude variety representative models that would induce electronic recoils. For axial-vector couplings electrons, cross-sections 6x10^(-35) cm^2 particle masses m_chi = 2 GeV/c^2. Independent halo, leptophilic...
The XENON100 dark matter experiment uses liquid xenon in a time projection chamber (TPC) to measure nuclear recoils resulting from the scattering of weakly interacting massive particles (WIMPs). In this paper, we report observation single-electron charge signals which are not related WIMP interactions. These signals, show excellent sensitivity detector small explained as being due photoionization impurities and metal components inside TPC. They used unique calibration source characterize...
We present the first constraints on spin-dependent, inelastic scattering cross section of weakly interacting massive particles (WIMPs) nucleons from XENON100 data with an exposure $7.64\ifmmode\times\else\texttimes\fi{}{10}^{3}\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\text{days}$. is a dual-phase xenon time projection chamber 62 kg active mass, operated at Laboratori Nazionali del Gran Sasso (LNGS) in Italy and designed to search for nuclear recoils WIMP-nucleus...