T. Marrodán Undagoitia
A5074927846- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Scientific Research and Discoveries
- Inorganic Fluorides and Related Compounds
- Quantum Chromodynamics and Particle Interactions
- Atmospheric Ozone and Climate
- Advanced Semiconductor Detectors and Materials
- Photocathodes and Microchannel Plates
- Nuclear reactor physics and engineering
- Astronomy and Astrophysical Research
- Superconducting Materials and Applications
- Quantum Electrodynamics and Casimir Effect
- High-Energy Particle Collisions Research
- Quantum Mechanics and Applications
- Computational Physics and Python Applications
- Pulsars and Gravitational Waves Research
- Gaussian Processes and Bayesian Inference
Max Planck Institute for Nuclear Physics
2015-2024
Xenon Pharmaceuticals (Canada)
2023-2024
University of Zurich
2009-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2023
Max Planck Society
2012-2020
Max Planck Innovation
2012-2013
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2011
Johannes Gutenberg University Mainz
2011
Technical University of Munich
2005-2010
In-Q-Tel
2008
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 report the first dark matter search results from XENON1T, a ∼2000-kg-target-mass dual-phase (liquid-gas) xenon time projection chamber in operation at Laboratori Nazionali del Gran Sasso Italy and ton-scale detector of this kind. The blinded used 34.2 live days data acquired between November 2016 January 2017. Inside (1042±12)-kg fiducial mass [5,40] keV_{nr} energy range interest for weakly interacting massive particle (WIMP) searches, electronic recoil background was (1.93±0.25)×10^{-4}...
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 report results from searches for new physics with low-energy electronic recoil data recorded the XENON1T detector. With an exposure of 0.65 tonne-years and unprecedentedly low background rate 76±2stat events/(tonne×year×keV) between 1 30 keV, enable one most sensitive solar axions, enhanced neutrino magnetic moment using neutrinos, bosonic dark matter. An excess over known backgrounds is observed at energies prominent 2 3 keV. The axion model has a 3.4σ significance, three-dimensional 90%...
We report constraints on light dark matter (DM) models using ionization signals in the XENON1T experiment. mitigate backgrounds with strong event selections, rather than requiring a scintillation signal, leaving an effective exposure of (22±3) tonne day. Above ∼0.4 keV_{ee}, we observe <1 event/(tonne day keV_{ee}), which is more 1000 times lower similar searches other detectors. Despite observing higher rate at energies, no DM or CEvNS detection may be claimed because cannot model all our...
The XENON100 experiment, in operation at the Laboratori Nazionali del Gran Sasso Italy, is designed to search for dark matter WIMPs scattering off 62 kg of liquid xenon an ultra-low background dual-phase time projection chamber. In this letter, we present first results from analysis 11.17 live days non-blind data, acquired October and November 2009. selected fiducial target 40 kg, within pre-defined signal region, observe no events hence exclude spin-independent WIMP-nucleon elastic...
XENONnT is a dark matter direct detection experiment, utilizing 5.9 t of instrumented liquid xenon, located at the INFN Laboratori Nazionali del Gran Sasso. In this work, we predict experimental background and project sensitivity to weakly interacting massive particles (WIMPs). The expected average differential rate in energy region interest, corresponding (1, 13) keV (4, 50) for electronic nuclear recoils, amounts $12.3 \pm 0.6$ (keV y)$^{-1}$ $(2.2\pm 0.5)\times 10^{-3}$ y)$^{-1}$,...
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%...
In the past decades, several detector technologies have been developed with quest to directly detect dark matter interactions and test one of most important unsolved questions in modern physics. The sensitivity these experiments has improved a tremendous speed due constant development detectors analysis methods, proving uniquely suited devices solve puzzle, as all other discovery strategies can only indirectly infer its existence. Despite overwhelming evidence for from cosmological...
The XENON1T experiment at the Laboratori Nazionali del Gran Sasso (LNGS) is first WIMP dark matter detector operating with a liquid xenon target mass above ton-scale. Out of its 3.2t inventory, 2.0t constitute active dual-phase time projection chamber. scintillation and ionization signals from particle interactions are detected low-background photomultipliers. This article describes instrument subsystems as well strategies to achieve an unprecedented low background level. First results on...
We report the first experimental results on spin-dependent elastic weakly interacting massive particle (WIMP) nucleon scattering from XENON1T dark matter search experiment. The analysis uses full ton year exposure of to constrain proton-only and neutron-only cases. No significant signal excess is observed, a profile likelihood ratio used set exclusion limits WIMP-nucleon interactions. This includes most stringent constraint date WIMP-neutron cross section, with minimum 6.3×10^{-42} cm^{2} at...
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...
Direct dark matter detection experiments based on a liquid xenon target are leading the search for particles with masses above $\sim$ 5 GeV/c$^2$, but have limited sensitivity to lighter because of small momentum transfer in matter-nucleus elastic scattering. However, there is an irreducible contribution from inelastic processes accompanying scattering, which leads excitation and ionization recoiling atom (the Migdal effect) or emission Bremsstrahlung photon. In this letter, we report probe...
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,...
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...
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...
Many experiments that aim at the direct detection of Dark Matter are able to distinguish a dominant background from expected feeble signals, based on some measured discrimination parameter. We develop statistical model for such using Profile Likelihood ratio as test statistic in frequentist approach. take data calibrations control measurements signal and background, method allows inclusion Monte Carlo simulations. Systematic detector uncertainties, uncertainties energy scale, well...
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...