A. Brown
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View article: From Commissioning to Precision Data-Taking: Resolving Operational Challenges in the Nab Detector Systems
From Commissioning to Precision Data-Taking: Resolving Operational Challenges in the Nab Detector Systems Open
Our understanding of the weak mixing of quarks, described by the Cabibbo Kobayashi Maskawa (CKM) matrix, currently presents an anomaly. Thanks to major strides in both theory and experiment, improved precision in determinations of the firs…
View article: The XLZD Design Book: towards the next-generation liquid xenon observatory for dark matter and neutrino physics
The XLZD Design Book: towards the next-generation liquid xenon observatory for dark matter and neutrino physics Open
This report describes the experimental strategy and technologies for XLZD, the next-generation xenon observatory sensitive to dark matter and neutrino physics. In the baseline design, the detector will have an active liquid xenon target of…
View article: Spectral Measurement of the $^{214}$Bi beta-decay to the $^{214}$Po Ground State with XENONnT
Spectral Measurement of the $^{214}$Bi beta-decay to the $^{214}$Po Ground State with XENONnT Open
We report the measurement of the $^{214}$Bi beta-decay spectrum to the ground state of $^{214}$Po using the XENONnT detector. This decay is classified as first-forbidden non-unique, for which theoretical predictions require detailed nuclea…
View article: WIMP Dark Matter Search Using a 3.1 Tonne-Year Exposure of the XENONnT Experiment
WIMP Dark Matter Search Using a 3.1 Tonne-Year Exposure of the XENONnT Experiment Open
We report on a search for weakly interacting massive particle (WIMP) dark matter (DM) via elastic DM-xenon-nucleus interactions in the XENONnT experiment. We combine datasets from the first and second science campaigns resulting in a total…
View article: Ultra-pure Nickel for Structural Components of Low-Radioactivity Instruments
Ultra-pure Nickel for Structural Components of Low-Radioactivity Instruments Open
The next generation of rare-event search experiments in nuclear and particle physics demand structural materials combining exceptional mechanical strength with ultra-low levels of radioactive contamination. This study evaluates chemical va…
View article: Ultra-sensitive radon assay using an electrostatic chamber in a recirculating system
Ultra-sensitive radon assay using an electrostatic chamber in a recirculating system Open
View article: Sensitivity of nEXO to $^{136}$Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter
Sensitivity of nEXO to $^{136}$Xe Charged-Current Interactions: Background-free Searches for Solar Neutrinos and Fermionic Dark Matter Open
We study the sensitivity of nEXO to solar neutrino charged-current interactions, $ν_e + ^{136}$Xe$\rightarrow ^{136}$Cs$^* + e^-$, as well as analogous interactions predicted by models of fermionic dark matter. Due to the recently observed…
View article: The neutron veto of the XENONnT experiment: results with demineralized water
The neutron veto of the XENONnT experiment: results with demineralized water Open
View article: Competing structures in the beyond neutron N=104 midshell nucleus 184Pb
Competing structures in the beyond neutron N=104 midshell nucleus 184Pb Open
View article: XENONnT WIMP search: Signal and background modeling and statistical inference
XENONnT WIMP search: Signal and background modeling and statistical inference Open
The XENONnT experiment searches for weakly interacting massive particle (WIMP) dark matter scattering off a xenon nucleus. In particular, XENONnT uses a dual-phase time projection chamber with a 5.9-ton liquid xenon target, detecting both …
View article: Search for Light Dark Matter in Low-Energy Ionization Signals from XENONnT
Search for Light Dark Matter in Low-Energy Ionization Signals from XENONnT Open
We report on a blinded search for dark matter with single- and few-electron signals in the first science run of XENONnT relying on a novel detector response framework that is physics model dependent. We derive 90% confidence upper limits f…
View article: WIMP Dark Matter Search using a 3.1 tonne $\times$ year Exposure of the XENONnT Experiment
WIMP Dark Matter Search using a 3.1 tonne $\times$ year Exposure of the XENONnT Experiment Open
We report on a search for weakly interacting massive particle (WIMP) dark matter (DM) via elastic DM-xenon-nucleus interactions in the XENONnT experiment. We combine datasets from the first and second science campaigns resulting in a total…
View article: A review of NEST models for liquid xenon and an exhaustive comparison with other approaches
A review of NEST models for liquid xenon and an exhaustive comparison with other approaches Open
This paper discusses the microphysical simulation of interactions in liquid xenon, the active detector medium in many leading rare-event searches for new physics, and describes experimental observables useful for understanding detector per…
View article: New insights on fission of 235U induced by high energy neutrons from a new measurement at n_TOF
New insights on fission of 235U induced by high energy neutrons from a new measurement at n_TOF Open
View article: Low-Energy Nuclear Recoil Calibration of XENONnT with a $^{88}$YBe Photoneutron Source
Low-Energy Nuclear Recoil Calibration of XENONnT with a $^{88}$YBe Photoneutron Source Open
Characterizing low-energy (O(1keV)) nuclear recoils near the detector threshold is one of the major challenges for large direct dark matter detectors. To that end, we have successfully used a Yttrium-Beryllium photoneutron source that emit…
View article: Overcoming photobleaching in imaging of single barium atoms in a solid xenon matrix
Overcoming photobleaching in imaging of single barium atoms in a solid xenon matrix Open
Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond the Standard Model of particle physics. One of the isotopes under investigation is Xe
View article: Search for Light Dark Matter in Low-Energy Ionization Signals from XENONnT
Search for Light Dark Matter in Low-Energy Ionization Signals from XENONnT Open
We report on a blinded search for dark matter with single- and few-electron signals in the first science run of XENONnT relying on a novel detector response framework that is physics-model-dependent. We derive 90\% confidence upper limits …
View article: First Indication of Solar <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">B</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Neutrinos via Coherent Elastic Neutrino-Nucleus Scattering with XENONnT
First Indication of Solar Neutrinos via Coherent Elastic Neutrino-Nucleus Scattering with XENONnT Open
We present the first measurement of nuclear recoils from solar B
View article: Neutrinoless Double Beta Decay Sensitivity of the XLZD Rare Event Observatory
Neutrinoless Double Beta Decay Sensitivity of the XLZD Rare Event Observatory Open
The XLZD collaboration is developing a two-phase xenon time projection chamber with an active mass of 60 to 80 t capable of probing the remaining WIMP-nucleon interaction parameter space down to the so-called neutrino fog. In this work we …
View article: The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics Open
This report describes the experimental strategy and technologies for XLZD, the next-generation xenon observatory sensitive to dark matter and neutrino physics. In the baseline design, the detector will have an active liquid xenon target of…
View article: Model-independent searches of new physics in DARWIN with a semi-supervised deep learning pipeline
Model-independent searches of new physics in DARWIN with a semi-supervised deep learning pipeline Open
We present a novel deep learning pipeline to perform a model-independent, likelihood-free search for anomalous (i.e., non-background) events in the proposed next generation multi-ton scale liquid Xenon-based direct detection experiment, DA…
View article: The XENONnT dark matter experiment
The XENONnT dark matter experiment Open
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. The XENONnT experiment is the latest detector in…
View article: First Indication of Solar $^8$B Neutrinos via Coherent Elastic\n Neutrino-Nucleus Scattering with XENONnT
First Indication of Solar $^8$B Neutrinos via Coherent Elastic\n Neutrino-Nucleus Scattering with XENONnT Open
We present the first measurement of nuclear recoils from solar $^8$B\nneutrinos via coherent elastic neutrino-nucleus scattering with the XENONnT\ndark matter experiment. The central detector of XENONnT is a low-background,\ntwo-phase time…
View article: Offline tagging of radon-induced backgrounds in XENON1T and applicability to other liquid xenon time projection chambers
Offline tagging of radon-induced backgrounds in XENON1T and applicability to other liquid xenon time projection chambers Open
This paper details the first application of a software tagging algorithm to reduce radon-induced backgrounds in liquid noble element time projection chambers, such as XENON1T and XENONnT. The convection velocity field in XENON1T was mapped…
View article: Imaging of single barium atoms in a second matrix site in solid xenon for barium tagging in a $^{136}$Xe double beta decay experiment
Imaging of single barium atoms in a second matrix site in solid xenon for barium tagging in a $^{136}$Xe double beta decay experiment Open
Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond the Standard Model of particle physics. One of the isotopes under investigation is $^{136}$Xe, which would double beta decay into $^{136}$Ba. Detecti…
View article: XENONnT WIMP Search: Signal & Background Modeling and Statistical Inference
XENONnT WIMP Search: Signal & Background Modeling and Statistical Inference Open
The XENONnT experiment searches for weakly-interacting massive particle (WIMP) dark matter scattering off a xenon nucleus. In particular, XENONnT uses a dual-phase time projection chamber with a 5.9-tonne liquid xenon target, detecting bot…
View article: Effective field theory and inelastic dark matter results from XENON1T
Effective field theory and inelastic dark matter results from XENON1T Open
In this work, we expand on the XENON1T nuclear recoil searches to study the individual signals of dark matter interactions from operators up to dimension eight in a chiral effective field theory (ChEFT) and a model of inelastic dark matter…
View article: Proportional scintillation in liquid xenon: demonstration in a single-phase liquid-only time projection chamber
Proportional scintillation in liquid xenon: demonstration in a single-phase liquid-only time projection chamber Open
The largest direct dark matter search experiments to date employ dual-phase time projection chambers (TPCs) with liquid noble gas targets. These detect both the primary photons generated by particle interactions in the liquid target, as we…
View article: PANCAKE: a large-diameter cryogenic test platform with a flat floor for next generation multi-tonne liquid xenon detectors
PANCAKE: a large-diameter cryogenic test platform with a flat floor for next generation multi-tonne liquid xenon detectors Open
The PANCAKE facility is the world's largest liquid xenon test platform. Inside its cryostat with an internal diameter of 2.75 m, components for the next generation of liquid xenon experiments, such as DARWIN or XLZD, will be tested at thei…
View article: Offline tagging of radon-induced backgrounds in XENON1T and applicability to other liquid xenon detectors
Offline tagging of radon-induced backgrounds in XENON1T and applicability to other liquid xenon detectors Open
This paper details the first application of a software tagging algorithm to reduce radon-induced backgrounds in liquid noble element time projection chambers, such as XENON1T and XENONnT. The convection velocity field in XENON1T was mapped…