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View article: The HIBEAM instrument at the European spallation source
The HIBEAM instrument at the European spallation source Open
The European spallation source (ESS) will be the world’s brightest neutron source and will open a new intensity frontier in particle physics. The HIBEAM collaboration aims to exploit the unique potential of the ESS with a dedicated ESS ins…
View article: Improved limits on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mi>n</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math> transformation from the Spallation Neutron Source
Improved limits on transformation from the Spallation Neutron Source Open
Conversions between neutrons n and dark matter candidate sterile neutrons n′ have been proposed as a mechanism for baryon number B violation. In the case that there is a small mass difference Δm between the n and the n′ states, oscillation…
View article: Honneth as a Reader of Sartre. On the Limits of the Honnethian Interpretation of Sartre’s Paradigm of Recognition
Honneth as a Reader of Sartre. On the Limits of the Honnethian Interpretation of Sartre’s Paradigm of Recognition Open
After tracing the way in which Honneth interprets Sartre’s theory of intersubjectivity and seeing how it is essentially based on the consideration of Being and Nothingness, this article aims to discuss some of the theses of the Sartrian pa…
View article: HighNESS conceptual design report: Volume I
HighNESS conceptual design report: Volume I Open
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supporte…
View article: HighNESS conceptual design report: Volume II. The NNBAR experiment.
HighNESS conceptual design report: Volume II. The NNBAR experiment. Open
A key aim of the HighNESS project for the European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report for the NNBAR experiment. NNBAR would exploit a new cold lower mod…
View article: Neutron instrument concepts for a high intensity moderator at the European spallation source
Neutron instrument concepts for a high intensity moderator at the European spallation source Open
In the course of the Horizon 2020 project HighNESS, a second moderator concept has been developed for the European Spallation Source, which complements the currently built moderator and is optimized for high intensity with a large viewable…
View article: Neutron Instrument Concepts for a High Intensity Moderator at the European Spallation Source
Neutron Instrument Concepts for a High Intensity Moderator at the European Spallation Source Open
In the course of the Horizon 2020 project HighNESS, a second moderator concept has been developed for the European Spallation Source which complements the currently built moderator and is optimized for high intensity with a large viewable …
View article: Improved Limits on $n \rightarrow n'$ Transformation from the Spallation Neutron Source
Improved Limits on $n \rightarrow n'$ Transformation from the Spallation Neutron Source Open
Conversions between neutrons $n$ and Dark Matter candidate sterile neutrons $n'$ have been proposed as a mechanism for Baryon Number $\mathcal{B}$ violation. In the case that there is a small mass difference $Δ{m}$ between the $n$ and the …
View article: Future ESS upgrade to Medium Pulse Length – What are the technical challenges for the accelerator and target?
Future ESS upgrade to Medium Pulse Length – What are the technical challenges for the accelerator and target? Open
A compression of the ESS proton pulse from the present 2.86 milliseconds to a medium pulse length of a few tens of microseconds which is better matched to the moderator time-constant of thermal neutrons would considerably boost the perform…
View article: Model-independent extraction of form factors and $|V_{cb}|$ in $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ with hadronic tagging at BaBar
Model-independent extraction of form factors and $|V_{cb}|$ in $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ with hadronic tagging at BaBar Open
Using the entire BaBar $Υ(4S)$ data set, the first two-dimensional unbinned angular analysis of the semileptonic decay $\overline{B} \rightarrow D \ell^- \overlineν_\ell$ is performed, employing hadronic reconstruction of the tag-side $B$ …
View article: The HIBEAM Instrument at the European Spallation Source
The HIBEAM Instrument at the European Spallation Source Open
The European Spallation Source (ESS) will be the world's brightest neutron source and will open a new intensity frontier in particle physics. The HIBEAM collaboration aims to exploit the unique potential of the ESS with a dedicated ESS ins…
View article: The HighNESS Project at the European Spallation Source: Current Status and Future Perspectives
The HighNESS Project at the European Spallation Source: Current Status and Future Perspectives Open
The European Spallation Source (ESS), presently under construction in Lund, Sweden, is a multidisciplinary international laboratory that, once completed at full specifications, will operate the world's most powerful pulsed neutron source. …
View article: Benchmarking of the NCrystal SANS Plugin for Nanodiamonds
Benchmarking of the NCrystal SANS Plugin for Nanodiamonds Open
Nanodiamonds have attracted attention in recent years for their exceptional albedo of slow neutrons. Several theoretical models have been proposed to compute the total elastic cross section. However, these models neglect the relatively com…
View article: Search for heavy neutral leptons using tau lepton decays at <i>BaBaR</i>
Search for heavy neutral leptons using tau lepton decays at <i>BaBaR</i> Open
This article presents a model-independent search for an additional, mostly sterile, heavy neutral lepton (HNL), that is capable of mixing with the Standard Model τ neutrino with a mixing strength of |Uτ4|2, corresponding to the absolute sq…
View article: Design of an optimized nested-mirror neutron reflector for a NNBAR experiment
Design of an optimized nested-mirror neutron reflector for a NNBAR experiment Open
The NNBAR experiment for the European Spallation Source will search for free neutrons converting to antineutrons with an expected sensitivity improvement of three orders of magnitude compared to the last such search. This paper describes b…
View article: Search for $B$ Mesogenesis at BABAR
Search for $B$ Mesogenesis at BABAR Open
A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the universe. This scenario predicts exotic $B$ meson decays into a baryon and a dark sector anti-baryon ($ψ_D$)…
View article: Very cold and ultra cold neutron sources for ESS
Very cold and ultra cold neutron sources for ESS Open
The goal of the “Workshop on Very Cold and Ultra Cold Neutron Sources for ESS” was to discuss scientific cases, ideas and possibilities for the implementation of sources of Very Cold and Ultra Cold neutrons at the European Spallation Sourc…
View article: The HIBEAM/NNBAR Calorimeter Prototype
The HIBEAM/NNBAR Calorimeter Prototype Open
The HIBEAM/NNBAR experiment is a free-neutron search for n → sterile n and n → oscillations planned to be installed at the European Spallation Source under construction in Lund, Sweden. A key component in the experiment is the detector…
View article: The development of the NNBAR experiment
The development of the NNBAR experiment Open
The NNBAR experiment for the European Spallation Source will search for free neutrons converting to antineutrons with a sensitivity improvement of three orders of magnitude compared to the last such search. This paper describes progress to…
View article: Beamline Simulation for the NNBAR Experiment at the European Spallation Source
Beamline Simulation for the NNBAR Experiment at the European Spallation Source Open
The HIBEAM and NNBAR experiments are a proposed fundamental science experiments at the European Spallation Source, performing high precision searches for neutron conversions in several baryon number violating (BNV) channels. For simulation…
View article: Search for an Axionlike Particle in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math> Meson Decays
Search for an Axionlike Particle in Meson Decays Open
Axionlike particles (ALPs) are predicted in many extensions of the standard model, and their masses can naturally be well below the electroweak scale. In the presence of couplings to electroweak bosons, these particles could be emitted in …
View article: Status of the Design of an Annihilation Detector to Observe Neutron-Antineutron Conversions at the European Spallation Source
Status of the Design of an Annihilation Detector to Observe Neutron-Antineutron Conversions at the European Spallation Source Open
The goal of the HIBEAM/NNBAR program is to search for baryon number violation via the conversion or oscillation of neutrons into sterile neutrons and/or antineutrons at the European Spallation Source. A key experimental component of the pr…
View article: Measurements of the neutron absorption in supermirror coatings
Measurements of the neutron absorption in supermirror coatings Open
In this work we report on measurements of neutron absorption in supermirror coatings. The measurements were carried out using the SuperADAM instrument at the Institut Laue-Langevin and by measuring the gamma-ray production from m = 3 and m…
View article: A Possible Neutron-Antineutron Oscillation Experiment at PF1B at the Institut Laue Langevin
A Possible Neutron-Antineutron Oscillation Experiment at PF1B at the Institut Laue Langevin Open
We consider a possible neutron–antineutron (n−n¯) oscillation experiment at the PF1B instrument at Institut Laue Langevin. It can improve the best existing constraint on the transition rate and also allow the testing of the methods and ins…
View article: Search for Lepton Flavor Violation in $Υ(3S)\rightarrow e^{\pm}μ^{\mp}$
Search for Lepton Flavor Violation in $Υ(3S)\rightarrow e^{\pm}μ^{\mp}$ Open
We report on the first search for electron-muon lepton flavor violation (LFV) in the decay of a $b$~quark and $b$~antiquark bound state. We look for the LFV decay $Υ(3S)\rightarrow e^{\pm}μ^{\mp}$ in a sample of 118~million $Υ(3S)$ mesons …
View article: NJOY+NCrystal: an open-source tool for creating thermal neutron scattering libraries
NJOY+NCrystal: an open-source tool for creating thermal neutron scattering libraries Open
In this work we present NJOY+NCrystal, a tool to generate thermal neutron scattering libraries with support for coherent and incoherent elastic components for crystalline solid materials. This tool, which is a customized version of NJOY, w…