Negative / Null Result ReportOpen accessPhysics and Astronomy
C. Abel, N. J. Ayres, G. Ban et al. · 2017 · Physical Review X
We report on a search for ultralow-mass axionlike dark matter by analyzing the ratio of the spinprecession frequencies of stored ultracold neutrons and 199 Hg atoms for an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. No signal consistent with dark matter is observed for the axion mass range 10 -24 m a 10 -17 eV. Our null result sets the first laboratory constraints on the coupling of axion dark matter to gluons, which improve on astrophysical limits by up to 3 orders of magnitude, and also improves on previous laboratory constraints
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Yuichiro Ando, Takahiro Hamasaki, Takayuki Kurokawa et al. · 2014 · Nano Letters
We detected the spin polarization due to charge flow in the spin nondegenerate surface state of a three-dimensional topological insulator by means of an all-electrical method. The charge current in the bulk-insulating topological insulator…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
R. Cotesta, G. Carullo, Emanuele Berti et al. · 2022 · Physical Review Letters
We analyze GW150914 postmerger data to understand if ringdown overtone detection claims are robust. We find no evidence in favor of an overtone in the data after the waveform peak. Around the peak, the Bayes factor does not indicate the…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Y. W. Wu, M. Sato, M. J. Reid et al. · 2014 · Astronomy and Astrophysics
We report measurements of parallaxes and proper motions of ten high-mass star-forming regions in the Sagittarius spiral arm of the Milky Way as part of the BeSSeL Survey with the VLBA. Combining these results with eight others from the…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Ladan Arissian, Christopher Smeenk, F. Turner et al. · 2010 · Physical Review Letters
Tunneling is often used to describe multiphoton ionization of rare gas atoms in infrared fields. We test the tunneling approximation and its nonadiabatic extension by measuring the unperturbed momentum distribution along the κ direction of…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
B. P. Abbott, R. Abbott, T. D. Abbott et al. · 2019 · Physical review. D/Physical review. D.
We present results of an all-sky search for continuous gravitational waves (CWs), which can be produced by fast-spinning neutron stars with an asymmetry around their rotation axis, using data from the second observing run of the Advanced…
View details →Failed Experiment ReportOpen accessPhysics and Astronomy
Eric M Kenney, Brenden R Ortiz, Chennan Wang et al. · 2021 · Journal of Physics Condensed Matter
Abstract We have carried out muon spin relaxation and rotation measurements on the newly discovered kagome metal KV 3 Sb 5 , and find a local field dominated by weak magnetic disorder which we associate with the nuclear moments present,…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
D. Rubin, G. Aldering, M. Betoule et al. · 2025 · The Astrophysical Journal
Abstract Type Ia supernovae (SNe Ia) were instrumental in establishing the acceleration of the Universe’s expansion. By virtue of their combination of distance reach, precision, and prevalence, they continue to provide key cosmological constraints, complementing other cosmological probes. Individual SN surveys cover only over about a factor of 2 in redshift, so compilations of multiple SN data sets are strongly beneficial. We assemble an up-to-date “Union” compilation of 2087 cosmologically useful SNe Ia from 24 data sets (“Union3”). We take care to put all SNe on the same distance scale and u
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
J. Abadie, B. P. Abbott, R. Abbott et al. · 2012 · The Astrophysical Journal
We present the results of a search for gravitational waves associated with 154 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments in 2009-2010, during the sixth LIGO science run and the second and third…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
A. Anastasi, D. Babusci, G. Bencivenni et al. · 2016 · Physics Letters B
The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in e + e - U, U + -based on 28 million e + e - + - events collected at DA NE by the KLOE experiment. The + -production by initial-state radiation compensates for a loss of sensitivity of previous KLOE U e + e -, + -searches due to the small branching ratios in the - resonance region. We found no evidence for a signal and set a limit at 90% CL on the mixing strength between the photon and the
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Asher Berlin · 2016 · Physical Review Letters
We consider a class of models involving interactions between ultralight scalar dark matter and standard model neutrinos. Such couplings modify the neutrino mass splittings and mixing angles to include additional components that vary in…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Patrick L. Kelly, Ori D. Fox, Alexei V. Filippenko et al. · 2014 · The Astrophysical Journal
We constrain the properties of the progenitor system of the highly reddened Type Ia supernova (SN Ia) 2014J in Messier 82 (M82; d ≈ 3.5 Mpc). We determine the supernova (SN) location using Keck-II K-band adaptive optics images, and we find…
View details →Replication FailureOpen accessPhysics and Astronomy
R. Abbott, H. Abe, F. Acernese et al. · 2025 · Physical review. D/Physical review. D.
The ever-increasing number of detections of gravitational waves from compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever-more sensitive tests of general relativity (GR) in the dynamical and…
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Antoine Boutet, Hyoungshick Kim, Eiko Yoneki · 2021 · Proceedings of the International AAAI Conference on Web and Social Media
Nowadays, the use of social media such as Twitter is necessary to monitor trends of people on political issues. As a case study, we collected the main stream of Twitter related to the 2010 UK general election during the associated period.…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
L. Easy, F. Militello, John Omotani et al. · 2014 · Physics of Plasmas
This paper presents simulations of isolated 3D filaments in a slab geometry obtained using a newly developed 3D reduced fluid code, written using the BOUT++ framework. First, systematic scans were performed to investigate how the dynamics…
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C. Schaefer, Mario Geiger, T. Kuntzer et al. · 2017 · Astronomy and Astrophysics
Context. Future large-scale surveys with high-resolution imaging will provide us with approximately 10 5 new strong galaxy-scale lenses. These strong-lensing systems will be contained in large data amounts, however, which are beyond the…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
J. Suzuki, Tomoki Horie, Yoshiyuki Inoue et al. · 2015 · Journal of Cosmology and Astroparticle Physics
A search for hidden photon cold dark matter (HP CDM) using a new technique with a dish antenna is reported. From the result of the measurement, we found no evidence for the existence of HP CDM and set an upper limit on the photon-HP mixing parameter $\chi$ of $\sim 6\times 10^{-12}$ for the hidden photon mass $m_\gamma = 3.1 \pm 1.2$ eV.
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Ben Yelverton, Grant M. Kennedy, K. Y. L. Su et al. · 2019 · Monthly Notices of the Royal Astronomical Society
Abstract We compile a sample of 341 binary and multiple star systems with the aim of searching for and characterizing Kuiper belt-like debris discs. The sample is assembled by combining several smaller samples studied in previously…
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Michael W. Topping, Dan Stark, Peter Senchyna et al. · 2025 · The Astrophysical Journal
Abstract JWST has recently discovered a subset of reionization era galaxies with ionized gas that is metal-poor in oxygen and carbon but heavily enriched in nitrogen. This abundance pattern is almost never seen in lower-redshift galaxies but is commonly observed in globular cluster stars. We have recently demonstrated that this peculiar abundance pattern appears in a compact (≃20 pc) metal-poor galaxy undergoing a strong burst of star formation. This galaxy was originally selected based on strong C iv emission, indicating a hard radiation field rarely seen locally. In this paper, we present JW
View details →Failed Experiment ReportPhysics and Astronomy
V. K. Dixit, S. Porwal, S. D. Singh et al. · 2014 · Journal of Physics D Applied Physics
Temperature dependence of the photoluminescence (PL) peak energy of bulk and quantum well (QW) structures is studied by using a new phenomenological model for including the effect of localized states. In general an anomalous S-shaped…
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Sheehan H. Ahmed, Alyson Brooks, Charlotte Christensen · 2016 · Monthly Notices of the Royal Astronomical Society
We investigate whether the inclusion of baryonic physics influences the formation of thin, coherently rotating planes of satellites such as those seen around the Milky Way and Andromeda. For four Milky Way-mass simulations, each run both…
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Chunyan Wang, Bernardo A. Huberman · 2012 · Scientific Reports
The massive amounts of data that social media generates has facilitated the study of online human behavior on a scale unimaginable a few years ago. At the same time, the much discussed apparent randomness with which people interact online…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
K. Masuda, Joshua N. Winn · 2017 · The Astronomical Journal
Abstract We revisit the null result of the Hubble Space Telescope search for transiting planets in the globular cluster 47 Tucanae, in the light of improved knowledge of planet occurrence from the Kepler mission. Gilliland and co-workers…
View details →Negative / Null Result ReportPhysics and Astronomy
A. Malagoli, Fumitake Kametani, Jianyi Jiang et al. · 2011 · Superconductor Science and Technology
It is well known that the critical current density Jc of multifilamentary Bi-2212 wires tends to decline as the wire length increases, but the reasons for and the magnitude of this decline remain obscure and quantitatively unpredictable.…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Matthew S. Clement, Nathan A. Kaib, John E. Chambers · 2019 · The Astronomical Journal
Abstract Of the solar system’s four terrestrial planets, the origin of Mercury is perhaps the most mysterious. Modern numerical simulations designed to model the dynamics of terrestrial planet formation systematically fail to replicate…
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Sukanta Deb, Harinder P. Singh, Subhash Kumar et al. · 2015 · Monthly Notices of the Royal Astronomical Society
We present a study of three-dimensional structure of the Small Magellanic Cloud (SMC). The V- and I-band light curves of the fundamental mode RR Lyrae (RRab) stars obtained by the Optical Gravitational Lensing Experiment-III project were…
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Zhi-zhong Xing, Zhen-hua Zhao, Ye-Ling Zhou · 2015 · The European Physical Journal C
The Majorana nature of massive neutrinos will be crucially probed in the next-generation experiments of the neutrinoless double-beta ( $$0\nu 2\beta $$ ) decay. The effective mass term of this process, $$\langle m\rangle _{ee}$$ , may be contaminated by new physics. So how to interpret a discovery or null result of the $$0\nu 2\beta $$ decay in the foreseeable future is highly nontrivial. In this paper we introduce a novel three-dimensional description of $$|\langle m\rangle _{ee}|$$ , which allows us to see its sensitivity to the lightest neutrino mass and two Majorana phases in a transparent
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
Wei Hu · 2013 · Social Networking
Various networks exist in the world today including biological, social, information, and communication networks with the Internet as the largest network of all. One salient structural feature of these networks is the formation of groups or communities of vertices that tend to be more connected to each other within the same group than to those outside. Therefore, the detection of these communities is a topic of great interest and importance in many applications and different algorithms including label propagation have been developed for such purpose. Speaker-listener label propagation algorithm
View details →Negative / Null Result ReportOpen accessPhysics and Astronomy
M. Bernert, T.O.S.J. Bosman, T. Lunt et al. · 2025 · Nuclear Materials and Energy
Power exhaust is a crucial issue for future fusion reactors. Divertor detachment and the required power dissipation fractions of about 95% are foreseen to be achieved by impurity seeding. In a tokamak, at high seeding levels the radiation often concentrates in a small region inside the confined plasma near the X-point. In early observations the so-called X-point radiator (XPR) often led to back-transitions to L-mode or disruptions. In metal tokamaks or with higher available heating power, these regimes can be stabilized and are now established on AUG, JET, TCV, KSTAR and WEST. The XPR is a col
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Joop Schaye, Evgenii Chaikin, Matthieu Schaller et al. · 2026 · Monthly Notices of the Royal Astronomical Society
ABSTRACT We present the COLIBRE galaxy formation model and the COLIBRE suite of cosmological hydrodynamical simulations. COLIBRE includes new models for radiative cooling, dust grains, star formation, stellar mass loss, turbulent diffusion, pre-supernova stellar feedback, supernova feedback, supermassive black holes, and active galactic nucleus (AGN) feedback. The multiphase interstellar medium is explicitly modelled without a pressure floor. Hydrogen and helium are tracked in non-equilibrium, with their contributions to the free electron density included in metal-line cooling calculations. Th
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