68 documents found, page 1 of 7
Search for new physics in low-energy electron recoils from the first LZ exposure
Aalbers, J.; Akerib, D. S.; Al Musalhi, A. K.; Alder, F.; Amarasinghe, C. S.; Ames, A.; Anderson, T. J.; Angelides, N.; Araújo, H. M.; Armstrong, J. E.The LUX-ZEPLIN (LZ) experiment is a dark matter detector centered on a dual-phase xenon time projection chamber. We report searches for new physics appearing through few-keV-scale electron recoils, using the experiment’s first exposure of 60 live days and a fiducial mass of 5.5 t. The data are found to be consistent with a background-only hypothesis, and limits are set on models for new physics including solar ...
Background determination for the LUX-ZEPLIN dark matter experiment
Brás, P.; Cabrita, R.; Lindote, A.; Lopes, M. I.; Lopez-Asamar, E.; Neves, F.; Pereira, G.; Porzio, D.; Silva, C.; Solovov, V. N.The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to 9.2 × 10−48 cm2 for the spin-independent interaction of a 36 GeV=c2 WIMP at 90% confidence level. In this paper, we present a comprehensive analysis of the backgrounds important for this result and for other upcoming physics analyses, including neutrinoless double-beta decay searches and effecti...
First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
Aalbers, J.; Akerib, D. S.; Akerlof, C. W.; Al Musalhi, A. K.; Alder, F.; Alqahtani, A.; Alsum, S. K.; Amarasinghe, C. S.; Ames, A.; Anderson, T. J.9 pages, 8 figures. See https://doi.org/10.1103/PhysRevLett.131.041002 for a data release related to this paper; The LUX-ZEPLIN experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) wit...
A next-generation liquid xenon observatory for dark matter and neutrino physics
Aalbers, J.; AbdusSalam, S. S.; Abe, K.; Aerne, V.; Agostini, F.; Ahmed Maouloud, S.; Akerib, D. S.; Akimov, D. Y.; Akshat, J.; Al Musalhi, A. K.The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon timeprojection chamber is the leading technology to cover the available parameter space for weakly interacting massive particles, while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinol...
Erratum to: The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs
Cabrita, R.; Cunha, J. P. da; Lindote, A.; Lopes, M. I.; Lopez-Asamar, E.; Neves, F.; Pal, S.; Pereira, G.; Pereira, C.; Rodrigues, J. P. Correia
First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
Aalbers, J.; Akerib, D. S.; Akerlof, C. W.; Musalhi, A. K. Al; Brás, P.; Cabrita, R.; Lindote, A.; Lopes, M. I.; Lopez Asamar, E.; Neves, F.; Pal, S.9 pages, 6 figures. See https://tinyurl.com/LZDataReleaseRun1 for a data release related to this paper; The LUX-ZEPLIN (LZ) experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LZ's first search for Weakly Interacting Massive Particles (WIMPs) with an exposur...
The MIGDAL experiment: Measuring a rare atomic process to aid the search for da...
Araújo, H. M.; Balashov, S. N.; Borg, J. E.; Brunbauer, F. M.; Cazzaniga, C.; Frost, C. D.; Garcia, F.; Kaboth, A. C.; Kastriotou, M.; Katsioulas, I.Minor corrections from journal review process; accepted version; We present the Migdal In Galactic Dark mAtter expLoration (MIGDAL) experiment aiming at the unambiguous observation and study of the so-called Migdal effect induced by fast-neutron scattering. It is hoped that this elusive atomic process can be exploited to enhance the reach of direct dark matter search experiments to lower masses, but it is still...
An Effective Field Theory Analysis of the First LUX Dark Matter Search
Akerib, D. S.; Alsum, S.; Araújo, H. M.; Bai, X.; Balajthy, J.; Baxter, A.; Bernard, E. P.; Bernstein, A.; Biesiadzinski, T. P.; Boulton, E. M.11 pages, 6 figures; The Large Underground Xenon (LUX) dark matter search was a 250-kg active mass dual-phase time projection chamber that operated by detecting light and ionization signals from particles incident on a xenon target. In December 2015, LUX reported a minimum 90% upper C.L. of 6e-46 cm^2 on the spin-independent WIMP-nucleon elastic scattering cross section based on a 1.4e4 kg*day exposure in its f...
The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs
Akerib, D. S.; Akerlof, C. W.; Akimov, D. Yu.; Alquahtani, A.; Alsum, S. K.; Anderson, T. J.; Angelides, N.; Araújo, H. M.; Arbuckle, A.LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMPnucleon scattering sensitivity above 1.4 × 10−48 cm2 for a WIMP mass of 40 GeV/c2 and a 1000 days exposure. LZ achieves this sensitivity through a combination of a large 5.6 t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. Th...
A evolução da rádio em Portugal: um estudo de caso sobre a Rádio Comercial (“Se...
Neves, F.; Espanha, R.Falar da história da Rádio Comercial, é falar da própria história do Portugal contemporâneo. A Rádio tem vindo a desempenhar um importante papel nos movimentos sociais e políticos em Portugal. E a Rádio Comercial, em particular, tem sido um exemplo desse desempenho. A estação de rádio que atualmente é líder de audiências em Portugal, é a herdeira de uma das estações mais populares de sempre: O Rádio Clube Portu...