Search

Your search keyword '"V. Velan"' showing total 3 results
Start Over Author "V. Velan" Publisher escholarship, university of california
3 results on '"V. Velan"'

1. Constraints on effective field theory couplings using 311.2 days of LUX data

Author

A. St. J. Murphy, Adam Bernstein, T. P. Biesiadzinski, M.I. Lopes, Jilei Xu, C. Nehrkorn, S. Alsum, M. Horn, P. A. Terman, A. Fan, J. T. White, P. Rossiter, Sergey Burdin, A. Baxter, S. J. Haselschwardt, R. Taylor, T. J. Whitis, A. Manalaysay, D. Byram, Antonin Vacheret, B. G. Lenardo, Q. Riffard, N. Swanson, P. Brás, K. T. Lesko, V. Velan, Ethan Bernard, A. Nilima, Matthew Szydagis, T. J. Sumner, S. Shaw, R. G. Jacobsen, K. Palladino, P. Sorensen, D. Khaitan, R. C. Webb, L. de Viveiros, J. A. Morad, M. Solmaz, B. P. Tennyson, O. Jahangir, U. Utku, W. C. Taylor, X. Bai, K. Kazkaz, E. Leason, J. Bang, H. N. Nelson, Henrique Araujo, W. Ji, L. Tvrznikova, V. A. Kudryavtsev, F. Neves, D. R. Tiedt, J. Balajthy, B. Boxer, C. M. Ignarra, A. Lindote, R. L. Mannino, S. A. Hertel, S. Fiorucci, Carl Gwilliam, T. A. Shutt, W. H. To, D. S. Akerib, E. Druszkiewicz, V. N. Solovov, C. R. Hall, K. C. Oliver-Mallory, D. Woodward, D. J. Taylor, Chao Zhang, D. P. Hogan, M. C. Carmona-Benitez, M. G. D. Gilchriese, C. Rhyne, N. Marangou, Elena Korolkova, J. Liao, G. R. C. Rischbieter, R. J. Gaitskell, Dongming Mei, F. L. H. Wolfs, E. M. Boulton, K. Kamdin, X. Xiang, J. Lin, Daniel McKinsey, A. Naylor, J. E. Cutter, D. Q. Huang, C. Ghag, Michael S. Witherell, Catarina Silva, C. Chan, A. Vaitkus, S. Kravitz, and Science and Technology Facilities Council (STFC)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), SPECTROSCOPIC SURVEY, Nuclear Theory, FOS: Physical sciences, Astronomy & Astrophysics, Atomic, 7. Clean energy, 01 natural sciences, Physics, Particles & Fields, Particle and Plasma Physics, 0103 physical sciences, Effective field theory, DARK-MATTER, Order (group theory), Nuclear, 010306 general physics, Mathematical physics, Physics, Quantum Physics, Science & Technology, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Molecular, Nuclear & Particles Physics, Physical Sciences, astro-ph.CO, Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report here the results of an Effective Field Theory (EFT) WIMP search analysis using LUX data. We build upon previous LUX analyses by extending the search window to include nuclear recoil energies up to $\sim$180 keV$_{nr}$, requiring a reassessment of data quality cuts and background models. In order to use a binned Profile Likelihood statistical framework, the development of new analysis techniques to account for higher-energy backgrounds was required. With a 3.14$\times10^4$ kg$\cdot$day exposure using data collected between 2014 and 2016, we set 90\% C.L. exclusion limits on non-relativistic EFT WIMP couplings to neutrons and protons, providing the most stringent constraints on a significant fraction of the possible EFT WIMP interactions. Additionally, we report world-leading exclusion limits on inelastic EFT WIMP-nucleon recoils., 19 Pages, 10 Figures, 4 Table

Published
2021

2. Discrimination of electronic recoils from nuclear recoils in two-phase xenon time projection chambers

Author

F. L. H. Wolfs, E. M. Boulton, T. A. Shutt, Ethan Bernard, P. Brás, Kareem Kazkaz, T. P. Biesiadzinski, J. T. White, Henrique Araujo, L. Tvrznikova, C. R. Hall, S. Uvarov, X. Bai, E. Druszkiewicz, M. Horn, M. G. D. Gilchriese, Carl Gwilliam, D. J. Taylor, Daniel McKinsey, E. Leason, Q. Riffard, V. A. Kudryavtsev, C. M. Ignarra, Catarina Silva, S. Alsum, A. Naylor, Robert A. Taylor, P. Rossiter, M. Moongweluwan, C. Chan, Chao Zhang, S. Kravitz, D. Q. Huang, T. J. Whitis, Elena Korolkova, B. G. Lenardo, J. A. Morad, G. R. C. Rischbieter, T. J. Sumner, K. T. Lesko, N. Marangou, S. Shaw, M. Solmaz, M. S. Witherell, O. Jahangir, P. A. Terman, Dongming Mei, D. R. Tiedt, Antonin Vacheret, D. S. Akerib, J. Lin, P. Sorensen, V. Velan, J. E. Cutter, A. St. J. Murphy, F. Neves, Adam Bernstein, B. P. Tennyson, D. Khaitan, M.I. Lopes, C. Ghag, K. C. Oliver-Mallory, J. Liao, D. P. Hogan, A. Fan, K. J. Palladino, C. Rhyne, R. J. Gaitskell, E. K. Pease, V. N. Solovov, R. C. Webb, L. de Viveiros, R. L. Mannino, S. Fiorucci, W. H. To, D. Woodward, W. C. Taylor, J. Balajthy, Jilei Xu, C. Nehrkorn, U. Utku, D. Byram, B. Boxer, Matthew Szydagis, S. A. Hertel, Sergey Burdin, A. Baxter, A. Manalaysay, A. Lindote, M. C. Carmona-Benitez, K. Kamdin, S. J. Haselschwardt, H. N. Nelson, R. G. Jacobsen, W. Ji, A. Nilima, and Science and Technology Facilities Council (STFC)

Subjects
Photon, Large Underground Xenon experiment, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Massive particle, FOS: Physical sciences, chemistry.chemical_element, Astronomy & Astrophysics, nucl-ex, 01 natural sciences, Atomic, Physics, Particles & Fields, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, Xenon, Particle and Plasma Physics, Electric field, 0103 physical sciences, Nuclear, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, physics.ins-det, Physics, Quantum Physics, Science & Technology, 010308 nuclear & particles physics, hep-ex, Drift field, Molecular, Instrumentation and Detectors (physics.ins-det), Recoil energy, Nuclear & Particles Physics, chemistry, Physical Sciences, Astronomical and Space Sciences
Abstract

We present a comprehensive analysis of electronic recoil vs. nuclear recoil discrimination in liquid/gas xenon time projection chambers, using calibration data from the 2013 and 2014-16 runs of the Large Underground Xenon (LUX) experiment. We observe strong charge-to-light discrimination enhancement with increased event energy. For events with S1 = 120 detected photons, i.e. equivalent to a nuclear recoil energy of $\sim$100 keV, we observe an electronic recoil background acceptance of $, 29 pages, 33 figures; minor typos corrected, references updated

Published
2020

3. Search for annual and diurnal rate modulations in the LUX experiment

Author

T. J. Sumner, A. St. J. Murphy, Adam Bernstein, S. Uvarov, M.I. Lopes, R. Knoche, D. S. Akerib, T. A. Shutt, J. A. Morad, A. Manalaysay, H. N. Nelson, Ethan Bernard, J. Liao, V. Velan, W. H. To, U. Utku, A. Lindote, M. Horn, M. F. Marzioni, D. Woodward, R. L. Mannino, T. J. R. Davison, Mani Tripathi, P. Rossiter, S. J. Haselschwardt, Sergey Burdin, W. C. Taylor, D. Q. Huang, K. T. Lesko, Matthew Szydagis, T. J. Whitis, E. M. Boulton, X. Bai, K. Kazkaz, R. C. Webb, J. Balajthy, J. Genovesi, Jilei Xu, B. G. Lenardo, D. J. Taylor, C. Nehrkorn, J. Lin, F.L.H. Wolfs, M. Solmaz, F. Neves, S. Shaw, J.R. Verbus, D. Byram, S. Fiorucci, C. Ghag, M. C. Carmona-Benitez, Chao Zhang, K. Kamdin, P. Beltrame, P. A. Terman, S. Alsum, M. Moongweluwan, B. Boxer, J. T. White, M. G. D. Gilchriese, T. P. Biesiadzinski, J. E. Cutter, P. Sorensen, C. Rhyne, R. J. Gaitskell, B. P. Tennyson, L. Tvrznikova, Carl Gwilliam, Elena Korolkova, G. R. C. Rischbieter, Henrique Araujo, C. R. Hall, Daniel McKinsey, D. Khaitan, S. R. Fallon, N. Marangou, Dongming Mei, A. Fan, P. Brás, S. A. Hertel, K. J. Palladino, E. Druszkiewicz, C. Chan, S. Kravitz, K. Yazdani, D. P. Hogan, E. K. Pease, Michael S. Witherell, C. Silva, V. N. Solovov, K. C. Oliver-Mallory, R. G. Jacobsen, W. Ji, V. A. Kudryavtsev, D. R. Tiedt, C. M. Ignarra, Science and Technology Facilities Council (STFC), and The Royal Society

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, Rate modulation, Dark matter, FOS: Physical sciences, Astrophysics, Astronomy & Astrophysics, 01 natural sciences, Atomic, High Energy Physics - Experiment, Physics, Particles & Fields, High Energy Physics - Experiment (hep-ex), Recoil, Particle and Plasma Physics, 0103 physical sciences, Modulation (music), DARK-MATTER, Nuclear, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), physics.ins-det, Physics, Quantum Physics, Science & Technology, 010308 nuclear & particles physics, hep-ex, Molecular, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Amplitude, Physical Sciences, astro-ph.CO, Halo, Astrophysics - Instrumentation and Methods for Astrophysics, Tonne, Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics, astro-ph.IM
Abstract

Various dark matter models predict annual and diurnal modulations of dark matter interaction rates in Earth-based experiments as a result of the Earth's motion in the halo. Observation of such features can provide generic evidence for detection of dark matter interactions. This paper reports a search for both annual and diurnal rate modulations in the LUX dark matter experiment using over 20 calendar months of data acquired between 2013 and 2016. This search focuses on electron recoil events at low energies, where leptophilic dark matter interactions are expected to occur and where the DAMA experiment has observed a strong rate modulation for over two decades. By using the innermost volume of the LUX detector and developing robust cuts and corrections, we obtained a stable event rate of 2.3$\pm$0.2~cpd/keV$_{\text{ee}}$/tonne, which is among the lowest in all dark matter experiments. No statistically significant annual modulation was observed in energy windows up to 26~keV$_{\text{ee}}$. Between 2 and 6~keV$_{\text{ee}}$, this analysis demonstrates the most sensitive annual modulation search up to date, with 9.2$\sigma$ tension with the DAMA/LIBRA result. We also report no observation of diurnal modulations above 0.2~cpd/keV$_{\text{ee}}$/tonne amplitude between 2 and 6~keV$_{\text{ee}}$., Comment: 12 pages, 9 figures

Published
2018

Catalog

Books, media, physical & digital resources
See catalog results