Results 1 to 10 of about 2,737,113 (83)

Measurement of sound speed vs. depth in South Pole ice for neutrino astronomy [PDF]

Astropart.Phys.33:277-286,2010, 2009
We have measured the speed of both pressure waves and shear waves as a function of depth between 80 and 500 m depth in South Pole ice with better than 1% precision. The measurements were made using the South Pole Acoustic Test Setup ({SPATS}), an array of transmitters and sensors deployed in the ice at South Pole Station in order to measure the ...
Rasha Abbasi, Y. Abdou, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, K. Andeen, J. Auffenberg, X. Bai, M. D. Baker, S. W. Barwick, R. Bay, J. L. Bazo Alba, K. Beattie, J. J. Beatty, S. Bechet, J.K. Becker, K. H. Becker, M. L. Benabderrahmane, Jens Berdermann, P. Berghaus, D. Berley, E. Bernardini, D. Bertrand, D. Z. Besson, M. Bissok, E. Blaufuss, D. J. Boersma, C. Böhm, J. Bolmont, S. Böser, O. Botner, Larry Bradley, J. Braun, D. Breder, T. Castermans, D. Chirkin, B. Christy, J. Clem, S. Cohen, Doug Cowen, M. V. D’Agostino, M. Danninger, C. T. Day, C. De Clercq, L. Demirörs, O. Depaepe, F. Descamps, P. Desiati, G. de Vries-Uiterweerd, T. DeYoung, J. C. Díaz–Vélez, J. Dreyer, J. P. Dumm, M. R. Duvoort, W. R. Edwards, R. Ehrlich, J. Eisch, R. W. Ellsworth, O. Engdegård, S. Euler, P.A. Evenson, O. Fadiran, A. R. Fazely, T. Feusels, K. Filimonov, C. Finley, M. M. Foerster, B. D. Fox, A. Franckowiak, Robert Franke, T.K. Gaisser, J. S. Gallagher, R. Ganugapati, L. Gerhardt, L. Gladstone, A. Goldschmidt, J. A. Goodman, R. Gozzini, D. Grant, T. Griesel, A. Groß, S. Grullon, R. M. Gunasingha, M. Gurtner, C. Ha, A. Hallgren, F. Halzen, Ke Han, K. Hanson, Y. Hasegawa, J. Heise, K. Helbing, P. Herquet, S. Hickford, G. C. Hill, K.D. Hoffman, K. Hoshina, Daan Hubert, W. Huelsnitz   +99 more
arxiv   +4 more sources

Measurement of CNGS muon neutrino speed with Borexino [PDF]

, 2012
We have measured the speed of muon neutrinos with the Borexino detector using short-bunch CNGS beams. The final result for the difference in time-of-flight between a =17 GeV muon neutrino and a particle moving at the speed of light in vacuum is {\delta}t = 0.8 \pm 0.7stat \pm 2.9sys ns, well consistent with zero.
P. Alvarez Sanchez, Riccardo Barzaghi, G. Bellini, J. Benziger, B. Betti, L. Biagi, D. Bick, G. Bonfini, D. Bravo, M. Buizza Avanzini, B. Caccianiga, L. Cadonati, C. Carraro, P. Cavalcante, Giancarlo Cerretto, Á. Chavarría, D. D’Angelo, S. Davini, Carlo Iapige De Gaetani, A. Derbin, A. Etenko, H. Esteban, K. Fomenko, D. Franco, C. Galbiati, S. Gazzana, C. Ghiano, M. Giammarchi, M. Göger‐Neff, A. Goretti, L. Grandi, E. Guardincerri, S. Hardy, Aldo Ianni, Andrea Ianni, M. Jones, A. Kayunov, V. Kobychev, D. Korablëv, G. Korga, Y. Koshio, D. Kryn, M. Laubenstein, T. Lewke, E. Litvinovich, B. Loer, P. Lombardi, F. Lombardi, L. Ludhová, I. Machulin, S. Manecki, W. Maneschg, G. Manuzio, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, D. Missiaen, D. Montanari, P. Mosteiro, V. Muratova, L. Oberauer, M. Obolensky, F. Ortica, K. Otis, M. Pallavicini, L. Papp, D. Passoni, L. Pinto, L. Perasso, S. Perasso, V. Pettiti, C. Plantard, A. Pocar, R. S. Raghavan, G. Ranucci, A. Razeto, A. Re, A. Romani, N. Rossi, A. Sabelnikov, R. Saldanha, C. Salvo, S. Schönert, J. Serrano, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, P.F. Spinnato, S. Sukhotin, Y. Suvorov, R. Tartaglia, G. Testera, D. Vignaud, M. G. Visconti, R. B. Vogelaar, F. von Feilitzsch, J. Winter, M. Wójcik   +99 more
arxiv   +3 more sources

Neutrino interactions in the late universe

Journal of High Energy Physics, 2021
The cosmic neutrino background is both a dramatic prediction of the hot Big Bang and a compelling target for current and future observations. The impact of relativistic neutrinos in the early universe has been observed at high significance in a number of
Daniel Green, David E. Kaplan, Surjeet Rajendran   +2 more
doaj   +1 more source

Description of execution time dynamics for a set of concurrent real-time tasks

Revista Facultad de Ingeniería Universidad de Antioquia, 2012
A Real-time System (RTS) implemented in a digital computer interacts with the physical world through knowledge variables (sensors, actuators, Analogical - Digital, and Digital-Analogical convertors) processing its requirements through real-time tasks ...
Pedro Guevara López, José de Jesús Medel Juárez, Gustavo Delgado Reyes   +2 more
doaj   +1 more source

Luminescence of water or ice as a new detection method for magnetic monopoles

EPJ Web of Conferences, 2017
Cosmic ray detectors use air as a radiator for luminescence. In water and ice, Cherenkov light is the dominant light producing mechanism when the particle’s velocity exceeds the Cherenkov threshold, approximately three quarters of the speed of light in ...
Pollmann Anna Obertacke
doaj   +1 more source

Cosmic neutrinos: dispersive and non-linear [PDF]

Phys. Rev. D 95, 063535 (2017), 2016
We present a description of cosmic neutrinos as a dispersive fluid. In this approach, the neutrino phase space is reduced to density and velocity fields alongside a scale-dependent sound speed. This sound speed depends on redshift, the initial neutrino phase space density and the cold dark matter gravitational potential.
arxiv   +1 more source

Speed-up of neutrino transformations in a supernova environment [PDF]

Phys.Rev. D72 (2005) 045003, 2005
When the neutral current neutrino-neutrino interaction is treated completely, rather than as an interaction among angle-averaged distributions, or as a set of flavor-diagonal effective potentials, the result can be flavor mixing at a speed orders of magnitude faster than that one would anticipate from the measured neutrino oscillation parameters. It is
arxiv   +1 more source

Consequences of Neutrino Lorentz Violation For Leptonic Meson Decays [PDF]

Phys. Rev. D 84, 091902(R) (2011), 2011
If the observation by OPERA of apparently superluminal neutrinos is correct, the Lagrangian for second-generation leptons must break Lorentz invariance. We calculate the effects of an energy-independent change in the neutrino speed on another observable, the charged pion decay rate.
arxiv   +1 more source

Measurement of sound speed versus depth in Antarctic ice with the South Pole Acoustic Test Setup [PDF]

Nucl.Instrum.Meth.Suppl.A604:175-178,2009, 2008
The feasibility and design of an acoustic neutrino detection array in the South Pole ice depend on the acoustic properties of the ice. The South Pole Acoustic Test Setup (SPATS) was built to evaluate the acoustic characteristics of the ice in the 1 to 100kHz frequency range.
arxiv   +1 more source

Probing WIMP particle physics and astrophysics with direct detection and neutrino telescope data [PDF]

Phys. Rev. D 91, 103533 (2015), 2014
With positive signals from multiple direct detection experiments it will, in principle, be possible to measure the mass and cross sections of weakly-interacting massive particle (WIMP) dark matter. Recent work has shown that, with a polynomial parameterisation of the WIMP speed distribution, it is possible to make an unbiased measurement of the WIMP ...
arxiv   +1 more source