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Showing papers by "Petr Vogel published in 2011"

Journal Article•DOI•
Observation of two-neutrino double-beta decay in 136Xe with the EXO-200 detector.

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Nicole Ackerman1, B. Aharmim2, M. Auger3, D. J. Auty4, P. S. Barbeau1, K. Barry1, L. Bartoszek1, E. Beauchamp2, V. Belov, C. Benitez-Medina5, Martin Breidenbach1, A. Burenkov, B. T. Cleveland2, R. Conley1, E. Conti1, J. Cook6, S. Cook5, A. Coppens7, I. Counts1, W. W. Craddock1, T. Daniels6, M. Danilov, C. G. Davis8, J. Davis1, R. DeVoe1, Z. Djurcic9, Z. Djurcic4, A. Dobi8, A. Dolgolenko, M. J. Dolinski1, K. Donato2, Monica Dunford7, W. M. Fairbank5, J. Farine2, Peter Fierlinger10, D. Franco3, D. R. Freytag1, G. Giroux3, R. Gornea3, K. Graham7, Giorgio Gratta1, M. P. Green1, C. Hagemann7, C. R. Hall8, K. Hall5, G. Haller1, C. K. Hargrove7, R. Herbst1, S. Herrin1, J. Hodgson1, M. Hughes4, A. S. Johnson1, A. Karelin, L. J. Kaufman11, Thomas Koffas1, Thomas Koffas7, A. Kuchenkov, Amit Kumar1, K. S. Kumar6, David Leonard12, F. Leonard7, F. LePort1, D. Mackay1, R. MacLellan4, Michael G. Marino10, Y. Martin13, Y. Martin3, B. Mong5, M. Montero Díez1, P. Morgan6, A. R. Müller1, R. Neilson1, R. Nelson, A.C. Odian1, K. O'Sullivan1, C. Ouellet7, A. Piepke4, A. Pocar6, C. Y. Prescott1, K. Pushkin4, A Rivas1, E. Rollin7, P. C. Rowson1, J. J. Russell1, A. Sabourov1, David A. Sinclair14, David A. Sinclair7, K. Skarpaas1, S. Slutsky8, V.N. Stekhanov, V. Strickland7, V. Strickland14, M. Swift1, D. Tosi1, K. Twelker1, Petr Vogel15, J.-L. Vuilleumier3, J. M. Vuilleumier3, A. P. Waite1, S. Waldman16, S. Waldman1, T. Walton5, K. Wamba1, Marc Weber3, U. Wichoski2, J. Wodin1, J. D. Wright6, Liang Yang, Y.-R. Yen8, O. Ya. Zeldovich •
Stanford University1, Laurentian University2, University of Bern3, University of Alabama4, Colorado State University5, University of Massachusetts Amherst6, Carleton University7, University of Maryland, College Park8, Argonne National Laboratory9, Technische Universität München10, Indiana University11, Seoul National University12, École Normale Supérieure13, TRIUMF14, California Institute of Technology15, Massachusetts Institute of Technology16
17 Nov 2011-Physical Review Letters
TL;DR: The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.
Abstract: We report the observation of two-neutrino double-beta decay in ^(136)Xe with T_(1/2)=2.11±0.04(stat)±0.21(syst)×10^(21) yr. This second-order process, predicted by the standard model, has been observed for several nuclei but not for ^(136)Xe. The observed decay rate provides new input to matrix element calculations and to the search for the more interesting neutrinoless double-beta decay, the most sensitive probe for the existence of Majorana particles and the measurement of the neutrino mass scale.

177 citations

Journal Article•DOI•
Relation between the 0νββ and 2νββ nuclear matrix elements reexamined

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Fedor Šimkovic1, Rastislav Hodak, Amand Faessler2, Petr Vogel3•
Comenius University in Bratislava1, University of Tübingen2, California Institute of Technology3
21 Jan 2011-Physical Review C
TL;DR: In this article, the dominant Gamow-Teller part of the nuclear matrix element governing the neutrinoless ββ decay is related to the matrix element M^(2ν)_(cl) governing the allowed two-neutrino β β decay.
Abstract: We show that the dominant Gamow-Teller part, M^(0ν)_(GT), of the nuclear matrix element governing the neutrinoless ββ decay is related to the matrix element M^(2ν)_(cl) governing the allowed two-neutrino ββ decay. That relation is revealed when these matrix elements are expressed as functions of the relative distance r between the pair of neutrons that are transformed into a pair of protons in the ββ decay. Analyzing this relation allows us to understand the contrasting behavior of these matrix elements when A and Z is changed; while M^(0ν)_(GT) changes slowly and smoothly, M^(2ν) has pronounced shell effects. We also discuss the possibility of phenomenological determination of the M^(2ν)_(cl) and from them of the M^(0ν)_(GT)values from the experimental study of the β^± strength functions.

38 citations

Journal Article•DOI•
Double Beta Decay

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Steven Elliott1, Petr Vogel2•
Los Alamos National Laboratory1, California Institute of Technology2
27 Oct 2011-arXiv: High Energy Physics - Phenomenology
TL;DR: In this article, the effects of uncertainties in already measured neutrino parameters and in calculated nuclear matrix elements on the interpretation of upcoming double-beta decay measurements are examined, focusing on the three light neutrinos in future experiments.
Abstract: We review recent developments in double-beta decay, focusing on what can be learned about the three light neutrinos in future experiments. We examine the effects of uncertainties in already measured neutrino parameters and in calculated nuclear matrix elements on the interpretation of upcoming double-beta decay measurements. We then review a number of proposed experiments.

20 citations