Charles Y. Prescott

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We report on a search for neutrinoless double-beta decay of 136Xe with EXO-200. No signal is observed for an exposure of 32.5 kg yr, with a background of ∼1.5×10(-3)  kg(-1) yr(-1)  keV(-1) in the ±1σ region of interest. This sets a lower limit on the half-life of the neutrinoless double-beta decay T(1/2)(0νββ)(136Xe)>1.6×10(25)  yr (90% C.L.),(More)
We report a new measurement of the Cabibbo-Kobayashi-Maskawa parameter Vub made with a sample of 9.7 x 10(6) BB- events collected with the CLEO II detector. Using heavy quark theory, we combine the observed yield of leptons from semileptonic B decay in the end-point momentum interval 2.2-2.6 GeV/c with recent CLEO II data on B-->X(s)gamma to find Vub =(More)
Many extensions of the standard model of particle physics suggest that neutrinos should be Majorana-type fermions-that is, that neutrinos are their own anti-particles-but this assumption is difficult to confirm. Observation of neutrinoless double-β decay (0νββ), a spontaneous transition that may occur in several candidate nuclei, would verify the Majorana(More)
Parity violation has been well established in particle physics for many years, since the 1950's where it was. first seen in beta decay processes. The strong and electromagnetic forces are parity conserving, and the experimental evidence that parity was not conserved in weak processes came somewhat as a surprise. The weak forces are responsible for the decay(More)
J. B. Albert,1 M. Auger,2 D. J. Auty,3 P. S. Barbeau,4 E. Beauchamp,5 D. Beck,6 V. Belov,7 C. Benitez-Medina,8 J. Bonatt,9,4 M. Breidenbach,10 T. Brunner,4 A. Burenkov,7 G. F. Cao,11 C. Chambers,8 J. Chaves,4 B. Cleveland,5,* S. Cook,8 A. Craycraft,8 T. Daniels,9 M. Danilov,7 S. J. Daugherty,1 C. G. Davis,12 J. Davis,4 R. DeVoe,4 S. Delaquis,2 A. Dobi,12 A.(More)
N. Ackerman,* B. Aharmim, M. Auger, D. J. Auty, P. S. Barbeau, K. Barry, L. Bartoszek, E. Beauchamp, V. Belov, C. Benitez-Medina, M. Breidenbach, A. Burenkov, B. Cleveland, R. Conley, E. Conti, J. Cook, S. Cook, A. Coppens, I. Counts, W. Craddock, T. Daniels, M.V. Danilov, C. G. Davis, J. Davis, R. deVoe, Z. Djurcic, A. Dobi, A.G. Dolgolenko, M. J.(More)
J.B. Albert, M. Auger, D.J. Auty, P.S. Barbeau, E. Beauchamp, D. Beck, V. Belov, C. Benitez-Medina, J. Bonatt, 4 M. Breidenbach, T. Brunner, A. Burenkov, G.F. Cao, C. Chambers, J. Chaves, B. Cleveland, a S. Cook, A. Craycraft, T. Daniels, M. Danilov, S.J. Daugherty, C.G. Davis, J. Davis, R. DeVoe, S. Delaquis, A. Dobi, A. Dolgolenko, M.J. Dolinski, M.(More)
We have extended our earlier measurements of parity violating asymmetries in the inelastic scattering of longitudinally polarized electrons from deuterium to cover the range 0.15 5 y I 0.36. The observed asymmetry shows only slight y dependence over this range. Our results are consistent with the expectations of the WeinbergSalam model for a value of sin2eW(More)