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Showing papers by "G. M. Irwin published in 1988"

Journal Article•DOI•
Measurement of the average lifetime of hadrons containing bottom quarks.

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D. E. Klem1, D. E. Klem2, W. B. Atwood1, W. B. Atwood2, Barry C. Barish2, Barry C. Barish1, G. R. Bonneaud2, G. R. Bonneaud1, A. Courau1, A. Courau2, G. Donaldson2, G. Donaldson1, R. Dubois1, R. Dubois2, M. M. Duro2, M. M. Duro1, E. E. Elsen2, E. E. Elsen1, S. G. Gao1, S. G. Gao2, Y. Z. Huang1, Y. Z. Huang2, G. M. Irwin2, G. M. Irwin1, R. P. Johnson2, R. P. Johnson1, H. Kichimi1, H. Kichimi2, Jasper Kirkby2, Jasper Kirkby1, D. E. Koop1, D. E. Koop2, J. Ludwig2, J. Ludwig1, G. B. Mills2, G. B. Mills1, A. Ogawa2, A. Ogawa1, T. Pal1, T. Pal2, R. Pitthan1, R. Pitthan2, D. L. Pollard1, D. L. Pollard2, C. Y. Prescott2, C. Y. Prescott1, L. S. Rochester1, L. S. Rochester2, W. Ruckstuhl2, W. Ruckstuhl1, M. Sakuda2, M. Sakuda1, S. S. Sherman1, S. S. Sherman2, Ryszard Stroynowski1, Ryszard Stroynowski2, Shuang Wang1, Shuang Wang2, Stanley G. Wojcicki2, Stanley G. Wojcicki1, H. Yamamoto2, H. Yamamoto1, W. G. Yan1, W. G. Yan2, C. C. Young2, C. C. Young1 •
Stanford University1, California Institute of Technology2
01 Jan 1988-Physical Review D
TL;DR: This measurement, in conjunction with a limit on the non-charm branching ratio in b-decay obtained by other experiments, can be used to constrain the magnitude of the V/sub cb/ element of the Kobayashi-Maskawa matrix to the range 0.042 (+0.005 or -0.004) where the errors reflect the uncertainty on tau/sub b/ only and not the uncertainties in the calculations which relate the b-lifetime and the
Abstract: This thesis reports a measurement of the average lifetime of hadrons containing bottom quarks. It is based on data taken with the DELCO detector at the PEP e/sup +/e/sup -/ storage ring at a center of mass energy of 29 GeV. The decays of hadrons containing bottom quarks are tagged in hadronic events by the presence of electrons with a large component of momentum transverse to the event axis. Such electrons are identified in the DELCO detector by an atmospheric pressure Cherenkov counter assisted by a lead/scintillator electromagnetic shower counter. The lifetime measured is 1.17 psec, consistent with previous measurements. This measurement, in conjunction with a limit on the non-charm branching ratio in b-decay obtained by other experiments, can be used to constrain the magnitude of the V/sub cb/ element of the Kobayashi-Maskawa matrix to the range 0.042 (+0.005 or -0.004 (stat.), +0.004 or -0.002 (sys.)), where the errors reflect the uncertainty on tau/sub b/ only and not the uncertainties in the calculations which relate the b-lifetime and the element of the Kobayashi-Maskawa matrix.

14 citations

Journal Article•DOI•
Search for the decays KL0--> microe and KL0-->ee.

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R. Cousins1, Jacobo Konigsberg1, J. Kubic1, P. Melese1, P. Rubin1, W. E. Slater1, J. S. Frank2, J. S. Frank3, G.W. Hart3, W. W. Kinnison3, D. M. Lee3, E. C. Milner3, G. H. Sanders3, Hans Ziock3, K. Arisaka4, P. Knibbe4, W. R. Molzon5, W. R. Molzon4, J. Urheim4, W. Wales4, S. Axelrod6, K. A. Biery6, G. R. Bonneaud6, G. M. Irwin6, Karol Lang, C. J. Martoff6, D. A. Ouimette6, J. L. Ritchie, Q. H. Trang6, Stanley G. Wojcicki6, L. B. Auerbach7, P. Buchholz7, V. L. Highland7, W. K. McFarlane7, M. Sivertz7, M. D. Chapman8, M. Eckhause8, J. F. Ginkel8, P. P. Guss8, P. P. Guss9, D. Joyce10, D. Joyce8, J. R. Kane8, C. J. Kenney8, W. F. Vulcan8, Robert E. Welsh8, R. J. Whyley8, R. G. Winter8 •
University of California, Los Angeles1, Brookhaven National Laboratory2, Los Alamos National Laboratory3, University of Pennsylvania4, University of California, Irvine5, Stanford University6, Temple University7, College of William & Mary8, AECOM9, Thomas Jefferson National Accelerator Facility10
01 Nov 1988-Physical Review D
TL;DR: In this article, the authors obtained upper limits for the decays of K/sub L/sup 0/..e and k/sub l/sup 1/n/n 0/n 2/n 1.
Abstract: We have obtained upper limits for the decays K/sub L//sup 0/..--> mu..e and K/sub L//sup 0/..-->..ee. The limits on the branching ratios are B(K/sub L//sup 0/..--> mu..e) ..ee) mu mu.., we have identified two events.

4 citations