25 results on '"Gerson Goldhaber"'
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2. Search for a nearly degenerate lepton doublet (L−,L0)
- Author
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W. B. Schmidke, D. Karlen, J. Dorfan, G. Hanson, A. J. Lankford, A. M. Boyarski, Michael Levi, J. A. Kadyk, H. Schellman, Patricia R. Burchat, J. A. Jaros, N. S. Lockyer, Timothy Barklow, I. Juricic, Mark E. Nelson, L. Golding, R. A. Ong, S. R. Klein, Burton Richter, J. Boyer, R. J. Hollebeek, G. J. Feldman, P. C. Rowson, B. W. Leclaire, G. S. Abrams, D. Herrup, D. L. Burke, R. R. Larsen, P. D. Sheldon, L. Gladney, T. Schaad, Gerson Goldhaber, J. M. Yelton, D. Amidei, A. R. Baden, F. Butler, K. Riles, V. Luth, George Gidal, M. L. Perl, Walter R. Innes, Kenneth G. Hayes, Darien Wood, G. H. Trilling, J. Haggerty, and M. S. Gold
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Physics ,Particle physics ,Annihilation ,Branching fraction ,Computer Science::Information Retrieval ,High Energy Physics::Phenomenology ,Order (ring theory) ,Elementary particle ,Nuclear physics ,Massless particle ,High Energy Physics::Experiment ,Neutrino ,Energy (signal processing) ,Lepton - Abstract
We have searched for a heavy charged lepton with an associated neutrino of nearly the same mass in {ital e}{sup +}{ital e}{sup {minus}} annihilation data taken with the Mark II detector at a center-of-mass energy of 29 GeV. In order to suppress contamination from conventional two-photon reactions, this analysis uses a novel, radiative-tagging technique. Requiring the presence of an isolated, energetic photon allows a search for lepton doublets with mass splittings smaller than that previously accessible to experiment. No evidence for such a new lepton doublet has been found, enabling limits to be placed on allowed mass combinations. Mass splittings as low as 250--400 MeV/{ital c}{sup 2} are excluded for charged-lepton masses between 500 MeV/{ital c}{sup 2} and 10 GeV/{ital c}{sup 2}.
- Published
- 1990
- Full Text
- View/download PDF
3. A reanalysis of B0-B̄0 mixing in e+e− annihilation at 29 GeV
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A. Petersen, J. M. Brom, A. Seiden, P. Voruganti, F. Butler, D. Hutchinson, Darien Wood, K. O'Shaughnessy, H. O. Ogren, J. A. Jaros, A. S. Schwarz, M. L. Perl, C. W. Peck, W. Koska, Kenneth G. Hayes, J. Boyer, K. Riles, G. Bonvicini, J. A. Kadyk, A. Breakstone, R. P. Thun, D.P. Coupal, Stephen Robert Wagner, E. Soderstrom, R. R. Larsen, Ryszard Stroynowski, D. Fujino, J. Hylef, M. S. Gold, G. H. Trilling, D. Nitz, Gerson Goldhaber, W. R. Innes, F. C. Porter, D. Y. Wu, P. Rankin, D. Amidei, R. Frey, B. D. Milliken, Timothy Barklow, E. Wicklund, P. C. Rowson, B. W. Leclaire, S. R. Klein, G. Hanson, A. J. Lankford, J. Haggerty, Jordan Nash, S. L. White, J. G. Smith, H. F.W. Sadrozinski, Alan Litke, Cords D, T. Schalk, W. B. Schmidke, S. Weisz, B. B. Brabson, Michael Levi, R. J. Hollebeek, F. Calviño, P. Weber, Patricia R. Burchat, D. E. Dorfan, M. Petradza, R. A. Ong, H. Veltman, B. A. Barnett, D. P. Stoker, W. Kozanecki, H. Schellman, G. S. Abrams, M. Jaffre, F. A. Harris, K. K. Gan, E. Fernandez, C.M. Hawkes, R. Tschirhart, Sherwood Parker, G. J. Feldman, George Gidal, R. C. Field, I. Bartelt, Fordham C, K.C. Moffeit, D. Herrup, A. J. Weinstein, T. Glanzman, J. A. J. Matthews, V. Luth, A. Snyder, P.S. Drell, W. T. Ford, L. Gladney, DeStaebler Hc, N. S. Lockyer, Mark E. Nelson, I. Juricic, R. J. Cence, B. C. Barish, D. Karlen, L. Müller, D. I. Meyer, J. M. Yelton, A. R. Baden, T. Himel, J. Kent, P. D. Sheldon, D. R. Rust, Burton Richter, D. Blockus, J. Dorfan, A. M. Boyarski, A. J. Weir, R. Van Kooten, James P. Alexander, A. Green, D. L. Burke, T. Schaad, M. Alvarez, Grosse-Wiesmann P, R. Harr, J. W. Chapman, Adolphsen Ce, C. A. Heusch, and F. Bulos
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Quark ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Annihilation ,High Energy Physics::Phenomenology ,Hadron ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Measure (mathematics) ,Nuclear physics ,High Energy Physics::Experiment ,Mixing (physics) ,Storage ring ,Lepton - Abstract
Data taken by the Mark II detector at the PEP storage ring was used to measure the rate of dilepton production in multihadronic events produced by e + e − annihilation at √ s =29 GeV. We determine the probability that a hadron initially containing a b (b) quark decays to a positive (negative) lepton to be 0.17 −0.08 +0.15 , with 90% confidence level limits of 0.06 and 0.38.
- Published
- 1990
- Full Text
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4. New Constraints on ΩM, ΩΛ, and w from an Independent Set of 11 High-Redshift Supernovae Observed with the Hubble Space Telescope
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Peter Nugent, Dale Andrew Howell, Gerson Goldhaber, Rahman Amanullah, K. Schahmaneche, M. S. Burns, Donald E. Groom, G. Garavini, Nino Panagia, Vallery Stanishev, Naoki Yasuda, A. G. Kim, K. Garton, Reynald Pain, J. Raux, A. S. Fruchter, Saul Perlmutter, Gastón Folatelli, Robert Quimby, Nicholas A. Walton, E. Smith, G. Sainton, Christopher Lidman, Lifan Wang, Sebastien Fabbro, R. A. Knop, Pilar Ruiz-Lapuente, A. Conley, G. Blanc, Ariel Goobar, Mark Sullivan, D. Hardin, Susana E. Deustua, N. Regnault, Richard S. Ellis, Pierre Astier, Bradley E. Schaefer, W. M. Wood-Vasey, Brian C. Lee, Javier Méndez, Mamoru Doi, A. L. Spadafora, R. Gibbons, S. Garmond, Greg Aldering, C. R. Pennypacker, S. Nobili, I. M. Hook, National Science Foundation (US), University of California, Knut and Alice Wallenberg Foundation, National Aeronautics and Space Administration (US), and Department of Energy (US)
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Deceleration parameter ,Astrophysics::High Energy Astrophysical Phenomena ,Cosmological parameters ,general [Supernovae] ,Supernovae: general ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Cosmological constant ,Astrophysics ,Astronomy & Astrophysics ,Atomic ,01 natural sciences ,Omega ,Cosmology ,Particle and Plasma Physics ,astro-ph ,0103 physical sciences ,Nuclear ,observations [Cosmology] ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Physics ,010308 nuclear & particles physics ,Cosmology: observations ,Molecular ,Astronomy and Astrophysics ,Redshift ,Supernova ,13. Climate action ,Space and Planetary Science ,Dark energy ,High Energy Physics::Experiment ,Astrophysics::Earth and Planetary Astrophysics ,Supernova Legacy Survey ,Astronomical and Space Sciences ,Physical Chemistry (incl. Structural) - Abstract
36 pags., 13 figs., 31 tabs., 1 app., We report measurements of ΩM, ΩΛ w from 11 supernovae (SNe) at z ¼ 0:36 0:86 with high-quality light curves measured using WFPC2 on the Hubble Space Telescope (HST). This is an independent set of high-redshift SNe that confirms previous SN evidence for an accelerating universe. The high-quality light curves available from photometry on WFPC2 make it possible for these 11 SNe alone to provide measurements of the cosmological parameters comparable in statistical weight to the previous results. Combined with earlier Supernova Cosmology Project data, the new SNe yield a measurement of the mass density ΩM ¼ 0:25þ0:07 Ω0:06 ðstatisticalÞ Λ 0:04 (identified systematics), or equivalently, a cosmological constant of ΩΛ ¼ 0:75þ0:06 Ω0:07 ðstatisticalÞ Λ 0:04 (identified systematics), under the assumptions of a flat universe and that the dark energy equation-of-state parameter has a constant value w ¼ Ω1.When the SN results are combined with independent flat-universe measurements of ΩM from cosmic microwave background and galaxy redshift distortion data, they provide a measurement of w ¼ Ω1:05þ0:15 Ω0:20 ðstatisticalÞ Λ 0:09 (identified systematic), if w is assumed to be constant in time. In addition to high-precision light-curve measurements, the new data offer greatly improved color measurements of the high-redshift SNe and hence improved host galaxy extinction estimates. These extinction measurements show no anomalous negative E(BΩ) at high redshift. The precision of the measurements is such that it is possible to perform a host galaxy extinction correction directly for individual SNe without any assumptions or priors on the parent E(BΩV) distribution. Our cosmological fits using full extinction corrections confirm that dark energy is required with PðΩΛ > 0Þ > 0:99, a result consistent with previous and current SN analyses that rely on the identification of a low-extinction subset or prior assumptions concerning the intrinsic extinction distribution., Support for this work was provided by NASA through grants HST-GO-07336.01-A and HST-GO-08346.01-A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. This work was supported in part by the Director, Office of Science,Office of High Energy and Nuclear Physics, of the US Department of Energy under Contract DE-AC03- 76SF000098, by the Center for Particle Astrophysics, an NSF Science and Technology Center operated by the University of California, Berkeley, under Cooperative Agreement AST 91-20005. This work was supported in part by a NASA LTSA grant to P. E. N., G. A., S. P., and S. E. D., and W. M. W.-V. was supported in part by a National Science Foundation Graduate Research Fellowship. A.G. is a Royal Swedish Academy Research Fellow supported by a grant from the Knut and Alice Wallenberg Foundation.
- Published
- 2003
5. From the ψ to Charmed Mesons
- Author
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Gerson Goldhaber
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Physics ,Particle physics ,Meson ,Electron–positron annihilation ,Nuclear Theory ,High Energy Physics::Phenomenology ,Dalitz plot ,Particle identification ,Charm quark ,Nuclear physics ,Particle decay ,Pion ,High Energy Physics::Experiment ,Vector meson ,Nuclear Experiment - Abstract
This talk deals with my recollections about the discoveries of the J/ψ and ψ′ as well as psion spectroscopy and charmed mesons. I give a chronology for the ψ and ψ′ discoveries. I also discuss the events which led to the charmed meson discovery as well as detailed discussions on the proof that the resonance we observed in the K - π + system, at 1865 MeV, was indeed the predicted charmed meson.
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- 1996
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6. Two-photon production of pion pairs
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Gerson Goldhaber, W. B. Schmidke, Andrew R. Baden, G. H. Trilling, D. Karlen, J. M. Yelton, D. Amidei, J. Haggerty, R. R. Larsen, George Gidal, Cords D, Michael Levi, D. Herrup, G. Hanson, J. A. Kadyk, M. S. Gold, A. J. Lankford, V. Luth, Darien Wood, N. S. Lockyer, I. Juricic, Patricia R. Burchat, H. Schellman, L. Golding, R. A. Ong, Burton Richter, R. J. Hollebeek, J. Boyer, P. D. Sheldon, F. Butler, M. L. Perl, J. Dorfan, Timothy Barklow, A. M. Boyarski, G. S. Abrams, L. Gladney, D. L. Burke, J. A. Jaros, Walter R. Innes, Kenneth G. Hayes, T. Schaad, G. J. Feldman, K. Riles, Mark E. Nelson, P. C. Rowson, and B. W. Leclaire
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Physics ,Particle physics ,Unitarity ,Meson ,Hadron ,Elementary particle ,Crystallography ,Pion ,Pair production ,Angular distribution ,TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY ,High Energy Physics::Experiment ,Nuclear Experiment ,Boson - Abstract
We present a new high-statistics measurement of the cross section for the process {ital e}{sup +}{ital e}{sup {minus}}{r arrow}{ital e}{sup +}{ital e}{sup {minus}}{pi}{sup +}{pi}{sup {minus}} at a center-of-mass energy of 29 GeV for invariant pion-pair masses {ital M}({pi}{sup +}{pi}{sup {minus}}) between 350 MeV/{ital c}{sup 2} and 1.6 GeV/{ital c}{sup 2}. We observe the {ital f}{sub 2}(1270) and measure its radiative width to be 3.15{plus minus}0.04{plus minus}0.39 keV. We also observe an enhancement in the {pi}{sup +}{pi}{sup {minus}} spectrum near 1 GeV. General agreement is found with unitarized models of the {gamma}{gamma}{r arrow}{pi}{sup +}{pi}{sup {minus}} reaction that include final-state interactions.
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- 1990
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7. The Mark II detector for the SLC
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M. Kuhlen, F. Bulos, S. R. Klein, B. A. Barnett, C. Boswell, Z. Li, B. D. Milliken, M. Swartz, P. D. Dauncey, B. B. Brabson, A. Snyder, J. Dorfan, P. Voruganti, A. Petersen, Barry C. Barish, J. A. J. Matthews, R. Pitthan, R. Van Kooten, C. K. Jung, I. Juricic, M. Jaffre, G. H. Trilling, K. Braune, Mark E. Nelson, M. Chmeissani, R. Harr, G. S. Abrams, R. R. Larsen, A. M. Boyarski, R. P. Thun, Ryszard Stroynowski, F. Perrier, Jordan Nash, D. Fujino, A. Seiden, J Perl, J. Haggerty, Giorgio Gratta, Ballam J, F. Butler, B.A. Schumm, J. A. Jaros, J. G. Smith, Averill D, P. Rankin, L. Müller, S. Weisz, M. Yurko, J. W. Chapman, Adolphsen Ce, G. Lynch, S. O. Holmgren, A. Green, A. S. Schwarz, C. Zaccardelli, Hartmut Sadrozinski, Sherwood Parker, Clemens A. Heusch, M. L. Perl, C. von Zanthier, J. M. Brom, Walter R. Innes, J. Boyer, M. Hoenk, D. P. Stoker, King M, A. Weigend, K. Riles, Carl W. Akerlof, William T. Ford, Kenneth G. Hayes, Jacobsen Rg, Field Rc, Fordham C, W. Koska, A. J. Weir, Hinshaw Da, James P. Alexander, D. Hutchinson, C. Gatto, W. N. Murray, L. Labarga, F. A. Harris, D.P. Coupal, R. Tschirhart, Timothy Barklow, C.T. Munger, Stephen Robert Wagner, K. C. Moffeit, Alan Litke, Hearty C, M. Woods, J.F. Kral, D. L. Burke, Cords D, Michael Levi, L.A. Kowalski, Darien Wood, S. Vejcik, Drewer Dc, C.M. Hawkes, D.S. Koetke, R. Frey, J. A. McKenna, T. Glanzman, K. O'Shaughnessy, C. W. Peck, M. Alvarez, Hong Sj, D. Nitz, D. Y. Wu, S. Komamiya, Grosse-Wiesmann P, D. Blockus, J. Hylen, Harral B, E. Wicklund, A. J. Lankford, P.S. Drell, A. Koide, P. Weber, John E. Bartelt, Patricia R. Burchat, DeStaebler Hc, W. De Boer, G. Wormser, A. Breakstone, Frank C. Porter, W. B. Schmidke, S. L. White, E. Fernandez, Gero E, L. Koepke, M. Turala, G. J. Feldman, Robert E. Wright, K. K. Gan, D. Herrup, R. C. Wolf, D. E. Dorfan, H. O. Ogren, G. Bonvicini, Richard E. Taylor, George Gidal, F. Rouse, Fernandes D, A. R. Baden, Jeffrey Richman, A. J. Weinstein, M. Petradza, R. A. Ong, G. Hanson, F. Calviño, H. Veltman, W. Kozanecki, V. Luth, X. Gong, J.J. Gomez Cadenas, T. Himel, J. A. Kadyk, R. J. Cence, M. W. Schaad, E. Soderstrom, Thomas S. Mattison, D. Karlen, J. Kent, J. Fay, D. R. Rust, S. Watson, and Gerson Goldhaber
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Physics ,Nuclear and High Energy Physics ,Luminosity (scattering theory) ,Physics::Instrumentation and Detectors ,Detector ,law.invention ,Nuclear physics ,Data acquisition ,Electromagnetic calorimeter ,law ,Electromagnetic coil ,Measuring instrument ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Collider ,Instrumentation ,Storage ring - Abstract
The Mark II detector has been upgraded in preparation for its role as the first detector to take data at the Stanford Linear Collider. The new detector components include the central drift chamber, the time-of-flight system, the coil, the endcap electromagnetic calorimeters and the beam energy and luminosity measuring devices. There have also been improvements in detector hermeticity. All of the major components were installed for a test run at the PEP storage ring (√s = 29 GeV) in 1985. This paper describes the upgraded detector, including its trigger and data acquisition systems, and gives performance figures for its components. Future improvements are also discussed.
- Published
- 1989
- Full Text
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8. Radiative decays of theψ(3684)into high-mass states
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R. H. Schindler, H. L. Lynch, J. A. Jaros, H. K. Nguyen, R. G. Devoe, M. S. Alam, P. A. Rapidis, J. L. Siegrist, James E Wiss, Burton Richter, Roy F Schwitters, V. Luth, R. J. Madaras, J. M. Paterson, F. M. Pierre, A. M. Boyarski, G. J. Feldman, Gerson Goldhaber, I. Peruzzi, M. Piccolo, M. L. Perl, W. Chinowksy, Martin Breidenbach, G. S. Abrams, F. Vannucci, Bernard Sadoulet, D. Lüke, G. Hanson, J. S. Whitaker, T. P. Pun, G. H. Trilling, J. A. Kadyk, R. R. Larsen, C. E. Friedberg, W. Tanenbaum, and A. D. Johnson
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Nuclear physics ,Physics ,Angular momentum ,Meson ,Branching fraction ,Excited state ,Hadron ,Radiative transfer ,High Energy Physics::Experiment ,Elementary particle ,Boson - Abstract
*Results of studies of radiative decays of the #(3684) using ‘the SLAC-LBL magnetic detector at the electron storage ring SPEAR are presented. There are three high mass states produced in $(3684) radiative decays, with masses of 3414 i 3, 3503 rt 4, and 355 1 h 4 MeV where the errors given do not include an overall mass scale uncertainty of ~4 MeV. There is some evidence for a fourth such state at either 3455 or 3340 MeV. The branching ratio for +(3684) radiative decay into the state at 3414 MeV is found to be 7.5 rt 2.6%. The decay modes of these states into hadrons and into y $(3095) are studied, yielding information about the branching ratios, spins, and parities of the states. The results are interpreted in the charmonium picture of the high mass states.
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- 1978
- Full Text
- View/download PDF
9. Mesonic decays of theψ(3095)
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George H. Trilling, J. A. Kadyk, Martin Breidenbach, Burton Richter, T. P. Pun, V. Luth, M. Piccolo, James E Wiss, Gerson Goldhaber, M. S. Alam, P. A. Rapidis, G. J. Feldman, J. A. Jaros, J. M. Paterson, G. Hanson, F. Vannucci, I. Peruzzi, H. L. Lynch, B. Jean-Marie, H. K. Nguyen, R. J. Madaras, Frederick J. Gilman, J. S. Whitaker, B. Sadoulet, D. Lüke, R. R. Larsen, A. M. Boyarski, F. M. Pierre, C. C. Morehouse, G. S. Abrams, W. Tanenbaum, William Chinowsky, Roy F Schwitters, D. Fryberger, and C. E. Friedberg
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Nuclear physics ,Physics ,Particle physics ,Meson ,Branching fraction ,Isospin ,Hadron ,Bound state ,Mass spectrum ,High Energy Physics::Experiment ,Elementary particle ,Nuclear Experiment ,Omega - Abstract
We present branching ratios for several mesonic decay modes of the psi (3095). The two-body and quasi-two-body final states have branching ratios that follow the general pattern of behavior expected for the decay of an SU(3) singlet via an SU(3) -symmetric interaction. The ..pi../sup +/..pi../sup -/ and K/sup +/K/sup -/ mass spectra in ..omega pi pi.., ..omega..KK, phi..pi pi.., and phiKK final states show remarkable differences that are most readily interpretable in terms of the Okubo-Zweig-Iizuka rule.
- Published
- 1977
- Full Text
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10. Studies of jet production rates ine + e ? annihilation atE cm=29 GeV
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T. Schalk, H. O. Ogren, Jordan Nash, G. Bonvicini, Bethke S, J. M. Brom, S. Weisz, Timothy Barklow, Cence Rj, W. Koska, Alan Litke, J. Kent, T. Himel, A. R. Baden, D. E. Dorfan, R. P. Thun, Frank C. Porter, W. B. Schmidke, G. S. Abrams, J. R. Smith, K. K. Gan, Grosse-Wiesmann P, Glanzman T, G. J. Feldman, E. Soderstrom, Fordham C, Z. Li, A. Green, F. A. Harris, D. R. Rust, D. Herrup, R. R. Larsen, Ryszard Stroynowski, D. Fujino, B. D. Milliken, P. Voruganti, J. Boyer, B. A. Barnett, M. Petradza, H. F.W. Sadrozinski, Cords D, D. L. Burke, Abraham Seiden, J. A. J. Matthews, F. Calviño, Michael Levi, Ballam J, K. O'Shaughnessy, H. Veltman, I. Juricic, C. W. Peck, Sherwood Parker, W. Kozanecki, Chapman J, Gerson Goldhaber, George H. Trilling, D. Karlen, DeStaebler Hc, G. Hanson, V. Luth, A. Breakstone, A. Snyder, C.M. Hawkes, B. C. Barish, S. R. Klein, Bartelt J, D. Hutchinson, J. A. Kadyk, P. Rankin, B. B. Brabson, Adolphsen Ce, Mark E. Nelson, E. Fernandez, A. S. Schwarz, M. Hoenk, P. S. Drell, Field Rc, F. Bullos, R. Tschirhart, S. L. White, William T. Ford, J. P. Alexander, D. I. Meyer, George Gidal, M. Alvarez, C. A. Heusch, Walter R. Innes, Kenneth G. Hayes, F. Frey, J. Haggerty, D.P. Coupal, L. Müller, Stephen Robert Wagner, K. C. Moffeit, A. J. Weir, C. W. Akerlof, S. Komamiya, D. Blockus, A. Petersen, J. Dorfan, J. A. Jaros, E. Wicklund, A. J. Lankford, F. Butler, R. Van Kooten, P. Weber, A. M. Boyarski, K. Riles, Patricia R. Burchat, D. P. Stoker, R. Harr, A. J. Weinstein, M. Jaffre, Darien Wood, D. Nitz, D. Y. Wu, and J. Hylen
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Physics ,Quantum chromodynamics ,Particle physics ,Annihilation ,Physics and Astronomy (miscellaneous) ,Astrophysics::High Energy Astrophysical Phenomena ,Electron–positron annihilation ,Hadron ,Perturbative QCD ,Parton ,Gluon ,Nuclear physics ,Nuclear fusion ,High Energy Physics::Experiment ,Engineering (miscellaneous) - Abstract
Production rates of multijet hadronic final states are studied ine + e − annihilation at 29 GeV center of mass energy. QCD shower model calculations with exact first order matrix element weighting at the first gluon vertex are capable of reproducing the observed multijet event rates over a large range of jet pair masses. The method used to reconstruct jets is well suited for directly comparing experimental jet rates with parton rates calculated in perturbative QCD. Evidence for the energy dependene of α s is obtained by comparing the observed production rates of 3-jet events with results of similar studies performed at higher center of mass energies.
- Published
- 1989
- Full Text
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11. Search for B-decay to Higgs bosons for Higgs boson masses between 50 and 210 MeV/c2
- Author
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Abraham Seiden, George H. Trilling, D. Nitz, D. Y. Wu, B. D. Milliken, A. S. Schwarz, Gerson Goldhaber, J. Dorfan, P. Voruganti, J. Hylen, R. J. Hollebeek, J. M. Brom, E. Wicklund, A. J. Lankford, Clemens A. Heusch, K. K. Gan, D. I. Meyer, N. S. Lockyer, R. Van Kooten, D. Herrup, A. Petersen, P. Weber, M. Jaffre, S. L. White, Patricia R. Burchat, J. A. Kadyk, A. M. Boyarski, D. Hutchinson, J. A. J. Matthews, E. Soderstrom, F. Butler, Jordan Nash, G. J. Feldman, S. R. Klein, M. S. Gold, S. Weisz, P. Rankin, F. Calviño, B. B. Brabson, K. O'Shaughnessy, C. W. Peck, W. N. Murray, F. Bulos, H. Veltman, A. Breakstone, H. O. Ogren, Grosse-Wiesmann P, Darien Wood, K. Riles, W. Kozanecki, Fordham C, George Gidal, Carl W. Akerlof, Burton Richter, G. Bonvicini, D. Blockus, R. Frey, V. Luth, M. Petradza, R. A. Ong, W. Koska, Frank C. Porter, W. B. Schmidke, J. R. Smith, D. P. Stoker, G. Hanson, Cence Rj, D. L. Burke, A.J. Weinstein, T. Himel, A. J. Weir, D. Amidel, T. Schaad, M. Alvarez, Timothy Barklow, R. Harr, Alan Litke, Adolphsen Ce, J. Haggerty, G. S. Abrams, Cords D, Michael Levi, J. M. Yelton, H. Schellman, C.M. Hawkes, A. R. Baden, D. E. Dorfan, L. Müller, J. W. Chapman, F.A. Harris, R. R. Larsen, Ryszard Stroynowski, D. Fujino, H. F.W. Sadrozinski, T. Schalk, J.P. Alexander, R. Tschirhart, William T. Ford, P. C. Rowson, Glanzman T, J. Boyer, B. W. Leclaire, Sherwood Parker, A. Snyder, Mark E. Nelson, B. A. Barnett, L. Gladney, B. C. Barish, I. Juricic, D. R. Rust, R. P. Thun, Bartelt J, J. Kent, Field Rc, P. D. Sheldon, P.S. Drell, D. Karlen, DeStaebler Hc, J. A. Jaros, M. L. Perl, Walter R. Innes, Kenneth G. Hayes, E. Fernandez, D.P. Coupal, Stephen Robert Wagner, and K. C. Moffeit
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Physics ,Nuclear and High Energy Physics ,Gauge boson ,Particle physics ,High Energy Physics::Phenomenology ,Higgs sector ,Vector boson ,Standard Model ,Nuclear physics ,symbols.namesake ,Higgs field ,symbols ,Higgs boson ,High Energy Physics::Experiment ,Higgs mechanism ,Boson - Abstract
We use data from the Mark II experiment at PEP to search for the process B→h 0 X for m h 0 between 50 and 210 MeV/ c 2 . No evidence for the Higgs boson is seen in this mass range. The limit obtained rules out the standard Higgs boson for masses between 70 and 210 MeV/ c 2 and significantly constrains extensions of the Higgs sector.
- Published
- 1989
- Full Text
- View/download PDF
12. Baryonic decays of theψ(3095)
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J. M. Paterson, G. Hanson, J. A. Jaros, R. J. Madaras, G. J. Feldman, G. S. Abrams, Burton Richter, Rafe Schindler, V. Luth, M. S. Alam, H. L. Lynch, P. A. Rapidis, J. L. Siegrist, H. K. Nguyen, Martin Breidenbach, D. Lüke, George H. Trilling, M. Piccolo, A. M. Boyarski, James E Wiss, A. D. Johnson, J. A. Kadyk, Gerson Goldhaber, Roy F Schwitters, I. Peruzzi, T. P. Pun, W. Tanenbaum, and William Chinowsky
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Physics ,Nuclear physics ,Particle physics ,Antiparticle ,Meson ,Branching fraction ,Isospin ,Hadron ,Quark model ,High Energy Physics::Experiment ,Nucleon ,Quantum number - Abstract
We have measured the branching ratios for a number of psi (3095) decay modes involving protons or ..lambda..'s. We present an analysis of the properties of these final states, which provides information on psi (3095) quantum numbers and the presence of resonances in the final states.
- Published
- 1978
- Full Text
- View/download PDF
13. Determination ofαsfrom energy-energy correlations ine+e−annihilation at 29 GeV
- Author
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J. S. Haggerty, C. A. Heusch, R. Van Kooten, W. Koska, Darien Wood, B. A. Barnett, L. Golding, R. Tschirhart, Kenneth G. Hayes, A. J. Lankford, J. A. Kadyk, D.P. Coupal, Stephen Robert Wagner, S. L. White, Timothy Barklow, P. S. Drell, D. L. Burke, R. Harr, H. O. Ogren, J. A. Jaros, F. Calviño, A. S. Schwarz, Ryszard Stroynowski, M. Petradza, R. A. Ong, D. Fujino, G. Bonvicini, J. P. Alexander, M. L. Perl, I. Juricic, DeStaebler Hc, B. C. Barish, A. Green, R. R. Larsen, P. Rankin, Alan Litke, R. J. Hollebeek, G. S. Abrams, H. F.W. Sadrozinski, A. Snyder, J. M. Brom, J. W. Chapman, D. Karlen, W. B. Schmidke, T. Schalk, G. J. Feldman, R. Frey, D. Nitz, D. Y. Wu, D. Amidei, T. Schaad, R. P. Thun, D. Hutchinson, W. T. Ford, J. Hylen, Gerson Goldhaber, H. Schellman, M. Alvarez, L. Müller, E. Fernandez, B. B. Brabson, Adolphsen Ce, J. A. J. Matthews, W. Kozanecki, Mark E. Nelson, P. R. Burchat, J. Kent, Z. Li, B. D. Milliken, D. I. Meyer, Grosse-Wiesmann P, A. Petersen, E. Wicklund, K. K. Gan, P. C. Rowson, B. W. Leclaire, J. G. Smith, F. A. Harris, D. R. Rust, A. Koide, P. Weber, John E. Bartelt, D. Herrup, A. Seiden, F. Butler, K. Riles, D. P. Stoker, M. E. Levi, P. Voruganti, T. Glanzman, R. C. Field, K.C. Moffeit, Jordan Nash, J. Boyer, W. R. Innes, M. Hoenk, F. Bulos, F. C. Porter, J. Ballam, M. Jaffré, Burton Richter, C. De La Vaissiere, D. Blockus, V. Luth, S. Weisz, R. J. Cence, George Gidal, Larry D. Gladney, P. D. Sheldon, Carl W. Akerlof, Cords D, A. J. Weinstein, Sherwood Parker, G. Hanson, C. Matteuzzi, A. Baden, K. O'Shaughnessy, C. W. Peck, J. Dorfan, John Yelton, A. M. Boyarski, S. R. Klein, C. M. Hawkes, G. H. Trilling, E. Soderstrom, N. S. Lockyer, A. J. Weir, T. Himel, Fordham C, A. Breakstone, D. E. Dorfan, M. S. Gold, and H. Veltman
- Subjects
Quantum chromodynamics ,Coupling constant ,Nuclear physics ,Physics ,Particle physics ,Annihilation ,Electron–positron annihilation ,Quark model ,Hadron ,High Energy Physics::Experiment ,Nuclear Experiment ,Storage ring ,Hadronization - Abstract
We have studied the energy-energy correlation in e+e- annihilation into hadrons at s =29 GeV using the Mark II detector at the SLAC storage ring PEP. We find to O(s2) that s=0.1580.0030.008 if hadronization is described by string fragmentation. Independent fragmentation schemes give s=0.100.14, and give poor agreement with the data. A leading-log shower fragmentation model is found to describe the data well. © 1988 The American Physical Society.
- Published
- 1988
- Full Text
- View/download PDF
14. Multihadronic events atEc.m.=29 GeV and predictions of QCD models fromEc.m.=29 GeV toEc.m.=93 GeV
- Author
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B. W. Leclaire, Cords D, John Yelton, Jordan Nash, C. A. Heusch, K. K. Gan, S. Weisz, L. Golding, K. O'Shaughnessy, W. Koska, C. W. Peck, T. Schalk, D. Herrup, E. Fernandez, A. J. Weir, R. J. Hollebeek, Kenneth G. Hayes, P. Voruganti, R. Harr, J. S. Haggerty, D. R. Rust, E. Soderstrom, R. C. Field, K.C. Moffeit, Sherwood Parker, E. Wicklund, Fordham C, Larry D. Gladney, A. Breakstone, R. Frey, C. De La Vaissiere, Darien Wood, B. A. Barnett, Adolphsen Ce, Timothy Barklow, Alan Litke, A. Koide, P. Weber, J. A. Jaros, A. J. Weinstein, John E. Bartelt, M. E. Levi, D.P. Coupal, J. W. Chapman, Stephen Robert Wagner, M. Petradza, R. A. Ong, C. M. Hawkes, A. Snyder, A. Petersen, J. A. J. Matthews, W. Kozanecki, H. O. Ogren, P. S. Drell, D. Amidei, T. Himel, R. R. Larsen, G. S. Abrams, B. B. Brabson, F. Bulos, Ryszard Stroynowski, D. Fujino, M. S. Gold, A. Green, W. T. Ford, A. Seiden, F. Butler, P. Rankin, N. S. Lockyer, DeStaebler Hc, A. S. Schwarz, G. Bonvicini, George Gidal, J. P. Alexander, Mark E. Nelson, F. Calviño, M. Jaffré, M. L. Perl, H. F.W. Sadrozinski, Gerson Goldhaber, I. Juricic, H. Schellman, H. Veltman, R. J. Cence, Z. Li, J. Boyer, Carl W. Akerlof, D. I. Meyer, B. D. Milliken, Grosse-Wiesmann P, F. A. Harris, T. Glanzman, R. Tschirhart, K. Riles, M. Hoenk, S. L. White, D. Nitz, D. Y. Wu, P. D. Sheldon, J. Ballam, J. Hylen, R. Van Kooten, P. R. Burchat, R. P. Thun, D. P. Stoker, A. J. Lankford, B. C. Barish, D. Karlen, J. Kent, Burton Richter, D. Blockus, J. Dorfan, A. M. Boyarski, S. R. Klein, L. Müller, G. J. Feldman, D. L. Burke, T. Schaad, M. Alvarez, W. R. Innes, F. C. Porter, J. A. Kadyk, W. B. Schmidke, G. Hanson, C. Matteuzzi, A. Baden, G. H. Trilling, J. M. Brom, D. Hutchinson, J. G. Smith, D. E. Dorfan, and P. C. Rowson
- Subjects
Nuclear physics ,Physics ,Quantum chromodynamics ,Particle physics ,Annihilation ,Electron–positron annihilation ,Hadron ,High Energy Physics::Experiment ,Elementary particle ,Parton ,Rapidity ,Hadronization - Abstract
Multihadronic e/sup +/e/sup -/ annihilation events at a center-of-mass energy of 29 GeV have been studied with both the original (PEP 5) Mark II and the upgraded Mark II detectors. Detector-corrected distributions from global shape analyses such as aplanarity, Q/sub 2/-Q/sub 1/, sphericity, thrust, minor value, oblateness, and jet masses, and inclusive charged-particle distributions including x, rapidity, p/sub perpendicular/, and particle flow are presented. These distributions are compared with predictions from various multihadron event models which use leading-logarithmic shower evolution or QCD matrix elements at the parton level and string or cluster fragmentation for hadronization. The new generation of parton-shower models gives, on the average, a better description of the data than the previous parton-shower models. The energy behavior of these models is compared to existing e/sup +/e/sup -/ data. The predictions of the models at a center-of-mass energy of 93 GeV, roughly the expected mass of the Z/sup 0/, are also presented.
- Published
- 1988
- Full Text
- View/download PDF
15. D-meson production ine+e−annihilation atEc.m.between 3.8 and 6.7 GeV
- Author
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C. Y. Pang, A. D. Johnson, M. S. Alam, J. L. Siegrist, J. B. Dillon, A. Blondel, I. Videau, G. S. Abrams, D. L. Burke, R. R. Larsen, W. E. Dieterle, V. Luth, J. Strait, J. F. Patrick, D. L. Scharre, Martin Breidenbach, M. W. Eaton, R. J. Hollebeek, T. Himel, J. A. Jaros, C. A. Blocker, H. Zaccone, R. A. Vidal, M. E. B. Franklin, E. N. Vella, William Chinowsky, Gerson Goldhaber, George H. Trilling, A. M. Boyarski, George Gidal, J. A. Kadyk, M. Tonutti, A. J. Lankford, Burton Richter, P. Jenni, Mark E. Nelson, A. Roussarie, H. Taureg, M. L. Perl, Walter R. Innes, R. E. Millikan, J. M. Weiss, D. G. Hitlin, R. F. Schwitters, S. Cooper, J. Dorfan, W. C. Carithers, Rafe Schindler, M. W. Coles, K. A. Hayes, G. Hanson, J. Dorenbosch, and G. J. Feldman
- Subjects
Physics ,Scattering cross-section ,Particle physics ,Annihilation ,Meson ,Nuclear Theory ,High Energy Physics::Phenomenology ,Spectral line ,Nuclear physics ,Charmed baryons ,Recoil ,D meson ,High Energy Physics::Experiment ,Spear ,Nuclear Experiment - Abstract
The Mark II detector at SPEAR has been used to study D-meson production in e+e- annihilation at center-of-mass energies between 3.8 and 6.7 GeV. The neutral and charged D mesons are identified from their K and K decay modes. Measurements of RD and of the inclusive differential cross section s ddz are presented. The quasi-two-body cross sections DD, D*D, and D*D* are derived from an overall fit to the D recoil spectra. No evidence was found for the associated production of charmed mesons and charmed baryons. © 1982 The American Physical Society.
- Published
- 1982
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- View/download PDF
16. Charmed Mesons Produced in e+e- Annihilation
- Author
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Gerson Goldhaber and James E Wiss
- Subjects
Physics ,Semileptonic decay ,Nuclear and High Energy Physics ,Particle physics ,Annihilation ,Meson ,Branching fraction ,High Energy Physics::Lattice ,High Energy Physics::Phenomenology ,Nuclear Theory ,Hadron ,Elementary particle ,Nuclear physics ,Particle decay ,High Energy Physics::Experiment ,Invariant mass ,Nuclear Experiment - Abstract
The production decay modes, spin, and mass of D mesons are reviewed. Properties of the F meson are discussed briefly. (AIP)
- Published
- 1980
- Full Text
- View/download PDF
17. Double Regge Description ofωProduction inK+pInteractions
- Author
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A. Firestone, C. Fu, Gideon Alexander, Gerson Goldhaber, and Alberto Pignotti
- Subjects
Physics ,Particle physics ,Meson ,Quantum mechanics ,General Physics and Astronomy ,Resonance ,Dalitz plot ,High Energy Physics::Experiment ,Elementary particle ,Field theory (psychology) ,Production (computer science) ,Nuclear Experiment ,Omega - Abstract
We present results on the $\ensuremath{\omega}$ and $\ensuremath{\phi}$ production in ${K}^{+}p\ensuremath{\rightarrow}{K}^{+}\ensuremath{\omega}p$ and ${K}^{+}p\ensuremath{\rightarrow}{K}^{+}\ensuremath{\phi}p$ interactions at incident momenta of 4.6 and 9.0 $\frac{\mathrm{GeV}}{c}$. There is no statistically significant evidence for $K\ensuremath{\omega}$ or $K\ensuremath{\phi}$ resonance production. The 437 ${K}^{+}\ensuremath{\omega}p$ events at 9 $\frac{\mathrm{GeV}}{c}$ are analyzed in terms of a multiperipheral Regge model on the entire Dalitz plot. The events have been assigned to the various peripheral diagrams on the basis of criteria in the four-momentum transfers. A satisfactory description of the data has been obtained on the basis of diagrams involving Pomeranchuk and meson exchanges.
- Published
- 1969
- Full Text
- View/download PDF
18. The Kπ system in the channel K+π−Δ++ at 9 GeV/c
- Author
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George H. Trilling, Gerson Goldhaber, A. Firestone, and C. Fu
- Subjects
Physics ,Nuclear physics ,Momentum ,Nuclear and High Energy Physics ,Pion ,Dalitz plot ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment - Abstract
The study of the Kπ system in the channel K+π−Δ++ is complicated by the presence of the broad low-mass Δ++π− enhancement centered near 1580 MeV. A cut which removes this effect reveals a break in the t′ distribution at |t′| ≈ 0.05 (GeV/c)2, with a very steep forward peak of slope a = 23.6±5.2 (GeV/c)−2 for 2. |t′| ;.sfnc;t′| ⩾ 0.05 (GeV/c) We associate this forward peak with a single-pion-exchange mechanism. A small enhancement at M(K+π−) ≈ 1100 MeV is observed in a t′ region dominated by non-pion-exchange mechanisms.
- Published
- 1970
- Full Text
- View/download PDF
19. Evidence for structure in the Kπ mass system near 1.85 GeV
- Author
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A. Firestone, G. H. Trilling, Gerson Goldhaber, and D. Lissauer
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Pion ,Astrophysics::High Energy Astrophysical Phenomena ,Resonance ,High Energy Physics::Experiment ,Neutron ,Nuclear Experiment ,Mass system - Abstract
We present evidence for structure in the Kπ system at a mass near 1.85 GeV in the reaction K+n→K+π−p at 12 GeV/c. One interpretation of the observations is the production by pion exchange of a J P = 3 − K ∗ resonance at about this mass, which interferes strongly with other processes.
- Published
- 1971
- Full Text
- View/download PDF
20. Meson exchange in the reaction K+ + p → K∗ + N∗
- Author
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Gerson Goldhaber, William Chinowsky, Won-Yong Lee, Sulamith Goldhaber, and T. O'Halloran
- Subjects
Many-body problem ,Physics ,Pion ,Meson ,Branching fraction ,Isospin ,Pi ,General Physics and Astronomy ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,Nucleon ,Electric charge - Abstract
The four-particle final states of the K/sup +/-p interaction at 1.96 Bev/ c were investigated. It is found that these states are predominantly produced via the double resonance production K/sup +/ + p yields K/sup */ + N/sup */. The experimental data support a spin-zero meson exchange, presumably a meson( pi ), for small four-momentum transfers. The four particles produced in the reaction are in the isotopic spin T = 1 state and occur in five possible charge combinations. The observed cross sections of these reactions and the branching ratios expected on the assumption that the nucleon and meson( pi ) are always produced in the T = 3/2 state and that the meson (K) and ( pi ) are always produced in the T = 1/2 state are presented. (C.E.S.)
- Published
- 1963
- Full Text
- View/download PDF
21. Azimuthal Asymmetry in Inclusive Hadron Production bye+e−Annihilation
- Author
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James E Wiss, B. A. Lulu, George H. Trilling, Gerson Goldhaber, F. Vannucci, Roy F Schwitters, A. M. Boyarski, P. A. Rapidis, G. Hanson, R. R. Larsen, H. L. Lynch, T. P. Pun, J. A. Kadyk, B. Jean-Marie, Martin Breidenbach, J. S. Whitaker, G. S. Abrams, W. Tanenbaum, V. Luth, F. Bulos, William Chinowsky, C. C. Morehouse, M. L. Perl, J. M. Paterson, D. Lüke, D. L. Hartill, G. J. Feldman, F. M. Pierre, F. C. Winkelmann, Bernard Sadoulet, C. E. Friedberg, Burton Richter, and A. Litke
- Subjects
Physics ,Particle physics ,Annihilation ,media_common.quotation_subject ,Electron–positron annihilation ,Hadron ,General Physics and Astronomy ,Polarization (waves) ,Asymmetry ,Nuclear physics ,Transverse plane ,High Energy Physics::Experiment ,Nuclear Experiment ,Scaling ,Storage ring ,media_common - Abstract
We have observed an azimuthal asymmetry in inclusive hadron production by e+e− annihilation at the center-of-mass energy s=7.4 GeV. The asymmetry is caused by the polarization of the circulating beams in the storage ring and allows separate determination of the transverse and longitudinal structure functions. We find that transverse production dominates for x>0.2 where x is the scaling variable 2ps.
- Published
- 1975
- Full Text
- View/download PDF
22. Discovery of a Narrow Resonance ine+e−Annihilation
- Author
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George H. Trilling, J. A. Kadyk, J. T. Dakin, James E Wiss, J. E. Augustin, C. C. Morehouse, C. E. Friedberg, V. Luth, H. L. Lynch, G. S. Abrams, P. A. Rapidis, F. Vannucci, B. Jean-Marie, W. Tanenbaum, A. M. Boyarski, R. R. Larsen, J. S. Whitaker, Gerson Goldhaber, G. Hanson, Martin Breidenbach, J. E. Zipse, M. L. Perl, William Chinowsky, R. J. Hollebeek, D. Fryberger, J. M. Paterson, D. Briggs, G. J. Feldman, F. M. Pierre, Burton Richter, B. A. Lulu, D. Lyon, G. E. Fischer, Roy F Schwitters, and F. Bulos
- Subjects
Physics ,Particle physics ,Annihilation ,Electron–positron annihilation ,Hadron ,General Physics and Astronomy ,Resonance ,High Energy Physics::Experiment ,Nuclear Experiment ,Energy (signal processing) ,Full width - Abstract
We have observed a very sharp peak in the cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}, {e}^{+}{e}^{\ensuremath{-}}$, and possibly ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ at a center-of-mass energy of 3.105\ifmmode\pm\else\textpm\fi{}0.003 GeV. The upper limit to the full width at half-maximum is 1.3 MeV.
- Published
- 1974
- Full Text
- View/download PDF
23. Discovery of a Second Narrow Resonance ine+e−Annihilation
- Author
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C. C. Morehouse, F. Vannucci, G. Hanson, George H. Trilling, G. E. Fischer, W. Tanenbaum, B. A. Lulu, J. A. Kadyk, D. Fryberger, G. J. Feldman, R. J. Hollebeek, P. A. Rapidis, Bernard Sadoulet, D. Lyon, J. E. Augustin, F. M. Pierre, D. Briggs, B. Jean-Marie, H. L. Lynch, G. S. Abrams, C. E. Friedberg, Gerson Goldhaber, Martin Breidenbach, R. R. Larsen, Roy F Schwitters, William Chinowsky, J. E. Zipse, J. S. Whitaker, V. Luth, Burton Richter, James E Wiss, M. L. Perl, F. Bulos, J. M. Paterson, A. M. Boyarski, and A. Litke
- Subjects
Physics ,Particle physics ,Annihilation ,Electron–positron annihilation ,Hadron ,General Physics and Astronomy ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,Resonance (particle physics) ,Energy (signal processing) ,Full width - Abstract
We have observed a second sharp peak in the cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}$ at a center-of-mass energy of 3.695\ifmmode\pm\else\textpm\fi{}0.004 GeV. The upper limit of the full width at half-maximum is 2.7 MeV.
- Published
- 1974
- Full Text
- View/download PDF
24. Measurement of the branching fractions of the tau lepton using a tagged sample of tau decays
- Author
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A. J. Lankford, G. J. Feldman, Patricia R. Burchat, D. Karlen, Darien Wood, Burton Richter, J. Boyer, George H. Trilling, J. M. Yelton, D. Amidei, A. R. Baden, J. Dorfan, J. A. Kadyk, L. Golding, Michael Levi, F. Butler, I. Juricic, George Gidal, A. M. Boyarski, M. L. Perl, R. R. Larsen, W. B. Schmidke, H. Schellman, Marc Ross, Gerson Goldhaber, K. Riles, L. Gladney, Walter R. Innes, N. S. Lockyer, Kenneth G. Hayes, D. L. Burke, C. De La Vaissiere, J. Haggerty, C. Matteuzzi, C. Zaiser, P. D. Sheldon, R. A. Ong, T. Schaad, G. Hanson, R. J. Hollebeek, M. S. Gold, D. Herrup, Mark E. Nelson, P. C. Rowson, B. W. Leclaire, J. A. Jaros, G. S. Abrams, V. Luth, Timothy Barklow, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Physics ,Nuclear physics ,Particle physics ,Pion ,Annihilation ,Meson ,Branching fraction ,Electron–positron annihilation ,Hadron ,High Energy Physics::Experiment ,Branching (polymer chemistry) ,Lepton - Abstract
The branching fractions for the major decay modes of the lepton are measured from a sample of tagged decays selected from +- pairs produced in e+e- annihilation. The decay products of one member of the +- pair are used to identify the event. The opposite member of the pair is then included in the sample if it satisfies an invariant-mass cut and a charged-multiplicity cut. In this way, we attempt to select an unbiased sample of decays. The sample is divided into categories based on charged- and neutral-particle multiplicities, and charged-particle identification. The branching fractions are measured simultaneously, with an unfold technique and a maximum-likelihood fit, with the sum of the branching fractions constrained to be unity. The branching fractions for the decay modes - K- and - K*- are fixed at the world averages in the fit. The following branching fractions are measured: B(-e) =(19.10.81.1)%, B(-' - )=(18.30.90.8)%, B(-) =(10.01.1 *1,4)%, B(-0) =(25.81.72.5)%, B(-(n0, n>1))=(12.01.42.5)%, B(-+-) =(6.7 0.80.9)%, and B(-+- (n0,n>0)) =(6.10.80.9)%. The total branching fraction to one charged pion plus at least one neutral hadron is measured to be (37.81.21.0)%. Limits on allowed decay modes involving the meson are discussed. © 1987 The American Physical Society.
- Published
- 1987
25. Diffraction Dissociation in 205 GeV/c π−p Interactions
- Author
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F.C. Winkelmann, B. Y. Daugéras, G. S. Abrams, D.M. Chew, G.P. Yost, A.D. Johnson, Wesley M. Smart, W.R. Graves, G. H. Trilling, Gerson Goldhaber, L. Stutte, F. R. Huson, H.H. Bingham, J.A. Kadyk, D. Bogert, C. Pascaud, D. Ljung, S. M. Pruss, W.B. Fretter, R. Hanft, and C.E. Friedberg
- Subjects
Physics ,Nuclear physics ,Diffraction ,Pion ,Nuclear Theory ,High Energy Physics::Experiment ,Nuclear Experiment ,Dissociation (chemistry) - Abstract
Pion and proton diffraction dissociation are observed in π−p interactions at 205 GeV/c. The 2‐ and 4‐prong final states show evidence for N* and A1 production. Pion diffraction into masses up to ∼ 6 GeV is observed in the inclusive reaction π−p ⇒ p + X.
- Published
- 1973
- Full Text
- View/download PDF
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