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1. PRODUCTION OF NEUTRAL STRANGE PARTICLES IN MUON-NUCLEON SCATTERING AT 490 GEV

Author

H. J. Gebauer, J. F. Bartlett, M. Wilhelm, I. Derado, S. Krzywdzinski, H. E. Stier, Jan Figiel, S. Wolbers, W. Mohr, P. L. Anthony, S. Aïd, M. Erdmann, Jim Hanlon, S. Magill, M. D. Baker, Henry Lubatti, H. M. Braun, H. J. Seyerlein, S. K. Dhawan, Shuichi Kunori, G. A. Snow, M. Aderholz, D. E. Jaffe, D. Hantke, L.S. Osborne, K. Dziunikowska, S. O'Day, A. Manz, Michael Schmitt, G. Jancso, A. Röser, K. Kadija, F. M. Pipkin, A. Salvarani, U. Ecker, Mark Raymond Adams, S. Tentindo-Repond, D. McLeod, H. E. Jackson, D. G. Michael, R. L. Talaga, P. Malecki, Andris Skuja, J. J. Ryan, J. Wilkes, P. Stopa, Ronald Gilman, R. D. Kennedy, V. Eckardt, H. E. Montgomery, Norbert Schmitz, V. W. Hughes, C. W. Salgado, V. Papavassiliou, M. C. Green, D. F. Geesaman, T. Dreyer, H. J. Trost, Janet Conrad, Jorge G. Morfin, Wit Busza, H. Venkataramania, J. Haas, G. Coutrakon, C. Halliwell, S. Söldner-Rembold, Tiefu Zhao, S. B. Kaufman, A. A. Bhatti, K. Olkiewicz, R. B. Nickerson, A. Eskreys, R. A. Swanson, P. H. Steinberg, H. Schellman, J. J. Lord, W. Dougherty, D. M. Jansen, K. P. Schüler, E. J. Ramberg, T. Kirk, H. L. Melanson, B. Pawlik, Richard Wilson, R. Davisson, W. Wittek, and H. G. E. Kobrak

Subjects
Quantum chromodynamics, Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Multiplicity (mathematics), Elementary particle, Strangeness, Lambda, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Engineering (miscellaneous)
Abstract

The production of K0, Λ and {Mathematical expression} particles is studied in the E665 muon-nucleon experiment at Fermilab. The average multiplicities and squared transverse momenta are measured as a function of xF and W2. Most features of the data can be well described by the Lund model. Within this model, the data on the K0/π± ratios and on the average K0 multiplicity in the forward region favor a strangeness suppression factor s/u in the fragmentation process near 0.20. Clear evidence for QCD effects is seen in the average squared transverse momentum of K0 and Λ particles. © 1994 Springer-Verlag.

Published
2016

2. DENSITY AND CORRELATION INTEGRALS IN DEEP-INELASTIC MUON-NUCLEON SCATTERING AT 490 GEV

Author

M. Wilhelm, G. A. Snow, D. E. Jaffe, R. Davisson, S. Aïd, F. M. Pipkin, H. E. Stier, Richard Wilson, W. Dougherty, H. Venkataramania, Norbert Schmitz, W. Wittek, Henry Lubatti, A. Manz, R. L. Talaga, S. O'Day, K. Kadija, Wit Busza, H. G. E. Kobrak, Shuichi Kunori, K. Dziunikowska, L.S. Osborne, K. Olkiewicz, D. G. Michael, Andris Skuja, M. R. Adams, Pa. Malecki, J. Wilkes, H. J. Gebauer, R. B. Nickerson, R. D. Kennedy, J. F. Bartlett, B. Pawlik, I. Derado, V. Eckardt, D. F. Geesaman, A. Salvarani, H. E. Montgomery, E. J. Ramberg, Martin Erdmann, U. Ecker, Jorge G. Morfin, M. C. Green, W. Mohr, Janet Conrad, J. J. Lord, V. Papavassiliou, H. J. Trost, S. Krzywdzinski, A. A. Bhatti, D. McLeod, G. Jancso, Michael Schmitt, Satish Dhawan, C. Halliwell, S. Tentindo-Repond, H. L. Melanson, Jan Figiel, D. M. Jansen, A. Röser, Ronald Gilman, H. E. Jackson, Jim Hanlon, V. W. Hughes, H. M. Braun, S. Wolbers, S. Magill, C. W. Salgado, P. Stopa, J. J. Ryan, M. D. Baker, K. P. Schüler, D. Hantke, F. Botterweck, A. Eskreys, R. A. Swanson, P. H. Steinberg, H. Schellman, T. Kirk, H. J. Seyerlein, T. Dreyer, J. Haas, P.L. Anthony, G. Coutrakon, S. Söldner-Rembold, Tiefu Zhao, and S. B. Kaufman

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Scattering, Hadron, Tevatron, Deep inelastic scattering, law.invention, Nuclear physics, law, Intermittency, High Energy Physics::Experiment, Fermilab, Nucleon
Abstract

Results on density integrals Fq(Q2) and correlation integrals Kq(Q2) are presented for the first time in muon-nucleon scattering at ∼ 490 GeV, using data from the E665 experiment at the Tevatron of Fermilab. A clear rise of the Fq integrals with decreasing size of the phase-space cells (“intermittency”) is observed for pairs and triplets of negative hadrons whereas the effect is much weaker for mixed charge combinations. From these findings it is concluded that the observed intermittency signal is mainly caused by Bose-Einstein interference. Furthermore, no energy (W) dependence of F2(Q2) is observed within the W range of the E665 experiment. Finally, the third-order correlation integrals K3(Q2) are found to be significantly different from zero which implies the presence of genuine three-particle correlations in muon-nucleon interactions.

Published
2016

3. A spectrometer for muon scattering at the Tevatron

Author

A. Eskreys, J. Wilkes, P. H. Steinberg, A. Salvarani, S. Söldner-Rembold, M. Vidal, S. A. Wolbers, L. S. Osborne, S. K. Dhawan, A. A. Bhatti, A. Röser, K. P. Schüler, D. G. Michael, D. M. Jansen, D. McLeod, Andris Skuja, C. Halliwell, P. Stopa, U. Ecker, H. E. Stier, B. Pawlik, S. B. Kaufman, M. Erdmann, G. Jancso, R. D. Kennedy, T. Kirk, H. Venkataramania, T. Lyons, H. M. Braun, P. Strube, E. Sexton, J. Hanlon, H. J. Gebauer, V. Eckardt, Michael Schmitt, S. Tentindo-Repond, Shuichi Kunori, H. E. Montgomery, T. Dreyer, Robert A. Swanson, Ronald Gilman, R. Davisson, P. L. Anthony, H. L. Melanson, F. M. Pipkin, Jorge G. Morfin, J. Haas, John P. Ryan, Richard Wilson, T. Burnett, M. D. Baker, H. J. Seyerlein, M. C. Green, S. O'Day, M. Wilhelm, A. M. Osborne, H. J. Trost, Janet Conrad, W. Dougherty, P. Malecki, H. Kobrak, E. J. Ramberg, G. Coutrakon, Tianchi Zhao, Wit Busza, V. W. Hughes, R. B. Nickerson, D. F. Geesaman, Mark Raymond Adams, R. L. Talaga, S. Magill, S. Aïd, A. Manz, Henry Lubatti, K. Eskreys, H. E. Jackson, J. F. Bartlett, W. Mohr, S. Krzywdzinski, and J. Lord

Subjects
Physics, Nuclear and High Energy Physics, Wire chamber, Particle physics, Muon, Spectrometer, Physics::Instrumentation and Detectors, Scattering, Tevatron, Particle detector, Particle identification, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Instrumentation, Fermi Gamma-ray Space Telescope
Abstract

In this paper the spectrometer constructed by the E665 Collaboration is described. The spectrometer was built during the period 1982–87 and the first data were taken during the 1987–88 Fixed Target run of the Fermi National Accelerator Laboratory (FNAL) Tevatron. This is the first of a series of runs in which a comprehensive program of high energy muon scattering experiments will be performed.

Published
2016

4. Diffractive production of rho(0)(770) mesons in muon-proton interactions at 470 GeV

Author

P. L. Anthony, Janet Conrad, H. E. Jackson, Timothy J. Carroll, D. McLeod, W. Wittek, C. W. Salgado, J. Novak, U. Ecker, H. L. Clark, J. J. Ryan, H. G. E. Kobrak, B. Pawlik, G. Jancso, Tiefu Zhao, S. Kaufmann, R. B. Nickerson, B. Baller, P. Stopa, R. D. Kennedy, U. Bratzler, M. D. Baker, R. A. Swanson, R. S. Guo, Martin Erdmann, M. Aderholz, A. Röser, A. Zghiche, A. Banerjee, H. Schellman, D. Hantke, K. Hicks, P. Spentzouris, I. Derado, P. Madden, F. M. Pipkin, S. Aïd, A. Manz, R. Otten, R. W. Finlay, G. Siegert, S. Magill, K. Kadija, G. A. Snow, S. Söldner-Rembold, D. M. Jansen, Andris Skuja, F. S. Dietrich, M. Wilhelm, T. Dreyer, K. P. Schüler, D. G. Michael, K. Olkiewicz, Mark Raymond Adams, G. P. Zeller, V. Papavassiliou, V. Eckardt, J. Haas, H. E. Montgomery, G. Y. Fang, Henry Lubatti, A. A. Bhatti, D. E. Jaffe, Z. Jin, Jorge G. Morfin, Jan Figiel, C. Halliwell, Shuichi Kunori, R. Davisson, S. Wolbers, H. M. Braun, W. Dougherty, Richard Wilson, L.S. Osborne, K. A. Griffioen, D. F. Geesaman, H. Venkataramania, E. R. Kinney, J. J. Lord, D. A. Averill, H. J. Gebauer, D. H. Potterveld, Michael Schmitt, Norbert Schmitz, A. V. Kotwal, and H. L. Melanson

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Meson, Proton, Extrapolation, Virtual particle, Helicity, Nuclear physics, Mass spectrum, High Energy Physics::Experiment, Fermilab, Nuclear Experiment
Abstract

The diffractive production of ρ0(770 @#@) mesons in muon-proton interactions is studied in the kinematic region 0.15 GeV2 < Q2 < 20 GeV2 and 20 GeV < ? < 420 GeV. The data were obtained in the Fermilab fixed-target experiment E665 with primary muons of 470 GeV energy. Results are presented on the Q2, x and ? dependence of the cross section, on the shape of the ρ+ρt - mass spectrum, on the slope of the diffraction peak and on the production and decay angular distributions of the ρ0(770). The cross section for diffractive production of ρ0 by virtual photons on protons depends mainly on Q2. At fixed Q2, no significant dependence on x or ? is observed. The extrapolation to Q2 = 0 yields a photoproduction cross section of (10.30 ± 0.33) μb. The slope of the t′ distribution has a value of (7.0 ± 0.2) GeV−2, with a tendency to decrease as Q2 increases. The production and decay angular distributions of the ρ0 depend strongly on Q2 and are consistent with s-channel helicity conservation. The ratio R = σ l /σ t deduced from the decay angular distributions rises strongly with Q2, passing the value of 1 at Q2 ≈ 2 GeV2.

Published
2016

5. NUCLEAR SHADOWING, DIFFRACTIVE SCATTERING AND LOW MOMENTUM PROTONS IN MU-XE INTERACTIONS AT 490-GEV

Author

H. E. Stier, F. M. Pipkin, G. Coutrakon, Jim Hanlon, H. M. Braun, K. Kadija, K. Olkiewicz, A. Salvarani, Henry Lubatti, D. G. Michael, G. Jancso, P. Malecki, M. Wilhelm, S. Krzywdzinski, W. Wittek, A. Eskreys, M. Erdmann, H. G. E. Kobrak, Andris Skuja, R. A. Swanson, P. L. Anthony, P. H. Steinberg, T. Dreyer, Jan Figiel, S. Aïd, S. Wolbers, V. W. Hughes, J. F. Bartlett, C. Halliwell, M. C. Green, H. J. Trost, I. Derado, L.S. Osborne, P. Stopa, U. Ecker, M. D. Baker, C. W. Salgado, R. D. Kennedy, W. Mohr, J. Haas, B. Pawlik, D. Hantke, R. B. Nickerson, Shuichi Kunori, S. Söldner-Rembold, D. E. Jaffe, Mark Raymond Adams, Ronald Gilman, H. J. Seyerlein, Tiefu Zhao, V. Eckardt, R. L. Talaga, S. O'Day, D. F. Geesaman, H. E. Montgomery, S. Magill, T. Kirk, H. Schellman, S. B. Kaufman, H. E. Jackson, Janet Conrad, V. Papavassiliou, R. Davisson, Timothy J. Carroll, H. L. Melanson, E. J. Ramberg, Jorge G. Morfin, D. M. Jansen, S. K. Dhawan, M. Aderholz, A. Röser, J. Wilkes, A. A. Bhatti, H. Venkataramania, J. J. Ryan, K. P. Schüler, Richard Wilson, A. Manz, K. Dziunikowska, D. McLeod, G. A. Snow, Michael Schmitt, S. Tentindo-Repond, J. J. Lord, W. Dougherty, H. J. Gebauer, Norbert Schmitz, and Wit Busza

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Spectrometer, Scattering, Hadron, Tevatron, Elementary particle, Nuclear physics, Particle acceleration, Rapidity, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Engineering (miscellaneous)
Abstract

The production of charged hadrons is studied in μXe and μD interactions at 490 GeV beam energy. The data were taken at the Tevatron at Fermilab with the E665 spectrometer, equipped with a streamer chamber as vertex detector. Differences between the μXe and μD data are explained by cascading of hadrons in the Xe nucleus. The average multiplicity of charged hadrons in μXe scattering is compared to previously published pXe scattering data and is found to be strongly reduced. This is traced back to the low number of ‘projectile’ collisions in μXe interactions. From a study of thex Bj dependence of hadron production in μXe scattering, and by considering events with a large rapidity gap, evidence is found for a significant contribution of diffractive scattering, which is enhanced in the kinematic region where shadowing of the cross section is observed. This result supports recent models in which diffractive scattering and nuclear shadowing are closely related.

Published
2016

6. Inclusive single-particle distributions and transverse momenta of forward produced charged hadrons in $\mu p$ scattering at 470 GeV

Author

R. S. Guo, S. Aïd, P. Stopa, R. D. Kennedy, A. Zghiche, Z. Jin, G. A. Snow, S. Söldner-Rembold, I. Derado, A. Manz, Janet Conrad, H. L. Melanson, H. M. Braun, Andris Skuja, M. Aderholz, H. E. Jackson, Roger W. Finlay, Timothy J. Carroll, E. R. Kinney, J. J. Lord, F. M. Pipkin, D. G. Michael, M. D. Baker, B. Baller, A. Röser, V. Eckardt, H. E. Montgomery, Richard Wilson, D. A. Averill, D. Hantke, W. Wittek, K. Hicks, Jorge G. Morfin, J. Novak, F. S. Dietrich, H. G. E. Kobrak, D. McLeod, H. Venkataramania, V. Papavassiliou, W. Dougherty, K. A. Griffioen, G. Siegert, G. Jancso, P. Spentzouris, A. Banerjee, S. Magill, Michael Schmitt, D. H. Potterveld, B. Pawlik, S. Kaufmann, L.S. Osborne, H. J. Gebauer, M. Wilhelm, D. E. Jaffe, M. R. Adams, Shuichi Kunori, R. Davisson, K. P. Schüler, A. V. Kotwal, C. Halliwell, U. Ecker, U. Bratzler, N. Schmitz, R. A. Swanson, H. Schellman, A. A. Bhatti, H. L. Clark, J. J. Ryan, D. F. Geesaman, S. Wolbers, K. Olkiewicz, C. W. Salgado, Jan Figiel, Tiefu Zhao, R. B. Nickerson, R. Otten, T. Dreyer, J. Haas, P.L. Anthony, Martin Erdmann, G. Y. Fang, P. Madden, D. M. Jansen, J. Seyerlein, and Henry Lubatti

Subjects
Physics, Diffraction, Particle physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Momentum transfer, Hadron, Nuclear physics, Transverse plane, symbols.namesake, symbols, Feynman diagram, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Particle Physics - Experiment
Abstract

Using data from the Fermilab fixed target experiment E665, general properties of forward produced charged hadrons in μp interactions at a primary muon energy of 470 GeV are investigated. The normalized inclusive single-particle distributions for Feynman-x D(xF) and for the transverse momentum D(pt2, xF) are measured as a function of W and Q2. The dependence of the average transverse momentum squared 〈pt2〉 on xF, W and Q2 is studied. The increasing contribution from diffractive production as Q2 decreases leads to a reduction of the average charged hadron multiplicities at low (positive) xF and an enhancement at large xF, for Q2 ≲ 10 GeV2. It also reduces 〈pt2〉 for Q2 ≲ 5 GeV2 and 0.4 ≲ xF < 1.0. © Springer-Verlag 1997.

Published
1997

7. Rotational autoionization and energy levels of triplet nf, v=0 Rydberg states ofH2s

Author

M. D. Lindsay and F. M. Pipkin

Subjects
Physics, Quantum number, Atomic and Molecular Physics, and Optics, symbols.namesake, Autoionization, Polarizability, Metastability, Rydberg formula, symbols, Physics::Atomic Physics, Singlet state, Atomic physics, Ionization energy, Energy (signal processing)
Abstract

We have measured the energy levels and purely rotational autoionization rates of 25 different triplet Rydberg states of the ${\mathrm{H}}_{2}$ molecule with quantum numbers n=14--29, L=3, v=0, and R=2--4. Electron impact excites the ground-state molecules in a beam to the metastable c(2p)${\mathrm{}}^{3}$ ${\mathrm{\ensuremath{\Pi}}}_{\mathrm{u}}$ states. Two-color laser excitation from two counterpropagating single-mode cw dye laser beams excites the metastable molecules through an intermediate (3d)${\mathrm{}}^{3}$ \ensuremath{\Sigma} or (3d)${\mathrm{}}^{3}$ \ensuremath{\Pi} state to the triplet nf Rydberg states. The linewidths of the transitions to the Rydberg states give the autoionization rates, which vary widely and agree satisfactorily with the quadrupole-moment-polarizability long-range Coulomb interaction model. The laser transitions have been measured to 0.002 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ . We use these measurements, the model, and an extrapolation of the Rydberg series to derive the ionization potential of the metastable c(2p)${\mathrm{}}^{3}$ ${\mathrm{\ensuremath{\Pi}}}_{\mathrm{u}}$ v=0 states with an accuracy of 0.020 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ and the energy difference between the singlet ground state and the triplet metastable c(2p)${\mathrm{}}^{3}$ ${\mathrm{\ensuremath{\Pi}}}_{\mathrm{u}}$ states with an accuracy of 0.025 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ . This allows the whole singlet and triplet manifolds of ${\mathrm{H}}_{2}$ to be linked together with higher accuracy: our correction to Dieke's ${\mathrm{H}}_{2}$ triplet term values is -149.704(25) ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ .

Published
1997

8. Proton and deuteron structure functions in muon scattering at 470 GeV

Author

Michael Schmitt, Andris Skuja, V. Eckardt, H. E. Montgomery, A. Manz, A. Zghiche, Richard Wilson, Jan Figiel, S. Söldner-Rembold, Tiefu Zhao, G. Siegert, V. Papavassiliou, F. M. Pipkin, F. S. Dietrich, R. W. Finlay, S. Magill, L.S. Osborne, R. Otten, Henry Lubatti, S. B. Kaufman, Norbert Schmitz, A. A. Bhatti, B. Baller, H. L. Melanson, K. Olkiewicz, T. Dreyer, R. A. Swanson, C. Halliwell, R. B. Nickerson, M. Erdmann, H. J. Gebauer, M. D. Baker, H. Schellman, R. Davisson, Janet Conrad, Jorge G. Morfin, J. Haas, H. E. Jackson, Timothy J. Carroll, D. H. Potterveld, W. Dougherty, B. Pawlik, K. A. Griffioen, D. Hantke, G. Y. Fang, S. Wolbers, P. Spentzouris, J. Novak, D. G. Michael, G. A. Snow, W. Wittek, U. Ecker, A. Röser, Shuichi Kunori, H. G. E. Kobrak, E. J. Ramberg, H. M. Braun, D. McLeod, P. Madden, H. L. Clark, E. R. Kinney, C. W. Salgado, D. M. Jansen, Mark Raymond Adams, J. J. Lord, D. A. Averill, A. Banerjee, D. F. Geesaman, G. Jancso, A. V. Kotwal, P. L. Anthony, S. O'Day, M. Wilhelm, D. E. Jaffe, R. S. Guo, J. J. Ryan, S. Aïd, U. Bratzler, K. Hicks, P. Stopa, R. D. Kennedy, H. E. Stier, H. Venkataramania, A. Salvarani, Z. Jin, and I. Derado

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Muon, Proton, Scattering, Hadron, High Energy Physics::Experiment, HERA, Atomic physics, Connection (algebraic framework), Twist, Inelastic scattering
Abstract

The proton and deuteron structure functions F2 p and F2 d are measured in inelastic muon scattering with an average beam energy of 470 GeV. The data were taken at Fermilab experiment E665 during 1991 and 1992 using liquid hydrogen and deuterium targets. The F2 measurements are reported in the range 0.0008

Published
1996

9. Extraction of the RatioF2n/F2pfrom Muon-Deuteron and Muon-Proton Scattering at SmallxandQ2

Author

Andris Skuja, G. Siegert, R. Davisson, G. Y. Fang, V. Eckardt, H. E. Montgomery, F. M. Pipkin, A. Banerjee, A. Salvarani, D. G. Michael, W. Dougherty, P. Spentzouris, Henry Lubatti, G. A. Snow, M. Wilhelm, R. S. Guo, S. Aïd, T. Dreyer, V. Papavassiliou, D. McLeod, S. O'Day, K. A. Griffioen, Jan Figiel, H. E. Jackson, K. P. Schüler, E. J. Ramberg, S. Magill, M. D. Baker, B. Baller, H. J. Gebauer, J. J. Ryan, I. Derado, J. Haas, W. Wittek, L.S. Osborne, M. R. Adams, D. Hantke, M. Erdmann, Z. Jin, A. Manz, D. E. Jaffe, A. Zghiche, Roger W. Finlay, H. G. E. Kobrak, R. A. Swanson, H. Schellman, G. Jancso, K. Olkiewicz, A. Röser, Richard Wilson, K. Hicks, H. L. Melanson, P. L. Anthony, S. Söldner-Rembold, Shuichi Kunori, U. Bratzler, H. E. Stier, R. B. Nickerson, N. Schmitz, P. Madden, H. L. Clark, Tiefu Zhao, Michael Schmitt, B. Pawlik, D. H. Potterveld, D. M. Jansen, A. V. Kotwal, R. D. Kennedy, U. Ecker, E. R. Kinney, J. J. Lord, R. Otten, S. B. Kaufman, D. A. Averill, S. Wolbers, H. M. Braun, P. Stopa, Satish Dhawan, C. Halliwell, D. F. Geesaman, V. W. Hughes, C. W. Salgado, Janet Conrad, Timothy J. Carroll, Jorge G. Morfin, J. Novak, H. Venkataramania, F. S. Dietrich, and A. A. Bhatti

Subjects
Nuclear physics, Physics, Muon, Deuterium, Proton, Scattering, Proton scattering, Structure function, Analytical chemistry, General Physics and Astronomy
Abstract

The ratio of the deuteron to proton structure functions is measured at very small Bjorken {ital x} (down to 10{sup --6}) and for {ital Q}{sup 2}{gt}0.001 GeV{sup 2} from scattering of 470 GeV muons on liquid hydrogen and deuterium targets. The ratio {ital F}{sup {ital n}}{sub 2}/{ital F}{sup {ital p}}{sub 2} extracted from these measurements is found to be constant, at a value of 0.935{plus_minus}0.008{plus_minus}0.034, for {ital x}{lt}0.01. This result suggests the presence of nuclear shadowing effects in the deuteron. The dependence of the ratio on {ital Q}{sup 2} is also examined; no significant variation is found.

Published
1995

10. Measurement of Nuclear Transparencies from Exclusiveρ0Meson Production in Muon-Nucleus Scattering at 470 GeV

Author

S. Lancaster, R. A. Swanson, H. Schellman, M. Wilhelm, M. Erdmann, R. S. Guo, K. P. Schüler, G. A. Snow, R. D. Kennedy, T. Kirk, A. Banerjee, V. Papavassiliou, W. Wittek, Shuichi Kunori, A. A. Bhatti, H. E. Stier, S. Aïd, Janet Conrad, Timothy J. Carroll, B. Pawlik, Roger W. Finlay, Satish Dhawan, D. F. Geesaman, C. Halliwell, F. M. Pipkin, K. Hicks, Richard Wilson, H. G. E. Kobrak, F. Faller, U. Bratzler, V. W. Hughes, T. Zhao, D. McLeod, C. W. Salgado, D. G. Michael, H. L. Melanson, P. Spentzouris, A. Salvarani, N. Schmitz, Michael Schmitt, D. H. Potterveld, S. Wolbers, E. R. Kinney, J. J. Lord, B. Baller, S. Magill, J. J. Ryan, Andris Skuja, A. Röser, H. Venkataramania, F. S. Dietrich, Z. Jin, Jorge G. Morfin, D. A. Averill, A. V. Kotwal, R. Davisson, S. O'Day, W. Dougherty, V. Eckardt, H. E. Montgomery, K. A. Griffioen, H. E. Jackson, H. J. Gebauer, G. Y. Fang, I. Derado, H. M. Braun, P. Stopa, A. Manz, S. Söldner-Rembold, M. D. Baker, D. Hantke, G. Siegert, Wit Busza, H. Breidung, R. Otten, S. B. Kaufman, T. Dreyer, L.S. Osborne, M. R. Adams, E. J. Ramberg, J. Haas, P. Madden, H. L. Clark, D. M. Jansen, Henry Lubatti, A. Zghiche, G. Jancso, P. L. Anthony, R. B. Nickerson, K. Olkiewicz, Jan Figiel, and U. Ecker

Subjects
Physics, Nuclear reaction, Particle physics, Muon, Meson, Physics::Instrumentation and Detectors, Scattering, Nuclear Theory, Tevatron, General Physics and Astronomy, Nuclear physics, Deuterium, Nuclear transparency, Physics::Accelerator Physics, High Energy Physics::Experiment, Fermilab, Nuclear Experiment
Abstract

Nuclear transparencies measured in exclusive incoherent ${\mathrm{\ensuremath{\rho}}}^{0}$ meson production from hydrogen, deuterium, carbon, calcium, and lead in muon-nucleus scattering are reported. The data were obtained with the E665 spectrometer using the Fermilab Tevatron muon beam with a mean beam energy of 470 GeV. Increases in the nuclear transparencies are observed as the virtuality of the photon increases, in qualitative agreement with the expectations of color transparency.

Published
1995

11. Scaled energy (z) distributions of charged hadrons observed in deep-inelastic muon scattering at 490 GeV from xenon and deuterium targets

Author

S. Magill, A. Eskreys, W. Wittek, B. Pawlik, R. A. Swanson, P. H. Steinberg, H. Venkataramania, H. Schellman, M. Wilhelm, S. Wolbers, H. G. E. Kobrak, H. M. Braun, U. Ecker, P. Malecki, Ronald Gilman, W. Dougherty, M. D. Baker, S. Krzywdzinski, S. Aïd, R. L. Talaga, Satish Dhawan, C. Halliwell, D. Hantke, N. Schmitz, Shuichi Kunori, G. A. Snow, J. Wilkes, A. Salvarani, D. G. Michael, Jim Hanlon, D. F. Geesaman, S. Söldner-Rembold, R. Davisson, Jorge G. Morfin, H. E. Jackson, T. Kirk, V. Papavassiliou, K. Dziunikowska, F. M. Pipkin, M. C. Green, A. A. Bhatti, H. L. Melanson, V. W. Hughes, H. J. Trost, Richard Wilson, G. Coutrakon, A. Manz, S. O'Day, Wit Busza, Janet Conrad, H. J. Seyerlein, Timothy J. Carroll, H. E. Stier, Andris Skuja, J. F. Bartlett, I. Derado, W. Mohr, Michael Schmitt, S. Tentindo-Repond, A. Röser, V. Eckardt, H. E. Montgomery, H. J. Gebauer, D. McLeod, T. Dreyer, L.S. Osborne, M. Vidal, M. R. Adams, J. J. Ryan, J. Haas, P.L. Anthony, Tiefu Zhao, E. J. Ramberg, Martin Erdmann, S. B. Kaufman, D. M. Jansen, D. E. Jaffe, K. P. Schüler, P. Stopa, R. D. Kennedy, Henry Lubatti, G. Jancso, J. J. Lord, K. Olkiewicz, R. B. Nickerson, and Jan Figiel

Subjects
Physics, Nuclear reaction, Particle physics, Muon, Scattering, Computer Science::Information Retrieval, Momentum transfer, Hadron, Inelastic scattering, Deep inelastic scattering, Nuclear physics, Deuterium, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Fermilab Experiment-665 measured deep-inelastic scattering of 490 GeV muons off deuterium and xenon targets. Events were selected with a range of energy exchange [nu] from 100 GeV to 500 GeV and with large ranges of [ital Q][sup 2] and [ital x][sub Bj]: 0.1 GeV[sup 2]/[ital c][sup 2][lt][ital Q][sup 2][lt]150 GeV[sup 2]/[ital c][sup 2] and 0.001[lt][ital x][sub Bj][lt]0.5. The fractional energy ([ital z]) distributions of forward-produced hadrons from the two targets have been compared as a function of the kinematics of the scattering; specifically, the kinematic region of shadowing'' has been compared to that of nonshadowing. The dependence of the distributions upon the [ital order] of the hadrons, determined by the fractional energies, has been examined as well; a strong degree of similarity has been observed in the shapes of the distributions of the different order hadrons. These [ital z] distributions, however, show no nuclear dependence, even in the kinematic region of shadowing.

Published
1994

13. Q2dependence of the average squared transverse energy of jets in deep-inelastic muon-nucleon scattering with comparison to perturbative QCD predictions

Author

W. Wittek, H. Venkataramania, H. G. E. Kobrak, Jim Hanlon, G. A. Snow, S. Krzywdzinski, D. M. Jansen, S. Söldner-Rembold, Shuichi Kunori, Henry Lubatti, S. Arndotïd, B. Pawlik, D. F. Geesaman, Satish Dhawan, C. Halliwell, D. G. Michael, S. Wolbers, G. Coutrakon, Jorge G. Morfin, Jan Figiel, H. L. Melanson, V. W. Hughes, J. Wilkes, U. Ecker, P. Malecki, M. D. Baker, F. M. Pipkin, E. J. Ramberg, Martin Erdmann, H. M. Braun, H. J. Gebauer, W. Dougherty, A. Manz, V. Papavassiliou, L.S. Osborne, C. W. Salgado, H. E. Jackson, Andris Skuja, M. R. Adams, T. Kirk, H. E. Stier, D. Hantke, R. B. Nickerson, K. Dziunikowska, Ronald Gilman, D. E. Jaffe, V. Eckardt, S. O'Day, G. Jancso, N. Schmitz, H. E. Montgomery, A. Eskreys, M. Wilhelm, R. Davisson, R. A. Swanson, P. H. Steinberg, H. Schellman, R. L. Talaga, J. J. Ryan, S. Magill, M. C. Green, D. McLeod, K. Olkiewicz, Michael Schmitt, S. Tentindo-Repond, A. Salvarani, H. J. Trost, A. A. Bhatti, Janet Conrad, T. Dreyer, J. F. Bartlett, K. P. Schüler, A. Röser, I. Derado, J. J. Lord, W. Mohr, J. Haas, P.L. Anthony, Wit Busza, Tiefu Zhao, Richard Wilson, S. B. Kaufman, P. Stopa, and R. D. Kennedy

Subjects
Physics, Quantum chromodynamics, Particle physics, Muon, Computer Science::Information Retrieval, Momentum transfer, General Physics and Astronomy, Perturbative QCD, Parton, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

The average squared transverse energy of jets in deep-inelastic muon-nucleon scattering is measured as a function of the momentum transfer squared ([ital Q][sup 2]), in the range 3[lt][ital Q][sup 2][lt]25 GeV[sup 2]. Perturbative QCD predicts that the average squared parton transverse energy will depend upon the strong coupling constant ([alpha][sub [ital S]]). Identifying the transverse energy of the jets with those of the corresponding partons, [alpha][sub [ital S]] is found to vary with [ital Q][sup 2] as predicted by QCD.

Published
1994

14. Perturbative QCD effects observed in 490 GeV deep-inelastic muon scattering

Author

K. P. Schüler, S. Aïd, Norbert Schmitz, D. F. Geesaman, U. Ecker, M. Erdmann, Mark Raymond Adams, K. Olkiewicz, K. Dziunikowska, R. L. Talaga, T. Kirk, P. L. Anthony, Pa. Malecki, Wit Busza, M. D. Baker, Ronald Gilman, H. J. Trost, B. Pawlik, S. Krzywdzinski, H. J. Gebauer, H. L. Melanson, A. Eskreys, S. O'Day, D. McLeod, Shuichi Kunori, R. A. Swanson, P. H. Steinberg, H. Schellman, Jan Figiel, R. Davisson, J. J. Lord, H. E. Stier, Jorge G. Morfin, D. G. Michael, F. M. Pipkin, E. J. Ramberg, S. Wolbers, S. Magill, R. D. Kennedy, V. Papavassiliou, D. E. Jaffe, R. B. Nickerson, W. Dougherty, D. M. Jansen, Michael Schmitt, C. Halliwell, L. S. Osborne, V. W. Hughes, C. W. Salgado, J. Wilkes, S. K. Dhawan, A. Röser, Richard Wilson, H. Venkataramania, A. A. Bhatti, A. Manz, A. Salvarani, D. Hantke, Andris Skuja, V. Eckardt, G. A. Snow, H. E. Montgomery, Janet Conrad, G. Coutrakon, J. J. Ryan, T. Dreyer, J. Haas, H. M. Braun, P. Stopa, S. Söldner-Rembold, Tiefu Zhao, M. C. Green, S. B. Kaufman, H. E. Jackson, W. Wittek, H. G. E. Kobrak, J. F. Bartlett, G. Jancso, I. Derado, S. Tentindo-Repond, W. Mohr, Jim Hanlon, Henry Lubatti, and M. Wilhelm

Subjects
Quantum chromodynamics, Physics, Particle physics, Muon, Computer Science::Information Retrieval, High Energy Physics::Phenomenology, Hadron, Perturbative QCD, Elementary particle, Parton, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Results on forward charged hadrons in 490 GeV deep-inelastic muon scattering are presented. The transverse momenta, azimuthal asymmetry, and energy flow of events with four or more forward charged hadrons are studied. The range of the invariant hadronic mass squared 300[lt][ital W][sup 2][lt]900 GeV[sup 2]/[ital c][sup 4] extends higher than previous deep-inelastic muon scattering experiments. Data are compared to the predictions of the Lund Monte Carlo model with perturbative QCD simulated by matrix elements, parton showers, and color dipole radiation. All of the QCD-based models are consistent with the data while a model without QCD processes is not. Correlations with the multiplicity-independent event variable [Pi][congruent][summation][vert bar][ital p][sub [ital T]][vert bar] are studied. The relationship between the azimuthal asymmetry and transverse momentum of forward hadrons is also presented. The data are most consistent with intrinsic parton transverse momentum squared [ital k][sub [ital T]][sup 2] of 0.25 GeV[sup 2]/[ital c][sup 2].

Published
1993

15. A measurement of the tau lepton lifetime

Author

E. H. Thorndike, R. Ammar, F. M. Pipkin, D. Coppage, A. M. Halling, J. P. Alexander, K. Lingel, M. Sivertz, J. S. H. Lee, K. Sparks, Paul Sheldon, G. Zhu, Marina Artuso, Harris Kagan, M. Worris, H. Worden, R. S. Galik, J. S. Miller, S. Playfer, C. P. O'Grady, J. Wolinski, P. L. Wang, Ian Shipsey, F. Muheim, J. J. Whitmore, K. K. Gan, M. Thulasidas, P. Rubin, R. J. Morrison, Mats A Selen, J. L. Rodriguez, D. L. Kreinick, C. Bebek, H. Tajima, David Sperka, F. Morrow, A. J. Sadoff, S. R. Ro, Frank Würthwein, D. R. Johnson, D. L. Hartill, S. Menary, H. N. Nelson, Paul Wilson, R. Ehrlich, D. Xiao, Daniel Schmidt, Paul Avery, N. B. Mistry, Z. Egyed, T. E. Browder, K. Honscheid, D. Z. Besson, D. Riley, M. Kelly, M. Daoudi, J. Mevissen, T. Liu, M. Modesitt, J. Dominick, J. Kandaswamy, N. Copty, A. Silverman, J. Gronberg, J. A. Ernst, H. P. Paar, R. Fulton, S. W. Gray, P. Skubic, W. M. Yao, A. P. Freyberger, T. Skwarnicki, D. Peterson, Elliott Cheu, Glen D. Crawford, J. D. Lewis, H. Yamamoto, P. C. Kim, J. Urheim, B. Ong, D. Perticone, Sheldon Stone, Shawn W. Henderson, M. Goldberg, D. M. Coffman, G. C. Moneti, R. Wang, Yoram Rozen, M. Lambrecht, E. Nordberg, X. Fu, D. F. Cowen, B. K. Heltsley, T. Miao, S.F. Schaffner, Cong Wang, B. Nemati, G. S. Ludwig, Daniela Bortoletto, Philip Baringer, J. Snow, M. Garcia-Sciveres, C. D. Jones, S. Ball, R. J. Wilson, Vipul Jain, M. Battle, A. J.R. Weinstein, John Yelton, N. Katayama, N. Hancock, Ryszard Stroynowski, D. S. Akerib, P. Rankin, G. Eigen, David Norvil Brown, Yuichi Kubota, John E. Bartelt, G.R. Kalbfleisch, M. Sapper, T. Jensen, J. K. Nelson, Soumitra Nandi, M. M. Zoeller, J. G. Smith, R. L. Malchow, Christopher G. White, C. R. Sun, W. T. Ford, R. D. Kass, Alice Bean, Raymond Davis, Wei Li, D. H. Miller, R. Stephens, S. E. Csorna, F. Butler, K. Kinoshita, Pu Wang, Darin Acosta, G. Masek, Juliet Ritchie Patterson, M. Procario, Horst Severini, E. I. Shibata, Hubert Kroha, C. R. Ng, Michael S. Witherell, M.K. Sung, N. Kwak, R. L. McIlwain, Alam, P. Haas, N. Horwitz, M. Chadha, A.V. Bernes, Robert K. Kutschke, M. Pisharody, Karl Berkelman, T. Letson, Ha Lam, J. D. Richman, V. Romero, M. Lattery, B. C. Barish, J. Masui, S. Schrenk, Mestayer, S. Roberts, D. G. Cassel, R. Poling, D. Cinabro, R. Kennett, B. Gittelman, I. J. Kim, P. S. Drell, M. Saulnier, B. Geiser, M. Lohner, and J. J. O'Neill

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Lepton
Published
1992

16. First measurements of jet production rates in deep-inelastic lepton-proton scattering

Author

John P. Ryan, H. E. Stier, Tiefu Zhao, D. Hantke, E. J. Ramberg, Martin Erdmann, F. M. Pipkin, H. Venkataramania, P. Stopa, Henry Lubatti, S. B. Kaufman, G. Coutrakon, R. D. Kennedy, A. Eskreys, A. Salvarani, T. Dreyer, K. Dziunikowska, R. A. Swanson, P. H. Steinberg, Jan Figiel, H. Schellman, U. Ecker, Jorge G. Morfin, H. J. Gebauer, P. L. Anthony, B. Pawlik, J. Haas, V. Papavassiliou, D. M. Jansen, G. Jancso, M. Vidal, J. J. Lord, W. Wittek, S. O'Day, Ronald Gilman, M. Wilhelm, A. A. Bhatti, R. B. Nickerson, D. F. Geesaman, M. R. Adams, K. P. Schüler, H. J. Seyerlein, G. A. Snow, M. C. Green, W. Mohr, S. Söldner-Rembold, W. Dougherty, Satish Dhawan, C. Halliwell, H. J. Trost, H. G. E. Kobrak, I. Derado, Jim Hanlon, R. Davisson, H. M. Braun, V. W. Hughes, J. Bartlett, S. Aïd, Shuichi Kunori, Wit Busza, R. L. Talaga, S. Krzywdzinski, S. Magill, S. Tentindo-Repond, J. M. Conrad, Richard Wilson, D. G. Michael, K. Olkiewicz, D. E. Jaffe, C. W. Salgado, H. E. Jackson, L.S. Osborne, S. Wolbers, A. Manz, Andris Skuja, V. Eckardt, H. E. Montgomery, D. McLeod, A. Röser, J. Wilkes, M. D. Baker, P. Malecki, and N. Schmitz

Subjects
Nuclear physics, Quantum chromodynamics, Physics, Particle physics, Muon, Scattering, General Physics and Astronomy, High Energy Physics::Experiment, Jet (particle physics), Inelastic scattering, Deep inelastic scattering, Energy (signal processing), Lepton
Abstract

The first measurements of forward multijet rates in deep-inelastic lepton scattering are presented. Data were taken with a 490-GeV muon beam incident on a hydrogen target. The jets were defined using the GADE algorithm. The measured rates are presented as a function of the jet resolution parameter {ital y}{sub cut}, and as a function of the virtual-photon--proton center-of-momentum energy {ital W}, in the range 13{le}{ital W}{le}33 GeV. Comparisons are made to the predictions of the Lund Monte Carlo programs and good agreement is obtained when QCD corrections are included in the model.

Published
1992

17. The CLEO II detector

Author

H. Worden, M. Lambrecht, B. Nemati, K. K. Gan, C. O'Grady, A. J. Weinstein, J. Urheim, Tomasz Skwarnicki, H. N. Nelson, Ian Shipsey, J. Mevissen, F. Morrow, D. Besson, R. DeSalvo, D. Perticone, N. Kwak, R. Fulton, J. Masui, J. Kandaswamy, E. Nordberg, Jeffrey Richman, T. E. Browder, G. S. Ludwig, Daniela Bortoletto, T. Letson, Juliet Ritchie Patterson, G. C. Moneti, Yoram Rozen, F. Würthwein, M. Pisharody, P. Lubrano, Karl Berkelman, P. Haas, M. Modesitt, P. Wilson, James Mueller, Barry C. Barish, G. Kalbfleisch, E. I. Shibata, Brian Heltsley, X. Fu, C. Bebek, Philip Baringer, D. M. Coffman, W. C. Li, J. P. Alexander, R. L. McIlwain, D. Peterson, W. Y. Chen, A. P. Freyberger, Vivek Jain, T. Jensen, P. Skubic, W. M. Yao, S. Schrenk, V. Sharma, D. L. Kreinick, R. Holmes, R. Ehrlich, T. Haupt, A. Jawahery, D. Coppage, Hubert Kroha, F. M. Pipkin, J. Wolinski, J. G. Smith, M. Daoudi, S. Ro, K. Sparks, Zuhe Bian, Ryszard Stroynowski, D. Xiao, J. Dominick, M. Sung, D. N. Brown, Alice Bean, D. Chen, C. R. Sun, W. T. Ford, R. D. Kass, H. Yamamoto, Ha Lam, M. Battle, P. Rankin, K. Honschoid, M. Worris, M. Sapper, J. S. Miller, David Miller, R. J. Morrison, Mats A Selen, M. Procario, R. S. Galik, P. Rubin, M. Thulasidas, S. E. Csorna, H. Tajima, A. J. Sadoff, J. Whitmore, R. T. Giles, Ian Brock, N. Katayama, Chunjie Wang, R. Kowalewski, Marina Artuso, Xinchou Lou, N. Horwitz, M. Chadha, M. S. Alam, D. S. Akerib, G. Eigen, P. Avery, Ron Poling, K. Kinoshita, R. Ammar, Daniel Schmidt, E. Blucher, D. L. Hartill, G. Zhu, Themistocles Bowcock, Persis S. Drell, R. Namjoshi, C. R. Ng, N. B. Mistry, B. Geiser, Sheldon Stone, P. N. Wang, D. F. Cowen, R. Davis, Elliott Cheu, P. C. Kim, S. Henderson, G. Crawford, C. D. Jones, Daniel Johnson, M. Lohner, F. Butler, R. Malchow, D. G. Cassel, John Yelton, M. Goldberg, M. L. Kelly, Jorge Luis Rodriguez, S. W. Gray, M. Saulnier, Richard Wilson, Harris Kagan, M. M. Zoeller, Murdock Gilchriese, M. S. Witherell, B. Gittelman, P. L. Wang, E. H. Thorndike, J. Snow, I. J. Kim, S. Nandi, D. Riley, S. F. Schaffner, Yuichi Kubota, Maurice Garcia-Sciveres, J. K. Nelson, and K. Lingel

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Physics::Instrumentation and Detectors, Detector, Hadron, Tracking (particle physics), Particle identification, Charged particle, Nuclear physics, CLEO, High Energy Physics::Experiment, Cornell Electron Storage Ring, Instrumentation
Abstract

The new detector for data recording by the CLEO collaboration at the Cornell Electron Storage Ring is described. This detector has been designed to optimize studying e+ e− annihilation into hadronic matter at a total energy of 10 GeV. It consists of high precesion charged particle tracking chambers and an electromagnetic calorimeter together with systems for particle identification. The design of the detector and its performance over the first year and a half of operation are presented.

Published
1992

18. Saturation of shadowing at very low Bjorkenx

Author

H. L. Melanson, B. Pawlik, S. Magill, M. Wilhelm, M. D. Baker, S. Aïd, D. Hantke, G. A. Snow, S. Söldner-Rembold, S. O'Day, Shuichi Kunori, Jorge G. Morfin, R. Davisson, Satish Dhawan, C. Halliwell, Tiefu Zhao, H. M. Braun, L.S. Osborne, V. Papavassiliou, D. G. Michael, M. R. Adams, S. Wolbers, U. Ecker, H. E. Jackson, H. J. Seyerlein, R. L. Talaga, H. Venkataramania, Richard Wilson, W. Wittek, F. M. Pipkin, Michael Schmitt, S. Tentindo-Repond, Ronald Gilman, Andris Skuja, H. G. E. Kobrak, A. Röser, D. M. Jansen, Jan Figiel, A. A. Bhatti, A. Eskreys, S. Krzywdzinski, R. A. Swanson, P. H. Steinberg, S. B. Kaufman, H. Schellman, H. E. Stier, Janet Conrad, J. J. Ryan, Timothy J. Carroll, E. J. Ramberg, V. Eckardt, Martin Erdmann, G. Jancso, H. E. Montgomery, K. Olkiewicz, M. C. Green, G. Coutrakon, T. Kirk, R. B. Nickerson, J. Wilkes, D. E. Jaffe, A. Salvarani, H. J. Trost, K. Dziunikowska, Wit Busza, A. Manz, K. P. Schüler, D. McLeod, H. J. Gebauer, T. Dreyer, J. Haas, P.L. Anthony, Henry Lubatti, M. Vidal, D. F. Geesaman, V. W. Hughes, P. Malecki, P. Stopa, R. D. Kennedy, N. Schmitz, W. Dougherty, J. J. Lord, Jim Hanlon, J. F. Bartlett, I. Derado, and W. Mohr

Subjects
Physics, Nuclear reaction, Muon, Physics::Instrumentation and Detectors, Scattering, General Physics and Astronomy, chemistry.chemical_element, Elementary particle, Inelastic scattering, Nuclear physics, Xenon, Deuterium, chemistry, Saturation (graph theory), Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment
Abstract

The ratio of cross sections for inelastic muon scattering on xenon and deuterium nuclei was measured at very low Bjorken {ital x} (0.000 02{lt}{ital x}{sub Bj}{lt}0.25). The data were taken at Fermilab experiment E-665 with a 490 GeV/{ital c} muon beam incident on liquid deuterium and gaseous xenon targets. Two largely independent analysis techniques gave statistically consistent results. The xenon-to-deterium per-nucleon cross-section ratio is constant at approximately 0.7 for {ital x}{sub Bj} below 0.003.

Published
1992

19. Ds+decays to ηρ+, η’ρ+, and φρ+

Author

K. Lingel, M. Kelly, J. Mevissen, J. Kandaswamy, H. Worden, J. A. Ernst, M. Sapper, W. M. Yao, J. D. Lewis, D. Peterson, Juliet Ritchie Patterson, M. Procario, M. Modesitt, Shawn W. Henderson, M. Garcia-Sciveres, D. G. Cassel, E. H. Thorndike, S. W. Gray, A. P. Freyberger, C. O'Grady, S. Schrenk, X. Fu, R. Fulton, M. Pisharody, Karl Berkelman, Vipul Jain, S. Roberts, E. Nordberg, F. M. Pipkin, G. S. Ludwig, D. Coppage, George R. Kalbfleisch, P. S. Drell, Robert Wilson, R. Poling, Hubert Kroha, J. L. Rodriguez, M. Saulnier, Ryszard Stroynowski, P. Wilson, J. Snow, K. Sparks, D. Riley, N. B. Mistry, P. Rankin, P. L. Wang, N. Kwak, J. G. Smith, R. S. Galik, R. Kennett, D. Z. Besson, T. Haupt, B. Gittelman, M. Worris, M. D. Mestayer, M. Daoudi, V. Romero, Marina Artuso, I. J. Kim, S. R. Ro, Ha Lam, R. Malchow, N. Horwitz, D. R. Johnson, R. L. McIlwain, D. Perticone, D. L. Krenick, N. Katayama, A. V. Barnes, J. Urheim, C. R. Ng, John E. Bartelt, B. Geiser, B. C. Barish, M. Lambrecht, D. S. Akerib, D. F. Cowen, J. Masui, H. Yamamoto, M. Thusalidas, G. Eigen, M. S. Alam, M. Lohner, S. E. Csorna, I. P. J. Shipsey, H. Tajima, J. Wolinski, B. Nemati, F. Butler, Janice Nelson, Yuichi Kubota, Sheldon Stone, Paul Avery, K. Kinoshita, D. N. Brown, M. Battle, A. J.R. Weinstein, Soumitra Nandi, Pu Wang, D. H. Miller, Daniela Bortoletto, C. R. Sun, W. T. Ford, J. Whitmore, T. Letson, R. D. Kass, M. M. Zoeller, K. Honscheid, R. Davis, E. I. Shibata, Yoram Rozen, Philip Baringer, D. M. Coffman, B. K. Heltsley, R. Ammar, C. Bebek, T. E. Browder, J. Dominick, T. Jensen, H. Kagan, R. Ehrlich, G. Zhu, P. Rubin, J. Alexander, R. J. Morrison, Mats A Selen, F. Morrow, A. J. Sadoff, D. L. Hartill, Daniel Schmidt, D. Xiao, K. K. Gan, T. Skwarnicki, P. C. Kim, Elliott Cheu, M. Goldberg, Glen D. Crawford, G. C. Moneti, S.F. Schaffner, Cong Wang, John Yelton, and P. Skubic

Subjects
Physics, Crystallography, Branching fraction, General Physics and Astronomy
Abstract

We have observed the previously unseen \ensuremath{\eta}${\mathrm{\ensuremath{\rho}}}^{+}$ and \ensuremath{\eta}'${\mathrm{\ensuremath{\rho}}}^{+}$ decay model of the ${\mathit{D}}_{\mathit{s}}^{+}$, and measured branching ratios relative to the \ensuremath{\varphi}${\mathrm{\ensuremath{\pi}}}^{+}$ mode of 2.86\ifmmode\pm\else\textpm\fi{}0.${38}_{\mathrm{\ensuremath{-}}0.38}^{+0.36}$ and 3.44\ifmmode\pm\else\textpm\fi{}0.${62}_{\mathrm{\ensuremath{-}}0.46}^{+0.44}$, respectively. In addition, the relative branching ratio for the decay into \ensuremath{\varphi}${\mathrm{\ensuremath{\rho}}}^{+}$ is measured as 1.86\ifmmode\pm\else\textpm\fi{}0.${26}_{\mathrm{\ensuremath{-}}0.40}^{+0.29}$. Combining these new measurements with previous results and those in the preceding Letter, we account for \ensuremath{\approxeq}(79\ifmmode\pm\else\textpm\fi{}26)% of ${\mathit{D}}_{\mathit{s}}$ decays.

Published
1992

20. ISOTOPE SHIFT MEASUREMENTS OF HELIUM

Author

F. M. Pipkin, John Lawall, and Ping Zhao

Subjects
Nuclear physics, Nuclear magnetic resonance, Materials science, Isotope, chemistry, chemistry.chemical_element, Statistical and Nonlinear Physics, Physics::Atomic Physics, Condensed Matter Physics, Isotopes of helium, Helium
Abstract

The helium isotope shift provides invaluable information for testing theories describing many-body systems. We review the recent advances in measurements of the isotope shifts for helium with an emphasis on a new experimental technique.

Published
1991

21. Measurement of the inclusiveB*cross section above the Υ(4S)

Author

R. Kennett, R. Ammar, M. Garcia-Sciveres, Ha Lam, B. Gittelman, R. J. Wilson, Vipul Jain, I. J. Kim, P. L. Wang, Ryszard Stroynowski, S. W. Gray, B. C. Barish, P. Rankin, Juliet Ritchie Patterson, J. Masui, M. Modesitt, S. R. Ro, R. Fulton, V. Romero, J. G. Smith, John E. Bartelt, J. L. Rodriguez, G.R. Kalbfleisch, M. Procario, W. M. Yao, J. Wolinski, A. P. Freyberger, D. L. Hartill, E. Nordberg, Soumitra Nandi, Daniel Schmidt, G. S. Ludwig, D. H. Miller, N. B. Mistry, M. S. Alam, M. Kelly, R. L. Malchow, P. S. Drell, P. Wilson, J. Mevissen, E. H. Thorndike, J. Kandaswamy, F. M. Pipkin, D. Z. Besson, T. Haupt, K. Lingel, D. F. Cowen, D. Coppage, J. Snow, J. D. Lewis, C. R. Sun, R. D. Kass, H. Worden, Elliott Cheu, Glen D. Crawford, D. Peterson, D. Perticone, B. Geiser, H. Kagan, N. Kwak, M. Lambrecht, D. N. Brown, M. Worris, Hubert Kroha, M. D. Mestayer, C. P. O'Grady, I. P. J. Shipsey, R. S. Galik, Janice Nelson, Sheldon Stone, Yoram Rozen, Paul Avery, R. J. Morrison, D. R. Johnson, D. Riley, R. L. McIlwain, Mats A Selen, A. J. Sadoff, A. V. Barnes, K. Sparks, T. Letson, C. R. Ng, Cong Wang, X. Fu, S. E. Csorna, P. Haas, John Yelton, F. Butler, K. Kinoshita, Marina Artuso, D. G. Cassel, Philip Baringer, R. Poling, N. Katayama, R. Davis, D. S. Akerib, Daniela Bortoletto, T. Jensen, G. Eigen, Yuichi Kubota, M. M. Zoeller, M. Thusalidas, M. Pisharody, Karl Berkelman, R. Ehrlich, D. M. Coffman, N. Horwitz, K. Honscheid, P. Skubic, B. K. Heltsley, J. Urheim, D. L. Kreinick, C. Bebek, T. E. Browder, B. Nemati, J. Dominick, M. Battle, A. J.R. Weinstein, E. I. Shibata, Pu Wang, J. Whitmore, M. Sapper, S. Schrenk, G. Zhu, P. Rubin, J. Alexander, F. Morrow, D. Xiao, K. K. Gan, T. Skwarnicki, M. Goldberg, G. C. Moneti, and S.F. Schaffner

Subjects
Nuclear physics, Physics, Particle decay, Meson, Electron–positron annihilation, Hadron, General Physics and Astronomy, Resonance, Elementary particle, Cornell Electron Storage Ring, Energy (signal processing)
Abstract

Using the CLEO II detector at the Cornell Electron Storage Ring, we have determined the inclusive {ital B}{sup *} cross section above the {Upsilon}(4{ital S}) resonance in the energy range from 10.61 to 10.70 GeV. We also report a new measurement of the energy of the {ital B}{sup *}{r arrow}{ital B}{gamma} transition photon of 46.2{plus minus}0.3{plus minus}0.8 MeV.

Published
1991

22. Inclusive χ(2P) production in Υ(3S) decay

Author

R. Fulton, E. Nordberg, G. S. Ludwig, C. O'Grady, D. Z. Besson, T. Haupt, M. Worris, A. J. Weinstein, P. Rubin, D. Riley, R. Ehrlich, S. W. Gray, M. Kelly, J. Alexander, J. Mevissen, F. Morrow, D. F. Cowen, R. Ammar, D. R. Johnson, N. Katayama, D. Perticone, J. Kandaswamy, T. Jensen, D. S. Akerib, G. Eigen, M. Lambrecht, I. P. J. Shipsey, D. Xiao, K. Honscheid, M. Garcia-Sciveres, K. Lingel, D. L. Kreinick, C. Bebek, Janice Nelson, D. Peterson, M. Sapper, M. Modesitt, Yuichi Kubota, Vipul Jain, T. E. Browder, J. Urheim, N. Horwitz, H. Worden, S. R. Ro, A. P. Freyberger, George R. Kalbfleisch, J. Dominick, M. Thusalidas, D. M. Coffman, B. K. Heltsley, Ryszard Stroynowski, P. Rankin, Daniela Bortoletto, J. Snow, K. K. Gan, T. Skwarnicki, M. Goldberg, G. C. Moneti, S.F. Schaffner, Sheldon Stone, Paul Avery, Robert Wilson, K. Sparks, Marina Artuso, S. Schrenk, M. Pisharody, Karl Berkelman, B. Nemati, R. Malchow, M. Battle, J. L. Rodriguez, N. B. Mistry, J. G. Smith, E. H. Thorndike, F. M. Pipkin, D. Coppage, Yoram Rozen, G. Zhu, John E. Bartelt, P. L. Wang, Soumitra Nandi, T. Letson, Philip Baringer, R. S. Galik, M. M. Zoeller, C. R. Sun, R. D. Kass, D. H. Miller, R. Davis, M. S. Alam, S. E. Csorna, K. Kinoshita, D. N. Brown, P. Haas, N. Kwak, M. D. Mestayer, R. L. McIlwain, A. V. Barnes, B. Geiser, D. G. Cassel, Cong Wang, F. Butler, R. Poling, John Yelton, D. L. Hartill, W. M. Yao, J. D. Lewis, Daniel Schmidt, R. Kennett, E. I. Shibata, X. Fu, Elliott Cheu, Ha Lam, Glen D. Crawford, H. Kagan, C. R. Ng, B. Gittelman, B. C. Barish, J. Masui, V. Romero, R. J. Morrison, Mats A Selen, A. J. Sadoff, J. Wolinski, I. J. Kim, Juliet Ritchie Patterson, M. Procario, P. Skubic, Pu Wang, J. Whitmore, Hubert Kroha, P. S. Drell, and P. Wilson

Subjects
Physics, Meson, Physics::Instrumentation and Detectors, Branching fraction, Computer Science::Information Retrieval, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Quarkonium, Nuclear physics, Particle decay, Radiative transfer, High Energy Physics::Experiment
Abstract

Using the CsI calorimeter of the CLEO II detector, the spin triplet {chi}{sub {ital b}}(2{ital P}) states are observed in {Upsilon}(3{ital S}) radiative decays with much higher statistics than seen in previous experiments. The observed mass splittings are not described well by theoretical models, while the relative branching ratios agree with predictions that include relativistic corrections to the radiative transition rates.

Published
1991

23. Study of continuumD*+spin alignment

Author

G. C. Moneti, E. I. Shibata, B. Nemati, F. Morrow, D. Besson, J. Whitmore, M. Pisharody, Karl Berkelman, B. Gittelman, T. Haupt, R. Davis, S. Hederson, Chunjie Wang, I. J. Kim, R. Malchow, John Yelton, W. C. Li, T. Jensen, P. Rubin, D. L. Hartill, R. Poling, L. Garren, D. Perticone, K. Honscheid, N. Kwak, Ian Shipsey, Yoram Rozen, W. M. Yao, C. Bebek, R. Fulton, P. Haas, T. E. Browder, Philip Baringer, P. Wilson, M. Sapper, R. L. McIlwain, A. M. Halling, M. Procario, A. V. Barnes, K. Sparks, C. R. Ng, A. Silverman, B. Geiser, M. Worris, S. Schrenk, Daniela Bortoletto, R. Ehrlich, Richard Wilson, S. Ro, M. Thusalidas, Hubert Kroha, M. D. Mestayer, Marina Artuso, D. L. Kreinick, D. N. Brown, N. Horwitz, D. Riley, Maurice Garcia-Sciveres, Elliott Cheu, V. Jain, G. Crawford, J. Dominick, S. F. Schaffner, J. Bartelt, E. Nordberg, M. S. Alam, E. H. Thorndike, M. M. Zoeller, G. S. Ludwig, N. Katayama, H. Kagan, F. M. Pipkin, D. M. Coffman, D. Coppage, P. S. Drell, Yuichi Kubota, B. K. Heltsley, T. Letson, D. H. Miller, Jorge Luis Rodriguez, R. Ammar, G. Zhu, J. P. Alexander, V. Romero, H. Worden, J. K. Nelson, P. N. Wang, Mats A Selen, D. R. Johnson, A. J. Sadoff, D. G. Cassel, C. O'Grady, Tomasz Skwarnicki, S. Nandi, S. E. Csorna, K. Kinoshita, J. Mevissen, J. Kandaswamy, D. Peterson, M. Battle, N. B. Mistry, M. Goldberg, Ha Lam, Sheldon Stone, Paul Avery, J. Masui, J. Wolinski, J. D. Lewis, C. R. Sun, R. D. Kass, M. Modesitt, M. L. Kelly, and S. W. Gray

Subjects
Physics, Momentum, Particle physics, Angular distribution, Annihilation, Spin polarization, Meson, Electron–positron annihilation, High Energy Physics::Experiment, Continuum (set theory), Nuclear Experiment, Spin-½
Abstract

The spin alignment of ${D}^{*+}$ mesons produced in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at $\sqrt{s}=10.5$ GeV is obtained from a study of the angular distribution of the decay ${D}^{*+}\ensuremath{\rightarrow}{D}^{0}{\ensuremath{\pi}}^{+}$. The alignment is studied as a function of momentum and compared to theoretical predictions. We find an average value of the spin alignment parameter $\ensuremath{\eta}$ of $〈\ensuremath{\eta}〉=0.04\ifmmode\pm\else\textpm\fi{}0.02\ifmmode\pm\else\textpm\fi{}0.01$. We obtain a model-dependent measurement of the probability of producing a vector particle $〈{P}_{V}〉=0.77\ifmmode\pm\else\textpm\fi{}0.02\ifmmode\pm\else\textpm\fi{}0.01$ for $D$ mesons.

Published
1991

24. Inclusive production of the charmed baryonΛc+frome+e−annihilations ats=10.55GeV

Author

E. H. Thorndike, F. M. Pipkin, Y. Zhu, D. Coppage, N. Kwak, Mats A Selen, A. Silverman, M. D. Mestayer, A. J. Sadoff, S. R. Ro, D. Z. Besson, T. Haupt, R. L. McIlwain, R. S. Galik, D. G. Cassel, W. M. Yao, J. D. Lewis, M. Thulasidas, Cong Wang, Richard Wilson, P. Haas, R. Poling, Ha Lam, K. Sparks, M. Procario, John Yelton, D. Perticone, Yoram Rozen, M. Pisharody, G. Zhu, Karl Berkelman, W. Y. Chen, James Mueller, M. S. Alam, R. Ammar, D. M. Coffman, Philip Baringer, D. L. Hartill, T. Skwarnicki, I. P. J. Shipsey, B. K. Heltsley, V. Romero, H. Worden, Wei Li, Vipul Jain, D. H. Miller, R. Ehrlich, Janice Nelson, M. M. Zoeller, Marina Artuso, N. Horwitz, D. Riley, M. Goldberg, G. C. Moneti, M. Sapper, D. L. Kreinick, C. Bebek, Vivek Sharma, S.F. Schaffner, T. E. Browder, Elliott Cheu, J. Dominick, Glen D. Crawford, C. R. Ng, C. O'Grady, Yuichi Kubota, P. Rubin, J. Alexander, A. M. Halling, N. Katayama, J. Wolinski, F. Morrow, M. Worris, R. Fulton, J. Kandaswamy, D. Xiao, S. E. Csorna, T. Jensen, E. Nordberg, S. W. Gray, G. S. Ludwig, D. Peterson, K. Kinoshita, T. Letson, D. R. Johnson, Daniela Bortoletto, Xinchou Lou, Sheldon Stone, J. W. Dewire, Paul Avery, P. S. Drell, P. Wilson, Soumitra Nandi, L. Garren, B. Gittelman, C. R. Sun, R. D. Kass, I. J. Kim, N. B. Mistry, J. Whitmore, Pu Wang, E. I. Shibata, and H. Kagan

Subjects
Baryon, Physics, Particle physics, Branching fraction, Production (computer science), Continuum (set theory)
Abstract

We report results on inclusive production of the charmed baryon ${{\ensuremath{\Lambda}}_{c}}^{+}$ from ${e}^{+}{e}^{\ensuremath{-}}$ annihilations at $\sqrt{s}=10.5$ GeV. Measurements are presented of the inclusive cross section times branching fraction for the continuum production of ${{\ensuremath{\Lambda}}_{c}}^{+}$ as observed in six different decay modes, and of a new, improved value of the ${{\ensuremath{\Lambda}}_{c}}^{+}$ mass. The inclusive cross section times the branching fraction into $p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ is measured to be 10.0\ifmmode\pm\else\textpm\fi{}1.5\ifmmode\pm\else\textpm\fi{}1.5 pb summed over all ${x}_{p}$. The branching fractions of ${{\ensuremath{\Lambda}}_{c}}^{+}$ into $p{\overline{K}}^{0}$, $p{\overline{K}}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\Lambda}{\ensuremath{\pi}}^{+}$, $\ensuremath{\Lambda}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, and ${\ensuremath{\Xi}}^{\ensuremath{-}}{K}^{+}{\ensuremath{\pi}}^{+}$ relative to that into $p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ are measured to be 0.44\ifmmode\pm\else\textpm\fi{}0.07\ifmmode\pm\else\textpm\fi{}0.05, 0.43\ifmmode\pm\else\textpm\fi{}0.12\ifmmode\pm\else\textpm\fi{}0.04, 0.18\ifmmode\pm\else\textpm\fi{}0.03\ifmmode\pm\else\textpm\fi{}0.03, 0.65\ifmmode\pm\else\textpm\fi{}0.11\ifmmode\pm\else\textpm\fi{}0.12, and 0.15\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.03, respectively. The ${{\ensuremath{\Lambda}}_{c}}^{+}$ mass is measured to be 2284.7\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.7 MeV/${\mathit{c}}^{2}$. The measured momentum distributions for continuum production of ${{\ensuremath{\Lambda}}_{c}}^{+}$ are compared to analytical fragmentation functions and to other measurements.

Published
1991

25. Study ofD0decays into final states with aπ0orη

Author

M. Procario, H. Kagan, A. M. Halling, E. H. Thorndike, M. Worris, J. Masui, S. F. Schaffner, Daniela Bortoletto, J. Bartelt, D. G. Cassel, Y. Zhu, T. Letson, D. H. Miller, D. Coppage, P. S. Drell, R. Fulton, Mats A Selen, R. Ammar, J. Whitmore, M. S. Alam, A. J. Sadoff, T. E. Browder, J. P. Alexander, F. Morrow, J. Wolinski, T. Haupt, P. N. Wang, D. Besson, P. Wilson, Yuichi Kubota, E. Nordberg, S. E. Csorna, N. Katayama, R. Malchow, Ha Lam, C. Bebek, J. D. Lewis, G. S. Ludwig, John Yelton, B. Geiser, A. Silverman, K. Kinoshita, V. Romero, C. O'Grady, Tomasz Skwarnicki, J. K. Nelson, R. S. Galik, W. C. Li, D. Xiao, M. L. Kelly, T. Jensen, C. R. Sun, Hubert Kroha, N. Kwak, Richard Wilson, S. W. Gray, M. Modesitt, R. D. Kass, F. M. Pipkin, L. Garren, M. Goldberg, K. Honscheid, Elliott Cheu, N. Horwitz, G. Crawford, G. C. Moneti, B. Gittelman, Maurice Garcia-Sciveres, M. M. Zoeller, N. B. Mistry, R. L. McIlwain, H. Worden, I. J. Kim, Chunjie Wang, E. I. Shibata, J. Mevissen, M. Sapper, A. V. Barnes, S. Schrenk, V. Jain, J. Kandaswamy, K. Sparks, M. Pisharody, Karl Berkelman, D. Peterson, C. R. Ng, S. Nandi, Sheldon Stone, G. Zhu, M. D. Mestayer, D. N. Brown, Paul Avery, Marina Artuso, D. R. Johnson, M. Thusalidas, I. P.J. Shipsey, R. Davis, P. Rubin, D. L. Kreinick, J. Dominick, M. Battle, D. Perticone, Yoram Rozen, W. M. Yao, P. Haas, Philip Baringer, R. Ehrlich, S. Ro, D. M. Coffman, B. K. Heltsley, D. L. Hartill, R. Poling, and D. Riley

Subjects
Physics, Crystallography, Pion, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Isospin, Hadron, Elementary particle, Cornell Electron Storage Ring, Omega
Abstract

We have made measurements of decay modes of neutral {ital D} mesons into exclusive final states containing photons using data collected with the CLEO detector at the Cornell Electron Storage Ring. We report observation of {ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{pi}{sup +}{pi}{sup {minus}}{pi}{sup +}{pi}{sup 0} (charge conjugates are implicit), and present new measurements of the branching ratios for {ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{pi}{sup +}{pi}{sup 0}, {ital D}{sup 0}{r arrow}{ital {bar K}}{sup 0}{pi}{sup +}{pi}{sup 0}{pi}{sup {minus}}, {ital D}{sup 0}{r arrow}{ital {bar K}}{sup 0}{pi}{sup 0}, {ital {bar K}}{sup *0}{eta}, and {ital D}{sup 0}{r arrow}{ital {bar K}}{sup 0}{omega}. Where possible, results are compared with theoretical predictions for two-body {ital D}{sup 0} decays.

Published
1991

26. Measurement of the lifetime of the metastablea’’Σg+1state ofN2

Author

F. M. Pipkin and A. W. Kam

Subjects
chemistry.chemical_classification, Physics, education.field_of_study, Population, Sigma, Fluorescence, Diatomic molecule, Atomic and Molecular Physics, and Optics, chemistry, Metastability, Atomic physics, education, Laser-induced fluorescence, Inorganic compound, Excitation
Abstract

We have measured the lifetime of the a'' $^{1}\mathrm{\ensuremath{\Sigma}}_{\mathit{g}}^{+}$(v=0) level of ${\mathrm{N}}_{2}$ by monitoring through laser-induced vacuum ultraviolet fluorescence its population as a function of time after pulsed-electron excitation. The lifetime was measured for several rotational levels and found to be independent of the rotational level. The average lifetime is 3.49(10) \ensuremath{\mu}s. This lifetime suggests that predissociation, not radiation, is the main decay mode for this metastable level.

Published
1991

27. Study ofπ+π−transitions from theϒ(3S)and a search for thehb

Author

R. DeSalvo, G. C. Moneti, E. I. Shibata, Thomas Ferguson, A. M. Halling, Y. Kubota, M. Worris, D. L. Hartill, R. Poling, Daniela Bortoletto, F. Morrow, J. W. Dewire, B. Gittelman, Ian Shipsey, D. Chen, V. Sharma, I. J. Kim, W. C. Li, M. Procario, R. Ehrlich, Xinchou Lou, T. Jensen, R. Fulton, C. Bebek, E. Nordberg, L. Garren, R. L. McIlwain, T. Skwarnicki, D. Besson, A. Silverman, R. Ng, F. M. Pipkin, M. D. Mestayer, M. S. Alam, T. Copie, D. G. Cassel, S. Nandi, P. Baringer, T. Letson, D. H. Miller, D. L. Kreinick, H. Kagan, Richard Wilson, P. Lubrano, R. S. Galik, James Mueller, S. E. Csorna, R. Holmes, K. Kinoshita, D. Riley, P. Haas, J. Byrd, M. Hempstead, A. J. Sadoff, T. J. V. Bowcock, D. Xiao, D. M. Coffman, John Yelton, B. K. Heltsley, E. Blucher, N. Horwitz, R. Namjoshi, Elliott Cheu, Glen D. Crawford, M. Pisharody, Karl Berkelman, V. Tanikella, D. R. Johnson, J. Kandaswamy, A. Jawahery, D. Peterson, Ian Brock, R. Kowalewski, C. H. Park, N. B. Mistry, Hans J. Vogel, N. Katayama, M. Goldberg, J. Wolinski, J. D. Lewis, C. R. Sun, R. D. Kass, Sheldon Stone, Paul Avery, D. Perticone, S. W. Gray, and J. Whitmore

Subjects
Physics, Crystallography, Particle decay, ComputingMilieux_THECOMPUTINGPROFESSION, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, Bound state, Dalitz plot, Elementary particle
Abstract

We have investigated the transitions {Upsilon}(3{ital S}){r arrow}{pi}{sup +}{pi}{sup {minus}}{Upsilon}(1{ital S}), {Upsilon}(3{ital S}){r arrow}{pi}{sup +}{pi}{sup {minus}}{Upsilon}(2{ital S}) and the cascade process {Upsilon}(3{ital S}){r arrow}{Upsilon}(2{ital S})+{ital X},{Upsilon}(2{ital S}){r arrow}{pi}{sup +}{pi}{sup {minus}}{Upsilon}(1{ital S}), both in the exclusive decay mode, with the daughter {Upsilon} state decaying into two leptons, and in the inclusive decay mode, with the daughter {Upsilon} state decaying hadronically. Results are presented on the branching fractions and properties of the {pi}{sup +}{pi}{sup {minus}} system. The {pi}{sup +}{pi}{sup {minus}} invariant-mass spectra for the decays {Upsilon}(3{ital S}){r arrow}{pi}{sup +}{pi}{sup {minus}}{Upsilon}(1{ital S}) and {Upsilon}(3{ital S}){r arrow}{pi}{sup +}{pi}{sup {minus}}{Upsilon}(2{ital S}) are measured and compared with theoretical predictions. We also present the results of a search for the {ital h}{sub {ital b}}(1 {sup 1}{ital P}{sub 1}) and {Upsilon}(1 {sup 3}{ital D}) states in inclusive {Upsilon}(3{ital S}) decays, and for the exclusive decay {Upsilon}(3{ital S}){r arrow}{eta}{Upsilon}(1{ital S}).

Published
1991

28. High-precision isotope-shift measurement of23S-23Ptransition in helium

Author

John Lawall, Ping Zhao, and F. M. Pipkin

Subjects
Physics, Helium-4, Helium-3, General Physics and Astronomy, Physics::Atomic Physics, Atomic physics, Coupling (probability), Hyperfine structure, Microwave spectrometry, Isotopes of helium, Molecular electronic transition, Spectral line
Abstract

The isotope shift for the ${2}^{3}$S-${2}^{3}$P transition between $^{3}\mathrm{He}$ and $^{4}\mathrm{He}$ has been measured with a laser-microwave spectroscopy technique to a precision of 1 ppm, or 30 kHz. Our result is 100 times more precise than previous measurements and is by far the most precise isotope-shift measurement ever made for a multielectron system. It provides, for the first time, not only a check for the specific mass shift, but also for the calculations of the nuclear volume shift, the relativistic corrections involving the coupling between electrons, and the QED contributions.

Published
1991

29. Exclusive and inclusive semileptonic decays ofBmesons toDmesons

Author

Ron Poling, Maurice Garcia-Sciveres, G. C. Moneti, F. Morrow, Elliott Cheu, B. Geiser, J. Masui, Glen D. Crawford, K. Sparks, D. G. Cassel, E. I. Shibata, C. R. Ng, M. D. Mestayer, Y. Zhu, W. C. Li, M. Pisharody, S. W. Gray, Karl Berkelman, A. M. Halling, N. Katayama, Marina Artuso, T. Jensen, P. S. Drell, John Yelton, M. Worris, J. Whitmore, N. Horwitz, L. Garren, D. L. Kreinick, B. Gittelman, E. H. Thorndike, R. Ammar, V. Romero, J. K. Nelson, I. J. Kim, D. Xiao, F. M. Pipkin, P. Rubin, M. Thulasidas, J. Dominick, C. Bebek, Mats A Selen, D. Coppage, K. Honscheid, P. N. Wang, J. P. Alexander, A. J. Sadoff, M. Battle, Harris Kagan, W. Y. Chen, V. Sharma, S. Nandi, M. Sapper, R. Ehrlich, D. R. Johnson, S. Ro, R. Davis, R. S. Galik, D. M. Coffman, Chunjie Wang, M. M. Zoeller, B. K. Heltsley, D. Perticone, G. Zhu, Yoram Rozen, P. Haas, Richard Wilson, Philip Baringer, D. Riley, S. F. Schaffner, Yuichi Kubota, N. B. Mistry, J. Mevissen, J. Kandaswamy, D. Peterson, Daniela Bortoletto, J. W. Dewire, Sheldon Stone, Paul Avery, J. D. Lewis, C. R. Sun, R. D. Kass, D. Besson, R. Fulton, E. Nordberg, G. S. Ludwig, T. Letson, D. H. Miller, H. Worden, C. O'Grady, Ian Shipsey, Tomasz Skwarnicki, T. E. Browder, P. Wilson, A. Silverman, W. M. Yao, S. E. Csorna, K. Kinoshita, T. Haupt, J. Wolinski, V. Jain, D. L. Hartill, N. Kwak, Ha Lam, R. L. McIlwain, M. S. Alam, M. Procario, and M. Goldberg

Subjects
Semileptonic decay, Physics, Particle decay, Particle physics, Crystallography, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, B meson
Abstract

We report new measurements of the branching fractions {ital B}({ital B}{sup {minus}}{r arrow}{ital D}{sup 0}{ital l{minus}}{bar {nu}}), {ital B}({ital {bar B}}{sup 0}{r arrow}{ital D}{sup +}{ital l{minus}}{bar {nu}}), and {ital B}({ital B}{sup {minus}}{r arrow}{ital D}{sup *0}{ital l{minus}}{bar {nu}}). Combining these results with our previous measurement of {ital B}({ital {bar B}}{sup 0}{r arrow}{ital D}{sup *+}{ital l{minus}}{bar {nu}}), we find that the ratio of semileptonic widths for final states with a vector meson and pseudoscalar meson is (2.6{sub {minus}0.6{minus}0.8}{sup +1.1+1.0}) and the ratio of charged- to neutral-{ital B}-meson lifetimes is (0.89{plus minus}0.19{plus minus}0.13)({ital f}{sub 00}/{ital f}{sub +{minus}}) where ({ital f}{sub 00}/{ital f}{sub +{minus}}) is the ratio of neutral- to charged-{ital B}-meson production at the {Upsilon}(4{ital S}). From the {ital {bar B}}{r arrow}{ital Dl}{sup {minus}}{bar {nu}} branching fraction, we calculate {vert bar}{ital V}{sub {ital c}{ital b}}{vert bar}=0.040{plus minus}0.006 {plus minus}0.006, where the first error is statistical and the second is systematic and dominated by the uncertainty in the {ital B}-meson lifetime.

Published
1991

30. Measurement of theΛc+decay-asymmetry parameter

Author

D. G. Cassel, R. Poling, N. Kwak, T. Skwarnicki, A. M. Halling, R. Ammar, D. Perticone, M. Goldberg, M. D. Mestayer, M. Worris, S. R. Ro, G. C. Moneti, Vivek Sharma, R. Ehrlich, M. Kelly, S.F. Schaffner, R. L. McIlwain, Sheldon Stone, Paul Avery, P. Rubin, J. Mevissen, J. Kandaswamy, J. Alexander, T. Letson, D. Z. Besson, T. Haupt, Janice Nelson, H. Worden, Wei Li, A. V. Barnes, F. Morrow, D. H. Miller, E. H. Thorndike, M. M. Zoeller, D. R. Johnson, Soumitra Nandi, D. Xiao, F. M. Pipkin, M. Garcia-Sciveres, Pu Wang, Vipul Jain, D. Coppage, N. Horwitz, M. S. Alam, M. Thulasidas, T. Jensen, J. Whitmore, D. Peterson, R. Fulton, R. Davis, C. R. Sun, R. D. Kass, G. Zhu, Y. Zhu, D. L. Kreinick, C. Bebek, R. S. Galik, W. Y. Chen, Cong Wang, Yoram Rozen, M. Battle, S. W. Gray, T. E. Browder, E. Nordberg, Philip Baringer, G. S. Ludwig, John Yelton, J. Dominick, C. O'Grady, M. Pisharody, Karl Berkelman, D. L. Hartill, P. Haas, S. E. Csorna, E. I. Shibata, Ha Lam, K. Kinoshita, D. M. Coffman, L. Garren, B. K. Heltsley, Richard Wilson, N. B. Mistry, J. Masui, Elliott Cheu, Glen D. Crawford, H. Kagan, D. Riley, J. Wolinski, W. M. Yao, J. D. Lewis, Yuichi Kubota, Daniela Bortoletto, Mats A Selen, N. Katayama, J. W. Dewire, A. J. Sadoff, K. Honscheid, Ian Shipsey, V. Romero, A. Silverman, M. Sapper, B. Gittelman, I. J. Kim, B. Geiser, K. Sparks, Marina Artuso, P. S. Drell, P. Wilson, C. R. Ng, and M. Procario

Subjects
Physics, Condensed matter physics, Meson, Computer Science::Information Retrieval, Hadron, General Physics and Astronomy, Elementary particle, Lambda, Baryon, Charmed baryons, Crystallography, Particle decay, TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES, Pion, TheoryofComputation_LOGICSANDMEANINGSOFPROGRAMS, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, High Energy Physics::Experiment
Abstract

We report a measurement of {Lambda} polarization in the two-body decay {Lambda}{sub {ital c}}{sup +}{r arrow}{Lambda}{pi}{sup +}, in nonresonant {ital e}{sup +}{ital e}{sup {minus}} interactions from data taken with the CLEO detector. Using these data we have determined the parity-violating asymmetry decay parameter {alpha}{sub {Lambda}{ital c}} to be {minus}1.0{sub {minus}0.0}{sup +0.4}. We see no evidence for significant {Lambda}{sub {ital c}}{sup +} polarization.

Published
1990

31. Study of K∗ production in tau decay

Author

T. E. Browder, P. Wilson, A. Silverman, J. Masui, H. Kagan, Y. Zhu, D. G. Cassel, P. Rubin, Mats A Selen, M. Thulasidas, A. J. Sadoff, C. O'Grady, E. H. Thorndike, D. R. Johnson, C. Bebek, K. Sparks, W. M. Yao, F. Morrow, W. Y. Chen, F. M. Pipkin, Tomasz Skwarnicki, D. L. Kreinick, D. Coppage, C. R. Ng, J. P. Alexander, John Yelton, M. Pisharody, V. Sharma, J. Wolinski, Karl Berkelman, D. Xiao, A. M. Halling, J. Dominick, R. Ehrlich, N. Katayama, Richard Wilson, Maurice Garcia-Sciveres, W. C. Li, T. Haupt, B. Gittelman, M. Worris, Chunjie Wang, S. Ro, D. Besson, T. Jensen, M. Goldberg, H. Worden, L. Garren, V. Romero, J. K. Nelson, S. W. Gray, I. J. Kim, Marina Artuso, K. Honscheid, D. Perticone, N. Horwitz, G. Zhu, Ha Lam, Yoram Rozen, P. Haas, J. D. Lewis, Elliott Cheu, R. Fulton, Glen D. Crawford, M. Sapper, Philip Baringer, D. M. Coffman, B. K. Heltsley, C. R. Sun, Daniela Bortoletto, E. Nordberg, R. D. Kass, M. M. Zoeller, G. S. Ludwig, J. W. Dewire, S. Nandi, P. S. Drell, Sheldon Stone, Paul Avery, D. Riley, S. F. Schaffner, B. Geiser, R. S. Galik, R. Ammar, P. N. Wang, Yuichi Kubota, N. B. Mistry, J. Mevissen, J. Kandaswamy, D. Peterson, G. C. Moneti, E. I. Shibata, J. Whitmore, M. D. Mestayer, T. Letson, D. H. Miller, S. E. Csorna, K. Kinoshita, M. S. Alam, N. Kwak, R. L. McIlwain, M. Procario, V. Jain, D. L. Hartill, R. Poling, and Ian Shipsey

Subjects
Physics, Nuclear and High Energy Physics, Branching fraction, Atomic physics, Conjugate
Abstract

We report on a study of charged and neutral K ∗ production in tau decay. We obtain a branching ratio value BR (τ − → K ∗- ν τ X 0 ) = (1.43±0.11±0.13)% where X 0 designates possible unobserved neutral particles (charge conjugate modes are implicit). We observe the first signals for inclusive K ∗0 and K ∗0 production in τ − decay, and determine the inclusive branching ratios τ − →K ∗0 K − ν τ X 0 and τ − K ∗0 π − ν τ X 0 to be (0.32±0.08±0.12)% and (0.38±0.11±0.13)%, respectively. We have searched for the decay τ − → K 0 K − ν τ X 0 and set a limit of 8 × 10 −3 at 90% confidence level.

Published
1990

32. Determination ofB(Ds+→φπ+) via observation ofDs+→φl+ν

Author

J. Alexander, M. Artuso, C. Bebek, K. Berkelman, T. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, G. Crawford, J. W. DeWire, P. S. Drell, R. Ehrlich, R. S. Galik, B. Gittelman, S. W. Gray, A. M. Halling, D. L. Hartill, B. K. Heltsley, J. Kandaswamy, N. Katayama, D. L. Kreinick, J. D. Lewis, G. S. Ludwig, N. B. Mistry, J. Mueller, S. Nandi, E. Nordberg, C. O’Grady, D. Peterson, M. Pisharody, D. Riley, M. Sapper, M. Selen, A. Silverman, S. Stone, H. Worden, M. Worris, A. J. Sadoff, P. Avery, D. Besson, L. Garren, J. Yelton, T. Bowcock, K. Kinoshita, F. M. Pipkin, M. Procario, Richard Wilson, J. Wolinski, D. Xiao, Y. Zhu, R. Ammar, P. Baringer, D. Coppage, P. Haas, M. Kelly, N. Kwak, Ha Lam, S. Ro, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, R. Fulton, T. Jensen, D. R. Johnson, H. Kagan, R. Kass, F. Morrow, J. Whitmore, P. Wilson, D. Bortoletto, W.-Y. Chen, J. Dominick, R. L. McIlwain, D. H. Miller, C. R. Ng, S. F. Schaffner, E. I. Shibata, I. P. J. Shipsey, W.-M. Yao, K. Sparks, E. H. Thorndike, C.-H. Wang, M. S. Alam, I. J. Kim, W. C. Li, X. C. Lou, V. Romero, C. R. Sun, P.-N. Wang, M. M. Zoeller, M. Goldberg, T. Haupt, N. Horwitz, V. Jain, M. D. Mestayer, G. C. Moneti, Y. Rozen, P. Rubin, V. Sharma, T. Skwarnicki, M. Thulasidas, G. Zhu, S. E. Csorna, and T. Letson

Subjects
Physics, Crystallography, Particle decay, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, B meson, Cornell Electron Storage Ring
Abstract

Using the CLEO detector at the Cornell Electron Storage Ring (CESR), we have determined the ratio {Gamma}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{ital l}{sup +}{nu})/{Gamma}({ital D}{sub {ital s}}{sup +} {r arrow}{phi}{pi}{sup +})=0.49{plus minus}0.10{sub {minus}0.14}{sup +0.10}. We use this measurement to derive {ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +}).

Published
1990

33. Study of the decaysD0→KK¯, ππ¯

Author

M. Procario, D. Z. Besson, C. R. Ng, T. Haupt, Vipul Jain, E. H. Thorndike, Sheldon Stone, Paul Avery, Richard Wilson, Soumitra Nandi, T. Jensen, C. O'Grady, Daniela Bortoletto, P. Rubin, M. Thulasidas, F. M. Pipkin, A. M. Halling, M. S. Alam, Wei Li, N. Horwitz, D. H. Miller, D. M. Coffman, D. Coppage, C. R. Sun, R. D. Kass, B. K. Heltsley, S. W. Gray, M. Sapper, M. Worris, H. Kagan, G. Zhu, Y. Zhu, D. L. Kreinick, C. Bebek, A. Silverman, A. Jawahery, R. Ammar, T. E. Browder, J. Wolinski, Yoram Rozen, J. Dominick, R. Fulton, M. L. Kelly, T. Skwarnicki, W. M. Yao, J. D. Lewis, Mats A Selen, D. Perticone, Philip Baringer, D. R. Johnson, I. P. J. Shipsey, A. J. Sadoff, M. Pisharody, Janice Nelson, K. Sparks, M. Goldberg, G. C. Moneti, Karl Berkelman, R. Ehrlich, E. Nordberg, S. Ro, W. Y. Chen, Vivek Sharma, P. Haas, Cong Wang, Marina Artuso, S.F. Schaffner, G. S. Ludwig, N. Kwak, M. D. Mestayer, Ha Lam, M. M. Zoeller, D. Riley, John Yelton, R. L. McIlwain, H. Worden, Yuichi Kubota, D. L. Hartill, T. Letson, S. E. Csorna, Pu Wang, Elliott Cheu, Glen D. Crawford, K. Kinoshita, L. Garren, N. Katayama, N. B. Mistry, J. Whitmore, J. Kandaswamy, D. Peterson, J. Alexander, F. Morrow, D. Xiao, E. I. Shibata, J. W. Dewire, B. Gittelman, V. Romero, I. J. Kim, D. G. Cassel, R. Poling, P. S. Drell, P. Wilson, and K. Honscheid

Subjects
Physics, Particle decay, Measurement method, Crystallography, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, General Physics and Astronomy
Abstract

Using the CLEO detector we have observed the Cabibbo-suppressed decays {ital D}{sup 0}{r arrow}{ital K}{sup 0}{ital {bar K}0}, {ital K}{sup +}{ital K}{sup {minus}}, and {pi}{sup +}{pi}{sup {minus}}. We determine {ital B}({ital D}{sup 0}{r arrow}{ital K}{sup 0}{ital {bar K}0})= (0.13{sup +0.07}{sub {minus}0.05}{sup +0.02}{sub {minus}0.02})%. Our measurement {ital B}({ital D}{sup 0}{r arrow}{ital K}{sup +}{ital K}{sup {minus}})/{ital B}({ital D}{sup 0}{r arrow}{pi}{sup +}{pi}{sup {minus}})=2.35{plus minus}0.37{plus minus}0.28 represents asubstantial improvement over previous results. We find no evidence for the decay {ital D}{sup 0}{r arrow}{pi}{sup 0}{pi}{sup 0}, and place a 90%-confidence-level upper limit of {ital B}({ital D}{sup 0}{r arrow}{pi}{sup 0}{pi}{sup 0}){lt}0.46%.

Published
1990

34. Measurement of γγ widths of charmonium states

Author

N. Katayama, P. Wilson, D. L. Hartill, R. Poling, R. Fulton, B. Gittlman, A. Silverman, W. M. Yao, D. L. Kreinick, E. Nordberg, C. O'Grady, H. Kagan, G. C. Moneti, M. S. Alam, Tomasz Skwarnicki, F. Morrow, E. I. Shibata, A. J. Sadoff, K. Sparks, Themistocles Bowcock, V. Jain, C. R. Ng, M. Procario, W. C. Li, M. Thulasidas, C. H. Park, John Yelton, Daniela Bortoletto, Marina Artuso, T. Jensen, R. L. McIlwain, D. M. Coffman, H. Worden, N. B. Mistry, L. Garren, B. K. Heltsley, S. W. Gray, J. W. Dewire, M. Pisharody, Karl Berkelman, Elliott Cheu, Glen D. Crawford, V. Sharma, R. Ehrlich, M. Sapper, J. Whitmore, N. Horwitz, Chunjie Wang, J. Kandaswamy, R. Ammar, D. Perticone, P. N. Wang, P. Haas, James Mueller, D. Peterson, Philip Baringer, D. R. Johnson, A. Jawahery, D. Xiao, D. Besson, E. H. Thorndike, F. M. Pipkin, D. Coppage, P.S. Dell, S. E. Csorna, M. I. Zoeller, K. Kinoshita, R. Namjoshi, T. Letson, D. H. Miller, Ha Lam, J. D. Lewis, C. Bebek, W. Y. Chen, C. R. Sun, R. D. Kass, M. Goldberg, A. M. Halling, M. Worris, J. Wolinski, D. Riley, Sheldon Stone, Xinchou Lou, S. F. Schaffner, Paul Avery, M. Hempstead, Yuichi Kubota, Richard Wilson, D. G. Cassel, James Alexander, S. Nandi, J. K. Nelson, M. D. Mestayer, I. J. Kim, R. S. Galik, and Ian Shipsey

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Antiparticle, Condensed matter physics, Meson, Branching fraction, Molecular, Quarkonium, Atomic, Nuclear & Particles Physics, Nuclear physics, Particle decay, Particle and Plasma Physics, Pair production, Nuclear, Cornell Electron Storage Ring, Mathematical Physics, Astronomical and Space Sciences
Abstract

Using the CLEO detector at the Cornell Electron Storage Ring, we have searched for two-photon production of charmonium in four-track final states. We have measured Γ γγ ( η c )=5.9 +2.1 −1.8 ±1.9 keV, and we have obtained 95% CL upper limits of Γ γγ ( X c 0 ) Γ γγ ( X c 2 )

Published
1990

35. Observation of Υ(4S) decays into non-BB¯final states containing ψ mesons

Author

M. Pisharody, Karl Berkelman, Vipul Jain, Soumitra Nandi, W. Y. Chen, N. Horwitz, D. L. Hartill, J. Kandaswamy, D. Peterson, L. Garren, C. H. Park, N. B. Mistry, E. H. Thorndike, Richard Wilson, D. G. Cassel, F. M. Pipkin, D. Coppage, Ha Lam, C. R. Sun, A. Silverman, Elliott Cheu, Glen D. Crawford, R. D. Kass, Pu Wang, W. M. Yao, J. D. Lewis, T. J. V. Bowcock, S. E. Csorna, M. I. Zoeller, R. S. Galik, M. Procario, R. Poling, T. Letson, K. Kinoshita, H. Kagan, A. Jawahery, D. Z. Besson, M. D. Mestayer, Sheldon Stone, E. I. Shibata, M. Sapper, Paul Avery, Daniela Bortoletto, K. Sparks, Wei Li, J. Whitmore, R. Ammar, J. W. Dewire, C. R. Ng, D. H. Miller, J. Wolinski, R. L. McIlwain, A. M. Halling, M. Worris, Marina Artuso, D. R. Johnson, Xinchou Lou, M. S. Alam, P. S. Drell, A. J. Sadoff, P. Haas, Cong Wang, P. Wilson, John Yelton, D. Riley, B. Gittelman, T. Jensen, I. J. Kim, D. L. Kreinick, C. Bebek, Yuichi Kubota, N. Katayama, J. Dominick, D. M. Coffman, B. K. Heltsley, M. Thulasidas, R. Ehrlich, T. Skwarnicki, C. O'Grady, James Mueller, M. Goldberg, G. C. Moneti, Philip Baringer, Vivek Sharma, S.F. Schaffner, H. Worden, R. Fulton, E. Nordberg, J. Alexander, F. Morrow, D. Xiao, D. Perticone, I. P. J. Shipsey, Janice Nelson, R. Namjoshi, and S. W. Gray

Subjects
Physics, Momentum, Particle physics, Meson, Electron–positron annihilation, General Physics and Astronomy, B meson
Abstract

We report on the observation of ψ mesons from Υ(4S) decays which are too energetic to come from B mesons. These events provide the first evidence for non-BB¯ decays of the Υ(4S). The measured rate is B[Υ(4s)→ψX]=(0.22±0.06±0.04)% for ψ momentum above 2 GeV/c.

Published
1990

36. Autoionization rates and energy levels of tripletnf,v=1 Rydberg states ofH2

Author

F. M. Pipkin, John Lawall, M. D. Lindsay, A. W. Kam, Ping Zhao, and Edward E. Eyler

Subjects
Physics, Quantum number, Atomic and Molecular Physics, and Optics, symbols.namesake, Autoionization, Excited state, Rydberg formula, symbols, Physics::Atomic Physics, Atomic physics, Ionization energy, Triplet state, Rydberg state, Energy (signal processing)
Abstract

We have measured the linewidths of 35 different triplet Rydberg states of the ${\mathrm{H}}_{2}$ molecule with quantum numbers n=10\char21{}22, L=3, v=1, and R=0\char21{}4. An 18-eV electron beam excites a collimated ${\mathrm{H}}_{2}$ beam to the metastable c(2p${)}^{3}$${\mathrm{\ensuremath{\Pi}}}_{\mathit{u}}$ state. Stepwise excitation using two counterpropagating cw single-mode dye laser beams excites the metastable molecule first to an intermediate state [(3d${)}^{3}$\ensuremath{\Sigma} or (3d${)}^{3}$\ensuremath{\Pi}] and then to a triplet nf Rydberg state. The linewidths for the nf Rydberg states give the autoionization rates, which agree satisfactorily with the polarizability\char21{}quadrupole-moment long-range interaction model. We also have measured the transition frequencies between these states to an accuracy of 0.002 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. We use these measurements to derive the ionization potential of the metastable triplet state to an accuracy of 0.020 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ and the energy difference between the metastable and ground states of ${\mathrm{H}}_{2}$ to an accuracy of 0.025 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$.

Published
1990

37. Exclusive and inclusive decays ofBmesons intoDsmesons

Author

D. Bortoletto, M. Goldberg, N. Horwitz, V. Jain, M. D. Mestayer, G. C. Moneti, V. Sharma, I. P. J. Shipsey, T. Skwarnicki, M. Thulasidas, S. E. Csorna, T. Letson, J. Alexander, M. Artuso, C. Bebek, K. Berkelman, D. G. Cassel, E. Cheu, D. M. Coffman, G. Crawford, J. W. DeWire, P. S. Drell, R. Ehrlich, R. S. Galik, B. Gittelman, S. W. Gray, A. M. Halling, D. L. Hartill, B. K. Heltsley, J. Kandaswamy, N. Katayama, D. L. Kreinick, J. D. Lewis, N. B. Mistry, J. Mueller, R. Namjoshi, S. Nandi, E. Nordberg, C. O’Grady, D. Peterson, M. Pisharody, D. Riley, M. Sapper, A. Silverman, S. Stone, H. Worden, M. Worris, A. J. Sadoff, P. Avery, D. Besson, L. Garren, J. Yelton, T. Bowcock, K. Kinoshita, F. M. Pipkin, M. Procario, Richard Wilson, J. Wolinski, D. Xiao, R. Ammar, P. Baringer, D. Coppage, P. Haas, Ha Lam, A. Jawahery, C. H. Park, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, R. Fulton, M. Hempstead, T. Jensen, D. R. Johnson, H. Kagan, R. Kass, F. Morrow, J. Whitmore, P. Wilson, W.-Y. Chen, R. L. McIlwain, J. Dominick, D. H. Miller, C. R. Ng, S. F. Schaffner, E. I. Shibata, W.-M. Yao, K. Sparks, E. H. Thorndike, C.-H. Wang, M. S. Alam, I. J. Kim, W. C. Li, X. C. Lou, C. R. Sun, P.-N. Wang, and M. I. Zoeller

Subjects
Physics, Statistics::Theory, Particle physics, Statistics::Applications, Meson, Branching fraction, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Elementary particle, Particle decay, High Energy Physics::Experiment, Production (computer science), B meson, Boson
Abstract

We have studied the production of ${\mathit{D}}_{\mathit{s}}$ mesons in the decays of B mesons at the \ensuremath{\Upsilon}(4S) resonance. We report on the first observation of exclusive B-meson decays B-g${\mathit{D}}_{\mathit{s}}^{\mathrm{\ensuremath{-}}}$${\mathit{D}}^{\mathrm{*}+}$, B\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}^{\mathrm{\ensuremath{-}}}$${\mathit{D}}^{+}$, and B\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}^{\mathrm{\ensuremath{-}}}$${\mathit{D}}^{0}$. We also present a new measurement of the branching ratio and the momentum spectrum for the inclusive decay B\ensuremath{\rightarrow}${\mathit{D}}_{\mathit{s}}$X.

Published
1990

38. Radiativeϒ(1S)decays

Author

Thomas Ferguson, B. Gittelman, I. J. Kim, R. S. Galik, Y. Kubota, F. Morrow, J. Whitmore, H. Kagan, Daniela Bortoletto, D. L. Hartill, W. M. Yao, V. Sharma, R. Ehrlich, J. W. Dewire, A. Jawahery, A. M. Halling, R. Poling, W. C. Li, E. H. Thorndike, T. Copie, James Alexander, M. Worris, D. G. Cassel, D. L. Kreinick, M. Procario, T. Jensen, F. M. Pipkin, M. Pisharody, J. Byrd, L. Garren, Helmut Vogel, P. Lubrano, Karl Berkelman, A. J. Sadoff, S. Nandi, D. Xiao, Xinchou Lou, Themistocles Bowcock, Ian Shipsey, M. S. Alam, S. E. Csorna, C. Bebek, J. Dominick, Richard Wilson, M. Sapper, John Yelton, K. Sparks, W. Y. Chen, C. R. Ng, D. Perticone, D. Riley, Ian Brock, D. R. Johnson, R. Kowalewski, T. Skwarnicki, M. Hempstead, Persis S. Drell, A. Silverman, P. Haas, James Mueller, K. Kinoshita, C. H. Park, Marina Artuso, D. Besson, Philip Baringer, Elliott Cheu, H. Worden, Glen D. Crawford, N. B. Mistry, N. Horwitz, R. L. McIlwain, N. Katayama, D. M. Coffman, M. D. Mestayer, E. Blucher, B. K. Heltsley, R. Namjoshi, C. O'Grady, J. Kandaswamy, D. Peterson, R. Fulton, T. Letson, D. H. Miller, E. Nordberg, J. Wolinski, M. Goldberg, Ha Lam, Sheldon Stone, Paul Avery, J. D. Lewis, C. R. Sun, R. D. Kass, G. C. Moneti, E. I. Shibata, and S. W. Gray

Subjects
Physics, Crystallography, Particle physics, Angular distribution, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Radiative transfer, Elementary particle, Quarkonium, Boson
Abstract

We report on a study of exclusive radiative decays of the {Upsilon}(1{ital S}) resonance. We have considered decays into final states of the form {Upsilon}{r arrow}{gamma}{ital n}({ital h}{sup +}{ital h}{sup {minus}}), with ({ital h}{sup +}{ital h}{sup {minus}}) denoting a charged-hadron pair (either {pi}{sup +}{pi}{sup {minus}},{ital K}{sup +}{ital K}{sup {minus}}, or {ital p{bar p}}), and {ital n} denoting the number of such pairs in the event. We measure branching ratios for {ital n}=2, 3, and 4, and search for structure in the recoiling hadronic system. For the {ital n}=1 case, we present upper limits. No evidence is observed for two-body radiative decays of the {Upsilon}(1{ital S}) meson in any of the above channels.

Published
1990

39. P-wave charmed mesons ine+e−annihilation

Author

M. Procario, R. S. Galik, R. Fulton, Y. Kubota, D. Riley, L. Garren, J. K. Nelson, R. L. McIlwain, Ian Shipsey, E. Nordberg, A. Silverman, C. Bebek, C. H. Park, D. L. Hartill, S. F. Schaffner, Daniela Bortoletto, N. B. Mistry, R. Poling, Ha Lam, M. Hempstead, W. Y. Chen, H. Worden, K. Sparks, J. D. Lewis, G. C. Moneti, D. G. Cassel, C. R. Ng, M. Sapper, J. W. Dewire, C. R. Sun, E. I. Shibata, R. D. Kass, Richard Wilson, C. O'Grady, F. Morrow, E. H. Thorndike, Marina Artuso, F. M. Pipkin, M. Pisharody, Karl Berkelman, N. Katayama, M. S. Alam, James Alexander, J. Kandaswamy, A. M. Halling, N. Horwitz, Themistocles Bowcock, R. Namjoshi, D. M. Coffman, Sheldon Stone, W. C. Li, S. Nandi, Paul Avery, M. D. Mestayer, T. Jensen, M. Worris, Persis S. Drell, D. Peterson, B. K. Heltsley, J. Whitmore, T. Letson, D. H. Miller, B. Gittelman, J. Wolinski, Xinchou Lou, S. E. Csorna, D. Besson, I. J. Kim, K. Kinoshita, D. R. Johnson, M. Goldberg, A. Jawahery, R. Ammar, V. Sharma, R. Ehrlich, H. Kagan, D. L. Kreinick, T. Skwarnicki, J. Dominick, D. Xiao, A. J. Sadoff, D. Perticone, Elliott Cheu, Glen D. Crawford, P. Haas, James Mueller, Philip Baringer, John Yelton, W. M. Yao, and S. W. Gray

Subjects
Physics, Particle physics, Annihilation, Meson, Electron–positron annihilation, Mass spectrum, State (functional analysis), Cornell Electron Storage Ring
Abstract

Author(s): Avery, P; Besson, D; Garren, L; Yelton, J; Bowcock, T; Kinoshita, K; Pipkin, FM; Procario, M; Wilson, R; Wolinski, J; Xiao, D; Ammar, R; Baringer, P; Haas, P; Lam, H; Jawahery, A; Park, CH; Nelson, JK; Perticone, D; Poling, R; Chen, W; Dominick, J; McIlwain, RL; Miller, DH; Ng, CR; Schaffner, SF; Shibata, EI; Yao, W; Sparks, K; Thorndike, EH; Alam, MS; Kim, IJ; Li, WC; Lou, XC; Sun, CR; Fulton, R; Hempstead, M; Jensen, T; Johnson, DR; Kagan, H; Kass, R; Morrow, F; Whitmore, J; Bortoletto, D; Goldberg, M; Horwitz, N; Mestayer, MD; Moneti, GC; Sharma, V; Shipsey, IP; Skwarnicki, T; Csorna, SE; Letson, T; Alexander, J; Artuso, M; Bebek, C; Berkelman, K; Cassel, DG; Cheu, E; Coffman, DM; Crawford, G; DeWire, JW; Drell, PS; Ehrlich, R | Abstract: Using the CLEO detector at the Cornell Electron Storage Ring, we have found evidence for L=1 charmed mesons in e+e- annihilations. We observe a D**0 state at mass 2461±3±1 MeV/c2 and width 20-12-10+9+9 MeV/c2 decaying to D+-. We also see an enhancement in the m(D*+-)-m(D*+) mass-difference spectrum and by examining D*+ decay-angle dependence, we see structure consistent with two states decaying to D*+-. We observe a lower-mass state, at mass (2428±3±2) MeV/c2 and width (23-6-4+8+10) MeV/c2, assuming that the higher-mass component is from the decay D**0(2461)D*+-. We present arguments for the spin-parity assignments of these states. We also report observation of candidate L=1 cs» state decaying to D*+Ks0. © 1990 The American Physical Society.

Published
1990

40. Observation ofB-meson semileptonic decays to noncharmed final states

Author

W. M. Yao, J. D. Lewis, M. Thulasidas, H. Kagan, A. M. Halling, M. Procario, R. Ehrlich, James Mueller, D. L. Kreinick, C. Bebek, Philip Baringer, A. J. Sadoff, M. Worris, Pu Wang, Cong Wang, R. Fulton, Daniela Bortoletto, Ian Shipsey, D. Z. Besson, J. Kandaswamy, D. R. Johnson, K. Sparks, John Yelton, J. W. Dewire, Xinchou Lou, D. G. Cassel, R. Ammar, T. Letson, D. M. Coffman, D. L. Hartill, E. I. Shibata, D. Peterson, R. Namjoshi, B. K. Heltsley, Ha Lam, C. R. Ng, P. S. Drell, W. Y. Chen, S. W. Gray, A. Silverman, Marina Artuso, Thomas Ferguson, R. Poling, E. Nordberg, P. Wilson, Elliott Cheu, N. Horwitz, J. Whitmore, L. Garren, D. Perticone, M. Hempstead, Glen D. Crawford, Vipul Jain, B. Gittelman, C. H. Park, T. Jensen, Janice Nelson, M. Sapper, I. J. Kim, N. B. Mistry, J. Wolinski, H. Worden, A. Jawahery, M. Pisharody, Karl Berkelman, Soumitra Nandi, C. O'Grady, C. R. Sun, R. D. Kass, Sheldon Stone, Paul Avery, M. D. Mestayer, E. H. Thorndike, F. M. Pipkin, T. J. V. Bowcock, D. Coppage, R. L. McIlwain, R. S. Galik, M. S. Alam, P. Haas, N. Katayama, T. Skwarnicki, M. Goldberg, G. C. Moneti, Vivek Sharma, S.F. Schaffner, Wei Li, D. H. Miller, J. Alexander, Richard Wilson, F. Morrow, D. Xiao, S. E. Csorna, M. I. Zoeller, K. Kinoshita, D. Riley, I. C. Brock, and Yuichi Kubota

Subjects
Semileptonic decay, Physics, Particle decay, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, B meson, Quarkonium
Abstract

We report the first evidence of charmless semileptonic decays of {ital B} mesons. In the momentum interval 2.4--2.6 GeV/{ital c} where the background from {ital b}{r arrow}{ital cl}{nu} is negligible, the average of the measured {ital b}{r arrow}{ital ue}{nu} and {ital b}{r arrow}{ital u}{mu}{nu} partial branching ratios is {Delta}{ital B}{sub {ital ub}}(2.4,2.6) =(1.8{plus minus}0.4{plus minus}0.3){times}10{sup {minus}4}. Inclusion of data from the interval 2.2--2.4 GeV/{ital c}, where the lepton yield is dominated by {ital b}{r arrow}{ital cl}{nu}, gives {Delta}{ital B}{sub {ital ub}}(2.2,2.6) =(3.3{plus minus}0.8{plus minus}0.8){times}10{sup {minus}4}. {vert bar}{ital V}{sub {ital ub}}/V{sub cb}{vert bar} depends on the theoretical model of {ital b}{r arrow}{ital ul}{nu} decay and is approximately 0.1.

Published
1990

41. Nuclear decay following deep inelastic scattering of 470 GeV muons

Author

R. W. Finlay, S. Magill, Janet Conrad, Timothy J. Carroll, K. Olkiewicz, K. P. Schüler, G. Siegert, W. Dougherty, B. Baller, U. Ecker, I. Derado, S. Wolbers, R. B. Nickerson, H. Venkataramania, M. Erdmann, R. S. Guo, K. A. Griffioen, Richard Wilson, F. S. Dietrich, G. Y. Fang, H. M. Braun, Shuichi Kunori, A. Manz, V. Papavassiliou, R. A. Swanson, H. Schellman, H. Breidung, E. J. Ramberg, V. W. Hughes, K. Hicks, P. Stopa, Jan Figiel, F. M. Pipkin, C. Halliwell, D. G. Michael, G. A. Snow, C. W. Salgado, D. H. Potterveld, R. Davisson, S. Söldner-Rembold, W. Wittek, Jorge G. Morfin, Tiefu Zhao, A. Zghiche, M. D. Baker, B. Pawlik, L.S. Osborne, H. E. Jackson, D. McLeod, D. Hantke, H. G. E. Kobrak, E. R. Kinney, A. Banerjee, P. Spentzouris, R. Otten, J. J. Ryan, J. J. Lord, H. E. Stier, H. L. Melanson, Mark Raymond Adams, T. Dreyer, T. Kirk, Norbert Schmitz, D. A. Averill, S. O'Day, M. Wilhelm, R. D. Kennedy, P. Madden, S. Kaufman, H. L. Clark, J. Haas, A. A. Bhatti, D. M. Jansen, S. Aïd, Wit Busza, H. J. Gebauer, A. Salvarani, Z. Jin, Michael Schmitt, Andris Skuja, V. Eckardt, H. E. Montgomery, Henry Lubatti, G. Jancso, P. L. Anthony, D. E. Jaffe, U. Bratzler, D. F. Geesaman, S. K. Dhawan, A. Röser, and A. V. Kotwal

Subjects
Nuclear reaction, Physics, Muon, Nuclear Theory, General Physics and Astronomy, Inelastic scattering, Deep inelastic scattering, Nuclear physics, Deuterium, Neutron, High Energy Physics::Experiment, Atomic physics, Nucleon, Nuclear Experiment, Radioactive decay
Abstract

We detected 1-10 MeV neutrons at laboratory angles from 80° to 140° in coincidence with 470 GeV muons deep inelastically scattered from H, D, C, Ca, and Pb targets. The neutron energy spectrum for Pb can be fitted with two components with temperature parameters of 0.7 and 5.0 MeV. The average neutron multiplicity for 40

Published
1995

42. Shadowing in Inelastic Scattering of Muons on Carbon, Calcium and Lead at Low XBj

Author

H. M. Braun, A. Salvarani, G. Jancso, K. P. Schüler, P. L. Anthony, Z. Jin, H. Venkataramania, F. S. Dietrich, H. Breidung, E. J. Ramberg, Janet Conrad, W. Wittek, Timothy J. Carroll, E. R. Kinney, M. Erdmann, J. Novak, U. Bratzler, J. J. Lord, T. Kirk, K. Hicks, H. E. Stier, D. A. Averill, G. A. Snow, W. Dougherty, L.S. Osborne, A. Zghiche, P. Stopa, H. G. E. Kobrak, Wit Busza, N. Schmitz, H. J. Gebauer, A. Banerjee, S. Magill, K. A. Griffioen, A. A. Bhatti, M. R. Adams, R. D. Kennedy, Henry Lubatti, G. Y. Fang, V. Papavassiliou, Andris Skuja, Shuichi Kunori, Satish Dhawan, C. Halliwell, D. E. Jaffe, R. B. Nickerson, B. Baller, R. A. Swanson, H. Schellman, F. M. Pipkin, J. J. Ryan, H. E. Jackson, U. Ecker, V. Eckardt, P. Madden, H. L. Clark, Michael Schmitt, H. E. Montgomery, D. H. Potterveld, T. Dreyer, D. F. Geesaman, Jorge G. Morfin, D. M. Jansen, V. W. Hughes, C. W. Salgado, J. Haas, S. Söldner-Rembold, Jan Figiel, I. Derado, Tiefu Zhao, S. Wolbers, H. L. Melanson, R. Otten, S. B. Kaufman, K. Olkiewicz, B. Pawlik, D. McLeod, A. Manz, G. Siegert, P. Spentzouris, M. D. Baker, D. Hantke, R. Davisson, Roger W. Finlay, Richard Wilson, A. Röser, D. G. Michael, S. O'Day, M. Wilhelm, R. S. Guo, S. Aïd, and A. V. Kotwal

Subjects
Physics, Muon, Physics and Astronomy (miscellaneous), chemistry.chemical_element, FOS: Physical sciences, Calcium, Inelastic scattering, High Energy Physics - Experiment, Momentum, Nuclear physics, High Energy Physics - Experiment (hep-ex), Deuterium, chemistry, High Energy Physics::Experiment, Fermilab, Atomic physics, Nuclear Experiment, Engineering (miscellaneous), Carbon
Abstract

Nuclear shadowing is observed in the per-nucleon cross-sections of positive muons on carbon, calcium and lead as compared to deuterium. The data were taken by Fermilab experiment E665 using inelastically scattered muons of mean incident momentum 470 GeV/c. Cross-section ratios are presented in the kinematic region 0.0001 < XBj, 22 pages, incl. 6 figures, to be published in Z. Phys. C

Published
1995

43. PRODUCTION OF CHARGED HADRONS BY POSITIVE MUONS ON DEUTERIUM AND XENON AT 490 GEV

Author

K. Dziunikowska, S. Magill, R. B. Nickerson, Jim Hanlon, J. J. Lord, A. Salvarani, S. K. Dhawan, M. Aderholz, M. Erdmann, W. Wittek, G. A. Snow, T. Dreyer, H. G. E. Kobrak, Janet Conrad, B. Pawlik, R. Davisson, A. Röser, Henry Lubatti, W. Dougherty, D. M. Jansen, J. Haas, D. G. Michael, V. W. Hughes, S. Söldner-Rembold, S. Krzywdzinski, J. F. Bartlett, I. Derado, W. Mohr, Tiefu Zhao, M. Wilhelm, Shuichi Kunori, C. W. Salgado, T. J. Caroll, S. B. Kaufman, H. L. Melanson, J. Wilkes, Jan Figiel, G. Jancso, G. Coutrakon, H. E. Jackson, M. C. Green, S. Aïd, Mark Raymond Adams, H. E. Stier, S. Wolbers, H. J. Trost, R. L. Talaga, L.S. Osborne, F. M. Pipkin, U. Ecker, V. Papavassiliou, A. Manz, J. J. Ryan, S. O'Day, K. Olkiewicz, D. F. Geesaman, P. L. Anthony, E. J. Ramberg, Ronald Gilman, Richard Wilson, H. Venkataramania, H. M. Braun, Andris Skuja, A. A. Bhatti, C. Halliwell, V. Eckardt, H. E. Montgomery, M. D. Baker, D. Hantke, H. J. Seyerlein, P. Stopa, R. D. Kennedy, T. Kirk, A. Eskreys, R. A. Swanson, P. H. Steinberg, H. Schellman, Jorge G. Morfin, K. P. Schüler, Norbert Schmitz, Wit Busza, Michael Schmitt, S. Tentindo-Repond, H. J. Gebauer, D. E. Jaffe, P. Malecki, and D. McLeod

Subjects
Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Hadron, Tevatron, Elementary particle, Deep inelastic scattering, Charged particle, Nuclear physics, Physics::Accelerator Physics, Rapidity, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, Engineering (miscellaneous)
Abstract

Results on the production of charged hadrons in muon-deuteron and muon-xenon interactions are presented. The data were taken with the E665 spectrometer, which was exposed to the 490 GeV muon beam of the Tevatron at Fermilab. The use of a streamer chamber as vertex detector provides nearly 4π acceptance for charged particles. The μD data are compared with the μXe data in terms of multiplicity distributions, average multiplicities, forward-backward multiplicity correlations, rapidity and transverse momentum distributions and of two-particle rapidity correlations of charged hadrons. The data cover a range of invariant hadronic masses W from 8 to 30 GeV. © 1994 Springer-Verlag.

Published
1994

44. Measurements of semileptonic branching fractions of B mesons at the Upsilon (4S) resonance

Author

F. Morrow, D. Besson, D. G. Cassel, V. Romero, J. K. Nelson, W. C. Li, Maurice Garcia-Sciveres, T. Jensen, K. Sparks, C. Bebek, Marina Artuso, M. S. Alam, V. Jain, M. Procario, Sheldon Stone, E. H. Thorndike, J. Kandaswamy, F. M. Pipkin, P. S. Drell, M. Modesitt, K. Honscheid, J. Wolinski, D. Coppage, Hubert Kroha, C. R. Sun, R. D. Kass, A. M. Halling, J. P. Alexander, T. Haupt, R. Kowalewski, M. Saulnier, M. Goldberg, N. Horwitz, Daniela Bortoletto, Chunjie Wang, R. S. Galik, Ha Lam, J. W. Dewire, D. L. Hartill, R. Poling, G. C. Moneti, Karl Berkelman, M. D. Mestayer, M. M. Zoeller, E. I. Shibata, B. Geiser, Elliott Cheu, J. Whitmore, R. Kennett, M. L. Kelly, B. Gittelman, G. Crawford, I. J. Kim, S. W. Gray, S. E. Csorna, D. N. Brown, K. Kinoshita, R. Malchow, N. Kwak, T. Letson, D. H. Miller, R. L. McIlwain, A. V. Barnes, S. Schrenk, H. Kagan, D. R. Johnson, M. Thusalidas, R. Davis, D. L. Kreinick, J. Dominick, M. Battle, D. M. Coffman, B. K. Heltsley, R. Ammar, P. N. Wang, N. Katayama, Ian Shipsey, T. E. Browder, P. Wilson, Tomasz Skwarnicki, R. Fulton, S. Henderson, G. Zhu, D. Xiao, S. F. Schaffner, J. Bartelt, Yuichi Kubota, R. Ehrlich, S. Ro, Richard Wilson, P. Rubin, D. Perticone, Yoram Rozen, W. M. Yao, P. Haas, Philip Baringer, and B. Nemati

Subjects
Physics, Particle physics, Muon, Meson, Branching fraction, Electron–positron annihilation, Hadron, Theoretical models, B meson
Abstract

We report new measurements of semileptonic branching fractions of $B$ mesons produced at the $\ensuremath{\Upsilon}(4S)$ resonance determined by fitting the inclusive electron and muon momentum spectra to different theoretical models. Using $B(\overline{B}\ensuremath{\rightarrow}X{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}})$ to denote the average of the semileptonic branching fractions for $B$ decay to electrons and muons, we obtain $B(\overline{B}\ensuremath{\rightarrow}X{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}})=(10.5\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.4)%$ using the refined free-quark model of Altarelli et al., and $B(\overline{B}\ensuremath{\rightarrow}X{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}})=(11.2\ifmmode\pm\else\textpm\fi{}0.3\ifmmode\pm\else\textpm\fi{}0.4)%$ using a modified version of the form-factor model of Isgur et al., in which the ${D}^{**}{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}}$ contribution is allowed to float in the fit. The average of these two results is $B(\overline{B}\ensuremath{\rightarrow}X{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}})=(10.8\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.4\ifmmode\pm\else\textpm\fi{}0.4)%$, where the errors are statistical, systematic uncertainties in the measurement, and systematic uncertainties associated with the theoretical models, respectively. Semileptonic branching fractions as low as this are difficult to accommodate in theoretical models where hadronic $B$-meson decays arise only from spectator diagrams. We use dilepton yields to limit the uncertainty in the semileptonic branching fraction due to the possible existence of non-$B\overline{B}$ decays of the $\ensuremath{\Upsilon}(4S)$. In addition, we tag neutral $B$ mesons using the decays ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{*+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and ${\overline{B}}^{0}\ensuremath{\rightarrow}{D}^{*+}{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}}$ to obtain the first direct measurement of semileptonic branching fractions for neutral $B$ mesons; the average of the electron and muon results for neutral $B$ mesons is $B({\overline{B}}^{0}\ensuremath{\rightarrow}X{\ensuremath{\ell}}^{\ensuremath{-}}\overline{\ensuremath{\nu}})=(9.9\ifmmode\pm\else\textpm\fi{}3.0\ifmmode\pm\else\textpm\fi{}0.9)%$.

Published
1992

45. Inclusive and exclusive decays of B mesons to final states including charm and charmonium mesons

Author

B. Nemati, F. Morrow, D. Besson, J. Mevissen, Harris Kagan, M. Thusalidas, J. Kandaswamy, W. C. Li, Mats A Selen, F. M. Pipkin, M. Goldberg, A. J. Sadoff, E. H. Thorndike, T. Jensen, Daniela Bortoletto, N. Kwak, J. Whitmore, D. Peterson, L. Garren, Ron Poling, C. O'Grady, D. L. Hartill, Richard Wilson, B. Geiser, D. M. Coffman, K. Honscheid, N. Horwitz, M. D. Mestayer, Tomasz Skwarnicki, T. Haupt, Maurice Garcia-Sciveres, D. Coppage, J. Masui, Chunjie Wang, B. K. Heltsley, J. P. Alexander, C. R. Ng, R. Davis, D. Perticone, M. M. Zoeller, Elliott Cheu, M. Sapper, K. K. Gan, G. Crawford, Ian Shipsey, Y. Zhu, T. Letson, D. H. Miller, T. E. Browder, R. L. McIlwain, Yoram Rozen, V. Romero, R. Malchow, J. K. Nelson, B. Gittelman, G. Zhu, W. M. Yao, John Yelton, P. Haas, M. L. Kelly, R. S. Galik, S. W. Gray, S. Nandi, R. Ammar, G. C. Moneti, I. J. Kim, D. L. Kreinick, R. Fulton, A. V. Barnes, S. Schrenk, P. Wilson, D. Riley, S. E. Csorna, E. I. Shibata, N. Katayama, Philip Baringer, J. Wolinski, V. Jain, D. G. Cassel, P. N. Wang, S. F. Schaffner, M. Modesitt, M. Procario, K. Kinoshita, J. Bartelt, A. Silverman, P. S. Drell, E. Nordberg, J. Dominick, D. R. Johnson, M. Pisharody, Karl Berkelman, Jorge Luis Rodriguez, G. S. Ludwig, Ha Lam, M. Battle, H. Worden, M. S. Alam, Hubert Kroha, P. Rubin, Yuichi Kubota, D. Xiao, V. Sharma, D. N. Brown, C. Bebek, R. Ehrlich, K. Sparks, S. Ro, A. P. Freyberger, Marina Artuso, A. M. Halling, M. Worris, N. B. Mistry, Sheldon Stone, Paul Avery, J. D. Lewis, C. R. Sun, and R. D. Kass

Subjects
Physics, Particle physics, Meson, Branching fraction, Computer Science::Information Retrieval, Electron–positron annihilation, Hadron, Quarkonium, Nuclear physics, Particle decay, Pion, High Energy Physics::Experiment, B meson, Nuclear Experiment
Abstract

We have studied hadronic decays of {ital B} mesons. We report measurements of exclusive branching ratios of several charm decay modes of {ital B} mesons to final states with a {ital D} or {ital D}{sup *} and one to three charged pions or a charged {rho} and to final states with a {psi} or {psi}{prime}, a kaon, and up to two charged pions. We have also measured inclusive branching ratios for {ital B} decays to {ital D} and {ital D}{sup *} and the spectra of these particles in {ital B} decays. The total charm content in {ital B} decay is found to be (101{plus minus}12)%. The branching ratios and spectra are compared to form-factor models. We extract the parameters {ital a}{sub 1} and {ital a}{sub 2} of the model of Bauer, Stech, and Wirbel and the {ital D}{sub {ital S}} decay constant. The masses of the {ital {bar B}} {sup 0} and {ital B}{sup {minus}} mesons are measured. The mass difference between {ital {bar B}} {sup 0} and {ital B}{sup {minus}} is found to be {minus}0.4{plus minus}0.6{plus minus}0.5 MeV/{ital c}{sup 2}.

Published
1992

46. DISTRIBUTIONS OF CHARGED HADRONS OBSERVED IN DEEP-INELASTIC MUON DEUTERIUM SCATTERING AT 490-GEV

Author

M. Wilhelm, H. Venkataramania, U. Ecker, M. Erdmann, A. Salvarani, S. Söldner-Rembold, S. Krzywdzinski, H. M. Braun, Tiefu Zhao, V. W. Hughes, F. M. Pipkin, Ronald Gilman, P. Stopa, Shuichi Kunori, Jan Figiel, C. Halliwell, S. B. Kaufman, S. Aïd, Richard Wilson, Henry Lubatti, T. Dreyer, E. J. Ramberg, R. B. Nickerson, G. A. Snow, W. Dougherty, Michael Schmitt, S. Tentindo-Repond, J. Haas, G. Jancso, S. O'Day, S. Magill, G. Coutrakon, R. D. Kennedy, W. Wittek, S. K. Dhawan, D. M. Jansen, D. E. Jaffe, D. Hantke, A. Röser, Norbert Schmitz, H. G. E. Kobrak, L. S. Osborne, H. E. Stier, J. J. Ryan, T. Kirk, Jorge G. Morfin, D. F. Geesaman, D. G. Michael, M. C. Green, K. Olkiewicz, H. J. Trost, Wit Busza, K. Dziunikowska, Pa. Malecki, R. Davisson, A. Eskreys, J. J. Lord, V. Papavassiliou, B. Pawlik, R. A. Swanson, P. H. Steinberg, H. Schellman, D. McLeod, Janet Conrad, A. Manz, S. A. Wolbers, J. Wilkes, A. A. Bhatti, K. P. Schüler, H. L. Melanson, Andris Skuja, V. Eckardt, H. E. Montgomery, Mark Raymond Adams, R. L. Talaga, M. D. Baker, H. J. Gebauer, M. Vidal, P. L. Anthony, H. J. Seyerlein, J. F. Bartlett, I. Derado, W. Mohr, Jim Hanlon, and H. E. Jackson

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Muon, Deuterium, Scattering, Hadron, High Energy Physics::Experiment, Center of mass, Inelastic scattering, Deep inelastic scattering, Nuclear Experiment
Abstract

Longitudinal and transverse momentum spectra of final state hadrons produced in deep-inelastic muon-deuterium scattering at incident muon energy of 490 GeV have been measured up to a hadronic center of mass energy of 30 GeV. The longitudinal distributions agree well with data from earlier muon-nucleon scattering experiments; these distributions tend to increase in steepness as the center of mass energy increases. Comparisons with e + e − data at comparable center of mass energies indicate slight differences. The transverse momentum distributions show an increase in mean p T 2 with an increase in the center of mass energy.

Published
1991

47. High precision isotope shift measurement in helium

Author

John Lawall, F. M. Pipkin, and Ping Zhao

Subjects
Helium-4, Isotope, chemistry, Helium-3, Atom, Kinetic isotope effect, chemistry.chemical_element, Physics::Atomic Physics, Atomic physics, Nuclear Experiment, Spectroscopy, Isotopes of helium, Helium
Abstract

This paper reports a high precision measurement of the isotope shift for the 23S‐23P transition between 3He and 4He by a laser‐microwave spectroscopy technique. This experiment gives the most precise measurement of the isotope shift for a multielectron atom. The measured isotope shift agrees satisfactorily with the theoretical value.

Published
1991

48. Erratum: Nuclear Decay Following Deep Inelastic Scattering of 470 GeV Muons [Phys. Rev. Lett. 74, 5198 (1995)]

Author

T. Dreyer, J. Haas, P.L. Anthony, Tiefu Zhao, R. Otten, S. B. Kaufman, G. Y. Fang, H. M. Braun, H. E. Stier, P. Madden, A. Zghiche, H. L. Clark, R. B. Nickerson, M. D. Baker, S. Magill, D. M. Jansen, Roger W. Finlay, G. A. Snow, A. Manz, S. Söldner-Rembold, A. Banerjee, H. E. Jackson, T. Kirk, D. E. Jaffe, D. Hantke, B. Baller, Shuichi Kunori, K. Hicks, W. Dougherty, Richard Wilson, K. A. Griffioen, A. V. Kotwal, I. Derado, U. Ecker, K. P. Schüler, F. M. Pipkin, G. Siegert, Janet Conrad, Timothy J. Carroll, Jan Figiel, A. Salvarani, W. Wittek, D. McLeod, R. A. Swanson, H. Schellman, E. R. Kinney, J. J. Lord, D. A. Averill, H. Breidung, H. G. E. Kobrak, S. O'Day, Z. Jin, K. Olkiewicz, Andris Skuja, A. Röser, A. A. Bhatti, E. J. Ramberg, Martin Erdmann, V. Eckardt, H. E. Montgomery, U. Bratzler, L.S. Osborne, Jorge G. Morfin, M. R. Adams, N. Schmitz, S. Wolbers, D. G. Michael, Satish Dhawan, V. Papavassiliou, R. Davisson, C. Halliwell, M. Wilhelm, R. S. Guo, P. Spentzouris, H. Venkataramania, F. S. Dietrich, S. Aïd, P. Stopa, R. D. Kennedy, D. F. Geesaman, H. L. Melanson, V. W. Hughes, J. J. Ryan, C. W. Salgado, B. Pawlik, Henry Lubatti, G. Jancso, Wit Busza, Michael Schmitt, D. H. Potterveld, and H. J. Gebauer

Subjects
Physics, Particle physics, Muon, General Physics and Astronomy, Inelastic scattering, Deep inelastic scattering, Radioactive decay
Published
1998

49. Electroproduction ofϕMesons

Author

R. Dixon, F. M. Pipkin, G. Galik, S. W. Raither, S.D. Holmes, D. Larson, A. Silverman, R.L. Wagner, and M. Herzlinger

Subjects
Nuclear physics, Physics, Particle physics, Distribution (mathematics), Meson, Hadron, General Physics and Astronomy, Propagator, Elementary particle, Helicity, Square (algebra), Boson
Abstract

We report measurements of the electroproduction of phi mesons from hydrogen at Q/sup 2/ values of 0.23, 0.43, and 0.97 GeV/sup 2/ with t varying from 0.125 to 1.3 GeV/sup 2/ at each Q/sup 2/ point. The data show no evidence for a Q/sup 2/ dependence of the slope of the t distribution; the forward cross section falls with increasing Q/sup 2/ as the square of the phi propagator; the decay angular distributions agree with the predictions of s-channel helicity conservation; and the ratio of the longitudinal to the transverse component increases linearly with Q/sup 2/.

Published
1977

50. Properties of Inclusive Hadron Spectra in Muon-Nucleon Scattering at 150 GeV/c

Author

L. J. Verhey, S. H. Pordes, S. C. Wright, Brittney Gordon, W. A. Loomis, R. H. Heisterberg, R. M. Fine, W. S. C. Williams, T. Kirk, W. D. Shambroom, G. I. Kirkbride, H. S. Matis, Richard Wilson, Nicola Booth, Herbert L. Anderson, W. R. Francis, L. W. Mo, Andris Skuja, L. C. Myrianthopoulos, F. M. Pipkin, R. G. Hicks, T. W. Quirk, and V. K. Bharadwaj

Subjects
Physics, Particle physics, Muon, Proton, High Energy Physics::Phenomenology, Nuclear Theory, Quark model, Hadron, General Physics and Astronomy, Elementary particle, Nuclear physics, Baryon, High Energy Physics::Experiment, Neutron, Nuclear Experiment, Nucleon
Abstract

We have studied muon-produced hadrons from a deuterium target. The structure functions and the charge ratios are reported for neutrons; the transverse momentum and azimuthal distributions are reported for deuterons. The structure function for the neutron is similar to that of the proton. The charge ratio of produced hadrons follows the expectation of a simple spin-1/2 quark model. Transverse-momentum results agree with those at lower energy and are similar to those from hadron--hadron interactions. No azimuthal anisotropy is seen. (AIP)

Published
1976

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