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9 results on '"C. W. Bogart"'

1. Analysis of the decay mode D0 → K−μ+ν

Author

P. Inzani, D. Claes, S. Sarwar, D. L. Puseljic, W. D. Shephard, Stefano Bianco, Cristina Riccardi, A. Spallone, James E Wiss, R. Diaferia, D. J. Harding, James R. Wilson, R. Yoshida, F. Leveraro, Paul Sheldon, G. Boca, M. Vittone, B. O'Reilly, L. Garren, J. S. Kang, E. Meroni, G. P. Grim, John Perry Cumalat, S. Cihangir, Sandra Malvezzi, D. Torretta, Gianluca Alimonti, T. Handler, Alan D. Lopez, V. S. Paolone, L. Cinquini, I. Gaines, Senta Greene, C. W. Bogart, P. L. Frabetti, T. F. Lin, B. Caccianiga, N. M. Cason, J. M. Bishop, A. Zallo, J. F. Ginkel, Marco Giammarchi, Dario Menasce, K. Y. Kim, J. N. Butler, H. Mendez, Paolo Vitulo, J. F. Filasetta, M. Pisharody, E. J. Mannel, B. Gobbi, G. R. Blackett, P. H. Garbincius, D. Buchholz, S. Sala, J. D. Cunningham, P. M. Yager, S. Culy, K. Lingel, Gabriele Gianini, Fabrizio Fabbri, Z. Y. Wu, R. Greene, R. J. Mountain, S. P. Ratti, H. W.K. Cheung, B. G. Cheon, L. Perasso, R. Culbertson, P. H. Kasper, V. Arena, F. Davenport, Randy Ruchti, G. Jaross, Willard Johns, S. Shukla, Stephen A. Gourlay, G. N. Kim, J. K. Busenitz, C. J. Kenney, C. Castoldi, S. Park, A. E. Kreymer, P. Lebrun, M. Di Corato, Luigi Moroni, Robert Gardner, J. A. Swiatek, M. E. Zanabria, C. Dallapicola, M. S. Nehring, G. Bellini, and Daniele Pedrini

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Branching fraction, Analytical chemistry, Charge (physics), Electron
Abstract

Fermilab high-energy photoproduction experiment E687 provides a high statistics sample of the decay mode D + → K ∗0 μ + ν (charge conjugates are implied). Our analysis yields a branching ratio of Γ (D + → K ∗0 μ + ν) Γ (D + → K − π + π + ) = 0.56±0.04±0.06 . The ratios of the form factors governing the decay are measured to be R ν = 1.74 ±0.27±0.28 and R 2 = 0.78±0.18±0.10, implying a polarization of Γ l Γ t = 1.20±0.13 ±0.13 for the electron decay. Finally, we report new limits on the decay modes D + → K − π + μ + ν (nonresonent) and D + → K ∗0 π 0 μ + ν .

Published
1995

2. A measurement of elastic J/ψ photoproduction cross section at Fermilab E687

Author

J. D. Cunningham, James E Wiss, E. Meroni, Gianluca Alimonti, R. W. Gardner, A. E. Kreymer, P. Lebrun, D. J. Harding, F. Leveraro, D. Torretta, Randy Ruchti, Luigi Moroni, M. Di Corato, W. D. Shepard, J. R. Wilson, P. D. Sheldon, D. L. Puseljic, A. Sala, R. J. Mountain, L. Perasso, M. Vittone, M. E. Zanabria, R. Culbertson, M. Enorini, N. M. Cason, C. Castoldi, Sandra Malvezzi, Daniele Pedrini, E. J. Mannel, P. L. Frabetti, Alan D. Lopez, Dario Menasce, S. Park, Marco Giammarchi, F. Davenport, P. Inzani, D. Claes, Gianluigi Boca, A. Zallo, Stefano Bianco, Fabrizio Fabbri, John Perry Cumalat, H. W.K. Cheung, Paolo Vitulo, G. Jaross, J. M. Bishop, D. Buchholz, S. Sala, R. Yoshida, K. Lingel, V. S. Paolone, P. H. Kasper, C. J. Kennedy, B. O'Reilly, P. M. Yager, S. Culy, Stephen A. Gourlay, J. K. Busenitz, A. Spallone, C. W. Bogart, J. N. Butler, H. Mendez, P. H. Garbincius, B. Gobbi, G. Bellini, S. P. Ratti, and I. Gaines

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, Model prediction, Nuclear Theory, Elementary particle, J/psi meson, Nuclear physics, Cross section (physics), High Energy Physics::Experiment, Fermilab, Nuclear Experiment
Abstract

Measurements of elastic photoproduction cross sections for the J / ψ meson from 100 GeV to 375 GeV are presented. The results indicate that the cross section increases slowly in this range. The shape of the energy dependence agrees well with the photon-gluon fusion model prediction.

Published
1993

3. Study of D0 → K− μ+ ν in high energy photoproduction

Author

Sandra Malvezzi, P. L. Frabetti, Dario Menasce, M. Vittone, John Perry Cumalat, P. H. Garbincius, R. Yoshida, D. Alliata, R. W. Gardner, J. M. Bishop, James E Wiss, F. Leveraro, Fabrizio Fabbri, P. D. Sheldon, D. Torretta, A. Spallone, E. Meroni, Gianluca Alimonti, N. M. Cason, Marco Giammarchi, Luigi Moroni, C. W. Bogart, J. N. Butler, H. Mendez, C. J. Kennedy, W. D. Shephard, Stefano Bianco, Stephen A. Gourlay, M. Enorini, J. K. Busenitz, S. Culy, J. D. Cunningham, J. R. Wilson, D. L. Puseljic, A. Sala, Paolo Vitulo, B. Gobbi, G. Bellini, A. E. Kreymer, Randy Ruchti, I. Gaines, R. J. Mountain, L. Perasso, R. Culbertson, M. Di Corato, F. Davenport, C. Castoldi, M. E. Zanabria, S. Park, Daniele Pedrini, D. Hazan, P. Inzani, S. P. Ratti, E. J. Mannel, S. Sala, K. Lingel, H. W.K. Cheung, Alan D. Lopez, D. Buchholz, G. Jaross, A. Zallo, D. J. Harding, Willard Johns, P. H. Kasper, and P. Lebrun

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Particle physics, Photon, Muon, chemistry, Mass spectrum, chemistry.chemical_element, Elementary particle, Fermilab, Beryllium
Abstract

We report a measurement of the semimuonic decay D0→K−μ+ν from data taken during the 1987–1988 fixed target run at Fermilab by the E687 Collaboration. We obtain Γ(D0→K−μ+ν)/Γ(D0→K−π+)=0.82±0.13±0.13 and use this result to calculate Γ(D 0 →K ∗− μ + ν)/Γ(D 0 →K − μ + ν)=0.59±0.10±0.13 .

Published
1993

4. Studies of correlations in high energy photoproduction

Author

V. Arena, D. Buccholz, A. Spallone, J. F. Ginkel, R. Yoshida, J. N. Butler, Paolo Vitulo, H. Mendez, Paul Sheldon, J. F. Filasetta, D. J. Harding, S. Sala, B. O'Reilly, F. Leveraro, K. Lingel, J. D. Cunningham, C. J. Kennedy, C. W. Bogart, V. S. Paolone, S. Shukla, James E Wiss, J. S. Kang, G. Jaross, I. Gaines, Willard Johns, P. M. Yager, M. Vittone, P. H. Garbincius, S. Culy, L. Garren, E. Meroni, R. Greene, B. Caccianiga, G. P. Grim, S. Sarwar, Gianluca Alimonti, Senta Greene, K. Y. Kim, A. Zallo, T. F. Lin, Sandra Malvezzi, M. Pisharody, Stephen A. Gourlay, H. W.K. Cheung, James R. Wilson, P. L. Frabetti, J. K. Busenitz, Marco Giammarchi, S. Cihangir, D. Torretta, S. P. Ratti, D. L. Puseljic, A. Sala, Dario Menasce, Alan D. Lopez, B. Gobbi, E. J. Mannel, Gabriele Gianini, Daniele Pedrini, G. Bellini, R. J. Mountain, P. Inzani, L. Perasso, R. Culbertson, D. Claes, T. Handler, P. H. Kasper, W. D. Shephard, Stefano Bianco, Cristina Riccardi, F. Davenport, Z. Y. Wu, Gianluigi Boca, B. G. Cheon, Luigi Moroni, Robert Gardner, Randy Ruchti, J. A. Swiatek, Fabrizio Fabbri, G. N. Kim, A. E. Kreymer, P. Lebrun, M. Di Corato, C. Castoldi, S. Park, N. M. Cason, G. R. Blackett, John Perry Cumalat, L. Cinquini, J. M. Bishop, M. S. Nehring, C. Dallapiccola, and M. E. Zanabria

Subjects
Hadronic decay, Physics, Nuclear and High Energy Physics, High energy, Meson, High Energy Physics::Phenomenology, Nuclear Theory, Spectral line, Nuclear physics, Pair production, Transverse momentum, High Energy Physics::Experiment, Fermilab, Atomic physics, Nuclear Experiment
Abstract

Analysis of data from the Fermilab high energy photoproduction experiment E687 for events containing fully and partially reconstructed pairs of charmed mesons is presented. Correlations from D D pairs are used to study production dynamics.

Published
1993

5. A wide band photon beam at the Fermilab Tevatron to study heavy flavors

Author

N. M. Cason, S. Shukla, J. N. Butler, P. D'Angelo, R. W. Gardner, R. Currier, F. Leveraro, A. E. Kreymer, P. H. Garbincius, J. D. Cunningham, P. Lebrun, D. Buchholz, Stephen A. Gourlay, M. Vittone, B. Caccianiga, S. Cihangir, Daniele Pedrini, R. J. Mountain, L. Perasso, J. K. Busenitz, M. Di Corato, C. W. Bogart, Sandra Malvezzi, D. L. Puseljic, A. Sala, A. Zallo, I. Gaines, P. L. Frabetti, E. J. Mannel, P. H. Kasper, P. Inzani, D. Claes, Dario Menasce, P.F. Manfredi, Marco Giammarchi, S. Sala, Francesco Ragusa, C. Castoldi, G. Jaross, John Perry Cumalat, Willard Johns, S. Park, L. Cinquini, K. Lingel, Fabrizio Fabbri, James E Wiss, C. J. Kennedy, A. Spallone, W. D. Shephard, Stefano Bianco, D. J. Harding, Randy Ruchti, J. M. Bishop, Z. Y. Wu, M. E. Zanabria, E. Meroni, Gianluca Alimonti, S. Culy, R. Justice, R. Yoshida, B. Gobbi, G. Bellini, F. Davenport, H. W.K. Cheung, W.R. Gavaletti, D. Torretta, and Luigi Moroni

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Columbia university, Library science, Wide band, Fermilab, Photon beam, Beam electron, Instrumentation
Abstract

13 Present address: Vector Research Company, 6903 Rockledge Drive, Bethesda, MD 20817, USA . Present address : University of North Carolina-Asheville, Asheville, NC 28804, USA . Present address: STX Inc., 4400 Forbes Blvd ., Lanham, MD 20706, USA . Present address : University of Colorado, Boulder, CO 80309, USA . Present address : Fermilab, Batavia, IL 60510, USA. Present address : Dipartimento di Elettronica, University dl Pavia, Pavia, Italy. Present address : Dipartimento di Fisica Nucleate e Teorica dell'Universita and INFN Pavia, 1-27100 Pavia, Italy Present address : State University of New York, Stony Brook, NY 11794, USA. Present address : NIKHEF-H, 1009 DB, Amsterdam, The Netherlands . Present address : University of Alabama, Tuscaloosa, AL 35487, USA . Present address : Brandeis University, Waltham, MA 02254, USA. Present address : University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Present address : Nevis Labs, Columbia University, Irvington, NY 10533, USA.

Published
1993

6. Description and performance of the Fermilab E687 spectrometer

Author

C. J. Kennedy, P. M. Yager, S. Culy, K. Kephart, D. Torretta, D. Buchholz, T. F. Lin, J. F. Ginkel, B. O'Reilly, G. N. Kim, Randy Ruchti, S. Cihangir, G. Molinari, A. E. Kreymer, Stephen A. Gourlay, V. Russo, N. M. Cason, Fabrizio Fabbri, Sandra Malvezzi, Z. Y. Wu, P. L. Frabetti, J. K. Busenitz, H. W.K. Cheung, V. S. Paolone, R. Currier, Dario Menasce, P. Lebrum, M. Diesburg, E. J. Mannel, J. D. Cunningham, R. Diaferia, James R. Wilson, P. Inzan, P. H. Kasper, P.F. Manfredi, J. N. Butler, J. F. Filasetta, M. Di Corato, S. P. Ratti, G. Schultz, L. Passamonti, B. Gobbi, James E Wiss, A. Spallone, P. D. Sheldon, C. Castoldi, E. Meroni, V. Giordano, G. Bellini, R. W. Gardner, Alan D. Lopez, Gianluca Alimonti, Paolo Vitulo, S. Park, F. Leveraro, P. D'Angelo, John Perry Cumalat, C. W. Bogart, Daniel R Claes, A. Cotta-Ramusino, Gianluigi Boca, J. M. Bishop, I. Gaines, H. Mendez, V. Arena, Marco Giammarchi, E. Erdos, P. H. Garbincius, M. E. Zanabria, G. Jaross, K. Lingel, M. Giardoni, Willard Johns, F. Davenport, S. Shukla, Daniele Pedrini, W. D. Shephard, Stefano Bianco, R. Yoshida, Francesco Ragusa, W.R. Cavaletti, M. Vittone, Cristina Riccardi, J. A. Swiatek, C. Dallapiccola, A. Zallo, Luigi Moroni, R. J. Mountain, L. Perasso, R. Culbertson, B. Baumbaugh, D. J. Harding, D. L. Puseljic, A. Sala, Sten Hansen, R. Justice, R. Tiden, and P. Coteus

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Spectrometer, Meson, Physics::Instrumentation and Detectors, Tracking (particle physics), Charged particle, Particle identification, Baryon, Nuclear physics, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, Instrumentation
Abstract

The magnetic spectrometer and charged particle tracking system used in Fermilab experiment 687 to study the photoproduction and decay of charm particles are described in detail. The photons are produced by a wideband electron beam which can operate at energies up to 600 GeV/ c . The spectrometer consists of a high resolution silicon microstrip detector, a large aperture dipole magnet, proportional chambers, a second large aperture dipole, and more proportional chambers. Three multi-cell threshold Cherenkov counters provide charged particle identification. The tracking system is capable of resolving the secondary decay vertices of charm and beauty mesons and baryons from the primary interaction vertex. It also determines the invariant mass of the multibody final states of particles containing heavy quarks with excellent resolution. The particle identification system allows one to identify kaons and protons present in these final states clearly. This collection of detectors produces very clean signals for charm particles and permits one to make many cross checks of the apparatus. The performance is illustrated for a variety of charm signals. Of particular interest is a description of the tracking through the silicon microstrip detector and its use in isolating downstream decay vertices. Two complementary approaches to the reconstruction of secondary decay vertices are presented and insight is gained by comparing their strengths and weaknesses.

Published
1992

7. Study of D0→KS0π+π− and D0→KS0K+K− in high energy photoproduction

Author

D. Buchholz, P. H. Kasper, Alan D. Lopez, C. W. Bogart, E. Meroni, J. N. Butler, H. Mendez, N. M. Cason, F. Davenport, J. R. Wilson, D. L. Puseljic, Paolo Vitulo, W. D. Shephard, Stefano Bianco, L. Perasso, P. H. Garbincius, P. D. Sheldon, S. P. Ratti, Sandra Malvezzi, P. L. Frabetti, M. Enorini, I. Gaines, John Perry Cumalat, G. Alimonti, A. E. Kreymer, P. Lebrun, D. J. Harding, H. W.K. Cheung, Luigi Moroni, J. M. Bishop, M. Di Corato, C. J. Kennedy, R. J. Mountain, Daniele Pedrini, C. Castoldi, R. Culbertson, G. Bellini, M. E. Zanabria, M. Vittone, S. Park, S. Culy, Stephen A. Gourlay, A. Zallo, J. K. Busenitz, A. Spallone, B. Gobbi, A. Sala, F. L. Fabbri, R. W. Gardner, G. Boca, Marco Giammarchi, E. J. Mannel, S. Sala, K. Lingel, James E Wiss, Randy Ruchti, Dario Menasce, R. Yoshida, J. D. Cunningham, G. Jaross, F. Leveraro, and D. Torretta

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Amplitude, Dalitz plot, Fermilab
Abstract

Analysis of the resonant and non-resonant branching fractions for the decays D 0 →K S 0 π + π − and D 0 →K S 0 K + K − is presented. For the D 0 →K S 0 π + π − decay, a fit to the observed Dalitz plot was performed to determine the complex amplitudes of the sub-component modes. For the D 0 →K S 0 K + K − decay, measurements of the branching ratios D 0 →K S 0 K + K − (inclusive), D 0 →K S 0 φ , and D 0 →K S 0 (K + K − ) non- φ relative to the D 0 →K S 0 π + π − mode are reported. The data were collected by the Fermilab high energy photoproduction experiment E687.

Published
1992

8. Measurement of the decays D0 → π+π+π−π−, D0 → K−K+ and

Author

S. P. Ratti, V. Arena, A. Zallo, F. L. Fabbri, W. D. Shephard, Stefano Bianco, E. J. Mannel, S. Sala, K. Lingel, R. J. Mountain, C. W. Bogart, L. Perasso, R. Culbertson, A. Spallone, P. D. Sheldon, J. N. Butler, H. Mendez, N. M. Cason, C. J. Kennedy, J. R. Wilson, M. Vittone, D. L. Puseljic, A. Sala, Daniele Pedrini, R. Yoshida, R. W. Gardner, Gianluca Alimonti, F. Davenport, Marco Giammarchi, G. Bellini, James E Wiss, F. Leveraro, D. J. Harding, P. Inzani, A. E. Kreymer, P. Lebrun, G. Jaross, Sandra Malvezzi, S. Culy, D. Buchholz, H. W.K. Cheung, P. L. Frabetti, I. Gaines, B. Gobbi, Dario Menasce, M. Di Corato, M. E. Zanabria, Stephen A. Gourlay, J. K. Busenitz, P. H. Garbincius, P. H. Kasper, Alan D. Lopez, C. Castoldi, John Perry Cumalat, Luigi Moroni, S. Park, J. M. Bishop, Paolo Vitulo, J. D. Cunningham, D. Torretta, and Randy Ruchti

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Fermilab
Abstract

We present measurements of the branching ratios for two Cabibbo suppressed decays of the D0 meson, D0 → π+π+π−π− and D0 → K−K+, and for the decay D + s → фπ + π + π − . The physics signals were extracted from a data sample consisting of 60 million triggers, collected by Fermilab Photoproduction Experiment E687 from December 1987 to February 1988. The relative branching ratios are measured to be: Γ(D0 → 4π)/Γ(D0 → K3π) = 0.108±0.024±0.008, Γ(D0 → KK)/Γ(D0 → Kπ) = 0.138±0.027 ±0.010 and Γ( D s → ф3π)/Γ( D s → фπ) = 0.58±0.20±0.10 .

Published
1992

9. Measurement of Λ+c and D+s lifetimes

Author

C. Castoldi, J. N. Butler, B. Gobbi, H. Mendez, S. Park, Gianluca Alimonti, G. Jaross, F. Davenport, C. W. Bogart, A. Spallone, J. D. Cunningham, P. Coteus, A. E. Kreymer, P. Lebrun, I. Gaines, Randy Ruchti, G. Bellini, A. Sala, P. H. Garbincius, M. Di Corato, M. Vittone, Daniele Pedrini, Sandra Malvezzi, A. Zallo, Marco Giammarchi, M. Diesburg, S. P. Ratti, P. L. Frabetti, P. Inzani, D. J. Harding, W. D. Shephard, Stefano Bianco, P. F. Manfredi, C. J. Kennedy, R. Yoshida, Luigi Moroni, S. Sala, N. M. Cason, E. J. Mannel, F. L. Fabbri, M. E. Zanabria, D. Buchholz, S. Culy, P. D. Sheldon, D. Kaplan, P. H. Kasper, J. R. Wilson, Alan D. Lopez, K. Lingel, D. L. Puseljic, R. J. Mountain, L. Perasso, R. Culbertson, Stephen A. Gourlay, J. K. Busenitz, D. Torretta, H. W.K. Cheung, R. W. Gardner, James E Wiss, M. Enorini, John Perry Cumalat, J. M. Bishop, and Dario Menasce

Subjects
Physics, Nuclear and High Energy Physics, chemistry, chemistry.chemical_element, Fermilab, Atomic physics, Beryllium
Abstract

Measurements of the lifetimes of the Λ+c decaying into pK−π+ and of the D+s decaying into φπ+ are presented. The data were accumulated in the Fermilab Wide-Band photoproduction experiment E687. The lifetimes of the Λ+c and the D+s are measured to be (0.20±0.03±3)× 10−12s and (0.50±0.06±0.03) × 10−12s respectively.

Published
1990

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