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1. Driver distraction detection using machine learning techniques

Author: Deepthi M. Pisharody, Binu P. Chacko, and K.P. Mohamed Basheer
Published: 2022

2. Absorbed dose distributions in a tissue-equivalent absorber for bremsstrahlung produced at the beamlines of the European Synchrotron Radiation Facility

Author: P. Berkvens, P.K. Job, M. Pisharody, and P. Colomp
Subjects: Physics, Radiation, Dosimeter, business.industry, Radiochemistry, Bremsstrahlung, Synchrotron radiation, Particle accelerator, Thermoluminescence, law.invention, Calorimeter, Insertion device, Optics, law, Absorbed dose, business
Abstract: The absorbed-dose distributions for bremsstrahlung, incident on a tissue-equivalent phantom, were measured with LiF : Mg,Ti thermoluminescent dosimeters at two insertion device beamlines of the European Synchrotron Radiation Facility (ESRF). The measurements were carried out for two different electron beam energies of 4 and 6 GeV. The corresponding bremsstrahlung spectra and power were measured using a high-resolution lead glass total absorption calorimeter. The results are compared with similar measurements carried out at other facilities. The normalized bremsstrahlung absorbed dose in a cross-sectional area of 100 mm 2 , at a depth of 150 mm of the phantom, was measured as 6.1 and 3.6 kGy h −1 W −1 for the corresponding bremsstrahlung spectra of 4 and 6 GeV.
Published: 2000

3. Absorbed Dose from 7-GeV Bremsstrahlung in a PMMA Phantom

Author: M. Pisharody, E. Semones, and P.K. Job
Subjects: Nuclear and High Energy Physics, Dosimeter, Materials science, business.industry, Radiochemistry, Bremsstrahlung, Advanced Photon Source, Radiation, Imaging phantom, Optics, Nuclear Energy and Engineering, Absorbed dose, Particle beam, business, Storage ring
Abstract: Electron storage rings generate energetic bremsstrahlung photons through radiative interaction of the particle beam with the residual gas molecules and other components inside the storage ring. At the Advanced Photon Source (APS), where the stored beam energy is 7 GeV, bremsstrahlung generated in the straight sections of the insertion devices comes down through the beamlines. The resulting absorbed dose distributions by this radiation in a 300 mm × 300 mm × 300 mm tissue substitute phantom were measured with LiF:Mg, Ti (TLD-700) thermoluminescent dosimeters. The average normalized absorbed dose, in a cross sectional area of 100 mm2 at a depth of 150 mm of the PMMA phantom, was measured as 3.3 × 106 mGy h−1W−1 for a 7-GeV bremsstrahlung spectrum.
Published: 2000

4. Measurement of absorbed dose by 7-GeV bremsstrahlung in a PMMA phantom

Author: M. Pisharody, E. Semones, and P.K. Job
Subjects: Physics, Nuclear and High Energy Physics, Absorbed dose, Bremsstrahlung, Synchrotron radiation, Advanced Photon Source, Radiation, Atomic physics, Particle beam, Instrumentation, Storage ring, Insertion device
Abstract: High-energy electron storage rings generate energetic bremsstrahlung photons through radiative interaction of the particle beam with the residual gas molecules and other components inside the storage ring. At synchrotron radiation facilities, where beamlines are channeled out of the storage ring, a continuous bremsstrahlung spectrum, with a maximum energy of the stored particle beam, will be present. At the advanced photon source (APS), where the stored beam energy is 7 GeV, bremsstrahlung generated in the straight sections of the insertion device beamlines, which are a total of 15.38 m in length, can be significant. The contribution from each bremsstrahlung interaction adds up to produce a narrow mono-directional bremsstrahlung beam that comes down through the insertion device beamlines. The resulting absorbed dose distributions by this radiation in a 300 mm×300 mm×300 mm tissue substitute cube phantom were measured with LiF:Mg,Ti (TLD-700) thermoluminescent dosemeters. The normalized absorbed dose, in a cross-sectional area of 100 mm2 at a depth of 150 mm of the PMMA phantom, was measured as 3.3×106 mGy h−1W−1 for 7-GeV bremsstrahlung spectrum.
Published: 1999

5. Dose measurements of bremsstrahlung-produced neutrons from thick targets

Author: E. Semones, M. Pisharody, and P.K. Job
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Beamline, Equivalent dose, Bremsstrahlung, Dose profile, Advanced Photon Source, Atomic physics, Particle beam, Instrumentation, Storage ring, Insertion device
Abstract: Photons of sufficiently high energies (Eγ≥5–15 MeV) can produce neutrons by means of photonuclear interactions. Bremsstrahlung from high energy electron storage rings, which have an energy range of zero to the maximum energy of the particle beam, can interact with beamline components like beam stops and collimators generating photoneutrons of varying energies. This paper presents the results of simultaneous measurements of bremsstrahlung power and corresponding photoneutron dose equivalent rate at the insertion device beamlines of the Advanced Photon Source, using a lead-glass calorimeter and an Andersson–Braun remmeter. Targets made of Fe, Cu, W, and Pb are placed in the bremsstrahlung beam inside the first optics enclosure of the insertion device beamlines. The photoneutron dose equivalent rates, normalized to bremsstrahlung power, beam current, and storage ring pressure, are measured for the four targets. The photoneutron dose equivalent rates, normalized to the bremsstrahlung power and corrected for systematic variations, are given as 2.2±0.5 rem/h/W for Fe,3.0±0.5 rem/h/W for Cu, 3.8±0.5 rem/h/W for W, and 3.7±0.8 rem/h/W for Pb targets, at a distance of 0.8 m perpendicular from the target center.
Published: 1999

6. Measurement of gas bremsstrahlung from electron storage rings

Author: P.K. Job, R. Stanek, S. Magill, J. Proudfoot, and M. Pisharody
Subjects: Physics, Nuclear and High Energy Physics, Calorimeter (particle physics), Bremsstrahlung, Advanced Photon Source, Undulator, Insertion device, Nuclear physics, Beamline, Physics::Accelerator Physics, Atomic physics, Particle beam, Instrumentation, Storage ring
Abstract: Bremsstrahlung is produced in electron storage rings when the particle beam interacts with the storage ring components or with the residual gas molecules in the storage ring vacuum. The interaction of the particle beam with the gas molecules occurs continuously during storage ring operation. At straight sections of a storage ring, the gas bremsstrahlung contribution from each interaction adds up to produce a narrow monodirectional photon beam that travels down the beamlines. At the Advanced Photon Source (APS), where the stored electron beam energy is 7 GeV, gas bremsstrahlung generated in the straight sections of the insertion device beamlines, which is a total of 15.38 m in effective length, can be significant. This paper presents the results of the bremsstrahlung spectrum and energy measurements from the insertion device beamlines of the APS using a hermetic lead glass calorimeter. The calorimeter consists of 25 lead glass blocks, each 6.3 cm × 6.3 cm × 35 cm, stacked into a 5 × 5 array. Phototubes connected to the lead glass blocks collected the signals. The calorimeter is calibrated using the maximum energy of the observed bremsstrahlung spectrum. The total energy radiated and the bremsstrahlung spectrum were measured as a function of the storage ring beam current for both electrons and positrons of 7 GeV energy. Vacuum in the straight section was continuously monitored, and measurements to determine the nature of the residual gas inside the storage ring were performed. The measured bremsstrahlung spectra are fitted to a function that shows an approximate 1 E behavior. The gas bremsstrahlung rate from the APS undulator beamline straight path of 15.38 m is measured as 60.0 ± 2.0 GeV/s/nT/mA. Significant contribution of bremsstrahlung from sources other than the residual gas molecules is observed. The maximum bremsstrahlung energy measured in a beamline during the experiment is 369.0 ± 22.0 GeV/s/nT/mA.
Published: 1997

7. Analysis of the Cabibbo suppressed decay D0 → π−l+ν

Author: D. L. Puseljic, C. Castoldi, V. Arena, Harry Cheung, G. R. Blackett, D. J. Harding, Z. Y. Wu, N. M. Cason, B. Gobbi, Paolo Vitulo, S. Cihangir, B. G. Cheon, F. Prelz, James E Wiss, T. F. Lin, V. S. Paolone, F. Davenport, W. D. Shephard, Stefano Bianco, F. L. Fabbri, M. Vittone, C. J. Kennedy, G. N. Kim, D. Torretta, Dario Menasce, Cristina Riccardi, L. Perasso, Alan D. Lopez, S. Shukla, R. Culbertson, P. M. Yager, Marco Giammarchi, B. O'Reilly, G. Alimonti, A. E. Kreymer, P. Inzani, John Perry Cumalat, P. Lebrun, A. Zallo, L. Cinquini, S. Sala, Daniele Pedrini, M. Pisharody, M. Di Corato, D. Buchholz, M. S. Nehring, B. Caccianiga, J. M. Bishop, M. Boschini, L. A. Garren, P. H. Kasper, D. Claes, Gabriele Gianini, S. Sarwar, F. Leveraro, W. E. Johns, Randy Ruchti, Paul Sheldon, G. Bellini, J. S. Kang, James R. Wilson, K. Y. Kim, E. Meroni, G. P. Grim, Sandra Malvezzi, P. L. Frabetti, R. Greene, D. Brambilla, K. Danyo, G. Boca, Stephen A. Gourlay, A. Sala, J. F. Ginkel, J. N. Butler, P. H. Garbincius, S. P. Ratti, I. Gaines, Luigi Moroni, T. Handler, L. Viola, C. Dallapiccola, Robert Gardner, and J. A. Swiatek
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Muon, Branching fraction, Analytical chemistry, Electron, Fermilab
Abstract: Results for the Cabibbo suppressed semileptonic decays D 0 → π − e + ν and D 0 → π − μ + ν (charge conjugates are implied) are reported by Fermilab photoproduction experiment E687. We find 45.4 ± 13.3 events in the electron mode and 45.6 ± 11.8 in the muon mode. The relative branching ratio BR (D 0 →π − l + v) BR (D 0 →K − l + v) for the combined sample is measured to be 0.101 ± 0.020 (stat.) ± 0.003 (syst.) 14 .
Published: 1996

8. Charm-anticharm asymmetries in high energy photoproduction

Author: G. N. Kim, J. S. Kang, I. Gaines, S. Shukla, C. Castoldi, S. P. Ratti, S. Sarwar, Sandra Malvezzi, Paolo Vitulo, B. O'Reilly, T. Handler, D. L. Puseljic, A. Sala, P. L. Frabetti, Dario Menasce, John Perry Cumalat, W. E. Johns, Byung Gu Cheon, B. Gobbi, V. S. Paolone, F. Davenport, Harry Cheung, F. Prelz, L. Cinquini, James E Wiss, Daniele Pedrini, P. Inzani, M. Pisharody, D. Claes, L. A. Garren, J. M. Bishop, B. Caccianiga, E. Meroni, G. P. Grim, J. F. Ginkel, Randy Ruchti, S. Cihangir, J. R. Wilson, V. Arena, Alan D. Lopez, W. D. Shephard, Stefano Bianco, Cristina Riccardi, A. E. Kreymer, Gabriele Gianini, P. Lebrun, M. Boschini, M. S. Nehring, P. H. Garbincius, Paul Sheldon, N. M. Cason, R. Culbertson, M. Di Corato, Marco Giammarchi, D. J. Harding, Gianluca Alimonti, Stephen A. Gourlay, L. Perasso, C. Dallapiccola, K. Y. Kim, A. Zallo, G. R. Blackett, D. Buchholz, P. H. Kasper, F. Leveraro, D. Torretta, J. N. Butler, S. Sala, T. F. Lin, C. J. Kennedy, P. M. Yager, M. Vittone, Fabrizio Fabbri, R. Greene, Luigi Moroni, G. Bellini, L. Viola, Robert Gardner, J. A. Swiatek, Z. Y. Wu, D. Brambilla, K. Danyo, and G. Boca
Subjects: Physics, Nuclear and High Energy Physics, High energy, Particle physics, Meson, High Energy Physics::Lattice, media_common.quotation_subject, Nuclear Theory, High Energy Physics::Phenomenology, Asymmetry, Charm quark, Baryon, Nuclear physics, High Energy Physics::Experiment, Fermilab, Nuclear Experiment, media_common
Abstract: We report measurements of charm particle production asymmetries from the Fermilab photoproduction experiment E687. An asymmetry in the rate of production of charm versus anticharm particles is expected to arise primarily from fragmentation effects. We observe statistically significant asymmetries in the photoproduction of D+, D ∗+ and D0 mesons and find small (but statistically weak) asymmetries in the production of the Ds+ meson and the Λc+ baryon. Our inclusive photoproduction asymmetries are compared to predictions from nonperturbative models of charm quark fragmentation.
Published: 1996

9. Study of higher mass charm baryons decaying to Λ+

Author: B. O'Reilly, T. F. Lin, V. S. Paolone, F. Davenport, R. Greene, W. E. Johns, Sandra Malvezzi, C. Castoldi, B. Caccianiga, P. L. Frabetti, D. Buchholz, B. Gobbi, Z. Y. Wu, Dario Menasce, P. Lebrun, Stephen A. Gourlay, K. Y. Kim, F. Prelz, F. L. Fabbri, M. Boschini, B. G. Cheon, James E Wiss, P. H. Garbincius, S. Shukla, F. Leveraro, M. S. Nehring, D. Torretta, D. Brambilla, G. Bellini, S. Sala, P. H. Kasper, C. J. Kennedy, K. Danyo, R. Culbertson, James R. Wilson, L. Viola, Marco Giammarchi, L. Perasso, N. M. Cason, G. R. Blackett, G. Boca, S. Sarwar, T. Handler, M. Vittone, E. Meroni, John Perry Cumalat, G. P. Grim, Gianluca Alimonti, L. A. Garren, V. Arena, L. Cinquini, Alan D. Lopez, P. M. Yager, Luigi Moroni, J. F. Ginkel, Randy Ruchti, Paolo Vitulo, W. D. Shephard, Stefano Bianco, S. Cihangir, J. M. Bishop, Cristina Riccardi, S. P. Ratti, J. S. Kang, Robert Gardner, J. N. Butler, J. A. Swiatek, Daniele Pedrini, D. L. Puseljic, A. Sala, Paul Sheldon, P. Inzani, D. Claes, Harry Cheung, A. Zallo, I. Gaines, D. J. Harding, M. Pisharody, Gabriele Gianini, G. N. Kim, A. E. Kreymer, M. Di Corato, and C. Dallapiccola
Subjects: Baryon, Physics, Nuclear and High Energy Physics, Branching fraction, Analytical chemistry, State (functional analysis), Charm (quantum number), Atomic physics, Lower limit
Abstract: We report on the study of charm baryons decaying to Λ c + : Λ c ★+ (2625) → Λ c + π + π − , Λ c ★+ (2593) → Λ c + π + π − , Σ c 0 → Λ c + π − and Σ c ++ → Λ c + π + . We present a confirmation of the state Λ c ∗+ (2593) and determine its mass difference to be M ( Λ c ★+ (2593)) − M ( Λ c + ) = 309.2 ± 0.7 ± 0.3 MeV/ c 2 . We determine the lower limit on the resonant branching ratio to be BR (Λ c ★+ (2593) → Σ c π ± Λ c ★+ (2593) → Λ c + π + π − ) > 0.51 (90% c.l.). We also measure the mass differences M ( Σ c 0 ) − M ( Λ c + ) = 166.6±0.5±0.6 MeV/ c 2 and M ( Σ c ++ ) − M ( Λ c + ) = 167.6±0.6±0.6 MeV/ c 2 . Finally, we measure the relative photoproduction cross sections for Λ c ★+ and Σ c with respect to the (inclusive) photoproduction cross section for Λ c + .
Published: 1996

10. 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

11. Search for the decay of D+ and D+ mesons to three charged kaons

Author: Robert Gardner, D. L. Puseljic, A. Sala, M. Boschini, P. Inzani, D. Brambilla, K. Danyo, A. Zallo, G. N. Kim, G. Boca, G. Bellini, J. A. Swiatek, James E Wiss, N. M. Cason, Paul Sheldon, S. Sala, B. O'Reilly, A. E. Kreymer, D. J. Harding, P. Lebrun, J. R. Wilson, Gianluca Alimonti, R. Culbertson, J. S. Kang, Luigi Moroni, G. R. Blackett, Randy Ruchti, M. Vittone, W. D. Shephard, Stefano Bianco, M. Pisharody, M. Di Corato, Cristina Riccardi, John Perry Cumalat, S. Shukla, L. Perasso, K. Y. Kim, L. Viola, T. F. Lin, Dario Menasce, Gabriele Gianini, S. P. Ratti, Fabrizio Fabbri, C. Castoldi, J. M. Bishop, Sandra Malvezzi, L. Cinquini, Daniele Pedrini, Marco Giammarchi, P. L. Frabetti, J. F. Ginkel, B. Caccianiga, Z. Y. Wu, D. Buchholz, F. Davenport, C. J. Kennedy, S. Cihangir, L. Garren, E. Meroni, G. P. Grim, B. G. Cheon, S. Sarwar, T. Handler, D. Claes, V. Arena, B. Gobbi, P. H. Kasper, Stephen A. Gourlay, V. S. Paolone, P. M. Yager, Alan D. Lopez, D. Torretta, M. S. Nehring, J. N. Butler, I. Gaines, R. Greene, P. H. Garbincius, F. Leveraro, Willard Johns, H. W.K. Cheung, Paolo Vitulo, C. Dallapiccola, and F. Prelz
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, High energy, Meson, Branching fraction
Abstract: We report the results of a search for the doubly Cabibbo suppressed decays D+ → K+K−K+ and D+ → ΦK+, and the singly Cabibbo suppressed decays Ds+ → K+K−K+ and Ds+ → ΦK+. Our measurements are all consistent with zero branching ratio, and we set 90% confidence level upper limits on the relative D+ branching ratios: BR(ΦK + ) BR(Φπ + ) , BR(K + K − K + ) BR(Φπ + ) and BR(K + K − K + ) BR(K − π + π + ) , and the relative Ds+ branching ratios: BR(ΦK + ) BR(Φπ + ) and BR(K + K − K + ) BR(Φπ + ) . The data were accumulated by the Fermilab high energy photoproduction experiment E687.
Published: 1995

12. Doubly and singly Cabibbo suppressed charm decays into the K+π−π+ final state

Author: M. S. Nehring, S. Sala, M. Vittone, V. S. Paolone, John Perry Cumalat, Willard Johns, Paul Sheldon, James E Wiss, F. Leveraro, D. J. Harding, L. Cinquini, J. F. Ginkel, J. S. Kang, T. F. Lin, J. M. Bishop, L. A. Garren, J. N. Butler, B. Caccianiga, E. Meroni, B. O'Reilly, Sandra Malvezzi, M. Boschini, G. P. Grim, K. Y. Kim, Gianluca Alimonti, P. H. Garbincius, Randy Ruchti, P. L. Frabetti, Marco Giammarchi, F. L. Fabbri, Z. Y. Wu, Alan D. Lopez, A. Zallo, S. Shukla, C. Castoldi, M. Pisharody, Dario Menasce, F. Prelz, V. Arena, B. G. Cheon, I. Gaines, D. Buchholz, G. R. Blackett, N. M. Cason, B. Gobbi, P. H. Kasper, Gabriele Gianini, D. Brambilla, L. Perasso, R. Culbertson, S. Cihangir, G. Boca, James R. Wilson, R. Greene, G. Bellini, G. N. Kim, D. Torretta, T. Handler, A. E. Kreymer, P. Lebrun, M. Di Corato, Daniele Pedrini, P. Inzani, D. Claes, H. W.K. Cheung, L. Viola, S. P. Ratti, W. D. Shephard, Stefano Bianco, Luigi Moroni, Cristina Riccardi, C. J. Kennedy, F. Davenport, Robert Gardner, P. M. Yager, S. Sarwar, D. L. Puseljic, A. Sala, J. A. Swiatek, Stephen A. Gourlay, C. Dallapiccola, and Paolo Vitulo
Subjects: Physics, Nuclear and High Energy Physics, Crystallography
Abstract: Branching ratios and upper limits at 90% confidence level for D+ and Ds+ → K+π−π+ decays collected in Fermilab photoproduction experiment E-687 are reported. The D+ results are: Γ(D + → K + π − π + ) Γ(D + → K − π + π + ) = (7.2 ± 2.3 ± 1.7) × 10 −3 , Γ(D + → K ∗0 (892)π + ) Γ(D + → K − π + π + ) , and Γ(D + → K + ϱ 0 (770)) Γ(D + → K − π + π + ) . The Ds+ results are: Γ(D s + → K + π − π + ) Γ(D s + → Φ(1020)π + ) = 0.28 ± 0.06 ± 0.05 , Γ(D s + → K ∗0 (892)π + Γ(D s + → Φ(1020)π + ) = 0.18 ± 0.05 ± 0.04 , and Γ(D s + → K + ϱ 0 (770)) Γ(D s + → Φ(1020)π + ) .
Published: 1995

13. First measurement of the lifetime of the Ω

Author: G. N. Kim, M. Vittone, L. A. Garren, C. Castoldi, Randy Ruchti, B. Gobbi, D. Brambilla, D. J. Harding, Sandra Malvezzi, James E Wiss, S. Sala, K. Danyo, R. Culbertson, B. Caccianiga, P. L. Frabetti, G. Boca, Daniele Pedrini, M. Boschini, N. M. Cason, F. Prelz, S. Cihangir, C. Dallapiccola, F. Davenport, D. Claes, G. Bellini, Paul Sheldon, E. Meroni, V. Arena, G. P. Grim, R. Greene, Luigi Moroni, D. Buchholz, Marco Giammarchi, G. Alimonti, A. E. Kreymer, P. Lebrun, T. Handler, H. W.K. Cheung, F. L. Fabbri, Senta Greene, S. Shukla, I. Gaines, Dario Menasce, Z. Y. Wu, L. Cinquini, M. Di Corato, P. H. Garbincius, C. J. Kennedy, V. S. Paolone, Robert Gardner, A. Sala, M. S. Nehring, S. P. Ratti, D. Torretta, P. Inzani, J. S. Kang, A. Zallo, P. M. Yager, B. G. Cheon, J. F. Ginkel, P. H. Kasper, John Perry Cumalat, J. A. Swiatek, J. N. Butler, M. Pisharody, Stephen A. Gourlay, F. Leveraro, Willard Johns, Gabriele Gianini, Alan D. Lopez, J. M. Bishop, Paolo Vitulo, L. Viola, James R. Wilson, S. Sarwar, G. R. Blackett, B. O'Reilly, D. L. Puseljic, W. D. Shephard, Stefano Bianco, Cristina Riccardi, L. Perasso, K. Y. Kim, and T. F. Lin
Subjects: Hadronic decay, Physics, Nuclear and High Energy Physics, High energy, Nuclear Theory, chemistry.chemical_element, Sigma, Nuclear physics, Charmed baryons, Baryon, chemistry, High Energy Physics::Experiment, Statistical analysis, Fermilab, Beryllium, Nuclear Experiment
Abstract: We present the first measurement of the lifetime of the Ω c 0 baryon. The data were collected in the Fermilab high energy photoproduction experiment E687. The measured lifetime is τ = 86−20+27(stat.) ± 28(syst.) fr. Thus the Ω c 0 has one of the shorter lifetimes among the weakly decaying singly charmed baryons.
Published: 1995

14. Analysis of the D+, D+ → K+K−π+ Dalitz plots

Author: C. Dallapiccola, F. Davenport, M. Pisharody, Robert Gardner, P. H. Garbincius, Z. Y. Wu, C. Castoldi, D. L. Puseljic, B. Gobbi, S. Shukla, B. G. Cheon, F. Prelz, Alan D. Lopez, Sandra Malvezzi, Gabriele Gianini, L. Garren, E. Meroni, J. A. Swiatek, Stephen A. Gourlay, S. P. Ratti, P. L. Frabetti, G. P. Grim, C. J. Kennedy, T. F. Lin, L. Cinquini, J. F. Ginkel, Luigi Moroni, P. Inzani, P. M. Yager, J. N. Butler, G. R. Blackett, A. Zallo, Daniele Pedrini, M. S. Nehring, B. O'Reilly, John Perry Cumalat, G. Bellini, N. M. Cason, M. Boschini, G. N. Kim, Paolo Vitulo, D. J. Harding, James E Wiss, S. Sala, W. D. Shephard, Stefano Bianco, I. Gaines, D. Buchholz, D. Brambilla, Marco Giammarchi, Randy Ruchti, D. Claes, Cristina Riccardi, G. Alimonti, A. E. Kreymer, S. Cihangir, Paul Sheldon, P. Lebrun, F. Leveraro, L. Viola, V. S. Paolone, M. Vittone, L. Perasso, P. H. Kasper, J. M. Bishop, Willard Johns, M. Di Corato, A. Sala, J. S. Kang, Dario Menasce, G. Boca, Fabrizio Fabbri, B. Caccianiga, D. Torretta, R. Culbertson, R. Greene, S. Sarwar, V. Arena, James R. Wilson, Senta Greene, H. W.K. Cheung, K. Y. Kim, and T. Handler
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Nuclear magnetic resonance, Amplitude, Fermilab, Branching (polymer chemistry)
Abstract: Amplitude analyses of the D+ and Ds+ → K+K−π+ Dalitz plots are presented using data collected by the Fermilab high energy photoproduction experiment E687. Our data are fit to a model consisting of a sum of Breit-Wigner amplitudes for the intermediate two-body resonant decay modes. We extract decay fractions and relative phases. These results are used to infer new branching ratios for D+ → K+K−π+ inclusive as well as the Φπ+ and K ∗ (892) 0 K + channels.
Published: 1995

15. Charm meson decay into the final states K0K+ and KK

Author: M. Pisharody, W. D. Shephard, Stefano Bianco, Alan D. Lopez, Cristina Riccardi, Gabriele Gianini, B. Gobbi, A. Zallo, C. J. Kennedy, T. F. Lin, Luigi Moroni, B. O'Reilly, J. S. Kang, John Perry Cumalat, D. J. Harding, S. Sarwar, D. Buchholz, F. Davenport, D. L. Puseljic, A. Sala, P. M. Yager, L. Cinquini, D. Torretta, P. H. Kasper, F. L. Fabbri, S. Sala, Daniele Pedrini, S. P. Ratti, Marco Giammarchi, N. M. Cason, J. M. Bishop, S. Shukla, Stephen A. Gourlay, R. Greene, P. Inzani, D. Claes, H. W.K. Cheung, Robert Gardner, Sandra Malvezzi, P. L. Frabetti, Dario Menasce, J. A. Swiatek, G. R. Blackett, T. Handler, James R. Wilson, L. Perasso, R. Culbertson, Senta Greene, Willard Johns, S. Cihangir, K. Y. Kim, L. A. Garren, G. Boca, I. Gaines, Randy Ruchti, C. Dallapiccola, J. F. Ginkel, G. Bellini, J. N. Butler, P. H. Garbincius, Paul Sheldon, M. Vittone, A. E. Kreymer, P. Lebrun, Z. Y. Wu, B. G. Cheon, M. Di Corato, V. Arena, James E Wiss, F. Leveraro, G. N. Kim, C. Castoldi, M. S. Nehring, Paolo Vitulo, E. Meroni, G. P. Grim, Gianluca Alimonti, V. S. Paolone, and B. Caccianiga
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Crystallography, High energy, Meson, Branching fraction, Charm (quantum number)
Abstract: We have made a new measurement of the branching ratio Γ(D + → K 0 K + ) Γ(D + → K 0 π + ) and the first measurement of Γ(D + → K 0 K ∗+ ) Γ(D + → K 0 π + ) . The data were accumulated in the 1990–1991 fixed target running period of Fermilab high energy photoproduction experiment E687. We measure Γ(D + → K 0 K + ) Γ(D + → K 0 π + ) = 0.25 ± 0.04 ± 0.02 and Γ(D + → K 0 K ∗+ ) Γ(D + → K 0 π + ) = 1.1 ± 0.3 ± 0.4 .
Published: 1995

16. Branching ratios of the decays and D0 → KS0KS0KS0

Author: C. Castoldi, A. Sala, G. R. Blackett, D. J. Harding, M. S. Nehring, V. Arena, John Perry Cumalat, Senta Greene, J. M. Bishop, B. Caccianiga, M. Vittone, B. Gobbi, G. Alimonti, A. E. Kreymer, P. Lebrun, F. L. Fabbri, R. Culbertson, C. Dallapiccola, Robert Gardner, G. Bellini, Paolo Vitulo, P. Inzani, A. Zallo, S. Sala, S. Cihangir, M. Di Corato, D. Buchholz, M. Pisharody, S. P. Ratti, J. A. Swiatek, G. N. Kim, Z. Y. Wu, C. J. Kennedy, F. Davenport, F. Leveraro, Gabriele Gianini, G. Boca, Luigi Moroni, Willard Johns, B. G. Cheon, N. M. Cason, Sandra Malvezzi, T. Handler, K. Y. Kim, P. H. Kasper, V. S. Paolone, B. O'Reilly, Paul Sheldon, P. L. Frabetti, D. Torretta, L. A. Garren, R. Greene, P. M. Yager, Stephen A. Gourlay, James R. Wilson, Dario Menasce, Randy Ruchti, T. F. Lin, Marco Giammarchi, H. W.K. Cheung, S. Shukla, L. Cinquini, Alan D. Lopez, James E Wiss, D. L. Puseljic, S. Sarwar, W. D. Shephard, Stefano Bianco, J. S. Kang, Cristina Riccardi, I. Gaines, L. Perasso, P. H. Garbincius, E. Meroni, G. P. Grim, Daniele Pedrini, J. F. Ginkel, J. N. Butler, and D. Claes
Subjects: Physics, Nuclear and High Energy Physics, High energy, Crystallography, Atomic physics, Branching (polymer chemistry)
Abstract: The branching ratios of D 0 → K 0 K 0 and D0 → Ks0Ks0Ks0 relative to D 0 → K 0 π + π − are reported. The data were accumulated in the 1990–1991 fixed target running period of the Fermilab high energy photoproduction experiment E687. Γ (D 0 → K 0 K 0 )/Γ (D 0 → K 0 π + π − is measured to be 0.039±0.013±0.013 and Γ (D 0 →K s 0 K s 0 K s 0 )/Γ (D 0 → K 0 π + π − ) is measured to be 0.035±0.012±0.006. We also measure Γ (D 0 → K 0 π + π − /Γ (D 0 → K − π + ) to be 1.61±0.10±0.15.
Published: 1994

17. Observation and mass measurement of

Author: James E Wiss, F. Leveraro, Senta Greene, G. N. Kim, L. Garren, E. Meroni, G. P. Grim, Gianluca Alimonti, W. D. Shephard, Stefano Bianco, James R. Wilson, S. Sarwar, Daniele Pedrini, Cristina Riccardi, K. Y. Kim, L. Perasso, R. Culbertson, Sandra Malvezzi, T. Handler, P. Inzani, D. Claes, C. Castoldi, P. L. Frabetti, B. O'Reilly, G. R. Blackett, Paolo Vitulo, Fabrizio Fabbri, Alan D. Lopez, Marco Giammarchi, D. L. Puseljic, A. Sala, V. S. Paolone, J. S. Kang, Dario Menasce, John Perry Cumalat, L. Cinquini, Willard Johns, A. E. Kreymer, C. Dallapiccola, R. Greene, B. Caccianiga, P. Lebrun, B. Gobbi, G. Bellini, G. Boca, S. P. Ratti, J. M. Bishop, V. Arena, H. W.K. Cheung, D. Buchholz, M. Di Corato, Z. Y. Wu, P. H. Kasper, B. G. Cheon, M. S. Nehring, Paul Sheldon, C. J. Kennedy, P. M. Yager, D. Torretta, M. Pisharody, Gabriele Gianini, J. F. Ginkel, Robert Gardner, S. Sala, J. A. Swiatek, J. N. Butler, T. F. Lin, L. Viola, D. J. Harding, P. H. Garbincius, Luigi Moroni, M. Vittone, A. Zallo, I. Gaines, F. Davenport, Stephen A. Gourlay, N. M. Cason, Randy Ruchti, S. Shukla, and S. Cihangir
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, chemistry, chemistry.chemical_element, Fermilab, Beryllium, Atomic physics, Mass measurement
Abstract: We present evidence for the Ω c 0 in a new decay mode Ω c 0 → Σ + K − K − π + , for which we find 42.5 ± 8.8 events with a mass of 2699.9 ± 1.5 ± 2.5 MeV/c 2 . The data are from Fermilab high energy photoproduction experiment E687.
Published: 1994

18. New results on heavy-flavor photoproduction from the E687 experiment at FNAL

Author: Robert Gardner, G. R. Blackett, Fabrizio Fabbri, M. Pisharody, J. A. Swiatek, M. Vittone, J. F. Filaseta, L. Perasso, R. Culbertson, A. Zallo, Gabriele Gianini, D. Buchholz, W. D. Shephard, Stefano Bianco, Cristina Riccardi, F. Davenport, Randy Ruchti, D. J. Harding, Z. Y. Wu, Luigi Moroni, John Perry Cumalat, V. S. Paolone, S. Cihangir, B. G. Cheon, P. H. Kasper, D. L. Puseljic, A. Sala, Stephen A. Gourlay, T. Handler, N. M. Cason, B. O'Reilly, D. Perdini, L. Cinquini, R. Greene, Alan D. Lopez, James R. Wilson, Senta Greene, J. M. Bishop, J. S. Kang, S. Shukla, S. P. Ratti, H. W.K. Cheung, Willard Johns, P. M. Yager, B. Gobbi, G. Bellini, Paul Sheldon, K. Y. Kim, S. Sarwar, G. N. Kim, C. Dallapiccola, Sandra Malvezzi, M. S. Nehring, P. L. Frabetti, Dario Menasce, T. F. Lin, G. P. Grim, P. Inzani, D. Claes, A. E. Kreymer, D. Torretta, P. Lebrun, S. Sala, M. Di Corato, V. Arena, C. Castoldi, F. Leveraro, J. F. Ginkel, J. N. Butler, G. Boca, C. J. Kennedy, Marco Giammarchi, I. Gaines, P. H. Garbincius, B. Caccianiga, Paolo Vitulo, James E Wiss, L. Garren, E. Meroni, and Gianluca Alimonti
Subjects: Physics, Nuclear physics, Particle physics, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, High Energy Physics::Experiment, Cover (algebra), High statistic, Charm (quantum number), Nuclear Experiment
Abstract: The new results on charm from E687 photoproduction experiment are presented. They follow from very high statistic measurents and cover a wide variety of physics items in the charm sector. Charm photoproduction studies, very accurate lifetime measurements, analysis of several semi-leptonic decays and hadronic decays are discussed. Particular attention has been devoted to compare E687 results with other experiments.
Published: 1994

19. Search forCPviolation in charm meson decay

Author: L. A. Garren, D. Buchholz, N. M. Cason, P. H. Kasper, G. Bellini, V. Paolone, Alan D. Lopez, Randy Ruchti, G. Boca, Gianluca Alimonti, Z. Y. Wu, Richard L. Greene, S. Cihangir, M. Vittone, B. G. Cheon, S. Sarwar, S. Shukla, B. O'Reilly, F. Davenport, P. Lebrun, Stephen A. Gourlay, Senta Greene, S. Sala, A. Zallo, S. P. Ratti, Sandra Malvezzi, P. L. Frabetti, Dario Menasce, Daniele Pedrini, G. R. Blackett, C. Dallapiccola, Robert Gardner, John Perry Cumalat, L. Cinquini, P. Inzani, M. S. Nehring, W. D. Shephard, Stefano Bianco, J. M. Bishop, L. Perasso, Fabrizio Fabbri, R. Culbertson, J. A. Swiatek, Cristina Riccardi, M. Pisharody, W. E. Johns, K. Y. Kim, J. S. Kang, Luigi Moroni, James E Wiss, D. L. Puseljic, A. Sala, Harry Cheung, G. N. Kim, Paul Sheldon, D. Torretta, C. Castoldi, Gabriele Gianini, A. E. Kreymer, M. Di Corato, D. J. Harding, J. N. Butler, T. F. Lin, T. Handler, D. R. Claes, J. R. Wilson, Marco Giammarchi, V. Arena, B. Gobbi, C. J. Kennedy, I. Gaines, J. F. Ginkel, P. M. Yager, B. Caccianiga, F. Leveraro, J. F. Filasetta, P. H. Garbincius, Paolo Vitulo, E. Meroni, and G. P. Grim
Subjects: Combinatorics, Physics, Particle physics, High energy, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, CP violation
Abstract: We report the results of a search for [ital CP]-violating decay rate asymmetries ([ital A][sub [ital CP]]) in the charm decay modes [ital D][sup +][r arrow][ital K][sup [minus]][ital K][sup +][pi][sup +], [ital D][sup +][r arrow][ital [bar K]][sup *0][ital K][sup +], [ital D][sup +][r arrow][phi][pi][sup +], and [ital D][sup 0][r arrow][ital K][sup +][ital K][sup [minus]]. Our measurements are all consistent with zero asymmetry: [ital A][sub [ital CP]]([ital KK][pi])=[minus]0.031[plus minus]0.068, [ital A][sub [ital CP]]([ital K][sup *][ital K])=[minus]0.12[plus minus]0.13, [ital A][sub [ital CP]]([phi][pi])=0.066[plus minus]0.086, and [ital A][sub [ital CP]]([ital KK])=0.024[plus minus]0.084. The data were accumulated by the Fermilab high energy photoproduction experiment E687.
Published: 1994

20. Analysis of three D → Kππ Dalitz plots

Author: Daniele Pedrini, V. Arena, P. Inzani, B. Gobbi, G. Bellini, N. M. Cason, D. Claes, I. Gaines, M. Vittone, Z. Y. Wu, P. Lebrum, J. F. Ginkel, B. G. Cheon, Fabrizio Fabbri, D. Torretta, J. N. Butler, C. Castoldi, Paolo Vitulo, K. Y. Kim, M. S. Nehring, John Perry Cumalat, P. H. Garbincius, F. Leveraro, Paul Sheldon, James E Wiss, D. Buchholz, L. Cinquini, C. J. Kennedy, V. S. Paolone, B. O'Reilly, M. Pisharody, Senta Greene, L. Garren, E. Meroni, G. P. Grim, S. Sarwar, Marco Giammarchi, J. S. Kang, B. Caccianiga, L. Perasso, R. Culbertson, Luigi Moroni, Gianluca Alimonti, P. M. Yager, W. D. Shephard, Stefano Bianco, T. Handler, J. M. Bishop, R. Greene, Sandra Malvezzi, P. L. Frabetti, Dario Menasce, Cristina Riccardi, F. Davenport, P. H. Kasper, H. W.K. Cheung, G. N. Kim, A. E. Kreymer, D. L. Puseljic, A. Sala, M. Di Corato, Gianluigi Boca, Alan D. Lopez, C. Dallapiccola, Gabriele Gianini, Robert Gardner, G. R. Blackett, J. A. Swiatek, S. Sala, A. Zallo, D. J. Harding, Stephen A. Gourlay, T. F. Lin, S. Shukla, Randy Ruchti, S. Cihangir, James R. Wilson, Willard Johns, and S. P. Ratti
Subjects: Physics, Nuclear and High Energy Physics, High energy, Particle physics, Dalitz plot, chemistry.chemical_element, Elementary particle, lcsh:QC1-999, Nuclear physics, Particle decay, Amplitude, chemistry, High Energy Physics::Experiment, Fermilab, Beryllium, lcsh:Physics
Abstract: Analysis of three D → Kππ Dalitz plots is presented using data collected by the Fermilab high energy photoproduction experiment E687. Our data are fit to a model consisting of a sum of Breit-Wigner amplitudes for the intermediate two-body resonant decay modes and a constant term for the nonresonant contribution. We extract branching fractions and relative phases and compare them to the results obtained in other experiments. Although this model qualitatively reproduces many features of our data, statistically significant discrepancies are observed in some of our fits.
Published: 1994

21. Measurement of the form factors for the decay D+s → φμ+ν

Author: F. Leveraro, V. S. Paolone, Robert Gardner, M. S. Nehring, Willard Johns, M. Vittone, B. O'Reilly, D. Dallapiccola, John Perry Cumalat, D. Torretta, S. Cihangir, P. Inzani, G. N. Kim, Dario Menasce, A. Zallo, M. Pisharody, N. M. Cason, C. J. Kennedy, A. Sala, B. Caccianiga, B. Gobbi, James R. Wilson, J. A. Swiatek, Z. Y. Wu, V. Arena, F. Davenport, C. Castoldi, Gabriele Gianini, J. M. Bishop, E. Meroni, G. P. Grim, P. M. Yager, Luigi Moroni, G. Boca, S. Shukla, Stephen A. Gourlay, D. J. Harding, Paolo Vitulo, F. L. Fabbri, L. Cinquini, Sandra Malvezzi, Byung Gu Cheon, Paul Sheldon, P. L. Frabetti, G. R. Blackett, Marco Giammarchi, G. Bellini, J. F. Filaseta, L. A. Garren, James E Wiss, G. Alimonti, T. Handler, A. E. Kreymer, Randy Ruchti, P. Lebrun, Senta Greene, S. P. Ratti, M. Di Corato, Alan D. Lopez, D. Buchholz, S. Sala, P. H. Kasper, T. F. Lin, S. Sarwar, W. D. Shephard, Stefano Bianco, Cristina Riccardi, L. Perasso, D. L. Puseljic, J. F. Ginkel, J. N. Butler, I. Gaines, P. H. Garbincius, Daniele Pedrini, D. Claes, J. S. Kang, R. Greene, H. W.K. Cheung, R. Culbertson, and K. Y. Kim
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Elementary particle, Electron, Fermilab, Atomic physics, Polarization (waves)
Abstract: The fermilab high-energy photoproduction experiment E687 provides a sample of approximately 90 events of the decay mode D+s→ φμ+ ν. The ratios of the form factors governing the decay are measured to be Rv=1.8±0.9±0.2 and R2= 1.1±0.8±0.1, implying a polarization of Г 1 /Г t = 1.0±0.5±0.1 for the electron decay, consistent with our measurement of the form factor for the decay D + → K ∗0 μ + ν .
Published: 1994

22. First observation of the Σ− π+ π+ decay mode of the Λc baryon and its branching ratio relative to the Σ+ π+ π− mode

Author: F. L. Fabbri, Sandra Malvezzi, P. L. Frabetti, James R. Wilson, Paul Sheldon, M. Pisharody, F. Leveraro, B. Gobbi, Willard Johns, V. Arena, B. O'Reilly, F. Davenport, S. Sala, C. J. Kennedy, T. F. Lin, D. Buchholz, G. Boca, E. Meroni, G. P. Grim, Dario Menasce, D. L. Puseljic, I. Gaines, J. S. Kang, V. S. Paolone, P. M. Yager, K. Y. Kim, P. H. Garbincius, Stephen A. Gourlay, Gabriele Gianini, G. R. Blackett, T. Handler, N. M. Cason, D. Torretta, John Perry Cumalat, L. A. Garren, James E Wiss, J. M. Bishop, Marco Giammarchi, Senta Greene, J. F. Ginkel, Randy Ruchti, J. N. Butler, W. D. Shephard, Stefano Bianco, S. Cihangir, D. J. Harding, S. P. Ratti, Cristina Riccardi, L. Perasso, C. Dallapicoola, R. Culbertson, Paolo Vitulo, Daniele Pedrini, B. Caccianiga, M. Vittone, P. H. Kasper, R. Greene, Z. Y. Wu, P. Inzani, S. Shukla, A. Zallo, A. Sala, H. W.K. Cheung, D. Claes, L. Cinquini, B. G. Cheon, S. Sarwar, Alan D. Lopez, G. Alimonti, A. E. Kreymer, P. Lebrun, M. Di Corato, C. Castoldi, L. Viola, G. N. Kim, Luigi Moroni, Robert Gardner, J. A. Swiatek, M. S. Nehring, and G. Bellini
Subjects: Physics, Baryon, Nuclear physics, Nuclear and High Energy Physics, Particle decay, Mass distribution, Branching fraction, Elementary particle, Charge (physics), Atomic physics, Sigma baryon, Conjugate
Abstract: We report the first observation (103±17 events) of the decay Λ+c → Σ−π+π+ and the charge conjugate. A measurement of the relative branching ratio Г (Λ + c → Σ − π + π + )/Г (Λ + c → Σ + π + π + π − = 0.53±0.15 (stat) ± 0.07 (sys) is also presented.
Published: 1994

23. Precise measurements of the D0 and D+ meson lifetimes

Author: J. S. Kang, D. L. Puseljic, A. Sala, S. Shukla, Robert Gardner, P. H. Garbincius, J. N. Butler, Senta Greene, J. A. Swiatek, S. Sala, M. Pisharody, Stephen A. Gourlay, C. Dallapiccola, B. Gobbi, G. Bellini, T. F. Lin, Daniele Pedrini, N. M. Cason, G. Boca, B. O'Reilly, Luigi Moroni, Paolo Vitulo, S. Cihangir, Z. Y. Wu, K. Y. Kim, P. Inzani, D. Claes, S. Sarwar, J. R. Wilson, I. Gaines, A. E. Kreymer, P. Lebrun, B. G. Cheon, Gabriele Gianini, Gianluca Alimonti, W. D. Shephard, Stefano Bianco, F. Davenport, S. P. Ratti, D. J. Harding, Paul Sheldon, Alan D. Lopez, Cristina Riccardi, J. F. Ginkel, Marco Giammarchi, L. Garren, E. Meroni, G. P. Grim, J. F. Filaseta, M. Di Corato, D. Buchholz, C. J. Kennedy, Randy Ruchti, D. Torretta, P. H. Kasper, T. Handler, M. Vittone, John Perry Cumalat, R. Greene, Fabrizio Fabbri, G. N. Kim, A. Zallo, L. Cinquini, P. M. Yager, Willard Johns, H. W.K. Cheung, V. S. Paolone, C. Castoldi, Sandra Malvezzi, J. M. Bishop, B. Caccianiga, P. L. Frabetti, L. Perasso, R. Culbertson, Dario Menasce, G. R. Blackett, V. Arena, M. S. Nehring, James E Wiss, and F. Leveraro
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Meson, Life span, D meson, Elementary particle, Fermilab
Abstract: We report precise measurements of the D 0 and D + meson lifetimes by the E687 Collaboration at Fermilab. The measurements have been made using 16000 fully reconstructed decays of the D 0 into the K − π + and K − π + π − π + final states and 9000 decays of the D + into the K − π + π + final state. The lifetimes of the D 0 and D + mesons are measured to be 0.413±0.004±0.003 ps and 1.048±0.015±01011 ps respectively.
Published: 1994

24. Inelasticρ0photoproduction in the reactionγp→ρ0π+n

Author: W. M. Bugg, T. Handler, K.A. Danyo, G. T. Condo, M. Pisharody, and G.R. Blackett
Subjects: Physics, Crystallography, Angular distribution, Meson production, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Pi, Mass spectrum, Production (computer science), Inelastic scattering, Helicity
Abstract: Inelastic {rho}{sup 0} photoproduction in the reaction {gamma}{ital p}{r_arrow}{rho}{sup 0}{pi}{sup +}{ital n} is observed in the peripheral region {vert_bar}{ital t}{sub {gamma},{rho}}{sup 0{prime}}{vert_bar}{lt}0.12 GeV{sup 2}. The data are consistent with the {rho}{sup 0} production being due to a double peripheral mechanism which conserves {ital s}-channel helicity. The {pi}{sup +}{ital n} produced in association with the {rho}{sup 0} is also consistent with the same mechanism, although there is a distortion of the expected angular distributions in the {pi}{sup +}{ital n} mass region of 1.3--1.5 GeV/{ital c}{sup 2}.
Published: 1994

25. Observation of an excited state of theΛc+baryon

Author: G. Alimonti, A. E. Kreymer, P. Lebrun, N. M. Cason, L. Garren, E. Meroni, G. P. Grim, T. F. Lin, M. Di Corato, P. H. Garbincius, D. L. Puseljic, C. Dallapiccola, M. Pisharody, Alan D. Lopez, S. Sala, G. N. Kim, R. Culbertson, C. J. Kennedy, Marco Giammarchi, Paul Sheldon, T. Handler, B. O'Reilly, Gabriele Gianini, C. Castoldi, Daniele Pedrini, I. Gaines, Robert Gardner, P. M. Yager, M. Vittone, J. F. Ginkel, Paolo Vitulo, S. Sarwar, D. Buchholz, K. Y. Kim, V. S. Paolone, J. A. Swiatek, J. N. Butler, M. S. Nehring, J. F. Filasetta, D. Claes, R. Greene, W. D. Shephard, Stefano Bianco, D. Torretta, P. Inzani, Cristina Riccardi, G. R. Blackett, L. Perasso, A. Zallo, B. G. Cheon, P. H. Kasper, Luigi Moroni, Sandra Malvezzi, J. S. Kang, P. L. Frabetti, D. J. Harding, John Perry Cumalat, James E Wiss, J. M. Bishop, V. Arena, Dario Menasce, S. Shukla, H. W.K. Cheung, L. Cinquini, S. Cihangir, S. P. Ratti, James R. Wilson, A. Sala, F. Leveraro, F. Davenport, Willard Johns, Randy Ruchti, Senta Greene, G. Boca, Stephen A. Gourlay, Fabrizio Fabbri, B. Caccianiga, B. Gobbi, G. Bellini, and Z. Y. Wu
Subjects: Baryon, Charmed baryons, Physics, Statistics::Theory, Crystallography, Statistics::Applications, Branching fraction, Excited state, General Physics and Astronomy, Atomic physics, Lambda
Abstract: An observation of an excited ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+\mathrm{*}}$ baryon decaying to ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$, with ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathit{pK}}^{\mathrm{\ensuremath{-}}}$${\mathrm{\ensuremath{\pi}}}^{+}$, is presented. We reconstruct 39.7\ifmmode\pm\else\textpm\fi{}8.7${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+\mathrm{*}}$ baryons with a mass of 340.4\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.3 MeV/${\mathit{c}}^{2}$ above the ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$ mass. The upper limit on the resonant branching ratio is B(${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+\mathrm{*}}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\Sigma}}}_{\mathit{c}}$${\mathrm{\ensuremath{\pi}}}^{\ifmmode\pm\else\textpm\fi{}}$)/B(${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+\mathrm{*}}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$ ${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$)36% at the 90% confidence level.
Published: 1994

26. A measurement of the Cabibbo-suppressed decays D0 → π−π+ and D0 → K−K+

Author: C. Dallapiccola, Willard Johns, Robert Gardner, J. F. Filaseta, G. N. Kim, M. Pisharody, T. Handler, G. Boca, Randy Ruchti, James E Wiss, F. Leveraro, Daniele Pedrini, James R. Wilson, S. Cihangir, B. Gobbi, G. Bellini, J. A. Swiatek, P. Inzani, V. Arena, D. Claes, Gabriele Gianini, Sandra Malvezzi, Alan D. Lopez, I. Gaines, W. D. Shephard, Stefano Bianco, M. S. Nehring, T. F. Lin, C. Castoldi, Z. Y. Wu, P. L. Frabetti, Senta Greene, Cristina Riccardi, A. E. Kreymer, S. Shukla, P. Lebrun, Dario Menasce, P. H. Garbincius, J. S. Kang, B. G. Cheon, M. Di Corato, D. Buchholz, C. J. Kennedy, John Perry Cumalat, K. Y. Kim, M. Vittone, S. P. Ratti, P. M. Yager, D. L. Puseljic, A. Sala, P. H. Kasper, L. Cinquini, S. Sala, A. Zallo, R. Greene, L. Garren, J. F. Ginkel, E. Meroni, G. P. Grim, Gianluca Alimonti, Fabrizio Fabbri, Luigi Moroni, D. J. Harding, J. M. Bishop, B. O'Reilly, H. W.K. Cheung, Stephen A. Gourlay, J. N. Butler, L. Perasso, R. Culbertson, Marco Giammarchi, G. R. Blackett, S. Sarwar, V. S. Paolone, Paul Sheldon, B. Caccianiga, Paolo Vitulo, N. M. Cason, D. Torretta, and F. Davenport
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Branching fraction, Fermilab, Branching (polymer chemistry)
Abstract: We report a measurement of the relative branching ratio of two Cabibbo-suppressed decay modes: D 0 → π − π + and D 0 → K − K + . The data were accumulated in the 1990–1991 fixed target run of Fermilab high energy photoproduction experiment E687. The branching ratios of these modes relative to the Cabibbo-allowed decay D 0 → K − π + are also presented. The relative branching ratios are measured to be Γ ( D 0 → KK )/ Γ ( D 0 → ππ ) = 2.53 ± 0.46 ± 0.19, Γ ( D 0 → KK )/ Γ ( D 0 → Kπ ) = 0.109 ± 0.007 ± 0.009, and Γ ( D 0 → ππ )/ Γ ( D 0 → Kπ ) = 0.043 ± 0.007 ± 0.003.
Published: 1994

27. Evidence of the Cabibbo-suppressed decay Λc+ → pK−K+

Author: C. Dallapiccola, T. F. Lin, J. S. Kang, N. M. Cason, John Perry Cumalat, James E Wiss, Daniele Pedrini, M. Vittone, D. Claes, Luigi Moroni, F. Davenport, F. Leveraro, Willard Johns, R. Culbertson, Senta Greene, J. M. Bishop, S. Sarwar, S. Cihangir, I. Gaines, C. J. Kennedy, E. Meroni, G. P. Grim, D. L. Puseljic, J. F. Ginkel, James R. Wilson, G. R. Blackett, K. Y. Kim, B. Caccianiga, B. Gobbi, P. M. Yager, J. N. Butler, G. Boca, Z. Y. Wu, Stephen A. Gourlay, P. H. Garbincius, Sandra Malvezzi, R. Greene, P. L. Frabetti, Paul Sheldon, F. L. Fabbri, P. Inzani, H. W.K. Cheung, W. D. Shephard, Stefano Bianco, J. F. Filaseta, L. A. Garren, B. G. Cheon, A. Zallo, D. Buchholz, Cristina Riccardi, Randy Ruchti, M. Pisharody, L. Perasso, S. P. Ratti, C. Castoldi, Robert Gardner, S. Sala, S. Shukla, A. Sala, L. Cinquini, P. H. Kasper, Marco Giammarchi, G. Bellini, Gabriele Gianini, D. J. Harding, Alan D. Lopez, J. A. Swiatek, G. N. Kim, G. Alimonti, A. E. Kreymer, P. Lebrun, M. S. Nehring, M. Di Corato, Paolo Vitulo, V. S. Paolone, D. Torretta, Dario Menasce, V. Arena, B. O'Reilly, and T. Handler
Subjects: Baryon, Physics, Nuclear physics, Hadronic decay, Nuclear and High Energy Physics, High energy, Proton, Branching fraction, Analytical chemistry, Elementary particle, Lambda baryon
Abstract: We report evidence for the Cabibbo-suppressed decay of the charm baryon Λ c + into the final state pK − K + . The analysis is performed on data collected by high energy photoproduction experiment E687 during the 1990–1991 Fermilab fixed target run. The branching ratio of the decay Λ c + → pK − K + relative to the non-suppressed Λ c + → pK − π + is measured to be BR( pK − K + / pK − π + ) = 0.096 ± 0.029 ± 0.010. The upper limit of the decay into po relative to the inclusive pK − K + decay is measured to be BR( po / pK − K +
Published: 1993

28. Precise measurement of theDs±meson lifetime

Author: C. J. Kennedy, P. M. Yager, M. Pisharody, Richard L. Greene, M. Vittone, A. Zallo, S. Sala, Gabriele Gianini, Robert Gardner, D. J. Harding, D. Buchholz, John Perry Cumalat, S. P. Ratti, Stephen A. Gourlay, J. A. Swiatek, D. R. Claes, Fabrizio Fabbri, L. Cinquini, C. Dallapiccola, W. D. Shephard, Stefano Bianco, Cristina Riccardi, Luigi Moroni, A. E. Kreymer, P. Lebrun, D. L. Puseljic, A. Sala, Harry Cheung, P. H. Kasper, N. M. Cason, W. E. Johns, J. M. Bishop, B. Caccianiga, B. G. Cheon, M. Di Corato, Sandra Malvezzi, P. L. Frabetti, E. Meroni, G. P. Grim, Dario Menasce, Z. Y. Wu, C. Castoldi, Paolo Vitulo, D. Torretta, J. S. Kang, G. Bellini, S. Sarwar, T. Handler, L. Perasso, R. Culbertson, G. R. Blackett, I. Gaines, Daniele Pedrini, P. Inzani, Gianluigi Boca, Senta Greene, J. F. Ginkel, J. F. Filasetta, P. H. Garbincius, K. Y. Kim, G. N. Kim, B. Gobbi, Paul Sheldon, V. Paolone, J. R. Wilson, Alan D. Lopez, M. S. Nehring, Marco Giammarchi, J. N. Butler, James E Wiss, F. Leveraro, T. F. Lin, F. Davenport, L. A. Garren, Randy Ruchti, V. Arena, Gianluca Alimonti, S. Cihangir, B. O'Reilly, S. Shukla, and R. Diaferia
Subjects: Physics, Particle decay, High energy, Particle physics, Meson, Life span, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Bremsstrahlung, General Physics and Astronomy, Photon beams
Abstract: A precise measurement of the [ital D][sub [ital s]][sup [plus minus]] meson lifetime is reported. The data were accumulated by the high energy photoproduction experiment E687 at Fermilab in the 1990--1991 fixed target run. The measurement has been done using 900 fully reconstructed [ital D][sub [ital s]][sup [plus minus]][r arrow][phi][pi][sup [plus minus]] decays. The lifetime of the [ital D][sub [ital s]][sup [plus minus]] meson is measured to be 0.475[plus minus]0.020[plus minus]0.007 ps.
Published: 1993

29. A measurement of Γ (DS+ → φμ+ν) /Γ (DS+ → φπ+)

Author: J. S. Kang, D. L. Puseljic, A. Sala, S. Shukla, Robert Gardner, P. H. Garbincius, Senta Greene, J. A. Swiatek, S. Sala, M. Pisharody, Stephen A. Gourlay, C. Dallapiccola, B. Gobbi, G. Bellini, T. F. Lin, Gianluigi Boca, Daniele Pedrini, N. M. Cason, B. O'Reilly, Luigi Moroni, Paolo Vitulo, S. Cihangir, Z. Y. Wu, K. Y. Kim, P. Inzani, D. Claes, I. Gaines, A. E. Kreymer, P. Lebrun, B. G. Cheon, Gabriele Gianini, W. D. Shephard, Stefano Bianco, F. Davenport, S. P. Ratti, D. J. Harding, Paul Sheldon, Alan D. Lopez, Cristina Riccardi, J. F. Ginkel, Marco Giammarchi, J. N. Butler, L. Garren, E. Meroni, G. P. Grim, Gianluca Alimonti, M. Vittone, J. F. Filaseta, M. Di Corato, D. Buchholz, C. J. Kennedy, Randy Ruchti, D. Torretta, P. H. Kasper, T. Handler, John Perry Cumalat, R. Greene, Fabrizio Fabbri, G. N. Kim, A. Zallo, L. Cinquini, P. M. Yager, Willard Johns, H. W.K. Cheung, S. Sarwar, V. S. Paolone, C. Castoldi, Sandra Malvezzi, J. M. Bishop, James R. Wilson, B. Caccianiga, P. L. Frabetti, L. Perasso, R. Culbertson, Dario Menasce, G. R. Blackett, V. Arena, M. S. Nehring, James E Wiss, and F. Leveraro
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Branching fraction, Fermilab, lcsh:Physics, lcsh:QC1-999
Abstract: Fermilab high-energy photoproduction experiment E687 measures a branching ratio of Γ ( D S + → φμ + ν ) / Γ ( D S + → φμ + ) = 0.58 ± 0.17 (stat) ± 0.07 (sys). This branching ratio is combined with theoretical inputs to obtain a new measurement of the D S + absolute branching ratio of Γ ( D S + → φμ + ) / Γ ( D S + → all) = 0.031 ± 0.009 (stat 0.005 (sys) ± 0.004 (theoretical).
Published: 1993

30. 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

31. Analysis of the decay mode

Author: P.L. Frabetti, G.P. Grim, V.S. Paolone, P.M. Yager, C.W. Bogart, H.W.K. Cheung, S. Culy, J.P. Cumalat, C. Dallapicola, J.F. Ginkel, S.V. Greene, W.E. Johns, M.S. Nehring, J.N. Butler, S. Cihangir, I. Gaines, P.H. Garbincius, L. Garren, S. Gourlay, D.J. Harding, P. Kasper, A. Kreymer, P. Lebrun, H. Mendez, S. Shukla, S. Bianco, F.L. Fabbri, S. Sarwar, A. Spallone, A. Zallo, R. Culbertson, R.W. Gardner, R. Greene, G. Jaross, K. Lingel, J. Wiss, B.G. Cheon, J.S. Kang, K.Y. Kim, G. Alimonti, G. Bellini, B. Caccianiga, L. Cinquini, M. Di Corato, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Moroni, D. Pedrini, L. Perasso, S. Sala, D. Torretta, M. Vittone, F. Davenport, J.F. Filasetta, D. Buchholz, D. Claes, B. Gobbi, B. O'Reilly, S. Park, R. Yoshida, J.M. Bishop, J.K. Busenitz, N.M. Cason, J.D. Cunningham, C.J. Kenney, G.N. Kim, T.F. Lin, E.J. Mannel, R.J. Mountain, D.L. Puseljic, R.C. Ruchti, W.D. Shephard, J.A. Swiatek, Z.Y. Wu, M.E. Zanabria, V. Arena, G. Boca, C. Castoldi, R. Diaferia, G. Gianini, S.P. Ratti, C. Riccardi, P. Vitulo, A. Lopez, J.R. Wilson, G.R. Blackett, M. Pisharody, T. Handler, and P.D. Sheldon
Subjects: Semileptonic decay, Physics, Nuclear physics, Nuclear and High Energy Physics, chemistry, Branching fraction, Mass spectrum, Mode (statistics), Form factor (quantum field theory), chemistry.chemical_element, Beryllium, Neutrino
Published: 1993

32. Measurement of the lifetime of theΞc0

Author: Alan D. Lopez, S. Sarwar, Sandra Malvezzi, S. Sala, P. L. Frabetti, N. M. Cason, G. Alimonti, A. E. Kreymer, P. Lebrun, I. Gaines, Randy Ruchti, Z. Y. Wu, Robert Gardner, W. D. Shepard, D. L. Puseljic, V. S. Paolone, B. O'Reilly, B. G. Cheon, M. Vittone, J. S. Kang, S. Shukla, M. Di Corato, Senta Greene, J. F. Ginkel, C. J. Kennedy, J. A. Swiatek, James E Wiss, L. Cinquini, D. Buchholz, John Perry Cumalat, J. N. Butler, J. F. Filasetta, R. Diaferia, Luigi Moroni, T. F. Lin, S. Cihangir, P. H. Garbincius, Stefano Bianco, P. Inzani, A. Zallo, P. M. Yager, Daniele Pedrini, Paolo Vitulo, D. Torreta, S. P. Ratti, B. Gobbi, G. N. Kim, G. Bellini, J. M. Bishop, P. H. Kasper, Dario Menasce, Cristina Riccardi, M. Pisharody, R. Greene, D. Claes, L. Perasso, C. Castoldi, V. Arena, H. W.K. Cheung, G. R. Blackett, Gianluigi Boca, Marco Giammarchi, L. Garren, E. Meroni, G. P. Grim, Fabrizio Fabbri, B. Caccianiga, Gabriele Gianini, A. Sala, M. S. Nehring, D. J. Harding, F. Davenport, Stephen A. Gourlay, C. Dallapiccola, K. Y. Kim, T. Handler, R. Culbertson, Paul Sheldon, F. Leveraro, Willard Johns, and James R. Wilson
Subjects: Physics, High energy, Particle physics, Meson, Hyperon, Analytical chemistry, General Physics and Astronomy, Lambda baryon, Calculation methods, Xi baryon
Abstract: A measurement of the lifetime of the charmed strange baryon [Xi][sub [ital c]][sup 0] is presented. The data were accumulated by the Fermilab high energy photoproduction experiment E687. The measurement has been made using 42[plus minus]10 [Xi][sub [ital c]][sup 0][r arrow][Xi][sup [minus]][pi][sup +] decays. The lifetime of the [Xi][sub [ital c]][sup 0] is measured to be 0.101[sub [minus]0.017][sup +0.025][plus minus]0.005 ps and its mass is measured to be 2462.1[plus minus]3.1[plus minus]1.4 MeV/[ital c][sup 2].
Published: 1993

33. Measurement of theΛc+lifetime

Author: P. L. Frabetti, H. W. K. Cheung, J. P. Cumalat, C. Dallapiccola, J. F. Ginkel, S. V. Greene, W. E. Johns, M. S. Nehring, J. N. Butler, S. Cihangir, I. Gaines, L. Garren, P. H. Garbincius, S. A. Gourlay, D. J. Harding, P. Kasper, A. Kreymer, P. Lebrun, S. Shukla, S. Bianco, F. L. Fabbri, S. Sarwar, A. Zallo, R. Culbertson, R. W. Gardner, R. Greene, J. Wiss, G. Alimonti, G. Bellini, B. Caccianiga, L. Cinquini, M. Di Corato, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Moroni, D. Pedrini, L. Perasso, A. Sala, S. Sala, D. Toretta, M. Vittone, D. Buchholz, D. Claes, B. Gobbi, B. O’Reilly, J. M. Bishop, N. M. Cason, C. J. Kennedy, G. N. Kim, T. F. Lin, E. J. Mannel, D. L. Puseljic, R. C. Ruchti, W. D. Shephard, J. A. Swiatek, Z. Y. Wu, V. Arena, G. Boca, C. Castoldi, R. Diaferia, G. Gianini, S. P. Ratti, C. Riccardi, P. Vitulo, A. Lopez, G. P. Grim, V. S. Paolone, P. M. Yager, J. R. Wilson, P. D. Sheldon, F. Davenport, J. F. Filasetta, G. R. Blackett, M. Pisharody, T. Handler, B. G. Cheon, J. S. Kang, and K. Y. Kim
Subjects: Charmed baryons, Physics, Nuclear physics, Particle decay, High energy, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Analytical chemistry, General Physics and Astronomy, Charge (physics), Lambda, Calculation methods
Abstract: A precise measurement of the [Lambda][sub [ital c]][sup +] lifetime using approximately 1340 fully reconstructed [Lambda][sub [ital c]][sup +][r arrow][ital pK][sup [minus]][pi][sup +] and charge conjugate decays is presented. The data were accumulated by the Fermilab high energy photoproduction experiment E687. The lifetime of the [Lambda][sub [ital c]][sup +] is measured to be 0.215[plus minus]0.016[plus minus]0.008 ps.
Published: 1993

34. First evidence of

Author: J. F. Ginkel, B. G. Cheon, S. Sarwar, Sandra Malvezzi, J. F. Filasetta, Daniele Pedrini, C. J. Kennedy, P. M. Yager, P. L. Frabetti, A. Sala, Dario Menasce, G. R. Blackett, D. Torretta, P. Inzani, Sergio P Ratti, C. Dallapiccola, D. Buchholz, I. Gaines, John Perry Cumalat, M. Pisharody, N. M. Cason, L. Cinquini, W. D. Shephard, Stefano Bianco, P. H. Garbincius, E. Meroni, James R. Wilson, James E Wiss, F. Davenport, Cristina Riccardi, G. P. Grim, Gianluca Alimonti, Stephen A. Gourlay, W. E. Johns, J. M. Bishop, J. S. Kang, Nehring, D. L. Puseljic, B. O'Reilly, K. Y. Kim, P. H. Kasper, V. Arena, Marco Giammarchi, Harry Cheung, D. J. Harding, F. Leveraro, Senta Greene, V. Paolone, R. Diaferia, B. Gobbi, Giulia Giannini, Paolo Vitulo, Joel N. Butler, Paul Sheldon, M. Vittone, Alan D. Lopez, Daniel R Claes, G. Boca, Rodney L. Greene, A. Zallo, B. Caccianiga, T. Handler, L. Perasso, R. Culbertson, S. Shukla, S. Cihangir, S. Sala, T. F. Lin, L. A. Garren, Fabrizio Fabbri, Z. Y. Wu, Randy Ruchti, G. Bellini, C. Castoldi, G. N. Kim, A. E. Kreymer, P. Lebrun, M. Di Corato, Robert Gardner, J. A. Swiatek, and Luigi Moroni
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, chemistry, Pi, Mass spectrum, chemistry.chemical_element, Beryllium, Omega
Published: 1993

35. Radiation and solvent effects on wavelength shifting fibers used with liquid scintillators

Author: M. Lowry, P. Armatis, B.H. Singletary, F. Plasil, R. Piercey, D. Onoprienko, Tariq Aziz, M.J. Rennich, R. Raghavan, S.C. Tonwar, C. Wuest, K. Shankar, V. Shoutko, L. Bolen, O. Clamp, K. Skulina, K. Sudhakar, L. Cremaldi, G. Graham, A. Rozjkov, R.A. Todd, R.A. Lillie, B. Quinn, A.Y. Savin, L. Croft, S.N. Ganfuli, Y. Efremenko, E. Tarkovsky, B. Moore, K.F. Read, S.C. Berridge, D. Masquelier, A. Malinin, H. Britt, E. Shoumilov, A.V. Smirnov, Yu. Gorodkov, S. Banerjee, V. Markizov, Kajari Mazumdar, S. Harper, T. Handler, A. Nikitin, C. Cochran, T.A. Gabriel, A. Arefiev, J. Zhou, J. reidy, R. Bionta, H.O. Cohn, A.M. Gordeev, S.R. Chendvankar, W.M. Bugg, O. Baranov, E. Ables, M.L. Bauer, B.L. Bishop, K. Shmakov, K.G. Young, Y.A. Kamyshkov, P.K. Malhotra, and M. Pisharody
Subjects: Radiation, Materials science, Annealing (metallurgy), business.industry, Detector, Scintillator, Wavelength, chemistry.chemical_compound, Optics, chemistry, Pseudorapidity, Polystyrene, Irradiation, business
Abstract: The chemical compatibility of wave length shifting fibers with several liquid scintillators has been investigated. Based on systematic characterization of the behavior of the BC-517 family, a time of life of 70–450 years was estimated for the polystyrene based wave length shifting fiber in BC-517P scintillator. Wavelength shifting (WLS) fibers irradiated continuously to a dose of 6.4 Mrads (at .377 Mrad/hr of 60 Co) were observed to decrease from 100% to 5% transmission; however, after 100 hours of annealing, the transmission increased to 90%. GEANT3 simulations of a simplified calorimeter located behind a BaF 2 electromagnetic calorimeter for the GEM detector at SSC showed that the constant term in the energy resolution will change from 1.8 to 2.9 in five years at 10 34 luminosity for pseudorapidity η=3.
Published: 1993

36. 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

37. 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

38. Two-bodyDs+decays toηπ+,η′π+,ηρ+,η′ρ+, andφρ+

Author: M. Daoudi, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, J. G. Smith, J. Alexander, C. Bebek, K. Berkelman, D. Besson, T. E. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, P. S. Drell, R. Ehrlich, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, K. Honscheid, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, J. D. Lewis, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, S. Nandi, C. R. Ng, E. Nordberg, C. O'Grady, J. R. Patterson, D. Peterson, M. Pisharody, D. Riley, M. Sapper, M. Selen, H. Worden, M. Worris, P. Avery, A. Freyberger, J. Rodriguez, J. Yelton, S. Henderson, K. Kinoshita, F. Pipkin, M. Saulnier, R. Wilson, J. Wolinski, D. Xiao, H. Yamamoto, A. J. Sadoff, R. Ammar, P. Baringer, D. Coppage, R. Davis, M. Kelly, N. Kwak, H. Lam, S. Ro, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, S. Schrenk, M. S. Alam, I. J. Kim, B. Nemati, V. Romero, C. R. Sun, P. -N. Wang, M. M. Zoeller, G. Crawford, R. Fulton, K. K. Gan, T. Jensen, H. Kagan, R. Kass, R. Malchow, F. Morrow, J. Whitmore, P. Wilson, F. Butler, X. Fu, G. Kalbfleisch, M. Lambrecht, P. Skubic, J. Snow, P. -L. Wang, D. Bortoletto, D. N. Brown, J. Dominick, R. L. McIlwain, D. H. Miller, M. Modesitt, E. I. Shibata, S. F. Schaffner, I. P. J. Shipsey, M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E. H. Thorndike, C. -H. Wang, M. Artuso, M. Goldberg, T. Haupt, N. Horwitz, R. Kennett, M. D. Mestayer, G. C. Moneti, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. Thusalidas, W. -M. Yao, G. Zhu, A. V. Barnes, J. Bartelt, S. E. Csorna, V. Jain, T. Letson, D. S. Akerib, B. Barish, D. F. Cowen, G. Eigen, R. Stroynowski, J. Urheim, A. J. Weinstein, R. J. Morrison, H. Tajima, D. Schmidt, and M. Procario
Subjects: Physics, Particle decay, Crystallography, Pion, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, Elementary particle, Calculation methods
Abstract: We have made measurements of several {ital D}{sub {ital s}} branching ratios, relative to the {phi}{pi}{sup +} mode. We have observed two previously unseen two-body hadronic decays of the {ital D}{sub {ital s}}{sup +}, namely {eta}{rho}{sup +} and {eta}{prime}{rho}{sup +}, and measured relative branching ratios of 2.86{plus minus}0.38{sub {minus}0.38}{sup +0.36} and 3.44{plus minus}0.62{sub {minus}0.46}{sup +0.44}, respectively. We have determined the relative branching ratio for the decay into {phi}{rho}{sup +} to be 1.86{plus minus}0.26{sub {minus}0.40}{sup +0.29}. In addition, we have measured relative branching ratios for the {eta}{pi}{sup +} and {eta}{prime}{pi}{sup +} states, for which there had previously been conflicting measurements; our results are 0.54{plus minus}0.09{plus minus}0.06 and 1.20{plus minus}0.15{plus minus}0.11, respectively. Combining these new measurements with previous results and using (3.7{plus minus}1.2)% for the value of {ital scrB}({ital D}{sub {ital s}}{r arrow}{phi}{pi}{sup +}), we can account for {approx}(79{plus minus}26)% of all {ital D}{sub {ital s}}{sup +} decays. In addition we have also measured relative branching ratios or set upper limits on {ital D}{sup +} decays to all of the above-mentioned final states.
Published: 1992

39. Ds+decays to ηπ+and η’π+

Author: J. Alexander, C. Bebek, K. Berkelman, D. Besson, T. E. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, P. S. Drell, R. Ehrlich, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, K. Honscheid, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, J. D. Lewis, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, S. Nandi, C. R. Ng, E. Nordberg, C. O’Grady, J. R. Patterson, D. Peterson, M. Pisharody, D. Riley, M. Sapper, M. Selen, H. Worden, M. Worris, P. Avery, A. Freyberger, J. Rodriguez, J. Yelton, S. Henderson, K. Kinoshita, F. Pipkin, M. Saulnier, R. Wilson, J. Wolinski, D. Xiao, H. Yamamoto, A. J. Sadoff, R. Ammar, P. Baringer, D. Coppage, R. Davis, M. Kelly, N. Kwak, H. Lam, S. Ro, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, S. Schrenk, M. S. Alam, I. J. Kim, B. Nemati, V. Romero, C. R. Sun, P.-N. Wang, M. M. Zoeller, G. Crawford, R. Fulton, K. K. Gan, T. Jensen, H. Kagan, R. Kass, R. Malchow, F. Morrow, J. Whitmore, P. Wilson, F. Butler, X. Fu, G. Kalbfleisch, M. Lambrecht, P. Skubic, J. Snow, P.-L. Wang, D. Bortoletto, D. N. Brown, J. Dominick, R. L. McIlwain, D. H. Miller, M. Modesitt, E. I. Shibata, S. F. Schaffner, I. P. J. Shipsey, M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E. H. Thorndike, C.-H. Wang, M. Artuso, M. Goldberg, T. Haupt, N. Horwitz, R. Kennett, G. C. Moneti, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. Thusalidas, W.-M. Yao, G. Zhu, A. V. Barnes, J. Bartelt, S. E. Csorna, V. Jain, T. Letson, M. D. Mestayer, D. S. Akerib, B. Barish, D. F. Cowen, G. Eigen, R. Stroynowski, J. Urheim, A. J. Weinstein, R. J. Morrison, H. Tajima, D. Schmidt, M. Procario, M. Daoudi, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, and J. G. Smith
Subjects: Combinatorics, Physics, Particle decay, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Quarkonium, Gamma detection
Abstract: Using the CLEO II detector, we have accurately measured ${\mathit{D}}_{\mathit{s}}$ decay branching ratios relative to the \ensuremath{\varphi}${\mathrm{\ensuremath{\pi}}}^{+}$ mode for the \ensuremath{\eta}${\mathrm{\ensuremath{\pi}}}^{+}$ and \ensuremath{\eta}'${\mathrm{\ensuremath{\pi}}}^{+}$ states, for which there are conflicting claims; our results are 0.54\ifmmode\pm\else\textpm\fi{}0.09\ifmmode\pm\else\textpm\fi{}0.06 and 1.20\ifmmode\pm\else\textpm\fi{}0.15\ifmmode\pm\else\textpm\fi{}0.11, respectively.
Published: 1992

40. 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

41. Unusual decay modes ofD0andD+mesons

Author: R. Ammar, P. Baringer, D. Coppage, R. Davis, P. Haas, M. Kelly, N. Kwak, H. Lam, S. Ro, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, S. Schrenk, G. Crawford, R. Fulton, T. Jensen, D. Johnson, H. Kagan, R. Kass, R. Malchow, F. Marrow, J. Whitmore, P. Wilson, D. Bortoletto, D. N. Brown, J. Dominick, R. L. McIlwain, D. H. Miller, M. Modesitt, C. R. Ng, S. F. Schaffner, E. I. Shibata, I. P. J. Shipsey, M. Battle, H. Kroha, K. Sparks, E. H. Thorndike, C. -H. Wang, M. S. Alam, I. J. Kim, W. C. Li, B. Nemati, V. Romero, C. R. Sun, P. -N. Wang, M. M. Zoeller, M. Goldberg, T. Haupt, N. Horwitz, V. Jain, R. Kennett, M. D. Mestayer, G. C. Moneti, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. Thusalidas, W. -M. Yao, G. Zhu, A. V. Barnes, J. Bartelt, S. E. Csorna, T. Letson, J. Alexander, M. Artuso, C. Bebek, K. Berkelman, D. Besson, T. E. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, P. S. Drell, R. Ehrlich, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, K. Honscheid, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, J. D. Lewis, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, S. Nandi, E. Nordberg, C. O'Grady, J. R. Patterson, D. Peterson, M. Pisharody, D. Riley, M. Sapper, M. Selen, A. Silverman, H. Worden, M. Worris, A. J. Sadoff, P. Avery, A. Freyberger, J. Rodriguez, J. Yelton, S. Henderson, K. Kinoshita, F. Pipkin, M. Procario, M. Saulnier, R. Wilson, J. Wolinski, and D. Xiao
Subjects: Physics, Particle decay, Crystallography, Condensed matter physics, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Cornell Electron Storage Ring
Abstract: CLEO has measured decay modes of the {ital D}{sup 0} and {ital D}{sup +} into final states consisting of {ital K}{sup {plus minus}}'s, {pi}{sup {plus minus}}'s, {ital K}{sup 0}'s and {ital {bar K}}{sup 0}'s, using data taken with the CLEO detector at the Cornell Electron Storage Ring. We report new results on the decays of {ital D}{sup 0}'s into 4{pi}{sup {plus minus}},{ital K}{sup {minus}}{ital K+}{pi}{sup {minus}}{pi}{sup +},{ital {bar K}}{sup 0}{ital K+}{ital K{minus}},{ital {bar K}}{sup 0} {ital K+}{pi}{sup {minus}},{ital K}{sup 0}{ital K{minus}}{pi}{sup +},3{ital K}{sub {ital S}}{sup 0} and {ital {bar K}}{sup 0}{phi} together with some of their resonant substructure. We also present the first observation of the decay {ital D}{sup +}{r arrow}{ital {bar K}}{sup 0}{ital {bar K}0}{ital K+} and give limits on the doubly-Cabibbo-suppressed decays of the {ital D}{sup 0} into {ital K}{sup +}{pi}{sup {minus}} and {ital K}{sup +}{pi}{sup {minus}}{pi}{sup +}{pi}{sup {minus}}.
Published: 1991

42. Measurement of the ratioB(D0→K*−e+νe)B(D0→K−e+νe)

Author: G. Crawford, R. Fulton, K. K. Gan, T. Jensen, D. R. Johnson, H. Kagan, R. Kass, R. Malchow, F. Morrow, J. Whitmore, P. Wilson, D. Bortoletto, D. Brown, J. Dominick, R. L. McIlwain, D. H. Miller, M. Modesitt, C. R. Ng, S. F. Schaffner, E. I. Shibata, I. P. J. Shipsey, M. Battle, P. Kim, H. Kroha, K. Sparks, E. H. Thorndike, C. -H. Wang, M. S. Alam, I. J. Kim, B. Nemati, V. Romero, C. R. Sun, P. -N. Wang, M. M. Zoeller, M. Goldberg, T. Haupt, N. Horwitz, V. Jain, Rosemary Kennett, M. D. Mestayer, G. C. Moneti, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. Thusalidas, W. -M. Yao, G. Zhu, A. V. Barnes, J. Bartelt, S. E. Csorna, T. Letson, J. Alexander, M. Artuso, C. Bebek, K. Berkelman, D. Besson, T. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, P. S. Drell, R. Ehrlich, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, K. Honscheid, J. Kandaswamy, N. Katayama, D. L. Kreinick, J. D. Lewis, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, S. Nandi, E. Nordberg, C. O'Grady, J. R. Patterson, D. Peterson, M. Pisharody, D. Riley, M. Sapper, M. Selen, A. Silverman, H. Worden, M. Worris, A. J. Sadoff, P. Avery, A. Freyberger, J. Rodriguez, J. Yelton, S. Henderson, K. Kinoshita, F. Pipkin, M. Procario, M. Saulnier, R. Wilson, J. Wolinski, D. Xiao, H. Yamamoto, R. Ammar, P. Baringer, D. Coppage, R. Davis, P. Haas, M. Kelly, N. Kwak, H. Lam, S. Ro, Y. Kubota, J. K. Nelson, D. Perticone, R. Poling, and S. Schrenk
Subjects: Semileptonic decay, Physics, Crystallography, Particle decay, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Cornell Electron Storage Ring
Abstract: Using the CLEO detector at the Cornell Electron Storage Ring, we have performed a direct measurement of the ratio of {ital D}{sup 0} semileptonic branching fractions into vector and pseudoscalar final states. We find {ital B}({ital D}{sup 0}{r arrow}{ital K}{sup *{minus}}{ital e+}{nu}{sub {ital e}})/{ital B}({ital D}{sup 0}{r arrow}{ital K}{sup {minus}}{ital e+}{nu}{sub {ital e}})=0.51{plus minus} 0.18{plus minus}0.06, in agreement with the ratio derived by the E691 experiment which compares {ital D}{sup +} and {ital D}{sup 0} final states. We also set an upper limit on the ratio {ital B}({ital D}{sup 0}{r arrow}{ital {bar K}}{sup *0}{pi}{sup {minus}}{ital e+}{nu}{sub {ital e}})/{ital B}({ital D}{sup 0}{r arrow}{ital K}{sup *{minus}}{ital e}{nu}{sub {ital e}}){lt}0.64 at 90% confidence level.
Published: 1991

43. 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

44. 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

45. 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

46. 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

47. 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

48. CLEOII trigger system

Author: Glen D. Crawford, Mats A Selen, John Dobbins, E. I. Shibata, M. Worris, C. R. Ng, J. Kandaswamy, M. Pisharody, J. Dominick, R. S. Galik, C. Bebek, W.-M. Yao, K. Kinoshita, R. L. McIlwain, Philip Daniel Mauskopf, and Y. Zhu
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, ComputerSystemsOrganization_COMPUTERSYSTEMIMPLEMENTATION, Physics::Instrumentation and Detectors, Detector, High Energy Physics::Experiment, Cornell Electron Storage Ring, Instrumentation
Abstract: We present a description of the trigger system used in the CLEOII detector currently in operation at the Cornell Electron Storage Ring.
Published: 1991

49. 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

50. 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

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