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93 results on '"H.G.J.M. Tiecke"'

51. A search for the S(1936) in 100 GeV pBe interactions

Author

M. Rozanska, C. Daum, C.J.S. Damerell, L. W. Wiggers, G. Polok, Z. Hajduk, G. Lutz, A. Wylie, J.C. Kluyver, A. Pugl, B.D. Hyams, W. Hoogland, M. Turala, Fred Wickens, R. J. Tapper, U. Stierlin, Marcos Cerrada, D. G. Bardsley, R. Klanner, G. J. Blanar, C. Hardwick, A. R. Gillman, R. J. Whyley, V. Chabaud, Martine Bosman, W. Faissler, G. Lütjens, H. Dietl, A. Dwuraźny, L. Görlich, T. W. L. Sanford, H.G.J.M. Tiecke, J. Malos, W. Blum, P. Sharp, W. Männer, R. Jongerius, W. Spierenburg, L. Hertzberger, Jos Vermeulen, P. Weilhammer, Rowan Bailey, D. Giddings, K. Rybicki, and E. Lorenz

Subjects
Nuclear physics, Physics, Momentum, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Cross section (physics), Invariant mass, Nuclear Experiment, Nucleon, Standard deviation
Abstract

A search for the S(1936) has been made in the invariant mass spectrum of pp-pairs produced inclusively in proton-beryllium interactions at 100 GeV incident momentum. No enhancement is observed, giving a 3 standard deviation upper limit on the cross section of 220 nb/nucleon for production of a narrow pp state around ≈ 1940 MeV in the x F range 0.18 x F

Published
1981

52. Observation of double ø-meson production in 100 and 175 GeV π−-Be interactions

Author

R. Jongerius, M. Róz̀anśka, Rowan Bailey, L. Görlich, C. Daum, W. Spierenburg, C.J.S. Damerell, V. Chabaud, B.D. Hyams, W. Faissler, G. Lütjens, T. W. L. Sanford, H. Dietl, A. Wylie, K. Rybicki, E. Lorenz, Marcos Cerrada, P. Weilhammer, G. Polok, L. Hertzberger, D. Giddings, A. R. Gillman, P. Sharp, H.G.J.M. Tiecke, Martine Bosman, W. Männer, Jos Vermeulen, M. Turala, D. G. Bardsley, Z. Hajduk, C. Hardwick, G. J. Blanar, R. J. Tapper, L. W. Wiggers, A. Pugl, Fred Wickens, G. Lutz, U. Stierlin, R. Klanner, A. Dwuraźny, W. Hoogland, J. Malos, W. Blum, and R. J. Whyley

Subjects
Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Particle physics, Meson production, Nuclear Experiment, Uncorrelated
Abstract

Inclusive oo production has been studied in π−-Be interactions for 100 and 175 GeV incident momentum. An upper limit of 72 nb has been set for σ(π − Be → η c (2980) + X ) s BR (η c → oo) at 175 GeV . At both momenta the number of oo events is larger than expected for uncorrelated o pairs. A narrow width enhancement is observed at Moo≈2100 MeV with a 4 standard deviation significance.

Published
1981

53. On-line event selection with the FAMP microprocessor system

Author

L. Hertzberger, H.G.J.M. Tiecke, L. W. Wiggers, D. Gosman, W. Hoogland, G. de Rijk, C. Daum, Hans Dijkstra, and C. Hardwick

Subjects
Reduction (complexity), Physics, Particle decay, Particle physics, Large Hadron Collider, Meson, Hadron, General Engineering, High Energy Physics::Experiment, Invariant mass, Elementary particle, Line (text file), Nuclear Experiment
Abstract

In the experiment NA11 at the CERN SPS the MC68000 based FAMP system has been succesfully implemented in a second stage trigger. It was used in a study of inclusive φ-meson production to select φ →K + K − decays by determining the charged K-meson trajectories and calculating the K + K − invariant mass. A trigger rate reduction by a factor of 25 and an increase in the number of recorded φ-decays per unit time by a factor of 8 has been achieved.

Published
1983

54. Lifetime measurement of Ds-mesons

Author

C. Daum, Stephen Watts, H.F. Fawcett, G. de Rijk, U. Stierlin, A. Wylie, T. Gooch, Fred Wickens, R. Klanner, M. Turala, T. Zeludziewicz, K. Rybicki, Z. Hajduk, T. Böhringer, H. Palka, L. Görlich, V. Chabaud, S. Kwan, C.J.S. Damerell, G. Lütjens, Martine Bosman, H. Becker, L. W. Wiggers, B.D. Hyams, V. Castillo, D. P. Kelsey, G. Waltermann, E. Neugebauer, H. Dietl, P. Weilhammer, W. Männer, J. Richardson, G. Lutz, R.S. Gilmore, M. Pepe, H.G.J.M. Tiecke, J. Kemmer, D. Buchholz, J. Malos, S. Gill, A. R. Gillman, H. J. Seebrunner, and U. Kötz

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Meson, Physics::Instrumentation and Detectors, Nuclear Theory, Measure (physics), High resolution, Sample (graphics), Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment, Silicon microstrip detectors
Abstract

We have observed a sample of 21 unambiguous decays of Ds mesons into KKπ hadronically produced in the NA11 and NA32 experiments at the CERN SPS using high resolution silicon microstrip detectors. We measure the mean lifetime and the mass of the Ds meson to be (3.3±0.61.0)x10−13 s and 1972.7 ± 1.5 ± 1.0 MeV/c2, respectively.

Published
1987

55. Perfomance of a compensating lead-scintillator hadronic calorimeter

Author

H.G.J.M. Tiecke, M. Tsirou, M. Lomperski, W. Vogel, M.A. Garcia, Gm Levman, E. Bernardi, D. Lüke, G. Drews, Robert Klanner, Eduardo Ros, U. Kötz, and F. Selonke

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Muon, Physics::Instrumentation and Detectors, Hadron, High Energy Physics::Experiment, Electron, Scintillator, Nuclear Experiment, Instrumentation, Photon yield, Leakage (electronics)
Abstract

We have built a sandwich calorimeter consisting of 10 mm thick lead plates and 2.5 mm thick scintillator sheets. The thickness ratio between lead and scintillator was optimized to achieve a good energy resolution for hadrons. We have exposed this calorimeter to electrons, hadrons and muons in the energy range between 3 and 75 GeV, obtaining an average energy resolution of 23% E for electrons and 44% E for hadrons. For energies above 10 GeV and after leakage corrections, the ratio of electron response to hardron response is 1.05.

Published
1987

56. Experimental study of uranium plastic scintillator calorimeters

Author

H.G.J.M. Tiecke, A. Bamberger, F. Selonke, E. Bernardi, K. Dierks, Eduardo Ros, U. Kötz, Jonathan W. Martin, M.A. Garcia, G. Levman, J.J. Engelen, J. Krüger, Fernando Barreiro, J. Straver, D. Lüke, G. D'Agostini, Robert Klanner, R. van der Stad, and G. Drews

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Muon, ZEUS (particle detector), Physics::Instrumentation and Detectors, chemistry.chemical_element, Electron, Scintillator, Uranium, Calorimeter, Nuclear physics, chemistry, Depleted uranium, High Energy Physics::Experiment, Nuclear Experiment, Instrumentation
Abstract

As a preparation for the ZEUS high resolution calorimeter, sampling calorimeters made from 3.2 mm plates of depleted uranium read out by plastic scintillator of 3 mm and 5 mm thickness have been built. The response of hadrons, electrons and muons has been measured in the energy range between 3 and 100 GeV. In agreement with predictions, the relative response of electrons and hadrons as well as the hadronic energy resolution depend strongly on the thickness of the plastic scintillator. For 3.2 mm depleted uranium and 3 mm thick scintillator we observe over the full energy range equal response for electrons and hadrons; a hadronic energy resolution of 34.5% E[ GeV ] is obtained. Results are given for the spatial resolution for electrons and hadrons. Finally, results from a lead scintillator calorimeter built as a prestudy before uranium plates were available are reported.

Published
1989

57. Leading proton and antiproton distributions in proton-nucleus and antiproton-nucleus interactions

Author

Z. Hajduk, H. Dietl, T. Żeludziewicz, K. Rybicki, E. Lorenz, G. Lutz, P. Weilhammer, C. Daum, R.S. Gilmore, C. Hardwick, R.J. Tapper, A. Wylie, W. Spierenburg, A. Dwuraźny, H.G.J.M. Tiecke, M. Jeżabek, L. Görlich, C.J.S. Damerell, G. Lütjens, Rowan Bailey, G. de Rijk, H. J. Seebrunner, Fred Wickens, Martine Bosman, Jos Vermeulen, A. R. Gillman, W. Hoogland, B.D. Hyams, M. Turala, M. Rozanska, G. Waltermann, U. Stierlin, L. W. Wiggers, W. Männer, G. J. Blanar, G. Polok, R. Klanner, Hans Dijkstra, V. Chabaud, and J. Malos

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Proton, Nuclear Theory, Parton, Spectral line, Nuclear physics, medicine.anatomical_structure, Antiproton, medicine, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Beam energy, Nucleus, Bar (unit)
Abstract

We present a study of leading protons and antiprotons inp-nucleus and $$\bar p$$ -nucleus on Be, Cu, Ag, W, and U targets. The experiment was performed at the CERN-SPS at a beam energy of 120 GeV. For all targets a suppression of secondary antiprotons with respect to protons is observed. The difference between the $$\bar p$$ andp spectra increases with decreasing χ-values and the effect is stronger for heavier nuclei. The features of the data are qualitatively consistent with multiple-collisions modesls. The data are analysed in terms of a dual parton model which gives a satisfactory description of leadingp and $$\bar p$$ spectra.

Published
1985

58. A study of non-charge-exchange production in the reaction at 4.2 GeV/c

Author

H.G.J.M. Tiecke, G. G.G. Massaro, S. Yamashita, H. Voorthuis, S-O. Holmgren, L. McDowell, Louis Lyons, R.J. Hemingway, B. Jongejans, J.J. Engelen, E.W. Kittel, Joris S. M. Vergeest, P. Grossmann, M.J. Losty, and M.J. Holwerda

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Amplitude, Parity (physics), Charge exchange
Abstract

The Kπ− system produced in the reaction Kp → K0π−p at 4.2 GeV/c is studied using high-statistics bubble-chamber data. The spin-parity structure is analysed as a function of the K0π− mass up to 1.52 GeV. Production of K∗(890) and K∗(1420) is observed in helicity-0 and helicity-1 states. Contributions of natural and unnatural parity exchange are present. Considerable S-wave production is observed over the whole mass region considered. We also study the t′ dependence of the K∗(890) and K∗(1420) amplitudes. A comparison of our results on K∗(890) production with the results of an analysis of charge-exchange K∗(890) production, allows the separation of I = 0 and I = 1 exchange amplitudes. Some qualitative remarks are made concerning K∗(1420) production.

Published
1978

59. Evidence for a spin-5 boson resonance at 2300 MeV

Author

B. Alper, H. Palka, A. Berglund, M. J. Glaubman, G. Thompson, C.J.S. Damerell, V. Chabaud, A. Zalewska, M. Turala, J. Gallivan, H. Dietl, M. G. Bowler, W. Männer, B.D. Hyams, Antonio González-Arroyo, P. Van Deurzen, I. Blakey, Marcos Cerrada, J. Hardwick, R. J. Cashmore, Robert Klanner, J. Turnau, J. G. Loken, Fred Wickens, G. J. Blanar, G. Polok, H. Becker, W. Hoogland, A. Dwurazny, G. Lutz, J. Spalding, G. Lütjens, A. R. Gillman, L. Hertzberger, C. Daum, K. Rybicki, E. Lorenz, S. Peters, P. Weilhammer, H.G.J.M. Tiecke, and U. Stierlin

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle decay, Pair production, G-parity, Resonance, Elementary particle, Nuclear Experiment, Quantum number, Spin (physics), Particle Physics - Experiment, Boson
Abstract

Evidence is given for the existence of a spin-5 boson resonance from the analysis of the reaction π − p→K + K − n at 62 GeV incident momentum. A simplified amplitude analysis with a Breit-Wigner ansatz leads to a mass 2307 ± 6 MeV and a width of 245 ± 20 MeV. The quantum numbers of the resonance are J P = 5 − , C = −1, and very probably I G = 1 + .

Published
1980

60. Measurement of branching ratios and branching fractions of the charmed meson D0

Author

Mariusz Witek, H. Palka, Z. Hajduk, E. Higon, L. Görlich, Stephen Watts, H. Dietl, V. Castillo, D. P. Kelsey, V. Chabaud, H. Becker, C. Daum, T. Gooch, G. Waltermann, R.S. Gilmore, J. Malos, C.J.S. Damerell, B. Lücking, G. Lütjens, H.G.J.M. Tiecke, A. R. Gillman, J. Richardson, S. Kwan, W. Männer, P. Weilhammer, T. Zeludziewicz, K. Rybicki, M. Bosman, T. Böhringer, E. Neugebauer, G. Lutz, U. Stierlin, S. Barlag, R. Klanner, H. J. Seebrunner, M. Pepé, Fred Wickens, L. W. Wiggers, and P. Gras

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Meson, High Energy Physics::Experiment, Branching (polymer chemistry), Vertex (geometry)
Abstract

In the CERN NA32 experiment a high-resolution silicon vertex detextor and a purely topological approach were used to investigate various decays of charmed particles. Branching ratios of the D 0 were determined from about 600 fully reconstructed decay vertices. 84 events had a D 0 decay vertex in addition to a fully reconstructed decay of the associated charmed particle. Using these events and the above branching ratios, we have determined branching fractions for 20 channels, including 8 new ones.

Published
1989

61. Inclusive ϕ-meson production inK −, $$\bar p$$ andpBe interactions at 100 GeV/c

Author

U. Stierlin, A. Dwuraźny, R. Klanner, Marcos Cerrada, B.D. Hyams, Jos Vermeulen, C.J.S. Damerell, Martine Bosman, W. Blum, W. Faissler, V. Chabaud, H. Dietl, G. Polok, R. J. Tapper, L. W. Wiggers, J. Malos, W. Hoogland, G. J. Blanar, L. Görlich, A. R. Gillman, W. Spierenburg, M. Turala, P. Sharp, T. W. L. Sanford, W. Männer, M. Rozaska, D. G. Bardsley, A. Pugl, A. Wylie, Fred Wickens, H.G.J.M. Tiecke, C. Hardwick, C. Daum, Z. Hajduk, G. Lutz, R. Jongerius, D. Giddings, Rowan Bailey, P. Weilhammer, G. Lütjens, K. Rybicki, E. Lorenz, L. Hertzberger, and R. J. Whyley

Subjects
Quark, Nuclear physics, Particle acceleration, Physics, Particle physics, Meson production, Physics and Astronomy (miscellaneous), Production (computer science), Elementary particle, Engineering (miscellaneous), Bar (unit)
Abstract

Inclusive ϕ-meson production has been measured for 100 GeV/cK−,\(\bar p\) andp incident on a Be target. Differential cross sectionsdσ/dxF anddσ/dp⊥2 are presented in the interval 0.075

Published
1983

62. Upper limits for charm production in 150 GeV p-Be interactions

Author

H.G.J.M. Tiecke, T. Zeludziewicz, M. Rozanska, L. W. Wiggers, Martine Bosman, M. Turala, Robert Klanner, B.D. Hyams, Fred Wickens, G. Waltermann, W. Männer, Hans Dijkstra, G. Polok, Rowan Bailey, G. Lütjens, W. Spierenburg, G. Lutz, C. Daum, V. Chabaud, C.J.S. Damerell, R. J. Tapper, U. Stierlin, R.S. Gilmore, A. R. Gillman, J. Malos, H. J. Seebrunner, C. Hardwick, A. Dwurazny, A. Wylie, L. Görlich, P. Weilhammer, K. Rybicki, T. Böhringer, W. Hoogland, Z. Hajduk, H. Becker, Jos Vermeulen, Marcos Cerrada, and E. Belau

Subjects
Systematic error, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Nuclear Theory, Hadron, Large aperture, Electron, Charmed baryons, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

A search has been made for the hadronic production of charmed baryons and mesons with a large aperture forward magnetic spectrometer using 150 GeV protons originating from the CERN-SPS. A prompt electron trigger was used as a signature for charm. Upper limits at 90% confidence level have been obtained for the production of Λ c + D 0 , D 0 D + and D − : σ(Λ c ) ⩽ 8 μ b , σ( D 0 ) ⩽ 64 μ b , σ( D 0 ) b , σ( D + ) ⩽ 51 μ b and σ( D − ) ⩽ 49 μ b per nucleon, assuming linear A dependence. Systematic errors due to uncertainties in branching ratios and to model dependence of the acceptance calculation are discussed.

Published
1984

63. Study of the elastic scaterring from the reaction K−p→K−π−pπ+ at 4.25 GeV/c incident K− momentum

Author

W. J. Metzger, R. T. Van de Walle, A.G. Tenner, R.A. van Meurs, P.M. Heinen, H. Voorthuis, H.G.J.M. Tiecke, and B. Jongejans

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Effective mass (solid-state physics), Angular distribution, Pion, Scattering, Extrapolation, Spherical harmonics, Scattering length, Atomic physics
Abstract

Results on the elastic K−π− scattering have been obtained from a study of the K−π− system in 15 000 events of the type K−p→K−π−pπ+ at a K− beam momentum of 4.25 GeV/c. The on-mass-shell values of the spherical harmonic moments of the K−π− scattering angular distribution and the K−π− elastic cross section have been obtained by extrapolation to the pion pole. From these values we determined the s- and p-wave phase shifts δ03 and δ13 as a function of the effective mass of the K−π− system between threshold and 1.25 GeV/c2. The value of |δ03| is smaller than 17° for all mass values and the existence of a p-wave cannot be neglected. At mK−π− = 1.18 GeV/c2 there are two solutions for the phase shifts. On the average, the cross section of the K−π− elastic scattering over the region of the effective mass considered amounts to approximately 2.5 mb.

Published
1973

64. A study of the hypercharge exchange reactions at an incoming momentum of 4.25 GeV/c

Author

J.C. Kluyver, B. Jongejans, J. Timmermans, W. Hoogland, A.J. de Groot, W. J. Metzger, H.G.J.M. Tiecke, and G. G.G. Massaro

Subjects
Nuclear physics, Density matrix, Momentum, Physics, Nuclear and High Energy Physics, Hypercharge, Particle physics, Amplitude, Hyperon, Bubble chamber, Vector meson, Polarization (waves)
Abstract

Results are reported of a study of the hypercharge reactions K−p → ωΛ (la), K−p → φΛ (lb), K−p → φ∑o (lc), K−p → ϱoΛ (ld), K−p → ϱo∑o (le), K−p → ϱ−∑+ (lf) in a 12 events/ub bubble chamber experiment using K−mesons of 4.25 GeV/c momentum. Total and differential cross sections are presented as well as the density matrix elements of the peripherally produced vector meson and (except for reaction (1f)) the hyperon polarization. For reactions (1a) and (1b) an amplitude analysis is performed. The mass and the width of the ϱ−, φ− and f-meson have been determined.

Published
1974

65. Measurement of mass and lifetime of hadronically produced charmed F mesons

Author

C.J.S. Damerell, Fred Wickens, A. R. Gillman, C. Daum, U. Koetz, Martine Bosman, C. De Rijk, H.G.J.M. Tiecke, Stephen Watts, R. J. Tapper, E. Belau, E. Neugebauer, G. Lutz, V. Chabaud, U. Stierlin, T. Zeludziewicz, C. Hardwick, R. Klanner, M. Rozanska, Z. Hajduk, L. W. Wiggers, A. Wylie, Hans Dijkstra, H. J. Seebrunner, M. Turala, Rowan Bailey, G. Waltermann, W. Männer, K. Rybicki, T. Böhringer, B.D. Hyams, P. Weilhammer, G. Lütjens, R.S. Gilmore, W. Hoogland, J. Malos, and S. Gill

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Spectrometer, Physics::Instrumentation and Detectors, Nuclear Theory, chemistry.chemical_element, law.invention, Nuclear physics, Telescope, chemistry, law, High Energy Physics::Experiment, Beryllium, Nuclear Experiment, Particle Physics - Experiment, Silicon microstrip detectors
Abstract

We have observed three unique decays of F mesons into KK π and five unique decays of D mesons into KK π using the NA11 spectrometer together with a telescope of high-resolution silicon microstrip detectors. The mass value obtained for the F meson is (1975 ± 4) MeV, the lifetime (3.2± 1.3 3..0 )×10 −13 s.

Published
1984

66. A measurement of the η′ spin parity

Author

P. F. Loverre, S-O. Holmgren, Marcos Cerrada, B. Foster, F. Marzano, R. Blokzijl, J. Timmermans, H.G.J.M. Tiecke, G. G.G. Massaro, V. Chaloupka, F. Wagner, B. Jongejans, R.J. Hemingway, M.J. Losty, W.L. McDowell, and D. J. Schotanus

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Statistical sensitivity, Bubble chamber, Parity (physics)
Abstract

The spin parity of the η′ (958) is studied in the reaction K − p → η ' Λ at 4.2 GeV/ c , using bubble chamber data with a statistical sensitivity of 128 events/μb. The data unambiguously prefer the 0 − assignment.

Published
1977

67. Spin-parity structure of the system produced in the charge-exchange reaction at 4.2 GeVc

Author

J.S.M. Vergeest, M. Cerrada, V. Chaloupka, Ph. Gavillet, J.B. Gay, R.J. Hemingway, M.J. Losty, J.J. Engelen, E.W. Kittel, W.J. Metzger, H.G.J.M. Tiecke, B. Jongejans, H. Voorthuis, and G.F. Wolters

Subjects
Physics, Nuclear and High Energy Physics, Branching fraction, Partial wave analysis, S-wave, Parity (physics), Atomic physics, Polarization (waves), Charge exchange
Abstract

A partial wave analysis of the K 0 π + π − system produced in the charge exchange reaction K − p → ( K 0 π + π − ) n at 4.2 GeV/ c has been performed both as a function of Kππ mass and of t ′. The 1 + S wave forms the largest contribution to the K ππ system and peaks at roughly the same mass as the Q in diffractive K ππ production. The polarization properties of the 1 + S ( K ∗ π) and 1 + S (Kϱ) waves differ fromt those of the diffractive 1 + wave. There is some evidence for a resonance contribution to 1 + S ( K ∗ π) . The strong 2 + wave the K ∗ (1420) and the K ϱ/ K ∗ ϱ decay branching ratio determined to be 0.36±0.10. An enhancement with spin-parity 1 − is observed under K ∗ (1420) .

Published
1976

68. Joint production of ? mesons and? �,? 0,p, $$\bar p$$ ,K s 0 andK � in hadronic interactions

Author

R. J. Tapper, E. Belau, H. Palka, Z. Hajduk, C.J.S. Damerell, H. J. Seebrunner, H.G.J.M. Tiecke, U. Stierlin, A. R. Gillman, R. Klanner, A. Wylie, S. Kwan, M. Turala, S. Watts, C. Daum, C. Hardwick, Fred Wickens, M. Pepé, G. Lütjens, V. Chabaud, R. Bailey, L. W. Wiggers, Hans Dijkstra, Martine Bosman, P. Weilhammer, J. Richardson, R.S. Gilmore, B.D. Hyams, G. de Rijk, G. Waltermann, W. Männer, U. Kötz, K. Rybicki, T. Böhringer, E. Neugebauer, G. Lutz, T. Zeludziewicz, S. Gill, J. Malos, and W. Hoogland

Subjects
Physics, Physics and Astronomy (miscellaneous), Meson, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, Parton, Nuclear physics, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Engineering (miscellaneous), Joint (geology), Bar (unit)
Abstract

The joint production of ϕ mesons andπ ±,π 0,p, $$\bar p$$ ,K 0 andK ± is investigated using a sample of 600,000 inclusive ϕ meson events obtained in hadron Be interactions with incidentπ ±,p, $$\bar p$$ andK ± beams. Evidence is presented for the joint production of ϕ mesons and strange particles produced with non-strange incident beams. With incidentK ± beam the number of additional strange particles is suppressed. The results are found to be in agreement with the qualitative predictions of a parton fusion model. The comparison with the Lund model for lowp T processes is fair.

Published
1986

69. Production ofD, D * andD s mesons in 200 GeV/c ?? K ? andp-Si interactions

Author

E. Neugebauer, C.J.S. Damerell, G. Lutz, G. de Rijk, E. Higon, Mariusz Witek, A. R. Gillman, P. Weilhammer, B.D. Hyams, Martine Bosman, B. Lücking, D. Buchholz, G. Waltermann, T. Zeludziewicz, A. Wylie, W. Männer, U. Stierlin, U. Kötz, S. Barlag, R. Klanner, H.G.J.M. Tiecke, H. J. Seebrunner, K. Rybicki, H.F. Fawcett, T. Böhringer, C. Daum, L. W. Wiggers, G. Lütjens, L. Görlich, J. Kemmer, R.S. Gilmore, H. Dietl, Fred Wickens, V. Chabaud, V. Castillo, D. P. Kelsey, M. Turala, Z. Hajduk, H. Palka, S. Kwan, H. Becker, J. Richardson, J. Malos, S. Gill, T. Gooch, M. Pepé, S. Watts, and P. Gras

Subjects
Physics, Large Hadron Collider, Physics and Astronomy (miscellaneous), Silicon, Meson, Hadron, chemistry.chemical_element, Charge (physics), Elementary particle, Nuclear physics, chemistry, Engineering (miscellaneous), Particle Physics - Experiment, Beam (structure), Conjugate
Abstract

The NA 32 experiment at the CERN SPS has collected 38 million hadronic interactions with incident 200 GeV/c π−,K− andp beam. Using a segmented silicon active target and a telescope of high resolution silicon microstrip counters we have selected fully reconstructedD0→K−π+,D0→K−π+π+π−,D+→K−π+π+,Ds+→K−K+π+π+ and charge conjugate decays. The integrated cross-sections forDo,D+D*+ andDs+ meson production and the dependence of the cross-section on longitudinal and transverse momentum of theD are presented.

Published
1988

70. Production and decay properties of D and D∗ mesons in π−Be interactions

Author

W. Faissler, H. Dietl, G. Waltermann, Jos Vermeulen, J. Malos, W. Männer, E. Wickens, W. Hoogland, R.J. Tapper, Martine Bosman, A. Dwurazny, B.D. Hyams, D. G. Bardsley, R. Jongerius, U. Stierlin, Rowan Bailey, H.G.J.M. Tiecke, Z. Hajduk, R. Klanner, T. W. L. Sanford, W. Spierenburg, L. Görlich, G. Lutz, V. Chabaud, Marcos Cerrada, R. J. Whyley, C.J.S. Damerell, R.S. Gilmore, K. Rybicki, E. Lorenz, T. Böhringer, H. Becker, G. J. Blanar, A. Wylie, G. Lütjens, M. Gettner, T. Zeludziewicz, C. Hardwick, C. Daum, D. Giddings, A. R. Gillman, Hans Dijkstra, P. Weilhammer, M. Rozanska, L. W. Wiggers, M. Turala, P. Sharp, G. Polok, H. J. Seebrunner, and L. Hertzberger

Subjects
Physics, Particle system, Nuclear and High Energy Physics, Transverse plane, Meson, Mass spectrum, Atomic physics, Particle Physics - Experiment
Abstract

D ∗± , D ± , D 0 , and D 0 production has been observed in π −Be interactions at 120, 175, and 200 GeV. The dependence of the D cross section on transverse and longitudinal momentum is presented. The ratio of D∗ to D and charged to neutral D production is determined. Leading particle effects in D production are investigated. Relative branching ratios for several D decay modes are evaluated. A limit on D 0 − D 0 mixing is given.

Published
1983

71. A-dependence study of inclusive ϑ production

Author

H. J. Seebrunner, Martine Bosman, G. Lütjens, A. Wylie, W. Hoogland, C. Daum, Stephen Watts, R. J. Tapper, V. Chabaud, B.D. Hyams, U. Stierlin, E. Neugebauer, Z. Hajduk, M. Turala, R. Klanner, R.S. Gilmore, G. Lutz, E. Belau, J. Malos, S. Gill, U. Koetz, C. Hardwick, T. Zeludziewicz, Hans Dijkstra, G. Waltermann, W. Männer, H.G.J.M. Tiecke, G. de Rijk, A. R. Gillman, P. Weilhammer, M. Rozanska, L. W. Wiggers, K. Rybicki, T. Böhringer, R. Bailey, Fred Wickens, and C.J.S. Damerell

Subjects
Physics, Physics and Astronomy (miscellaneous), chemistry, Meson, Analytical chemistry, Tantalum, chemistry.chemical_element, Elementary particle, Production (computer science), Beryllium, Atomic physics, Engineering (miscellaneous)
Abstract

TheA-dependence of the inclusive ϑ meson cross-section is measured using two target materials, beryllium and tantalum, in the kinematic range 0

Published
1984

72. Measurement of the lifetime of charged and neutralD mesons with high resolution silicon strip detectors

Author

M. Rozanska, A. R. Gillman, E. Belau, L. W. Wiggers, W. Hoogland, A. Wylie, Martine Bosman, C. Hardwick, G. de Rijk, J. Richardson, J. Kemmer, U. Stierlin, R. Klanner, Z. Hajduk, H. Palka, E. Neugebauer, R. Bailey, V. Chabaud, Hans Dijkstra, G. Lutz, S. Kwan, P. Weilhammer, J. Malos, U. Kötz, K. Rybicki, T. Böhringer, M. Turala, Fred Wickens, S. Gill, T. Zeludziewicz, C.J.S. Damerell, M. Pepé, H.G.J.M. Tiecke, G. Lütjens, B.D. Hyams, R. J. Tapper, G. Waltermann, W. Männer, R.S. Gilmore, H. J. Seebrunner, and C. Daum

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Silicon, chemistry, Meson, chemistry.chemical_element, High resolution, High Energy Physics::Experiment, Elementary particle, Atomic physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract

We have measured the lifetime of charged and neutralD mesons using high resolution silicon strip detectors in the NA11 spectrometer at the CERN SPS. TheD mesons were produced in 200 GeV π− interactions. We obtain a value of $$\tau _{D^ \pm } = \left( {10.6\begin{array}{*{20}c} { + 3.6} \\ { - 2.4} \\ \end{array} } \right) \cdot 10^{ - 13} s$$ based on 28, and $$\tau _{D^0 } = \left( {3.7\begin{array}{*{20}c} { + 1.0} \\ { - 0.7} \\ \end{array} } \right) \cdot 10^{ - 13} s$$ based on 26 fully reconstructed decays for the lifetime of the charged and the neutralD meson, respectively. For the ratio $$\tau _{D^ \pm } /\tau _{D^0 }$$ we find 2.8 −0.8 +1.1 .

Published
1985

73. Interference between Δ++ and Q− production in K−p → K−π−π+p at 4.25 GeV/c

Author

R. T. Van de Walle, H. Voorthuis, J.N. Macnaughton, W. Kittel, W. J. Metzger, P.M. Heinen, B. Jongejans, and H.G.J.M. Tiecke

Subjects
Physics, Nuclear and High Energy Physics, media_common.quotation_subject, Production (computer science), Atomic physics, Interference (genetic), Asymmetry, media_common, Interpretation (model theory)
Abstract

Evidence is found for overlap and interference between Δ ++ and Q − production in K − p → K − π − π + p at 4.25 GeV/ c . The strong forward asymmetry observed in the Δ ++ decay is such that it cannot be explained by the contribution of p π + S- and P-waves only. It finds a natural interpretation in terms of overlap between Δ ++ ar Q − production. The interference between Δ ++ and Q − production is constructive over essentially the whole Δ ++ region.

Published
1975

74. Measurement ofD meson production in 200 GeV π−-Be interactions

Author

U. Kötz, H. J. Seebrunner, Fred Wickens, H.G.J.M. Tiecke, E. Belau, W. Hoogland, E. Neugebauer, G. Lutz, J. Richardson, A. Wylie, G. Waltermann, W. Männer, R. J. Tapper, Z. Hajduk, M. Rozanska, L. W. Wiggers, Martine Bosman, U. Stierlin, S. Kwan, R. Klanner, S. Gill, C.J.S. Damerell, R.S. Gilmore, P. Weilhammer, C. Daum, G. de Rijk, R. Bailey, V. Chabaud, J. Malos, M. Turala, K. Rybicki, T. Böhringer, M. Pepé, G. Lütjens, A. R. Gillman, T. Zeludziewicz, H. Paŀka, B.D. Hyams, J. Kemmer, Hans Dijkstra, and C. Hardwick

Subjects
Nuclear physics, Physics, Single electron, Particle physics, Meson production, Physics and Astronomy (miscellaneous), Meson, Elementary particle, Quantum field theory, Engineering (miscellaneous), Silicon microstrip detectors, Vertex (geometry)
Abstract

We have measured the differential and total cross sections ofD meson production in 200 GeV π−-beryllium interactions, using a sample of 48 fully reconstructed and nearly background-freeD mesons in the decay channelsK∓π±,K∓π±π± andK∓π∓π±π±. A single electron trigger has been used to select events containing a pair of charmed particles. A vertex telescope of 6 silison microstrip detectors allowed the reconstruction of tracks of charged secondaries and the reconstruction of primary and decay vertices with high precision. The ratio of branching fractions for\(\mathop {D^0 }\limits^{( - )} \to K^ \mp \pi ^ \pm \) to\(\mathop {D^0 }\limits^{( - )} \to K^ \mp \pi ^ \mp \pi ^ \pm \pi ^ \pm \), and an upper limit for\(D^0 - \bar D^0 \) mixing are presented.

Published
1986

75. Lifetimes of charged and neutralD mesons

Author

C.J.S. Damerell, B.D. Hyams, Martine Bosman, M. Turala, Z. Hajduk, B. Lücking, H. Palka, V. Castillo, D. P. Kelsey, E. Neugebauer, H. Dietl, G. Lutz, S. Gill, C. Daum, A. Wylie, H. J. Seebrunner, P. Weilhammer, T. Zeludziewicz, A. R. Gillman, S. Kwan, H. Becker, R.S. Gilmore, J. Kemmer, G. de Rijk, Fred Wickens, Stephen Watts, K. Rybicki, H.F. Fawcett, V. Chabaud, H.G.J.M. Tiecke, T. Gooch, T. Böhringer, L. Görlich, L. W. Wiggers, E. Higon, U. Kötz, D. Buchholz, G. Waltermann, W. Männer, M. Pepe, J. Richardson, J. Malos, G. Lütiens, P. Gras, U. Stierlin, S. Barlag, and R. Klanner

Subjects
Physics, Particle physics, Large Hadron Collider, Physics and Astronomy (miscellaneous), Silicon, Meson, Spectrometer, chemistry.chemical_element, Elementary particle, Nuclear physics, Particle acceleration, chemistry, Field theory (psychology), Quantum field theory, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

We have measured the lifetimes of hadronically produced charged and neutralD mesons using silicon microstrip detectors and an active silicon target in the NA32 spectrometer at the CERN SPS. We obtainτD± = (10.9±1.51.9)·10−13s andτD(−)10 = (4.2±0.5)·10−13s based on 59 and 90 fully reconstructed decays respectively, giving a ratioτD±/τD(−)10 of 2.6 ±0.5.

Published
1987

76. InclusiveK *0(890) and $$\bar K*^0 $$ (890) production on beryllium byK − and π− at 175 GeV

Author

Z. Hajduk, C.J.S. Damerell, E. Belau, W. Hoogland, Jos Vermeulen, V. Chabaud, C. Dauin, G. Waltermann, A. Dwurazny, K. Rybicki, R. Bailey, Martine Bosman, T. Böhringer, G. Polok, R.S. Gilmore, G. Lutz, A. Wylie, A. R. Gillman, W. Männer, Marcos Cerrada, U. Stierlin, L. Görlich, R. J. Tappel, D. G. Bardsley, R. Klanner, J. Malos, T. Zeludziewicz, B.D. Hyams, G. Lütjens, M. Turala, W. Spierenburg, H.G.J.M. Tiecke, P. Weilhammer, Hans Dijkstra, G. de Rijk, C. Hardwick, M. Rozanska, L. W. Wiggers, H. J. Seebrunner, and Fred Wickens

Subjects
Physics, Quark, Particle physics, Physics and Astronomy (miscellaneous), Hydrogen, Hadron, chemistry.chemical_element, Nuclear physics, symbols.namesake, chemistry, symbols, Feynman diagram, Production (computer science), Beryllium, Engineering (miscellaneous), Beam (structure), Bar (unit)
Abstract

The reactions $$K^ - Be \to {}^(\bar K^) *^0 (890)X,\pi ^ - Be \to {}^(\bar K^) *^0 (890)X$$ , have been studied in a 175 GeV unseparated hadron beam in the kinematic range 0

Published
1984

77. Measurement of the lifetime of the charmed baryon Λc

Author

G. Waltermann, H. Palka, W. Männer, Stephen Watts, T. Gooch, V. Chabaud, C. Damerell, S. Kwan, H. Becker, H.G.J.M. Tiecke, B. Lücking, Fred Wickens, G. Lütjens, J. Richardson, Z. Hajduk, C. Daum, P. Gras, M. Bosman, V. Lüth, J. Malos, K. Rybicki, P. Weilhammer, R.S. Gilmore, T. Böhringer, L. W. Wiggers, H. J. Seebrunner, U. Stierlin, S. Barlag, R. Klanner, A. Gillman, M. Pepé, T. Zeludziewicz, E. Higon, E. Neugebauer, G. Lutz, H. Dietl, V. Castillo, D. P. Kelsey, and L. Görlich

Subjects
Baryon, Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Vertex (geometry)
Abstract

We present results on a sample of Λc decays obtained in the NA32 experiment in 1985 using charge-coupled devices for vertex reconstruction and a trigger on Λc→pK−π+ (and charge conjugate). We observe a distinct peak at the Λc mass on zero background. The lifetime of the Λc is determined to be (1.4±0.30.5±0.3)x10−13 s based on a sample of 14 events.

Published
1987

78. The reactions at an incoming momentum of 4.25 GeV/c

Author

J.C. Kluyver, P.M. Heinen, H.G.J.M. Tiecke, R. Blokzijl, W. Hoogland, B. Jongejans, W. J. Metzger, R. T. Van de Walle, H. Winzeler, A.J. de Groot, and A.G. Tenner

Subjects
Elastic scattering, Momentum, Physics, Nuclear and High Energy Physics, Meson, Hyperon, Atomic physics, Polarization (waves)
Abstract

A bubble-chamber study is presented of a 10 events/μb experiment using K− mesons of 4.25 GeV/c incident momentum. Differential and total cross sections are determined for 7 different reactions: K−p → K0n (la), → π0Λ (lb), → ηΛ (lc), → η′Λ (ld), → π−Σ (le), → π+Σ− (lf), K+ Ξ− (lg). The experimental characteristics in dσ/dt of each reaction are described: (la) shows a levelling off at t = 0 (GeV/c)2, a break at t = −0.6 (GeV/c)2 and no backward events, (lb) dσ/dt has a smooth behaviour and a measurable backward component with an indication of a dip at u = −0.2 (GeV/c)2, (1c) dσ/dt shows a dip in the region between t ≈ −0.2 and −0.4 (GeV/c)2, (ld) dσ/dt has a smooth behaviour; neither this reaction nor the preceding one shows a clear evidence for backward events, (le) dσ/dt has a break at t = −0.5 (GeV/c)2; there is a significant cross section in the backward region; (lf) and (lg) show mainly backward production. The polarization of the hyperon is measured in the reactions (lb), (lc), (ld) and (le) in the forward production peak. The statistics do not allow the detection of a definite structure in the polarization but the sign and magnitude are determined. An interpretation of the results is given in terms of a dual Regge model, including the effects of absorption as elaborated recently by several authors.

Published
1973

79. Measurement of beauty production in DIS and extraction at ZEUS

Author

Sarah Kate Boutle, J. F. Martin, P.F. Ermolov, B. Reisert, Guenter Wolf, B. Brzozowska, J. M. Pawlak, A. Garfagnini, James Ferrando, U. Samson, A. E. Nuncio-Quiroz, W. A. T. Wan Abdullah, M.C.K. Mattingly, L. S. Durkin, S. Magill, Rosario Nania, N. Coppola, Janna Katharina Behr, Katsuo Tokushuku, V.V. Sosnovtsev, D. Gladkov, D. Bot, M. Vázquez, Pawel Plucinski, J. M. Butterworth, R. Hamatsu, O. Bachynska, J. de Favereau, Janusz Chwastowski, P.M. Kooijman, Fernando Barreiro, I. Abt, Peter Schleper, K. Horton, Achim Geiser, V. Monaco, V. Aushev, W. Hain, S.I. Suchkov, D. Notz, H.-P. Jakob, Y.D. Ri, M. Adamus, N. Vlasov, E. Brownson, D.S. Zotkin, Matthew Wing, B.O. Zhautykov, Yasunori Yamazaki, Ben Bylsma, T. W. Jones, Giuseppe Barbagli, I. Makarenko, G. Marini, U. Noor, Y. Eisenberg, Wolfram Dietrich Zeuner, A. Bamberger, Didar Dobur, Juan Terron, S. Fazio, Roberto Sacchi, R. Walczak, I. O. Skillicorn, D. H. Saxon, Uta Klein, R. Brugnera, John Hart, Y. Aushev, D.D. Reeder, I. C. Brock, S. Antonelli, Alessandro Montanari, Allen Caldwell, G. Sartorelli, Aharon Levy, Anna Mastroberardino, P. Stopa, S. Fourletov, Ramoona Shehzadi, M. Zolko, Kerstin Borras, V. A. Kuzmin, D. Szuba, C. Zhou, A. Solano, Claudia Glasman, M. Juengst, G. Bari, Oleg Kuprash, D. Kollar, I. M. Gregor, Igor Katkov, M. Derrick, H. Hartmann, J. Maeda, Giovanna Bruni, A.G. Yagües-Molina, M. J. Costa, T. Tymieniecka, I. Rubinsky, Dong-Chul Son, R. Mankel, Wolfgang Lohmann, A. Parenti, V. Drugakov, U. Koetz, J. Ciborowski, K. Oliver, Marco Schioppa, P. G. Pelfer, Jan Figiel, G. D'Agostini, J. Tomaszewska, Vladyslav Libov, T. Y. Ling, Francois Corriveau, Denys Lontkovskyi, J. Sztuk, S. Schlenstedt, M. Ruspa, Halina Abramowicz, O. Gogota, J. Del Peso, A. Bruni, R. J. Nowak, A. Kotański, Anselmo Margotti, Lev Khein, Robert Klanner, E. Hilger, J. Grebenyuk, Tomasz Bold, L. M. Shcheglova, T. Matsumoto, P. J. Bussey, H.G.J.M. Tiecke, I. Kadenko, V. Schoenberg, E.G. Boos, G. Grigorescu, Alexander Spiridonov, I. A. Melzer-Pellmann, Manjit Kaur, B. Kamaluddin, C. Blohm, S. Kananov, Giuseppe Iacobucci, Shinichi Shimizu, Ie. Korol, L. Stanco, R. Ingbir, R. Aggarwal, O. Yu. Lukina, B.Y. Oh, Robert Ciesielski, S. Fang, Alexander Tapper, Antonino Zichichi, R. Hori, Sergei Chekanov, Z. Zulkapli, Enrico Tassi, J. J. Whitmore, Dirk-Uwe Bartsch, F. J. Sciulli, P. Luzniak, V. Viazlo, M. Kuze, A. Polini, N. Zhmak, G. F. Hartner, H. Wolfe, A. Longhin, T. Tsurugai, N.S. Pokrovskiy, T. Kanno, Valentina Sola, A. Lee, Zainol Abidin Ibrahim, L. Bellagamba, O. Behnke, I. A. Korzhavina, T. Namsoo, T. Theedt, A.G. Robertson, E. Lohrmann, Mariusz Przybycien, C. Uribe-Estrada, A. Nigro, M. Corradi, Mykhailo Lisovyi, A. Huettmann, Iwona Grabowska-Bold, Zhongliang Ren, Michele Arneodo, Y. Iga, P. Roloff, J. Schwartz, U. Karshon, A. Antonov, A.S. Proskuryakov, W. B. Schmidke, J. Szuba, A. Eskreys, A. T. Doyle, A. Keramidas, G. Grzelak, Ewelina Lobodzinska, D. Boscherini, Grzegorz Gach, Hartmut Stadie, S. Bhadra, W. Perlanski, G. F. Susinno, Thomas Schoerner-Sadenius, A. Bertolin, O. Ota, B. A. Dolgoshein, Cd Catterall, Andrii Verbytskyi, A. M. Cooper-Sarkar, A. A. Savin, U. Schneekloth, W. Słomiński, Ulf Behrens, Federico Cindolo, H. Kowalski, Yu. A. Golubkov, E. Paul, Claire Gwenlan, F. Januschek, L. Suszycki, M. Jimenez, S. De Pasquale, L. Zawiejski, S. Kitamura, N. Okazaki, John Morris, D. Hochman, M. Turcato, O. Zenaiev, F. Dal Corso, E. Ron, S. Limentani, Kunihiro Nagano, I. Singh, M. Wlasenko, Af Zarnecki, Silvia Miglioranzi, B. Musgrave, I. Gialas, P. Kaur, A. Stifutkin, Leszek Adamczyk, M.I. Ferrero, F. Karstens, B. Kahle, Roberto Carlin, Hanno Perrey, Elisabetta Gallo, Yu. Onishchuk, Tobias M. Haas, Els Koffeman, F. Mohamad Idris, Shoichi Yamada, R.C.E. Devenish, U. Holm, Matthew Forrest, K. Olkiewicz, A. Raval, J. Whyte, Danuta Kisielewska, T. P. Stewart, Krzysztof Piotrzkowski, C. Youngman, Kr Long, Jose Repond, W. H. Smith, Y. Ning, K. Papageorgiu, Marcello Bindi, M. Borodin, B. Pawlik, Antonio Pellegrino, A. N. Barakbaev, A. Stern, P. Kulinski, J.H. Loizides, J. Malka, Andrea Contin, A. Galas, Marcella Capua, A. Salii, D. Nicholass, L. Wiggers, K. Wrona, B. Foster, S. Dusini, N. Bruemmer, J. Y. Kim, Pietro Antonioli, Luisa Cifarelli, L. K. Gladilin, R. K. Dementiev, O. Volynets, Masaki Ishitsuka, B. Loehr, P. Goettlicher, M. Basile, O. Tomalak, B. B. Levchenko, and R. Yoshida

Subjects
Quantum chromodynamics, Quark, Physics, Particle physics, Muon, Photon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, media_common.quotation_subject, Structure function, HERA, Deep inelastic scattering, 01 natural sciences, 7. Clean energy, 0103 physical sciences, Beauty, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), media_common
Abstract

Beauty production in deep inelastic scattering with events in which a muon and a jet are observed in the final state has been measured with the ZEUS detector at HERA using an integrated luminosity of 114 pb^-1. The fraction of events with beauty quarks in the data was determined using the distribution of the transverse momentum of the muon relative to the jet. The cross section for beauty production was measured in the kinematic range of photon virtuality, Q^2 > 2 Gev^2, and inelasticity, 0.05 < y < 0.7, with the requirement of a muon and a jet. Total and differential cross sections are presented and compared to QCD predictions. The beauty contribution to the structure function F_2 was extracted and is compared to theoretical predictions.

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80. A silicon strip detector telescope for the measurement of production and decay of charmed particles

Author

G. Waltermann, W. Männer, H.G.J.M. Tiecke, A. R. Gillman, U. Kötz, U. Stierlin, R. Klanner, C. Daum, R.S. Gilmore, H. J. Seebrunner, G. Polok, J. Malos, G. de Rijk, V. Chabaud, Fred Wickens, R. J. Tapper, T. Zeludziewicz, C.J.S. Damerell, S. Gill, E. Belau, C. Hardwick, M. Rozanska, Z. Hajduk, L. W. Wiggers, A. Wylie, W. Hoogland, A. Dwurazny, R. Bailey, K. Rybicki, T. Böhringer, J. Kemmer, E. Neugebauer, P. Weilhammer, G. Lutz, Hans Dijkstra, G. Lütjens, B.D. Hyams, L. Görlich, M. Turala, and Martine Bosman

Subjects
Physics, Nuclear and High Energy Physics, High energy, Silicon, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Detector, Hadron, chemistry.chemical_element, law.invention, Telescope, Nuclear physics, chemistry, law, Silicon detector, High Energy Physics::Experiment, Nuclear Experiment, Instrumentation, Image resolution
Abstract

A silicon detector telescope with 5 μm spatial resolution has been developed and successfully used to select charmed particles produced in high energy hadron collisions. A brief review of the properties and the performance of the system is given.

Published
1984

81. The real part of the elastic scattering amplitude in the Coulomb interference region of 4.2 GeV/c K− mesons on protons and a comparison with K+p scattering at 5 GeV/c

Author

T.H.J. Bellm, H.G.J.M. Tiecke, H. Voorthuis, P.M. Heinen, H. de Jonge, P. Vons, R. T. Van de Walle, A.G. Tenner, E. De Lijser, H. Winzeler, R. W. Meyer, and P. Manuel

Subjects
Physics, Elastic scattering, Nuclear physics, Nuclear and High Energy Physics, Amplitude, Meson, Scattering, Imaginary part, Coulomb, Atomic physics, Interference (wave propagation), Exponential function
Abstract

Using the same method as applied before to 5 GeV/ c K + p scattering we analyzed 4.2 GeV/ c K − p elastic scattering down to | t | values of 0.01 (GeV/ c ) 2 . About 5500 events yielded the following results: the ratio of real to imaginary part of the nuclear amplitude α = 0.20 ± 0.07, the slope of the exponential A = 8.6 ± 0.2 (GeV/ c ) −2 , the total elastic nuclear cross-section σ el = 4.3 ± 0.1 mb and the total cross-section σ T = 25.0 ± 0.7 mb.

Published
1970

82. Inclusive $\phi$ meson production, the parton fusion model and strange quark structure functions

Author

Martine Bosman, U. Stierlin, R. Klanner, U. Kötz, A. R. Gillman, H. Palka, B.D. Hyams, R. J. Tapper, Fred Wickens, A. Wylie, S. Gill, C.J.S. Damerell, S. Watts, R. Bailey, E. Belau, L. W. Wiggers, C. Hardwick, H.G.J.M. Tiecke, H. J. Seebrunner, M. Pepé, V. Chabaud, M. Turala, R.S. Gilmore, C. Daum, Hans Dijkstra, G. Lütjens, J. Malos, W. Hoogland, E. Neugebauer, G. Lutz, T. Zeludziewicz, G. Waltermann, W. Männer, Z. Hajduk, S. Kwan, G. de Rijk, J. Richardson, K. Rybicki, T. Böhringer, and P. Weilhammer

Subjects
Quark, Physics, Particle physics, Fusion, Strange quark, Valence (chemistry), Physics and Astronomy (miscellaneous), Meson, High Energy Physics::Phenomenology, Nuclear Theory, Structure function, Hadron, Parton, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

The parton fusion model is used to describe the longitudinal differential cross section (dσ/dxF) of hadronic ϕ production. Thedσ/dxF for ϕ production in π±p,\(\mathop p\limits^{( - )} p\) andK±p interactions is evaluated in the model by using structure functions for the constituents of the interacting particles. A comparison between the model and high statistics data in the Feynmanx range 0.0

Published
1986

83. Hadronic $\phi$ production and the Lund model for low p$_{T}$ interactions

Author

R. J. Tapper, M. Turala, B.D. Hyams, Hans Dijkstra, G. de Rijk, C.J.S. Damerell, H.G.J.M. Tiecke, P. Weilhammer, J. Richardson, S. Gill, U. Kötz, Fred Wickens, E. Belau, C. Hardwick, S. Watts, R. Bailey, G. Waltermann, K. Rybicki, A. Wylie, W. Männer, T. Böhringer, Martine Bosman, T. Zeludziewicz, L. W. Wiggers, Z. Hajduk, C. Daum, S. Kwan, J. Malos, E. Neugebauer, M. Pepé, G. Lutz, V. Chabaud, U. Stierlin, R. Klanner, A. R. Gillman, G. Lütjens, R.S. Gilmore, H. Palka, W. Hoogland, and H. J. Seebrunner

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Hadron, Elementary particle, Nuclear physics, Particle acceleration, Momentum, Field theory (psychology), Quantum field theory, Engineering (miscellaneous), Particle Physics - Experiment, Bar (unit)
Abstract

Experimental results on inclusive ϕ production are compared with the Lund model for lowp T hadronic interactions. The data is based on a sample of 600,000 ϕ mesons in the kinematic rangep T

Published
1986

84. Precise determination of the lifetime of the charmed baryon $\Lambda_{c}$

Author

C.J.S. Damerell, H. Dietl, J. Richardson, L. W. Wiggers, V. Castillo, V. Lüth, D. P. Kelsey, Z. Hajduk, V. Chabaud, H. Palka, T. Gooch, E. Higon, H. Becker, L. Görlich, K. Rybicki, C. Daum, M. Bosman, J. Malos, T. Böhringer, G. Waltermann, W. Männer, Fred Wickens, U. Stierlin, B. Lücking, H.G.J.M. Tiecke, S. Barlag, M. Pepé, R. Klanner, P. Weilhammer, T. Zeludziewicz, P. Gras, E. Neugebauer, G. Lutz, H. J. Seebrunner, Mariusz Witek, A. R. Gillman, R.S. Gilmore, G. Lütjens, S. Watts, and S. Kwan

Subjects
Physics, Nuclear physics, Baryon, Nuclear and High Energy Physics, Large Hadron Collider, Silicon microstrip detectors, Particle Physics - Experiment, Vertex (geometry)
Abstract

We present the final result on the measurement of the lifetime of the Λ c -baryon from a sample of Λ c -decays obtained in the NA32 experiment at the CERN SPS using silicon microstrip detectors and charge-coupled devices for vertex reconstruction. We observe a total of 160 Λ c in five different decay modes. A sample of 101 unambiguous decays of Λ c →pK − π + (and charge conjugate) above a background of 7 events is used for the Λ c mass and lifetime measurement. The mean Λ c lifetime is determined to be 1.96 −0.20 +0.23 ×10 −13 s and the Λ c mass to be 2285.8±0.6±1.2 MeV/ c 2 .

Published
1988

85. Ω- produced in K-p reactions at 4.2 GeV/c

Author

G.F. Wolters, J. Timmermans, S-O. Holmgren, W. M. Van Leeuwen, C. Dionisi, P. Grossmann, P. R. Lamb, J. L. Lloyd, J-C. Marin, B. Foster, R.J. Hemingway, E.W. Kittel, Jon-Paul R. Wells, R. Blokzijl, M. Banting, P.M. Heinen, M.J. Losty, L. Montanet, A.G. Tenner, J.C. Kluyver, M. Mazzucato, R. T. Van de Walle, Ph. Gavillet, R. Armenteros, A.J. de Groot, B. Jongejans, W. J. Metzger, H.G.J.M. Tiecke, G. G.G. Massaro, and Atul Gurtu

Subjects
Physics, Momentum, Nuclear and High Energy Physics, media_common.quotation_subject, Particle Data Group, Atomic physics, Asymmetry, media_common
Abstract

Forty Ω − events have been observed in a large (133 events/βb) experiment at 4.2 GeV/c incident K− momentum. Thirty nine of the events come from the three-body reaction K − p →Ω − K + K 0 . The Ω − is mainly produced in the forward hemisphere (direction of the incident K−). The lifetime is measured to be τ = (0.75 +0.14−0.11 × 10−10 sec substantially less than the Particle Data Group value of (1.3 −0.3+0.2) × 10−10 sec. The mass is determined to be 1671.7 ± 0.6 MeV, in good agreement with other determinations. The decay asymmetry parameter α (for the decay mode Ω − → Λ K − ) is found to be −0.2 ± 0.4.

Published
1978

86. Semileptonic decays of charmed $D^{\pm}$ meson: measurement of the lifetime and the cross-section

Author

C. Doum, L. W. Wiggers, H. J. Seebrunner, Fred Wickens, G. Waltermann, U. Stierlin, W. Männer, T. Gooch, S. Gill, Martine Bosman, S. Watts, G. de Rijk, R. Klanner, U. Kötz, T. Zeludziewicz, H.G.J.M. Tiecke, J. Kemmer, A. R. Gillman, B.D. Hyams, C.J.S. Damerell, J. Malos, E. Belau, K. Rybicki, M. Pepé, T. Böhringer, P. Weilhammer, A. Wylie, M. Turala, V. Chabaud, J. Richardson, Z. Hajduk, H. Palka, R. Bailey, S. Kwan, H. Becker, R.S. Gilmore, G. Lütjens, E. Neugebauer, G. Lutz, Hans Dijkstra, and C. Hardwick

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, Silicon, Spectrometer, chemistry.chemical_element, High resolution, Elementary particle, Vertex (geometry), law.invention, Telescope, chemistry, law, Quantum field theory, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Using the ACCMOR spectrometer equipped with a vertex telescope of high resolution silicon microstrip detectors 74 decays\(D^ + \to \bar K^{*0} (892)e^ + v_e \) (andcc.) withx F

Published
1987

87. An enhancement at the ΣK threshold (1680) MeV observed in K- p reactions at 4.2 GeV/c

Author

P. R. Lamb, H.G.J.M. Tiecke, C. Dionisi, J. Diaz, R.J. Hemingway, G. G.G. Massaro, W. J. Metzger, J. Schotanus, B. Foster, W.L. McDowell, M. Mazzucato, Ph. Gavillet, R. Armenteros, J.C. Kluyver, Atul Gurtu, and R. Blokzijl

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Negative charge, Mass spectrum, Channel analysis, Atomic physics, Interpretation (model theory)
Abstract

An enhancement in the (Σ K ) mass spectrum at threshold is observed in K−p interactions at 4.2 GeV/c. It appeats both in the neutral and negative charge states. Corresponding Λ K mass distributions show weak evidence for an effect close to this threshold (∼1680 MeV). Although the interpretation of the (Σ K ) enhancement by itself is ambiguous, a (Σ K )−(Λ K ) coupled channel analysis gives results compatible with its interpretation as a new Ξ∗.

Published
1978

88. High statistics inclusive $\phi$ meson production at SPS energies

Author

Z. Hajduk, A. Wylie, R.S. Gilmore, E. Belau, S. Kwan, C.J.S. Damerell, C. Daum, G. Waltermann, S. Watts, W. Männer, G. de Rijk, V. Chabaud, H. Palka, Martine Bosman, A. R. Gillman, T. Zeludziewicz, G. Lütjens, R. Bailey, U. Stierlin, J. Richardson, R. Klanner, J. Malos, C. Hardwick, H.G.J.M. Tiecke, B.D. Hyams, K. Rybicki, S. Gill, P. Weilhammer, T. Böhringer, R. J. Tapper, E. Neugebauer, W. Hoogland, G. Lutz, Hans Dijkstra, M. Turala, U. Kötz, Fred Wickens, L. W. Wiggers, M. Pepé, H. J. Seebrunner, and B Kisielewski

Subjects
Quark, Physics, Density matrix, Particle physics, Valence (chemistry), Physics and Astronomy (miscellaneous), Meson, Mass distribution, Nuclear Theory, High Energy Physics::Phenomenology, Elementary particle, Strangeness, Nuclear physics, High Energy Physics::Experiment, Quantum field theory, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Inclusive ϕ meson production has been measured for 100 GeV/c and 200 GeV/c incident π−,\(\bar p\) andK−, and for 120 GeV/c and 200 GeV/c incident π+,p andK+, using a Be target. A total of 630,000 ϕ mesons has been recorded in the kinematic range 0

Published
1986

89. D* production in deep inelastic scattering at HERA

Author

J.N. Lim, G. Howell, D. Sideris, L.K. Gladilin, G. Castellini, P. Borzemski, Rosario Nania, Sung Keun Park, F. Dal Corso, A.S. Wilson, W. Verkerke, L. Cifarelli, E. Rulikowska-Zarȩbska, D. B. Miller, H.-P. Jakob, R. L. Saunders, Tachishige Hirose, C. Glasman, M. Kuze, L. Lamberti, M. Basile, W.F. Badgett, A. Pellegrino, T. Haas, F. Anselmo, T. Dubbs, C. Rembser, Katsuo Tokushuku, Umberto Dosselli, K. Ohrenberg, T. Yamashita, H. Zhang, S. Dagan, R. Brugnera, V. A. Kuzmin, M. Khakzad, D. C. Bailey, M. Nakao, C. Youngman, Janusz Chwastowski, M. Inuzuka, N. A. McCubbin, J. F. Martin, A. Nigro, W. H. Smith, Yu. A. Golubkov, A. Bornheim, T. Matsushita, P. Giusti, Roberto Sacchi, S. Yamada, G.P. Heath, Gm Levman, D. S. Waters, R. Stroili, E. A. De Wolf, G. Drews, W. Hain, Y. Zamora Garcia, J. Bulmahn, T. Voß, M. Posocco, C. L. Kim, D.S. Bailey, B. Löhr, A.S. Proskuryakov, K. Yamauchi, H. Kowalski, J. R. Tickner, M. Lancaster, J.T. Wu, Danuta Kisielewska, T. Massam, A. Ochs, Aharon Levy, F.S. Chlebana, Peter Bussey, A.F. Whitfield, S. Mattingly, P. Cloth, M. Eckert, N.A. Korotkova, L. Bellagamba, S. Nam, Cristiana Peroni, R. J. Cashmore, A. Zichichi, Matthias Kasemann, R. Yoshida, R. Ayad, N. Pavel, B.D. Burow, D.G. Roff, R. Pawlak, J.I. Fleck, Michele Arneodo, P. Nylander, K. K. Joo, J.A. Parsons, H. Salehi, W.N. Cottingham, J. Zaja̧c, J. Hartmann, D. Notz, J. Shulman, Laurel E. Sinclair, B. Lu, G. Cara Romeo, O. Mańczak, P. Markun, M. Derrick, C. Voci, G. F. Hartner, Juan Terron, M. Kasprzak, I. Suzuki, R. Waugh, M. St-Laurent, William S. Lockman, U. Holm, R. Stanek, G. Briskin, P.M. Kooijman, T. W. Jones, J. M. Pawlak, C. M. Ginsburg, L. Suszycki, S. Kitamura, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, D.C. Williams, C. Coldewey, A. H. Walenta, T. Tymieniecka, U. Kötz, S. Ritz, A. Garfagnini, A. Caldwell, R. Cross, Z. Duliński, I.H. Park, N. Cartiglia, Giuseppe Levi, J. Gilmore, K. Muchorowski, N. Gendner, D. Kçira, Ian Brock, J.D. McFall, K. Jelen, Ricardo Graciani, J.K. Edmonds, A.I. van Sighem, J.T. Bromley, Krzysztof Piotrzkowski, F. Palmonari, Joanne Cole, P.F. Ermolov, W.R. Frisken, Richard Hall-Wilton, K. Wick, Marco Schioppa, S. Magill, N.C. Brummer, P. G. Pelfer, J. Breitweg, R. Wedemeyer, G. Cases, G. Abbiendi, S. Wölfle, Costas Foudas, L.W. Mo, Amedeo Staiano, Yuji Yamazaki, E. Strickland, Silvia Maselli, R. Loveless, M. Pfeiffer, Amanda Cooper-Sarkar, D. Acosta, M. Riveline, T. Fusayasu, D. Filges, R. J. Nowak, Luca Stanco, Lev Khein, T.P. Shah, Mark Sutton, S. M. Wang, D. H. Saxon, S. Sampson, R. S. Orr, J. Stamm, Vincenzo Monaco, B. Foster, F. Sciulli, A. Quadt, S.A. Zotkin, U. Schneekloth, P. Göttlicher, M.C.K. Mattingly, L. Lindemann, J. A. Zakrzewski, S. Kananov, J. K. Sedgbeer, C.R. Sampson, A. Kotański, G. Bruni, D. Horstmann, N. H. Brook, V. L. Harris, Kenneth Long, J. Labs, I. Butterworth, L. S. Durkin, L.A.T. Bauerdick, Y. Iga, R. Hamatsu, A. Pesci, Roberto Carlin, M. Rohde, J. Y. Kim, R.J. Tapper, Jeffrey T. Rahn, J.R. Okrasiński, Pietro Antonioli, Neville Harnew, G. Bari, J. Repond, O. Ruske, Ben Bylsma, J. Milewski, J. Puga, D.S. Hanna, M. Van Hook, B. Bednarek, H. Hartmann, D. Chapin, Thomas Trefzger, K.F. Johnson, A. Seiden, T. Doeker, Jose M Hernandez, K. Nagano, M. Roco, Giovanni Maccarrone, D. Hochman, R. Deffner, W. Liu, S. Schlenstedt, M. Brkic, M. Adamus, Sridhara Dasu, F. Zetsche, J.H. Vossebeld, M. Raso, A. Eskreys, A. T. Doyle, Ta Romanowski, R. Ullmann, V.A. Noyes, G. Marini, Ada Solano, J. Ciborowski, A. Kruse, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, S Campbell-Robson, Halina Abramowicz, L. Labarga, T. Monteiro, K. Coböken, F. Selonke, B. Surrow, Marcella Capua, S. Limentani, D. Hasell, O. Yu. Lukina, E. Hilger, G. D'Agostini, B. A. Dolgoshein, Jongmin Lee, F. Pelucchi, M. Dardo, I. T. Lim, James Crittenden, S. Bhadra, Jonathan Butterworth, T. Y. Ling, B.Y. Oh, Roman Walczak, A. Polini, U. Fricke, M. Grothe, C. A. Heusch, C. Amelung, S. De Pasquale, L. Heinz, E. Lohrmann, H.E. Blaikley, W. Schott, Cd Catterall, A. Meyer-Larsen, A. Bertolin, J.J. Engelen, Robert Klanner, A. Vaiciulis, Leszek Adamczyk, Anselmo Margotti, L.W. Wiggers, S. Polenz, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, Y. Eisenberg, D.J. Gilkinson, Guillaume Garcia, D.D. Reeder, J. P. Fernandez, M. Wodarczyk, I. A. Korzhavina, D. Westphal, H. Park, U. Karshon, K. Heinloth, Giuseppe Barbagli, Luis Hervas, J. Roldán, D. Boscherini, P. B. Kaziewicz, W.N. Murray, J.S.T. Ng, H. Uijterwaal, H.G.J.M. Tiecke, G. Sartorelli, M. Przybycien, J.B. Lane, Gy. Wolf, A.A. Savin, A. Contin, L.W. Hung, Lucia Votano, C. Nath, M. Zachara, R.C.E. Devenish, Q. Zhu, G. Laurenti, L. Iannotti, A. Prinias, Elisabetta Gallo, W. Koch, H. Beier, Tadeusz Kowalski, G. Poelz, Lutz Feld, S.H. An, M. Y. Pac, M. C. Petrucci, T. Tsurugai, P.B. Straub, L. M. Shcheglova, Giuseppe Iacobucci, M.A.J. Botje, I. Bohnet, Tomohiro Abe, Z. Jing, Ulf Behrens, Federico Cindolo, Miriam Lucio Martinez, S. B. Lee, T. Ishii, B. Musgrave, D.G. Stairs, K. Desler, Hartmut Sadrozinski, R.L. Talaga, S. Eisenhardt, J.J. Ryan, B. H. Y. Hung, J. K. Bienlein, Mariusz Przybycien, M. Corradi, C.H. Bokel, H.J. Grabosch, O. Deppe, M.E. Hayes, O. Schwarzer, Helen F Heath, U. Wollmer, I. Gialas, Marco Costa, D. Simmons, John Hart, M.I. Ferrero, D. Mikunas, R. G. Feild, D. Krakauer, A. Meyer, K. Umemori, A. Bruni, M. Löwe, Marcel Vreeswijk, Enrico Tassi, J. J. Whitmore, Giancarlo Susinno, Vladimir Bashkirov, F. Corriveau, G. Grzelak, T. C. Bacon, J. Del Peso, K. Homma, E. Barberis, C.-P. Fagerstroem, A. N. Solomin, U. Mallik, A.V. Shumilin, J. Große-Knetter, Fernando Barreiro, Martin Utley, Mauro Morandin, Z. Jakubowski, U. F. Katz, D. Piccioni, A.F. Ż.arnecki, D. Revel, E. Paul, A. Stifutkin, and Zeus (IHEF, IoP, FNWI)

Subjects
COLLISIONS, Nuclear and High Energy Physics, Particle physics, Proton, FOS: Physical sciences, PROTON, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, ZEUS CALORIMETER, High Energy Physics - Experiment (hep-ex), Positron, 0103 physical sciences, Charm (quantum number), QCD ANALYSIS, 010306 general physics, Nuclear Experiment, Physics, Quantum chromodynamics, ZEUS (particle detector), CONSTRUCTION, 010308 nuclear & particles physics, ZEUS, CENTRAL TRACKING DETECTOR, PARTON DISTRIBUTIONS, INTRINSIC CHARM, EP SCATTERING, ELECTROPRODUCTION, Structure function, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract

This paper presents measurements of D^{*\pm} production in deep inelastic scattering from collisions between 27.5 GeV positrons and 820 GeV protons. The data have been taken with the ZEUS detector at HERA. The decay channel $D^{*+}\to (D^0 \to K^- \pi^+) \pi^+ $ (+ c.c.) has been used in the study. The $e^+p$ cross section for inclusive D^{*\pm} production with $5, Comment: 17 pages including 4 figures

90. Measurement of elastic Υ photoproduction at HERA

Author

A. Bruni, F. Selonke, E. Hilger, R. Galea, L. M. Shcheglova, Enrico Tassi, J. J. Whitmore, F. Pelucchi, Michele Arneodo, Giancarlo Susinno, Giuseppe Iacobucci, A. Meyer, K. Umemori, G.J. McCance, P. Borzemski, H. Schnurbusch, B.Y. Oh, R.L. Talaga, S. W. Lee, Rosario Nania, Sung Keun Park, J.T. Wu, R. Loveless, Mariusz Przybycien, M. Corradi, W. S. Toothacker, C.H. Bokel, T. Fusayasu, A. Ochs, H.J. Grabosch, H. Zhang, J. F. Martin, C. Amelung, L. Suszycki, H.-P. Jakob, L. Lamberti, I. Bohnet, Jeffrey T. Rahn, Tomohiro Abe, A. Kotański, Antonino Zichichi, D. Epperson, J.I. Fleck, R. Graciani, L.A.T. Bauerdick, J. Zaja̧c, R. L. Saunders, V.A. Noyes, J. Del Peso, U. Wollmer, Z. Jing, J.R. Okrasiński, I. Gialas, C. A. Heusch, K. Coböken, Y. Zamora Garcia, Katsuo Tokushuku, B. Mellado, D. Simmons, Inkyu Park, Leszek Adamczyk, S. J. Hong, John Hart, N. Pavel, J.J. Ryan, Umberto Dosselli, R. Brugnera, Thomas Trefzger, K.F. Johnson, P. Cloth, S. Eisenhardt, Janusz Chwastowski, J.K. Edmonds, A.I. van Sighem, M. Y. Pac, K. Homma, E. Lohrmann, E. A. De Wolf, J. R. Tickner, Danuta Kisielewska, J. Ciborowski, M.I. Ferrero, Ada Solano, D. Mikunas, M.C.K. Mattingly, L. S. Durkin, R. Hamatsu, J. Puga, Els Koffeman, Lucia Votano, C. Nath, Yuji Yamazaki, V. A. Kuzmin, D. Krakauer, K. Nagano, W. H. Smith, G. Briskin, P.M. Kooijman, T. Massam, M.A.J. Botje, N. Cartiglia, W.N. Cottingham, Mário Costa, James Crittenden, H.G.J.M. Tiecke, S. Limentani, D. C. Bailey, C. Youngman, Dong-Chul Son, K. Wick, G. Abbiendi, R. Stanek, R. Deffner, Juan Terron, Vladimir Bashkirov, G.F. Hartner, M. Riveline, Anna Mastroberardino, I. O. Skillicorn, Fernando Barreiro, Andrea Contin, H.E. Blaikley, L.K. Gladilin, Mauro Morandin, M. Adamus, N. Tuning, M. C. Petrucci, F. Corriveau, R. Yoshida, I. T. Lim, M. Grothe, F. Sciulli, H.F. Heath, L. Heinz, M. Dardo, T. Tsurugai, B.D. Burow, G. Grzelak, G. Marini, S. Bhadra, T. Monteiro, J.A. Parsons, G. Cara Romeo, L. Lindemann, J. A. Zakrzewski, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, A. Quadt, M. E. Hayes, H. Lim, Y. Eisenberg, A. Sabetfakhri, C. Coldewey, Guillaume Garcia, H. Raach, Gm Levman, R. S. Orr, P.B. Straub, N. A. McCubbin, T. C. Bacon, D. S. Waters, U. Holm, R. Walczak, F. Palmonari, K. Heinloth, J. M. Pawlak, Jan Figiel, Marcella Capua, Kenneth Long, G. Bari, J. Repond, K. Desler, A. Polini, S. De Pasquale, S. Wölfle, R.J. Tapper, M. Milite, Giuseppe Barbagli, H. Wieber, J. Roldán, D.S. Hanna, T. Yamashita, M. St-Laurent, F. Dal Corso, H. Kowalski, Cristiana Peroni, R. J. Cashmore, B. Bednarek, Amedeo Staiano, U. F. Katz, A. Garfagnini, R. Wichmann, Abhay Deshpande, A. M. Cooper-Sarkar, S. Dagan, S. Mattingly, D. Piccioni, Matthias Kasemann, D.C. Williams, M. Khakzad, K. Klimek, K. Yamauchi, D.G. Roff, J. K. Bienlein, M. Pfeiffer, Ulf Behrens, Federico Cindolo, M. Derrick, T. Tymieniecka, F. Zetsche, Krzysztof Piotrzkowski, A.S. Proskuryakov, Yu. A. Golubkov, Giovanni Maccarrone, D. Hochman, Ta Romanowski, M. Wing, S. K. Dhawan, D. Filges, S. Schlenstedt, P. J. Bussey, R. Pawlak, W.F. Badgett, U. Kötz, P.R.B. Saull, J.B. Lane, Gy. Wolf, H. Salehi, G. Sartorelli, M. Przybycien, J.T. Bromley, D. Notz, G. Howell, M. Posocco, Joanne Cole, S. B. Lee, N. Gendner, C.-P. Fagerstroem, O. Deppe, J. Breitweg, Marco Schioppa, S. Magill, N.C. Brummer, Richard Hall-Wilton, B. Löhr, S. Stonjek, A.A. Savin, P. G. Pelfer, A. N. Solomin, U. Mallik, Jonathan Butterworth, R. Waugh, Aleksander Filip Żarnecki, Silvia Maselli, M. Inuzuka, S. Yamada, E. Rulikowska-Zarȩbska, S. Kitamura, R. J. Nowak, D. Acosta, T. Ishii, P. Nylander, K. K. Joo, U. Fricke, B. Musgrave, D.S. Bailey, B. Smalska, D.G. Stairs, D.D. Reeder, Roberto Carlin, P. Markun, D. Chapin, Vincenzo Monaco, Giuseppe Levi, N. H. Brook, M. Eckert, N.A. Korotkova, L. Bellagamba, M. Wodarczyk, J. Hartmann, A. Meyer-Larsen, Rodney Walker, O. Schwarzer, Z. Duliński, J.D. McFall, C. Voci, M. Rohde, A. Bertolin, R. Kerger, K. Jelen, O. Ruske, W.R. Frisken, T. W. Jones, G. L. Bashindzhagyan, C. M. Ginsburg, D. Sideris, S. Ritz, Costas Foudas, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, D. Hasell, G. D'Agostini, Tachishige Hirose, D. B. Miller, S. Sampson, A. Caldwell, R. Cross, T. Y. Ling, U. Schneekloth, W.B. Schmidke, A. Bornheim, M. Basile, J. Gilmore, I. Butterworth, A. Pellegrino, T. Haas, F. Anselmo, Robert Klanner, Y. Iga, V. W. Hughes, Alexander Kappes, A. Vaiciulis, T. Nishimura, Claudia Glasman, A. M. Czermak, E. Paul, J. M. Hernandez, T. Matsushita, G.P. Heath, A. Stifutkin, F. Goebel, H. F.W. Sadrozinski, Luca Stanco, Lev Khein, R. Stroili, N. Coppola, S. Kananov, J. K. Sedgbeer, O. Yu. Lukina, G. Bruni, B. Surrow, A. Nigro, Jongmin Lee, C. L. Kim, B. Foster, P.F. Ermolov, J. Y. Kim, Pietro Antonioli, Luisa Cifarelli, Neville Harnew, K. Hebbel, Cd Catterall, S.A. Zotkin, A. Pesci, Ben Bylsma, J. Milewski, M. Bukowy, H. Hartmann, W. Liu, Sridhara Dasu, S Campbell-Robson, Halina Abramowicz, E. A. Heaphy, A. Seiden, I. Suzuki, J.H. Vossebeld, M. Raso, A. Eskreys, A. T. Doyle, L. Labarga, Wouter Verkerke, B. A. Dolgoshein, Marta Ruspa, D. Kçira, Ian Brock, E. Strickland, T.P. Shah, Mark Sutton, S. M. Wang, D. H. Saxon, D. Westphal, U. Karshon, P. Göttlicher, Luis Hervas, D. Boscherini, M. I. Martínez, Roberto Sacchi, G. Castellini, W.N. Murray, M. Kuze, Aharon Levy, Laurel E. Sinclair, A. Prinias, Elisabetta Gallo, P. Giusti, W. Koch, S. Polenz, H. Beier, G. Drews, J. Große-Knetter, W. Hain, Tadeusz Kowalski, G. Poelz, J. P. Fernandez, I. A. Korzhavina, R.C.E. Devenish, Q. Zhu, S. W. Nam, N. Macdonald, J.J. Engelen, G. Laurenti, Anselmo Margotti, L.W. Wiggers, and L. Iannotti

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Meson production, Meson, 010308 nuclear & particles physics, Branching fraction, Nuclear Theory, Perturbative QCD, Particle accelerator, HERA, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

The photoproduction reaction γp → μ+ μ-p has been studied in ep interactions using the ZEUS detector at HERA. The data sample corresponds to an integrated luminosity of 43.2pb-1. The Υ meson has been observed in photoproduction for the first time. The sum of the products of the elastic Υ(1S), Υ(2S),Υ(3S) photoproduction cross sections with their respective branching ratios is determined to be 13.3 ± 6.0(stat.)-2.3+2.7(syst.) pb at a mean photon-proton centre of mass energy of 120 GeV. The cross section is above the prediction of a perturbative QCD model. © 1998 Elsevier Science B.V. All rights reserved.

91. Diffractive dijet cross sections in photoproduction at HERA

Author

Ada Solano, L. Lamberti, B. Surrow, Jongmin Lee, S. Limentani, Thomas Trefzger, K.F. Johnson, M. Kuze, S. Polenz, Vladimir Bashkirov, I. T. Lim, S. Bhadra, J. Bulmahn, P. Giusti, K. Hebbel, J. F. Martin, J. P. Fernandez, I. O. Skillicorn, Andrea Contin, A. Nigro, G. Drews, W. N. Murray, J. Große-Knetter, J. A. Parsons, C. L. Kim, W. Schott, Cd Catterall, W. Hain, Y. Zamora Garcia, A. Ochs, I. A. Korzhavina, T. Monteiro, H.-P. Jakob, R. L. Saunders, S. Sampson, R. Cross, G. Grzelak, T. C. Bacon, C.-P. Fagerstroem, A. N. Solomin, A. Prinias, Elisabetta Gallo, Costas Foudas, Marcella Capua, R. S. Orr, P. B. Straub, Kenneth Long, R. Yoshida, B.D. Burow, Francois Corriveau, Hartmut Sadrozinski, W. Koch, H.G.J.M. Tiecke, U. Mallik, Greg P Heath, Marco Schioppa, N.C. Brummer, J. Gilmore, R. Brugnera, F. Palmonari, A. Kotański, L.A.T. Bauerdick, S. De Pasquale, N. Coppola, B. A. Dolgoshein, G. Bari, J. M. Pawlak, S. W. Nam, N. Macdonald, Ulf Behrens, Federico Cindolo, S. Wölfle, Lucia Votano, C. Nath, O. Yu. Lukina, J.R. Okrasiński, Amedeo Staiano, J.J. Engelen, Z. Jing, D. Krakauer, M. Pfeiffer, P. G. Pelfer, H. Beier, Tadeusz Kowalski, S. A. Zotkin, A. Garfagnini, B. Bednarek, M. Inuzuka, S. Ritz, Amanda Cooper-Sarkar, D. C. Bailey, A. Sabetfakhri, C. Youngman, Jose Repond, A. Meyer, K. Umemori, Hao Zhang, D. Epperson, N. Cartiglia, D. S. Hanna, D. Filges, Yuji Yamazaki, Miriam Lucio Martinez, S. B. Lee, Anselmo Margotti, G. Poelz, A. Stifutkin, E. Rulikowska-Zarbska, J. D. McFall, L.W. Wiggers, Claudia Glasman, A. Quadt, F. Zetsche, W. S. Toothacker, R. Stanek, S. K. Dhawan, J.T. Wu, P.F. Ermolov, G. Howell, Giuseppe Levi, Gm Levman, Roberto Sacchi, M. Eckert, N.A. Korotkova, L. Bellagamba, D. Westphal, J. T. Rahn, U. Karshon, D Piccioni, S. Eisenhardt, J.B. Lane, W. H. Smith, Gy. Wolf, T. Ishii, D. S. Waters, Michele Arneodo, R. Kerger, K. Jelen, O. Ruske, Luis Hervas, D. Boscherini, Joanne Cole, B. Löhr, D. Mikunas, J.I. Fleck, L. Lindemann, J. Del Peso, J. A. Zakrzewski, L. M. Shcheglova, A. Bruni, Luca Stanco, Lev Khein, Mário Costa, H. Kowalski, Katsuo Tokushuku, R. J. Tapper, S. Kitamura, Aharon Levy, D. Hasell, Danuta Kisielewska, G. D'Agostini, R.C.E. Devenish, K. Homma, Alexander Kappes, W.R. Frisken, G. Castellini, J.S.T. Ng, S. Mattingly, L. Suszycki, G. Briskin, P.M. Kooijman, Umberto Dosselli, Q. Zhu, Jens Hartmann, Janusz Chwastowski, F. J. Sciulli, WN Cottingham, Giuseppe Iacobucci, J.K. Edmonds, A.I. van Sighem, Matthew Wing, K. Wick, Fernando Barreiro, Enrico Tassi, J. J. Whitmore, G. Abbiendi, D.D. Reeder, M. Wodarczyk, T. Y. Ling, Robert Klanner, A. Vaiciulis, U. Holm, S. Kananov, J. K. Sedgbeer, R. Pawlak, E. A. De Wolf, P. Nylander, K. K. Joo, J. R. Tickner, G. Laurenti, Y. Eisenberg, F. Dal Corso, Giancarlo Susinno, T. Massam, I. Gialas, G. Bruni, Laurel E. Sinclair, Mauro Morandin, M.A.J. Botje, Guillaume Garcia, L. W. Hung, M. Riveline, R. Walczak, U. Schneekloth, Jan Figiel, I. Bohnet, K. Heinloth, Tomohiro Abe, K. Coböken, Abhay Deshpande, P. Markun, G. F. Hartner, Roberto Carlin, W.F. Badgett, I. Butterworth, N. Tuning, K. Desler, Krzysztof Piotrzkowski, S. Magill, Giuseppe Barbagli, H. Wieber, J. Roldán, I.H. Park, A. Bornheim, Leszek Adamczyk, James Crittenden, Af Zarnecki, Y. Iga, A. Pesci, R. Wichmann, U. F. Katz, D. Chapin, R. Waugh, M. Y. Pac, A. Seiden, M.I. Ferrero, M. St-Laurent, Rodney Walker, O. Schwarzer, A. Meyer-Larsen, A. M. Czermak, Ben Bylsma, J. Milewski, G. Sartorelli, Ta Romanowski, M. Przybycien, B. Mellado, Z. Duliński, I. Suzuki, L. Iannotti, S. Yamada, A.A. Savin, D. S. Bailey, J.H. Vossebeld, M. Bukowy, M. Grothe, L. Heinz, A. Bertolin, M. C. Petrucci, K. Klimek, Giovanni Maccarrone, D. Hochman, J. Zajc, M. Raso, A. Eskreys, A. T. Doyle, S. Schlenstedt, P. J. Bussey, H. Hartmann, J. K. Bienlein, L. Labarga, T. Tsurugai, R. L. Talaga, S. Stonjek, J. F. de Trocóniz, Jonathan Butterworth, Jose M Hernandez, L. Zawiejski, Roberto Cirio, S. Dagan, C. Voci, Marta Ruspa, M. Khakzad, U. Fricke, W. Liu, V. A. Kuzinin, C. A. Heusch, C. M. Ginsburg, Yu. A. Golubkov, D. Kçira, B. Musgrave, Ian Brock, E. Lohrmann, M. Posocco, E. Paul, Sridhara Dasu, E. Strickland, Halina Abramowicz, T.P. Shah, Mark Sutton, L.K. Gladilin, S. M. Wang, D. H. Saxon, H.E. Blaikley, J. Ciborowski, R. Ullmann, T. Yamashita, P. Göttlicher, K. Yamauchi, M. Dardo, C. Coldewey, H. Raach, A. Polini, Matthias Kasemann, H. Salehi, P. Borzemski, D. Notz, M. Milite, W. Verkerke, T. W. Jones, Antonino Zichichi, G. L. Bashindzhagyan, W.B. Schmidke, R. J. Teuscher, J.J. Ryan, D.C. Williams, DG Roff, J. Stamm, B. Foster, D. Sideris, J. Y. Kim, Pietro Antonioli, D. B. Miller, Luisa Cifarelli, Neville Harnew, M. Basile, A. Pellegrino, T. Haas, F. Anselmo, V. W. Hughes, Richard Hall-Wilton, Silvia Maselli, J.T. Bromley, D. Horstmann, D. Acosta, N. H. Brook, Dg Stairs, Vincenzo Monaco, M. Rohde, R. Graciani, P. Cloth, R. Ayad, G. Cara Romeo, Tachishige Hirose, T. Matsushita, F. Goebel, R. Stroili, N. Pavel, Juan Terron, M. Kasprzak, R. Loveless, T. Fusayasu, Mariusz Przybycien, M. Corradi, C.H. Bokel, V.A. Noyes, S. J. Hong, S. Campbell-Robson, M. E. Hayes, N. A. McCubbin, H.J. Grabosch, A.S. Proskuryakov, Helen F Heath, U. Wollmer, D. Simmons, John Hart, M.C.K. Mattingly, L. S. Durkin, R. Hamatsu, J. Puga, Els Koffeman, K. Nagano, R. Deffner, M. Adamus, G. Marini, Wolfram Dietrich Zeuner, A.K. Wróblewski, A. Bamberger, Allen Caldwell, Cristiana Peroni, R. J. Cashmore, M. Derrick, T. Tymieniecka, U. Kötz, N. Gendner, O. Deppe, J. Breitweg, R. J. Nowak, F. Selonke, E. Hilger, R. Galea, F. Pelucchi, B.Y. Oh, C. Amelung, Rosario Nania, and Sung Keun Park

Subjects
Particle physics, Physics and Astronomy (miscellaneous), LUND MONTE-CARLO, Parton, 01 natural sciences, Zeus (malware), JET FRAGMENTATION, Nuclear physics, DEEP-INELASTIC SCATTERING, Pomeron, 0103 physical sciences, Rapidity, 010306 general physics, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, ZEUS, LARGE RAPIDITY GAP, POMERON STRUCTURE, PARTON DISTRIBUTIONS, PERTURBATION-THEORY, HARD SCATTERING, HERA, Deep inelastic scattering, Gluon, High Energy Physics::Experiment
Abstract

Differential dijet cross sections have been measured with the ZEUS detector for photoproduction events in which the hadronic final state containing the jets is separated with respect to the outgoing proton direction by a large rapidity gap. The cross section has been measured as a function of the fraction of the photon (ϰγOBS) and pomeron (βOBS) momentum participating in the production of the dijet system. The observed ϰγOBS dependence shows evidence for the presence of a resolved- as well as a direct-photon component. The measured cross section da/dβOBS increases as βOBS increases indicating that there is a sizeable contribution to dijet production from those events in which a large fraction of the pomeron momentum participates in the hard scattering. These cross sections and the ZEUS measurements of the diffractive structure function can be described by calculations based on parton densities in the pomeron which evolve according to the QCD evolution equations and include a substantial hard momentum component of gluons in the pomeron.

92. Erratum: Measurement of D*± production in deep inelastic scattering at HERA

Author

S. Fang, Sebastian Mergelmeyer, J. Ciborowski, A. Eskreys, I. Kadenko, J. Schwartz, Manjit Kaur, Ie. Korol, G. Grzelak, D. Notz, D.S. Zotkin, Alexander Spiridonov, I. A. Melzer-Pellmann, C. D. Catterall, Claire Gwenlan, F. Januschek, A. Polini, L. M. Shcheglova, S. De Pasquale, T. W. Jones, F. J. Sciulli, H.-P. Jakob, P. Göttlicher, Michele Arneodo, Yuji Yamazaki, Igor Katkov, J. Tomaszewska, Valentina Sola, R. Brugnera, L. Suszycki, Janna Katharina Behr, Zhongliang Ren, A. Trofymov, Kerstin Borras, W. Perlanski, G. F. Susinno, Dong-Chul Son, L. Stanco, R. Ingbir, A. M. Cooper-Sarkar, Yu. A. Golubkov, E. Paul, B. B. Levchenko, I. A. Korzhavina, Denys Lontkovskyi, J. Sztuk-Dambietz, A. Bruni, N. Okazaki, T. Namsoo, M. Jüngst, Ben Bylsma, D. Szuba, Rosario Nania, G. Hartner, I. M. Gregor, A. Raval, J. F. Martin, Danuta Kisielewska, T. P. Stewart, C. Youngman, Uta Klein, C. Blohm, D. Gladkov, Nazar Bartosik, Enrico Tassi, J. J. Whitmore, M. Vázquez, John Morris, G. Bari, J. Maeda, Giovanna Bruni, Hanno Perrey, N. Zakharchuk, H. Hartmann, G. D'Agostini, Guenter Wolf, F. Mohamad Idris, Giuseppe Barbagli, I. Makarenko, Y. Iga, Anna Mastroberardino, S. Schlenstedt, D.D. Reeder, P. Stopa, B. Brzozowska, I. O. Skillicorn, Philipp Roloff, Hartmut Stadie, Marcin Pawel Guzik, T. Y. Ling, Elisabetta Gallo, Yu. Onishchuk, B. Kahle, O. Gogota, Jan Figiel, Ramoona Shehzadi, E. Brownson, A. T. Doyle, Roberto Carlin, Ganna Dolinska, Ozan Arslan, R. Yoshida, R. Aggarwal, Halina Abramowicz, O. Yu. Lukina, B. Reisert, Robert Klanner, Leszek Adamczyk, B. A. Dolgoshein, Orel Gueta, A. Longhin, Katsuo Tokushuku, F. Dal Corso, A. Iudin, G. Grigorescu, Anselmo Margotti, Andrii Verbytskyi, A. Keramidas, Marta Ruspa, J. Grebenyuk, Y. Eisenberg, L.W. Wiggers, Janusz Chwastowski, A. Nigro, A. Bertolin, A.G. Robertson, Takuya Nobe, M. Kuze, P.F. Ermolov, R. Ciesielski, J. M. Pawlak, A. Galas, Aleksander Filip Żarnecki, Antonino Zichichi, Krzysztof Piotrzkowski, Iwona Grabowska-Bold, S. Fazio, Mariusz Przybycien, R. Walczak, Roberto Sacchi, K. Mujkic, F. Karstens, E. Lohrmann, R. Hori, A. Garfagnini, M. Corradi, O. Viazlo, Andrii Gizhko, A. Antonov, Tobias M. Haas, L. Zawiejski, W. Slominski, Kr Long, James Ferrando, U. Karshon, M. Turcato, Grzegorz Gach, C. Uribe-Estrada, Aharon Levy, D. Boscherini, Kunihiro Nagano, U. Samson, M. Wlasenko, H.G.J.M. Tiecke, V. Sosnovtsev, Y. D. Ri, R.C.E. Devenish, Mykhailo Lisovyi, Shinichi Shimizu, S. Magill, B. Musgrave, T. Schörner-Sadenius, A. E. Nuncio-Quiroz, I. Gialas, P. Kaur, W. A. T. Wan Abdullah, Marco Schioppa, S. Yamada, P. G. Pelfer, D. Bot, B.O. Zhautykov, Marco Costa, A. Stifutkin, G. Sartorelli, O. Turkot, Vladyslav Libov, Jose Repond, T. Kanno, K. Olkiewicz, Alexander Savin, John Hart, H. Wolfe, Ian Brock, V. Schönberg, J. Szuba, O. Zenaiev, Oleg Kuprash, I. Rubinsky, A. Hüttmann, W. H. Smith, N. Zhmak, Pawel Plucinski, M. Basile, D. H. Saxon, Y. Ning, I. Abt, W. Hain, S. Miglioranzi, Nazar Stefaniuk, E. Hilger, N. Brümmer, E.G. Boos, T. Tsurugai, R. Mankel, Wolfgang Lohmann, B.Y. Oh, Ulf Behrens, Federico Cindolo, H. Kowalski, N.S. Pokrovskiy, Zukhaimira Zolkapli, V. Trusov, O. Kononenko, A. Pellegrino, M.C.K. Mattingly, L. S. Durkin, R. Hamatsu, O. Bachynska, Els Koffeman, Peter Schleper, K. Wichmann, M. Adamus, G. Marini, Wolfram Dietrich Zeuner, A. Bamberger, Allen Caldwell, Zainol Abidin Ibrahim, M. Derrick, T. Tymieniecka, A. Parenti, U. Kötz, R. J. Nowak, Matthew Wing, V. Aushev, Sergei Chekanov, Dirk-Uwe Bartsch, A. Lee, L. Bellagamba, D. Hochman, P. J. Bussey, A.G. Yagües-Molina, J. Del Peso, Fernando Barreiro, Ada Solano, S.I. Suchkov, S. Limentani, Didar Dobur, I. Singh, Y. Aushev, Alessandro Montanari, M. I. Ferrero, N. Kovalchuk, Ewelina Lobodzinska, U. Schneekloth, N. Coppola, S. Kitamura, Francois Corriveau, W. B. Schmidke, A. Kotański, K. Papageorgiu, Marcello Bindi, B. Pawlik, A. N. Barakbaev, V. Bokhonov, Alexander Tapper, Vincenzo Monaco, A. Stern, P.M. Kooijman, Achim Geiser, Juan Terron, S. Antonelli, T. Theedt, O. Behnke, A.S. Proskuryakov, Tomasz Bold, S. Bhadra, J. Malka, Andrea Contin, Marcella Capua, N.N. Vlasov, Claudia Glasman, V. Drugakov, B. Löhr, Lev Khein, K. Wrona, B. Foster, S. Dusini, S. Kananov, J. Y. Kim, Pietro Antonioli, Luisa Cifarelli, L. K. Gladilin, R. K. Dementiev, N. Kondrashova, Masaki Ishitsuka, University of Warsaw, Faculty of Physics, Lódz University, and UCL - SST/IRMP - Institut de recherche en mathématique et physique

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, HERA, Deep inelastic scattering
Abstract

The ZEUS collaboration In the analysis for our paper on D* production, the beauty contribution was erroneously subtracted twice in the extraction of the reduced cross sections. This affected tables 9 and 10 as well as figures 9 and 10 that are reproduced here in a corrected version. The kinematical acceptances shown in the last colum of table 10 have been also corrected since they were calculated with a different value for the charm fragmentation fraction than what was used in the rest of the analysis and reported in the text. A misprint was found in table 7: the value in the third column at four rows from the bottom should read 49.8, not 59.8. Finally, one of the authors was missing from the author list: C. Uribe-Estrada (Department of Physics, University of Oxford, United Kingdom). Article funded by SCOAP3

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93. Study of D* (2010)± production in ep collisions at HERA

Author

A. Nigro, Yasunori Yamazaki, J. Kochocki, B. Gutjahr, H. Hultschig, John Hart, L. M. Shcheglova, A. Prinias, D. Haun, E. Barberis, A. N. Solomin, U. Mallik, R. R. McNeil, K. Desler, M. Lancaster, W. Koch, F. Selonke, E. Hilger, A.F. Whitfield, S.M. Mari, J.T. Wu, K. Charchuła, Giuseppe Iacobucci, M. Krzyżanowski, W. Metcalf, H. Beier, Tadeusz Kowalski, J. Große-Knetter, A. Bruni, D. Daniels, U. Holm, B.Y. Oh, M. Löwe, Y Zhang, D.D. Reeder, B. Diekmann, M. Wodarczyk, G. Poelz, J. Mollen, J. Zaja̧c, P. B. Kaziewicz, L. Köpke, L. Lamberti, H. Uijterwaal, Lutz Feld, J. J. Whitmore, C. Li, Rosario Nania, Sung Keun Park, Nicolo Cartiglia, N. Pavel, I. Suzuki, G.R. Smith, Krzysztof Piotrzkowski, P. Bruni, Costas Foudas, J.F. Zhou, Christian Nemoz, Giancarlo Susinno, Vladimir Bashkirov, L.W. Mo, K. K. Joo, Y. Iga, Cristiana Peroni, N. Dyce, A. Meyer, G. Briskin, Mariusz Przybycien, M. Corradi, Tobias M. Haas, William S. Lockman, G. Grzelak, Matthias Kasemann, K. M. Furutani, D. Westphal, D. Notz, R. J. Cashmore, S. Nickel, M. Derrick, D. B. Miller, C. Voci, B. Surrow, S.H. An, T. Tymieniecka, M. Zachara, S. Mengel, J. Mainusch, D. Schramm, C. A. Heusch, Ada Solano, R. S. Orr, R.S. Gilmore, H.J. Grabosch, S. H. Yon, T. W. Jones, Anna Goussiou, G. L. Bashindzhagyan, N. P. Zotov, W.B. Schmidke, R. J. Teuscher, Shoichi Yamada, R.C.E. Devenish, Avto Kharchilava, W. Schott, Cd Catterall, T. C. Bacon, U. Kötz, A. Dannemann, H.G.J.M. Tiecke, F. Benard, O. Mańczak, G. F. Hartner, Roberto Carlin, Q. Zhu, I. Fleck, U. Karshon, J.B. Lane, Gy. Wolf, Rr Rau, J.A. O'Mara, Marcel Vreeswijk, S. Limentani, Kenneth Long, K. Wick, S. De Pasquale, Luis Hervas, S. Ritz, D. Boscherini, Marco Schioppa, S. Magill, J. Gajewski, B. Behrens, O. Deppe, T. Doeker, A. Caldwell, M. Roco, J.D. McFall, V. K. Nadendla, R. J. Nowak, G. Bari, G. Laurenti, J. Del Peso, P. G. Pelfer, J. Repond, Masashi Hazumi, G. Castellini, R.L. Talaga, T. Tsurugai, K. Ohrenberg, M. Van Hook, L.E. Sinclair, S.S. Wilson, P. Luffman, A. Frey, A. Bertolin, B. Bednarek, P.F. Ermolov, C. Rembser, J. Bulmahn, K.W. McLean, P.B. Straub, H. Zhang, H.-P. Jakob, A. Ladage, S. Söldner-Rembold, K. Homma, Samuel Silverstein, R. L. Saunders, J. F. Martin, M.B. Crombie, R. Seidlein, E. Lohrmann, J.S.T. Ng, M. Basile, W. H. Smith, P. Giusti, M. Brkic, E. Badura, D. Zer-Zion, J. F. de Trocóniz, L. Zawiejski, Roberto Cirio, A. Byrne, Fernando Barreiro, Robert Stanek, A. Mass, N. Wulff, P. Joos, J. Stamm, F. Zetsche, E. Stiliaris, K. Eskreys, I. Gialas, M.C.K. Mattingly, L. S. Durkin, R. Yoshida, L. Wai, J. Schroeder, R. Brugnera, R. Hamatsu, J. Puga, N. A. McCubbin, V. A. Kuzmin, D. C. Bailey, Cg Matthews, Luca Stanco, Mário Costa, D. Hasell, G. Zacek, Mauro Morandin, G. D'Agostini, M. Z. Wang, B. Foster, S. Bhadra, J. K. Sedgbeer, R. Imlay, L. W. Hung, T. Y. Ling, T. Yip, Jens Hartmann, L. Iannotti, M. De Giorgi, C. Youngman, Y. Zamora Garcia, V. D. Kobrin, T. Dubbs, Y. Nakamitsu, Katsuo Tokushuku, T.P. Shah, S. M. Wang, Ulf Behrens, F.S. Chlebana, Federico Cindolo, W. Bogusz, S. Eisenhardt, W. Hain, L. Lindemann, G. Bruni, Simon George, Umberto Dosselli, R. J. Seifert, Giovanni Abbiendi, I. H. Park, Tachishige Hirose, D. H. Saxon, T. Voß, A. Bargende, J. M. Pawlak, G.A. Blair, Leszek Adamczyk, M.I. Ferrero, M. Adamus, G. Marini, A.K. Wróblewski, A. Bamberger, Masami Chiba, D. Mikunas, Janusz Chwastowski, Klaus Kurt Desch, Luisa Cifarelli, A. M. Cooper-Sarkar, L. K. Gladilin, Neville Harnew, S. Dagan, W. Schulz, Robert Klanner, A. Vaiciulis, E. Tassi, Gm Levman, Djp Norman, I. Ali, Ben Bylsma, J. Milewski, A. Quadt, E. A. De Wolf, J. Biltzinger, H. Hartmann, D. S. Bailey, M. Khakzad, M. L. Cardy, P. Göttlicher, K. Honscheid, Yu. A. Golubkov, Y. Eisenberg, M.A.J. Botje, R. G. Feild, D. Krakauer, K. Yamauchi, H. Kowalski, M. Eckert, L. Bellagamba, M. St.Laurent, E. Paul, D.J. Gilkinson, M. Kuze, F. Dal Corso, S. Kartik, E. Rulikowska-Zarȩbska, Douglas Gingrich, Francois Corriveau, R. Walczak, H. F.W. Sadrozinski, Ricardo Graciani, K. Heinloth, Giuseppe Barbagli, L. Hagge, F. Sciulli, D. Revel, T. Hasegawa, J. Roldán, Roberto Sacchi, A. Leich, C. Glasman, B. Hubbard, C. P. Fagerstroem, F. Palmonari, A. Stifutkin, Sridhara Dasu, S. Mine, S Campbell-Robson, Halina Abramowicz, A.S. Proskuryakov, Giuseppe Levi, K. Muchorowski, W.F. Badgett, K. Jelen, T. Ishii, A. Kotański, L.A.T. Bauerdick, T.L. Short, R.J. Tapper, Amedeo Staiano, U. F. Katz, A. Freidhof, B. Lu, M. Posocco, W.R. Frisken, G. Sartorelli, Aharon Levy, T.J. Llewellyn, J. N. Lim, J. M. Hernandez, Debades Bandyopadhyay, J. K. Bienlein, R. van Woudenberg, G.P. Heath, M. de Kamps, B. Musgrave, D. Filges, R. Sinkus, S. W. Nam, R. Stroili, Antonino Zichichi, A. Bernstein, J.J. Engelen, P.M. Kooijman, U. Schneekloth, H. J. Kim, R. Wedemeyer, Giovanni Maccarrone, Thomas Trefzger, S. Schlenstedt, P. J. Bussey, A. Cassidy, I. Butterworth, M. Nakahata, D. S. Hanna, M. L. Utley, S. M. Hong, E. Gallo, Andrea Contin, James Crittenden, S. Yang, A. Kruse, Anselmo Margotti, P. Cloth, L.W. Wiggers, K. Prytz, Danuta Kisielewska, Ta Romanowski, T. Massam, E. McCliment, Y. Nagasawa, R. Ayad, H.F. Heath, G. Cases, T. Neumann, B. Löhr, A. Seiden, F. F. Wilson, J. A. Zakrzewski, M. Grothe, C.J.S. Morgado, Michele Arneodo, S. Kitamura, J. Ciborowski, M. Chiarini, J.A. Parsons, R. Ullmann, J. Shulman, Juan Terron, M. Kasprzak, Jonathan Butterworth, G. Cara Romeo, C. Fordham, A. Eskreys, Lucia Votano, A. T. Doyle, L. Labarga, Wouter Verkerke, C. Nath, H. Heßling, G. Geitz, B. Y. H. Hung, A. A. Savin, B. D. Burow, W.N. Murray, G. Anzivino, M. Nakao, P. Borzemski, G. Drews, G. Zech, M. Flasiński, R. Schattevoy, A.S. Wilson, M. Dardo, C. Coldewey, L. Suszycki, A. H. Walenta, B. A. Dolgoshein, P. Morawitz, Aleksander Filip Żarnecki, Silvia Maselli, D. Lüke, A. Polini, D. Acosta, Dg Stairs, D. Horstmann, R. Timellini, A. Dake, N. H. Brook, V. L. Harris, M. Rohde, R. Loveless, J. Labs, M. H. Suh, M. Geerts, K. Blankenship, C.R. Sampson, Jeffrey T. Rahn, P. M. Patel, V.A. Noyes, and Zeus (IHEF, IoP, FNWI)

Subjects
Nuclear and High Energy Physics, Particle physics, Meson, Proton, LUND MONTE-CARLO, photoproduction, charmed meson production, FOS: Physical sciences, 01 natural sciences, Zeus (malware), JET FRAGMENTATION, Charm quark, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), CHARM PHOTOPRODUCTION, GAMMA-P INTERACTIONS, 0103 physical sciences, Charm (quantum number), 010306 general physics, Quantum chromodynamics, Physics, ZEUS, LEADING-ORDER QCD, PARTON DISTRIBUTIONS, CROSS-SECTION, HARD SCATTERING, HEAVY QUARKS, E+E-PHYSICS, 010308 nuclear & particles physics, HERA, Gluon
Abstract

We report the first observation of charmed mesons with the ZEUS detector at HERA using the decay channel ${\rm D}^{*+}\rightarrow (\Do \rightarrow {\rm K}^-\pi^+)\pi^+$ (+ c.c.). Clear signals in the mass difference $\Delta M$=$M$(D$^*$)--$M$(D$^0)$ as well as in the $M(K\pi)$ distribution at the D$^0$ mass are found. The $ep$ cross section for inclusive \DSpm\ production with $Q^2, Comment: 19 pages, latex, 3 figures appended as uuencoded file

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