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13 results on '"FINAL STATE: P"'

1. Results on two-body decays of the (3100)-resonance

Author

Criegee, L., Dehne, H. C., Waloschek, P., Winter, G. G., Wolff, S., Zimmermann, W., Fox, J., Franke, G., Horlitz, G., Knies, G., Lohrmann, E., Schmitz, R., Ranga Swamy, T. N., and Timm, U.

Subjects
WEAK INTERACTION [MODEL], DECAY MODES [J/PSI(3100)], FINAL STATE [P], ANTI-P [FINAL STATE], +P+ANTI-P+P%22">J/PSI(3100) --> P ANTI-P P, J/PSI(3100) [DECAY MODES], J/PSI(3100): ELECTROPRODUCTION, ELECTROPRODUCTION [J/PSI(3100)], P: FINAL STATE, MAGNETIC FIELD, FINAL STATE: ANTI-P, MUON+ [FINAL STATE], DECAY [BACKSCATTER], ANTI-P: FINAL STATE, PROPORTIONAL CHAMBER: EXPERIMENTAL RESULTS, BACKSCATTER: DECAY, +MUON%2B+MUON%22">J/PSI(3100) --> MUON+ MUON, BACKSCATTER [DECAY], EXPERIMENTAL RESULTS: PROPORTIONAL CHAMBER, FINAL STATE [MUON+], COLLIDING BEAMS: ELECTRON POSITRON, FINAL STATE [MUON-], MODEL: WEAK INTERACTION, P [FINAL STATE], DESY DORIS STOR, DECAY MODES: J/PSI(3100), FINAL STATE: MUON, FINAL STATE: MUON+, COLLIDING BEAMS [ELECTRON POSITRON], MUON-: FINAL STATE, FOUR-PI-DETECTOR, ELECTROPRODUCTION: J/PSI(3100), ELECTRON POSITRON [COLLIDING BEAMS], DECAY: FORWARD SCATTERING, ELECTRON POSITRON: COLLIDING BEAMS, PROPORTIONAL CHAMBER [EXPERIMENTAL RESULTS], J/PSI(3100): DECAY MODES, MUON+: FINAL STATE, FINAL STATE: P, MUON- [FINAL STATE], DECAY: BACKSCATTER, J/PSI(3100) [ELECTROPRODUCTION], FINAL STATE [ANTI-P], FORWARD SCATTERING [DECAY], EXPERIMENTAL RESULTS [PROPORTIONAL CHAMBER]
Abstract

10 pp. (1975).

Published
1975
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2. Measurement of the real part of the virtual compton amplitude and of the invariant mass yield of the photoproduced $e^+ e^-$ pairs in the mass range 1500-MeV < m < 2000-MeV

Author

Bartalucci, S., Bertolucci, S., Bienlein, J. K., Fiori, M., Giromini, P., Laudan, R., Metz, E., Rippich, C., and Sermoneta, A.

Subjects
VECTOR MESON(1380) [POSTULATED PARTICLE], VECTOR MESON(1700) [WIDTH], ELECTRON [FINAL STATE], POSTULATED PARTICLE: VECTOR MESON(1550), FINAL STATE [P], DIFFERENTIAL CROSS SECTION, VECTOR MESON [FINAL STATE], VECTOR MESON(1700) [MASS], POSTULATED PARTICLE: VECTOR MESON(1380), P: FINAL STATE, POSTULATED PARTICLE: VECTOR MESON(1700), WIDTH: VECTOR MESON(1700), SCATTERING AMPLITUDE: COMPTON SCATTERING, FINAL STATE: VECTOR MESON, VECTOR MESON(1700) [POSTULATED PARTICLE], VECTOR MESON: FINAL STATE, PHOTON P: INTERACTION, 7.2 GEV: 1.1-2.1 GEV-CM, INTERACTION [PHOTON P], FINAL STATE: POSITRON, MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, +P+VECTOR+MESON%28POSITRON+ELECTRON%29%22">PHOTON P --> P VECTOR MESON(POSITRON ELECTRON), MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], ELECTRON: FINAL STATE, P [FINAL STATE], VECTOR MESON(1700) [PHOTOPRODUCTION], FINAL STATE [ELECTRON], VECTOR MESON(1550) [POSTULATED PARTICLE], INTERACTION: PHOTON P, FINAL STATE [VECTOR MESON], SCATTERING AMPLITUDE [COMPTON SCATTERING], 1.1-2.1 GEV-CM [7.2 GEV], COMPTON SCATTERING [SCATTERING AMPLITUDE], POSITRON: FINAL STATE, POSITRON [FINAL STATE], PHOTOPRODUCTION: VECTOR MESON(1700), DESY ES, FINAL STATE: ELECTRON, RHO'(1600), MASS: VECTOR MESON(1700), FINAL STATE: P, PHOTON P [INTERACTION], COMPTON SCATTERING: SCATTERING AMPLITUDE, FINAL STATE [POSITRON], EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER]
Abstract

9 pp. (1977).

Published
1977
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3. Separation of $\sigma_L$ and $\sigma_T$ in eta-electroproduction at the Resonance $S_{11}$ (1535)

Author

Brasse, F. W., Flauger, W., Gayler, Joerg, Gerhardt, V., Goel, S. P., Gossling, C., Haidan, R., Merkwitz, M., Pock, D., and Wriedt, H.

Subjects
ELECTRON [FINAL STATE], FINAL STATE [P], +P+ETA%28549%29+ELECTRON%22">ELECTRON P --> P ETA(549) ELECTRON, P: FINAL STATE, ELECTROPRODUCTION [ETA(549)], HIGH [TRANSVERSE MOMENTUM], ETA(549) [ELECTROPRODUCTION], TRANSVERSE [CHANNEL CROSS SECTION], MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, LONGITUDINAL [CHANNEL CROSS SECTION], ddc:530, ELECTRON P [INTERACTION], INTERACTION: ELECTRON P, HIGH [MOMENTUM TRANSFER], MOMENTUM TRANSFER: HIGH, 1.54 GEV-CM, ELECTRON: FINAL STATE, MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], P [FINAL STATE], CHANNEL CROSS SECTION: LONGITUDINAL, CHANNEL CROSS SECTION: TRANSVERSE, FINAL STATE [ELECTRON], INTERACTION [ELECTRON P], TRANSVERSE MOMENTUM: HIGH, 1.5 GEV: 0.6: 1.0 GEV-SQUARED, DESY ES, FINAL STATE: ELECTRON, ELECTROPRODUCTION: ETA(549), N'(1535), FINAL STATE: P, 0.6: 1.0 GEV-SQUARED [1.5 GEV], ELECTRON P: INTERACTION, EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, ETA(549): ELECTROPRODUCTION, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER]
Abstract

(1978). doi:10.1016/0550-3213(78)90177-3, The ratio R = σ L σ T of longitudinal and transverse cross sections for the reaction ep → ep η at the resonance S 11 (1535) was measured at momentum transfers q 2 = 0.6 and 1 GeV 2 . The transverse part dominates the longitudinal part of the cross-section. Averaging from W = 1.49 GeV to W = 1.58 GeV we obtain R = 0.22±0.23 at q 2 = 0.6 GeV 2 and R = −0.16 ± 0.16 at q 2 = 1 GeV 2 .

Published
1977
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4. Measurement of the photoproduction phases of the $\rho$, $\omega$, and $\phi$ mesons

Author

Bartalucci, S., Bertolucci, S., Bienlein, J. K., Fiori, M., Giromini, P., Laudan, R., Metz, E., Rippich, C., and Sermoneta, A.

Subjects
ELECTRON [FINAL STATE], 3.0-7.2 GEV [2.7 GEV BREMSSTRAHLUNG], PHOTOPRODUCTION: AMPLITUDE ANALYSIS, FINAL STATE [P], 2.7 GEV BREMSSTRAHLUNG: 3.0-7.2 GEV, PHOTOPRODUCTION: RHO(765)0, P: FINAL STATE, DIFFERENTIAL CROSS SECTION: ENERGY DEPENDENCE, +P+POSITRON+ELECTRON%22">PHOTON P --> P POSITRON ELECTRON, PHI(1019) [PHOTOPRODUCTION], PHOTOPRODUCTION [RHO(765)0], RHO(765)0: PHOTOPRODUCTION, PHOTON P: INTERACTION, FINAL STATE: POSITRON, 0.5-1.06 GEV-CM: 6: 7.2 GEV, INTERACTION [PHOTON P], MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, ddc:530, WIDE-ANGLE [PHOTOPRODUCTION], PHOTOPRODUCTION [PHI(1019)], MASS SPECTRUM: (POSITRON ELECTRON), ELECTRON: FINAL STATE, MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], P [FINAL STATE], FINAL STATE [ELECTRON], PHOTOPRODUCTION [OMEGA(784)], AMPLITUDE ANALYSIS [PHOTOPRODUCTION], INTERACTION: PHOTON P, PHOTOPRODUCTION: WIDE-ANGLE, 6: 7.2 GEV [0.5-1.06 GEV-CM], POSITRON: FINAL STATE, PHOTOPRODUCTION: PHI(1019), POSITRON [FINAL STATE], DESY ES, FINAL STATE: ELECTRON, RHO(765)0 [PHOTOPRODUCTION], ENERGY DEPENDENCE [DIFFERENTIAL CROSS SECTION], OMEGA(784): PHOTOPRODUCTION, FINAL STATE: P, PHOTOPRODUCTION: OMEGA(784), PHOTON P [INTERACTION], OMEGA(784) [PHOTOPRODUCTION], FINAL STATE [POSITRON], PHI(1019): PHOTOPRODUCTION, EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, (POSITRON ELECTRON) [MASS SPECTRUM], EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER]
Abstract

(1978). doi:10.1007/BF02896342, We measured 30 000 wide-angle electron-positron pairs from the reaction γ+p→p+e++e− in the invariant-mass region 500≤m≤1060 MeV. The photoproduction amplitudes of the ρ, ω and ϕ mesons were measured to deviate from being pure imaginary by 37.5°−3.1°+2.8°, 29.6°−12.9°+15.5°, 3.4°−4.2°+5.3°,respectively.

Published
1978
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5. Electromagnetic interactions

Author

Ting, S. C. C

Subjects
SCATTERING: DELBRUECK, +ELECTRON+POSITRON+2PHOTON%22">ELECTRON POSITRON --> ELECTRON POSITRON 2PHOTON, ELECTRON [FINAL STATE], +MUON%2B+MUON%22">ELECTRON POSITRON --> MUON+ MUON, VECTOR MESON [FINAL STATE], PHOTON ELECTRON: INTERACTION, FINAL STATE [PHOTON], PHOTON VECTOR MESON: INTERACTION, MUON+ [FINAL STATE], +P+VECTOR+MESON%22">PHOTON P --> P VECTOR MESON, FINAL STATE [PI0], +2PI%2B+2PI%22">ELECTRON POSITRON --> 2PI+ 2PI, +PI0+ANYTHING%22">PHOTON P --> PI0 ANYTHING, PHOTON P: INTERACTION, FINAL STATE: POSITRON, FINAL STATE [PI+], FINAL STATE [MUON+], P [FINAL STATE], FINAL STATE [ELECTRON], +P+ELECTRON+POSITRON%22">PHOTON P --> P ELECTRON POSITRON, INTERACTION [PHOTON VECTOR MESON], PI0 [FINAL STATE], PI+ [FINAL STATE], POSITRON: FINAL STATE, MUON-: FINAL STATE, DELBRUECK [SCATTERING], ANNIHILATION: ELECTRON POSITRON, POSITRON [FINAL STATE], FINAL STATE: ELECTRON, ELECTRON POSITRON [ELASTIC SCATTERING], ELECTRON POSITRON [ANNIHILATION], ELASTIC SCATTERING: ELECTRON POSITRON, ELASTIC SCATTERING [ELECTRON POSITRON], PHOTON ELECTRON [INTERACTION], ANNIHILATION [ELECTRON POSITRON], MUON+: FINAL STATE, FINAL STATE: P, ELECTROMAGNETIC INTERACTION, PI+: FINAL STATE, PI0: FINAL STATE, PHOTOPRODUCTION, MUON- [FINAL STATE], PHOTON MUON: INTERACTION, INTERACTION: PHOTON MUON, PI-: FINAL STATE, INTERACTION: PHOTON VECTOR MESON, AMPLITUDE ANALYSIS, FINAL STATE: PI, FINAL STATE: PI0, PHOTON [FINAL STATE], FINAL STATE [P], VECTOR DOMINANCE [MODEL], DIFFERENTIAL CROSS SECTION, INTERACTION [PHOTON MUON], QUANTUM ELECTRODYNAMICS, P: FINAL STATE, ELECTRON POSITRON: ELASTIC SCATTERING, FINAL STATE: VECTOR MESON, FINAL STATE [PI-], VECTOR MESON: FINAL STATE, INTERACTION [PHOTON P], PHOTON: FINAL STATE, FINAL STATE [MUON-], FINAL STATE: PI+, MULTIPLE PRODUCTION, PHOTON MUON [INTERACTION], ELECTRON: FINAL STATE, INTERACTION [PHOTON ELECTRON], FINAL STATE: PHOTON, FINAL STATE: MUON, FINAL STATE: MUON+, ELECTROPRODUCTION, INTERACTION: PHOTON P, FINAL STATE [VECTOR MESON], PHOTON VECTOR MESON [INTERACTION], TOTAL CROSS SECTION, PHOTON P [INTERACTION], MODEL: VECTOR DOMINANCE, FINAL STATE [POSITRON], PI- [FINAL STATE], INTERACTION: PHOTON ELECTRON, SCALING, ELECTRON POSITRON: ANNIHILATION
Abstract

47 pp. (1975).

Published
1975
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6. Bestimmung des Beitrages longitudinal polarisierter virtueller Photonen bei der $eta$-Elektroproduktion der $S_{11}$(1535)-Resonanz

Author

Wriedt, Henning

Subjects
ELECTRON [FINAL STATE], TRANSVERSE [POLARIZATION], TOTAL CROSS SECTION [POLARIZATION], POLARIZATION [TOTAL CROSS SECTION], BIBLIOGRAPHY, POLARIZATION [PHOTON], 0.6-1.0 (GEV/C)-SQUARED (MOMENTUM TRANSFER), ELECTROPRODUCTION [ETA(549)], ELECTROPRODUCTION [N(1535)], ANGULAR DEPENDENCE [DIFFERENTIAL CROSS SECTION], THESIS, ETA(549) [ELECTROPRODUCTION], ELECTRON P [INTERACTION], INTERFERENCE: N(1470) N(1535), POLARIZATION [DIFFERENTIAL CROSS SECTION], +N%281535%29%28P+ETA%28549%29%29+ELECTRON%22">ELECTRON P --> N(1535)(P ETA(549)) ELECTRON, ENERGY DEPENDENCE [TOTAL CROSS SECTION], TOTAL CROSS SECTION: ENERGY DEPENDENCE, P [FINAL STATE], DIFFERENTIAL CROSS SECTION: TABLES, FINAL STATE [ELECTRON], INTERACTION [ELECTRON P], POLARIZATION: TOTAL CROSS SECTION, DESY ES, FINAL STATE: ELECTRON, DIFFERENTIAL CROSS SECTION: POLARIZATION, TABLES [DIFFERENTIAL CROSS SECTION], RATIO [TOTAL CROSS SECTION], FINAL STATE: P, MULTIPOLE [PARTIAL-WAVE ANALYSIS], electroproduction [eta], ELECTRON P: INTERACTION, PARTIAL-WAVE ANALYSIS: MULTIPOLE, ETA(549): ELECTROPRODUCTION, POLARIZATION: LONGITUDINAL, eta: electroproduction, FINAL STATE [P], ELECTROPRODUCTION: N(1535), POLARIZATION: TRANSVERSE, TOTAL CROSS SECTION: POLARIZATION, DIFFERENTIAL CROSS SECTION [POLARIZATION], P: FINAL STATE, N(1535) [ELECTROPRODUCTION], N(1535): ELECTROPRODUCTION, LONGITUDINAL [POLARIZATION], MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, mass spectrum: missing-mass, INTERACTION: ELECTRON P, TOTAL CROSS SECTION: RATIO, EXPERIMENTAL EQUIPMENT, MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], ELECTRON: FINAL STATE, PHOTON: POLARIZATION, missing-mass [mass spectrum], N(1470) N(1535) [INTERFERENCE], ELECTROPRODUCTION: ETA(549), PHOTON [POLARIZATION], POLARIZATION: DIFFERENTIAL CROSS SECTION, DIFFERENTIAL CROSS SECTION: ANGULAR DEPENDENCE, POLARIZATION: PHOTON, EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER]
Abstract

153 pp. (1978).

Published
1978
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7. Untersuchung von Zerfällen der $J/\psi(3.1)$-Resonanz in Baryonenpaare mit dem magnetischen Detektor PLUTO

Author

Harms, Petra

Subjects
ANTILAMBDA: FINAL STATE, LAMBDA [FINAL STATE], J/PSI(3100): ELECTROPRODUCTION, ELECTROPRODUCTION [J/PSI(3100)], BRANCHING RATIO: BOUNDARY CONDITION, FINAL STATE [PHOTON], +P+ANTI-P%22">J/PSI(3100) --> P ANTI-P, FINAL STATE: ANTI-P, J/PSI(3100): BRANCHING RATIO, J/PSI(3100): NONLEPTONIC DECAY, MOMENTUM [ENERGY SPECTRUM], THESIS, PLUTO, BOUNDARY CONDITION [BRANCHING RATIO], +P+ANTI-P+PI%2B+PI%22">J/PSI(3100) --> P ANTI-P PI+ PI, FINAL STATE [PI+], J/PSI(3100) [NONLEPTONIC DECAY], ENERGY SPECTRUM: MOMENTUM, BRANCHING RATIO [J/PSI(3100)], ENERGY DEPENDENCE [TOTAL CROSS SECTION], TOTAL CROSS SECTION: ENERGY DEPENDENCE, P [FINAL STATE], COLLIDING BEAMS [ELECTRON POSITRON], PI+ [FINAL STATE], ANNIHILATION: ELECTRON POSITRON, ELECTROPRODUCTION: J/PSI(3100), FINAL STATE [SIGMA0], LAMBDA: FINAL STATE, ELECTRON POSITRON: COLLIDING BEAMS, ELECTRON POSITRON [ANNIHILATION], ANGULAR DEPENDENCE [MOMENTUM SPECTRUM], ANNIHILATION [ELECTRON POSITRON], FINAL STATE: P, FINAL STATE [ANTISIGMA0], PI+: FINAL STATE, J/PSI(3100) [ELECTROPRODUCTION], ANGULAR DISTRIBUTION, FINAL STATE [ANTI-P], PI-: FINAL STATE, FINAL STATE: PI, FINAL STATE: SIGMA0, PHOTON [FINAL STATE], MASS SPECTRUM, FINAL STATE [P], ANTI-P [FINAL STATE], ANTISIGMA0: FINAL STATE, P: FINAL STATE, +SIGMA0%28P+PI-+PHOTON%29+ANTISIGMA0%28ANTI-P+PI%22">J/PSI(3100) --> SIGMA0(P PI- PHOTON) ANTISIGMA0(ANTI-P PI, FINAL STATE [LAMBDA], ANTILAMBDA [FINAL STATE], ANTI-P: FINAL STATE, NONLEPTONIC DECAY [J/PSI(3100)], MOMENTUM SPECTRUM: ANGULAR DEPENDENCE, FINAL STATE [PI-], FINAL STATE: ANTILAMBDA, PHOTON: FINAL STATE, +LAMBDA%28P+PI-%29+ANTILAMBDA%28ANTI-P+PI%2B%29%22">J/PSI(3100) --> LAMBDA(P PI-) ANTILAMBDA(ANTI-P PI+), SIGMA0 [FINAL STATE], COLLIDING BEAMS: ELECTRON POSITRON, EXPERIMENTAL RESULTS, FINAL STATE: PI+, ANTISIGMA0 [FINAL STATE], +J%2FPSI%283100%29%22">ELECTRON POSITRON --> J/PSI(3100), FINAL STATE [ANTILAMBDA], FINAL STATE: PHOTON, DESY DORIS STOR, FINAL STATE: LAMBDA, +2PI%2B+2PI%22">J/PSI(3100) --> 2PI+ 2PI, ELECTRON POSITRON [COLLIDING BEAMS], FINAL STATE: ANTISIGMA0, 3.1 GEV-CM, NONLEPTONIC DECAY: J/PSI(3100), PI- [FINAL STATE], SIGMA0: FINAL STATE, ELECTRON POSITRON: ANNIHILATION
Abstract

46 pp. (1978).

Published
1978
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8. $\omega$-Meson Production by Virtual Photons

Author

Joos, P., Ladage, A., Skillicorn, I. O., Smith, K., Benz, C., Drews, G., Hoffmann, D., Knobloch, J., Kraus, W., Nagel, H., Rabe, E., Sander, C., Meyer, H., Schlatter, W.-D., Spitzer, H., Wacker, K., Stein, P., Wolf, G., Yellin, S., Chen, C. K., Knowles, J., Martin, D., and Scarr, J. M.

Subjects
ELECTRON [FINAL STATE], OMEGA(784): NONLEPTONIC DECAY, DIFFRACTION, NONLEPTONIC DECAY [OMEGA(784)], FINAL STATE [PI0], EXPERIMENTAL RESULTS: STREAMER CHAMBER, MODEL [DIFFERENTIAL CROSS SECTION], FINAL STATE [PI+], ELECTRON P [INTERACTION], P [FINAL STATE], FINAL STATE [ELECTRON], ONE-PION [EXCHANGE], INTERACTION [ELECTRON P], PI0 [FINAL STATE], (PI+ PI- PI0) [FINAL STATE], +P+OMEGA%28784%29%28PI%2B+PI-+PI0%29+ELECTRON%22">ELECTRON P --> P OMEGA(784)(PI+ PI- PI0) ELECTRON, PI+ [FINAL STATE], NONLEPTONIC DECAY [ANGULAR DISTRIBUTION], DESY ES, FINAL STATE: ELECTRON, ANGULAR DISTRIBUTION [NONLEPTONIC DECAY], DIFFERENTIAL CROSS SECTION: MODEL, 0.3-1.4 GEV-SQUARED [1.7-2.8 GEV-CM], FINAL STATE: P, PI+: FINAL STATE, PI0: FINAL STATE, EXCHANGE: ONE-PION, ELECTRON P: INTERACTION, PI-: FINAL STATE, NONLEPTONIC DECAY: ANGULAR DISTRIBUTION, OMEGA(784) [NONLEPTONIC DECAY], ELECTROPRODUCTION [OMEGA(784)], FINAL STATE: (PI+ PI- PI0), FINAL STATE: PI, FINAL STATE: PI0, DIFFERENTIAL CROSS SECTION [MODEL], MASS SPECTRUM, FINAL STATE [P], DIFFERENTIAL CROSS SECTION, P: FINAL STATE, FINAL STATE [PI-], STREAMER CHAMBER: EXPERIMENTAL RESULTS, MODEL: DIFFERENTIAL CROSS SECTION, ddc:530, INTERACTION: ELECTRON P, ELECTROPRODUCTION: OMEGA(784), NONLEPTONIC DECAY: OMEGA(784), OMEGA(784) [ELECTROPRODUCTION], FINAL STATE: PI+, ELECTRON: FINAL STATE, STREAMER CHAMBER [EXPERIMENTAL RESULTS], 1.7-2.8 GEV-CM: 0.3-1.4 GEV-SQUARED, DENSITY MATRIX [SPIN], OMEGA(784): ELECTROPRODUCTION, TOTAL CROSS SECTION, SPIN: DENSITY MATRIX, ANGULAR DISTRIBUTION: NONLEPTONIC DECAY, EXPERIMENTAL RESULTS [STREAMER CHAMBER], PI- [FINAL STATE]
Abstract

(1977). doi:10.1016/0550-3213(77)90133-X, Qausi-elastic ω production by ep scattering in the kinematic region 0.3. < Q 2 < 1.4 GeV 2 and 1.7 < W < 2.8 GeV was studied using a streamer chamber at DESY. The production angular distribution for γ V p → ω p has a strong non-peripheral component for W < 2 GeV. The ω production cross section falls by a factor of 4 as W changes from 1.7 to 2.8 GeV. In contrast the cross section for ω production with | t | < 0.5 GeV 2 is W independent between 1.7 and 2.8 GeV and for W > 2.0 GeV consistent in both W and Q 2 dependence with the predictions of a model based on one-pion exchange and diffraction.

Published
1977
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9. A Model for the process $e^+e^- \to \rho^0\mathcal{E}$

Author

Gutbrod, F. and Weiss, U.

Subjects
FINAL STATE: PI, +P+2PI%2B+2PI%22">PHOTON P --> P 2PI+ 2PI, FINAL STATE [P], RHO(765), HELICITY, P: FINAL STATE, +2PI%2B+2PI%22">ELECTRON POSITRON --> 2PI+ 2PI, +RHO%28765%29+EPSILON%28700%29%22">ELECTRON POSITRON --> RHO(765) EPSILON(700), FINAL STATE [PI-], PHOTON P: INTERACTION, NUMERICAL CALCULATIONS, INTERACTION [PHOTON P], FINAL STATE [PI+], FINAL STATE: PI+, P [FINAL STATE], ONE-PION [EXCHANGE], FEYNMAN GRAPH, INTERACTION: PHOTON P, PI+ [FINAL STATE], ANNIHILATION: ELECTRON POSITRON, RHO'(1600), ELECTRON POSITRON [ANNIHILATION], ANNIHILATION [ELECTRON POSITRON], FINAL STATE: P, EPSILON(700), PHOTON P [INTERACTION], PI+: FINAL STATE, COUPLING CONSTANT, EXCHANGE: ONE-PION, PI- [FINAL STATE], INTERPRETATION OF EXPERIMENTS, PI-: FINAL STATE, ELECTRON POSITRON: ANNIHILATION, FORM FACTOR
Abstract

23 pp. (1975).

Published
1975
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10. Targetasymmetrie der Wirkungsquerschnitte in der $\pi^{-}$-Photoproduktion am Neutron eines polarisierten Deuterontargets

Author

Knütel, Jochen

Subjects
FINAL STATE: PI, REGGE POLES, FINAL STATE [P], DIFFERENTIAL CROSS SECTION, P: FINAL STATE, FINAL STATE [PI-], THESIS, PHOTON N: INTERACTION, MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, INTERACTION [PHOTON N], EXCHANGE: A2(1310), PI-: PHOTOPRODUCTION, EXCHANGE: RHO(765), PHOTOPRODUCTION: PI, MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], 5.0 GEV: 0.1-1.0 (GEV/C)-SQUARED [3.4], P [FINAL STATE], A2(1310) [EXCHANGE], ASYMMETRY [TARGET], RHO(765) [EXCHANGE], POLARIZED TARGET [DEUTERON], INTERACTION: PHOTON N, PHOTON N [INTERACTION], PHOTOPRODUCTION [PI-], +P+PI%22">PHOTON N --> P PI, DESY ES, DEUTERON: POLARIZED TARGET, PI- [PHOTOPRODUCTION], TARGET: ASYMMETRY, FINAL STATE: P, PI- [FINAL STATE], EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, PI-: FINAL STATE, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER], 3.4: 5.0 GEV: 0.1-1.0 (GEV/C)-SQUARED
Abstract

74 pp. (1977).

Published
1977
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11. Elektroproduktion neutraler Pionen oberhalb des Resonanzgebietes

Author

Mess, Karl Hubert

Subjects
REGGE CUT [REGGE POLES], COUNTERS AND DETECTORS: EXPERIMENTAL RESULTS, ELECTRON [FINAL STATE], PI0 [ELECTROPRODUCTION], FINAL STATE: PI0, RADIATIVE CORRECTION, PI0: ELECTROPRODUCTION, FINAL STATE [P], PHOTOPRODUCTION [PI0], P: FINAL STATE, BIBLIOGRAPHY, ELECTROPRODUCTION: PI0, PI0: PHOTOPRODUCTION, 2.6 GEV-CM, FINAL STATE [PI0], ELECTROPRODUCTION [PI0], REGGE POLES: REGGE CUT, ELECTRON P [INTERACTION], KINEMATICS, INTERACTION: ELECTRON P, EXPERIMENTAL RESULTS: COUNTERS AND DETECTORS, PHOTOPRODUCTION: PI0, COUNTERS AND DETECTORS [EXPERIMENTAL RESULTS], EXPERIMENTAL EQUIPMENT, ELECTRON: FINAL STATE, P [FINAL STATE], DIFFERENTIAL CROSS SECTION: TABLES, Thesis, FINAL STATE [ELECTRON], INTERACTION [ELECTRON P], PI0 [FINAL STATE], EXPERIMENTAL RESULTS [COUNTERS AND DETECTORS], DESY ES, FINAL STATE: ELECTRON, TABLES [DIFFERENTIAL CROSS SECTION], +P+PI0+ELECTRON%22">ELECTRON P --> P PI0 ELECTRON, PI0 [PHOTOPRODUCTION], FINAL STATE: P, PI0: FINAL STATE, ELECTRON P: INTERACTION
Abstract

72 pp. (1975).

Published
1975
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12. Elastic $\pi^0$ electroproduction above the resonance region

Author

Berger, Christoph, Buhring, R., Reich, H. D., Specht, G., Ganssauge, E., Janata, F., Schmidt, D., Dick, G., Grigull, R., Meyer-Wachsmuth, H., Wagner, W., Ackermann, H., Azemoon, T., Gabriel, W., and Mertiens, H. D.

Subjects
ELECTRON [FINAL STATE], PI0 [ELECTROPRODUCTION], FINAL STATE: PI0, PI0: ELECTROPRODUCTION, FINAL STATE [P], Nuclear Theory, 0.1-0.7 GEV-SQUARED [4 GEV], P: FINAL STATE, ELECTROPRODUCTION: PI0, DIP [DIFFERENTIAL CROSS SECTION], FINAL STATE [PI0], ONE-PHOTON [EXCHANGE], ELECTROPRODUCTION [PI0], MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, ddc:530, ELECTRON P [INTERACTION], INTERACTION: ELECTRON P, MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], ELECTRON: FINAL STATE, DIFFERENTIAL CROSS SECTION: DIP, P [FINAL STATE], FINAL STATE [ELECTRON], INTERACTION [ELECTRON P], 4 GEV: 0.1-0.7 GEV-SQUARED, ELECTROPRODUCTION: ASYMMETRY, PI0 [FINAL STATE], DESY ES, FINAL STATE: ELECTRON, ASYMMETRY [ELECTROPRODUCTION], EXCHANGE: ONE-PHOTON, +P+PI0+ELECTRON%22">ELECTRON P --> P PI0 ELECTRON, FINAL STATE: P, PI0: FINAL STATE, ELECTRON P: INTERACTION, EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER]
Abstract

(1978). doi:10.1016/0550-3213(78)90045-7, We report on the measurement of the process e + p → e + p + π 0 at energies above the resonance region. The pions are predominantly produced perpendicular to the electron scattering plane. The cross section shows a dip at the minimum momentum transfer. Both features are expected from comparison with photoproduction.

Published
1978
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13. High-energy electron scattering from $^6$Li and $^{12}$C

Author

Heimlich, F. H., Koebberling, M., Moritz, J., Schmidt, K. H., Wegener, D., Zeller, D., Bienlein, J. K., Bleckwenn, J., and Dinter, H.

Subjects
nonstrange: baryon resonance, 2.0: 2.5: 2.7 gev: 5-12 q-squared (1/f)-squared, interaction: electron n, nucleon: bound state, electron p: interaction, CROSS SECTION: RATIO, electron n: interaction, MODEL: CLUSTER, NUMERICAL CALCULATIONS: INTERPRETATION OF EXPERIMENTS, radiative correction, 2.0-2.7 GEV, total cross section, ELASTIC SCATTERING: ELECTRON DEUTERON, nucleon: form factor, baryon resonance: electroproduction, momentum: spectrum, DELTA(1236): ELECTROPRODUCTION, EMISSION: MOMENTUM TRANSFER, interaction: electron light nucleus, electroproduction: baryon resonance, FINAL STATE: ELECTRON, baryon resonance: nonstrange, LIGHT NUCLEUS: FINAL STATE, lithium, electron light nucleus: elastic scattering, FINAL STATE: P, CORRELATION: SHORT-RANGE, interaction: electron p, electron light nucleus: interaction, electron: differential cross section, differential cross section: electron, P: FINAL STATE, ELECTROPRODUCTION: DELTA(1236), nucleon: momentum, model: fermi gas, elastic scattering: electron light nucleus, ELECTRON DEUTERON: ELASTIC SCATTERING, spectrum: momentum, +LIGHT+NUCLEUS+DEUTERON+ELECTRO%22">ELECTRON LIGHT NUCLEUS --> LIGHT NUCLEUS DEUTERON ELECTRO, DEUTERON: FINAL STATE, FINAL STATE: LIGHT NUCLEUS, ELECTRON: FINAL STATE, nucleon nucleon: correlation, EMISSION: DEUTERON, POTENTIAL SCATTERING, carbon, FINAL STATE: DEUTERON, MODEL: OSCILLATOR, shell model, form factor: nucleon, MODEL: GUTBROD-SIMON, desy es, +LIGHT+NUCLEUS+P+ELECTRON%22">ELECTRON LIGHT NUCLEUS --> LIGHT NUCLEUS P ELECTRON
Abstract

1-22 (1974)., We have measured the spectra of electrons scattered from 6 Li and 12 C for invariant masses of the hadronic system W ≦ 1.5 GeV and four momentum transfers in the range 5 fm −2 ≦ q 2 ≦ 12 fm −2 . We compared the shape of the spectra with different nuclear models. The Fermigas model of the nucleus cannot reproduce the data. A shell model with short-range correlations fits the data with a correlation parameter q c ≈ 250 MeV/ c . From the absolute cross section the effective number of nucleons was derived for quasi-elastic scattering and found to be compatible with A , whereas the effective number of nucleons derived for the excitation of the Δ(1236) resonance was found to be 0.6 A .

Published
1974
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