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5 results on '"STREAMER CHAMBER [EXPERIMENTAL RESULTS]"'

1. $\omega$-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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2. Hadron production by electrons in the deep inelastic region

Author

Cohen, I., Erickson, R., Messing, F., Nordberg, E., Siemann, R., Smith-Kintner, J., Stein, P., Drews, G., Gebert, W., Joos, P., Ladage, A., Nagel, H. J., Soding, P., and Sadoff, A.

Subjects
ELECTROPRODUCTION: LAMBDA, CHARGE: RATIO, ELECTRON [FINAL STATE], FRAGMENTATION [QUARK], (PI+ PI-) [MASS SPECTRUM], HADRON [FINAL STATE], ELECTRON P [DEEP INELASTIC SCATTERING], INCLUSIVE REACTION [ELECTRON P], ELECTROPRODUCTION [K0], EXPERIMENTAL RESULTS: STREAMER CHAMBER, HADRON: ELECTROPRODUCTION, LONGITUDINAL MOMENTUM [SPECTRUM], ELECTROPRODUCTION [HADRON], MASS SPECTRUM: (PI+ PI-), STREAMER CHAMBER: EXPERIMENTAL RESULTS, ELECTRON P: DEEP INELASTIC SCATTERING, LAMBDA [ELECTROPRODUCTION], 0.5-0.6 GEV-SQUARED [UP TO 4.2 GEV-CM], ELECTROPRODUCTION: HADRON, FINAL STATE [HADRON], +HADRON+ELECTRON+ANYTHING%22">ELECTRON P --> HADRON ELECTRON ANYTHING, DEEP INELASTIC SCATTERING: ELECTRON P, K0 [ELECTROPRODUCTION], ELECTROPRODUCTION [LAMBDA], ELECTRON P: INCLUSIVE REACTION, ELECTRON: FINAL STATE, HADRON [ELECTROPRODUCTION], FINAL STATE [ELECTRON], STREAMER CHAMBER [EXPERIMENTAL RESULTS], SPECTRUM: LONGITUDINAL MOMENTUM, FINAL STATE: ELECTRON, DEEP INELASTIC SCATTERING [ELECTRON P], RATIO [CHARGE], HADRON: MULTIPLICITY, ELECTROPRODUCTION: K0, TRANSVERSE MOMENTUM [SPECTRUM], CORNELL ES, MASS SPECTRUM: (P PI-), UP TO 4.2 GEV-CM: 0.5-0.6 GEV-SQUARED, (P PI-) [MASS SPECTRUM], SPECTRUM: TRANSVERSE MOMENTUM, K0: ELECTROPRODUCTION, LAMBDA: ELECTROPRODUCTION, QUARK: FRAGMENTATION, MULTIPLICITY [HADRON], EXPERIMENTAL RESULTS [STREAMER CHAMBER], HADRON: FINAL STATE, FINAL STATE: HADRON
Abstract

43 pp. (1977).

Published
1977

3. Charged hadron multiplicities and inclusive $\pi^-$ distributions in inelastic $ep$-Scattering

Author

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

Subjects
MULTIPLE PRODUCTION [HADRON], PRODUCTION: PI, INCLUSIVE REACTION [ELECTRON P], EXPERIMENTAL RESULTS: STREAMER CHAMBER, PRODUCTION [PI-], PI-: PRODUCTION, MULTIPLE PRODUCTION: HADRON, TABLES, SPECTRUM [INCLUSIVE REACTION], PHOTOPRODUCTION: HADRON, STREAMER CHAMBER: EXPERIMENTAL RESULTS, HADRON [PHOTOPRODUCTION], ddc:530, ELECTRON P [INTERACTION], INCLUSIVE REACTION [SPECTRUM], INTERACTION: ELECTRON P, PHOTOPRODUCTION [HADRON], CHARGED PARTICLE: MULTIPLICITY, ELECTRON P: INCLUSIVE REACTION, CHANNEL CROSS SECTION, INTERACTION [ELECTRON P], STREAMER CHAMBER [EXPERIMENTAL RESULTS], INCLUSIVE REACTION: SPECTRUM, UP TO 2.8 GEV-CM: 0.3-1.4 GEV-SQUARED, HADRON [MULTIPLE PRODUCTION], MULTIPLICITY [CHARGED PARTICLE], HADRON: MULTIPLE PRODUCTION, SPECTRUM: INCLUSIVE REACTION, PI- [PRODUCTION], DESY ES, 0.3-1.4 GEV-SQUARED [UP TO 2.8 GEV-CM], EXPERIMENTAL RESULTS [STREAMER CHAMBER], MOMENTUM TRANSFER [MULTIPLICITY], ELECTRON P: INTERACTION, MULTIPLICITY: MOMENTUM TRANSFER, HADRON: PHOTOPRODUCTION
Abstract

(1978). doi:10.1016/0550-3213(78)90167-0, Electroproduction of hadrons is studied in the kinematic region W < 2.8 GeV and 0.3 < Q 2 < 1.4 GeV 2 using the DESY streamer chamber. Prong cross sections, charged-particle multiplicities and inclusive π − distributions are presented. The average charged multiplicity is found to be independent of Q 2 in the Q 2 range studied here; however it is lower than in photoproduction. The fraction of forward π − is found to be significantly less in electroproduction than in photoproduction. The 〈 p ⊥ 2 〉 for inclusive π − is, for all x values, similar to that found in photoproduction.

Published
1977

4. Hadron production by virtual photons in the quark fragmentation region

Author

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

Subjects
FRAGMENTATION [QUARK], CHARGE: RATIO, RADIATIVE CORRECTION, HADRON [FINAL STATE], Nuclear Theory, INCLUSIVE REACTION [ELECTRON P], CHANNEL CROSS SECTION: ENERGY DEPENDENCE, +HADRON+ANYTHING%22">ELECTRON P --> HADRON ANYTHING, EXPERIMENTAL RESULTS: STREAMER CHAMBER, HADRON: ELECTROPRODUCTION, ELECTROPRODUCTION [HADRON], CHANNEL CROSS SECTION: MOMENTUM TRANSFER, STREAMER CHAMBER: EXPERIMENTAL RESULTS, ddc:530, ELECTROPRODUCTION: HADRON, Nuclear Experiment, FINAL STATE [HADRON], ELECTRON P: INCLUSIVE REACTION, HADRON [ELECTROPRODUCTION], STREAMER CHAMBER [EXPERIMENTAL RESULTS], High Energy Physics::Phenomenology, MODEL: QUARK PARTON, DESY ES, QUARK PARTON [MODEL], 0.3-1.4 GEV-SQUARED [1.8-2.8 GEV-CM], HADRON: CHARGED PARTICLE, CHARGED PARTICLE [HADRON], RATIO [CHARGE], 1.8-2.8 GEV-CM: 0.3-1.4 GEV-SQUARED, High Energy Physics::Experiment, EXPERIMENTAL RESULTS [STREAMER CHAMBER], QUARK: FRAGMENTATION, HADRON: FINAL STATE, FINAL STATE: HADRON, ENERGY DEPENDENCE [CHANNEL CROSS SECTION], MOMENTUM TRANSFER [CHANNEL CROSS SECTION]
Abstract

(1978). doi:10.1016/0550-3213(78)90128-1, We have measured the inclusive electroproduction of positive and negative hadrons in the quark fragmentation region using the streamer chamber at DESY. Data are presented in terms of the variable z p = p / v in the kinematic region 1.8 < W < 2.8 GeV and 0.3 < Q 2 < 1.4 GeV 2 . The positive hadron distributions contain a strong proton component. After subtraction of the proton component and elastic rho events, the distribution (1/ σ tot ) d σ /d z p for positive and negative hadrons agrees well with the corresponding distribution from e + e − annihilation (DORIS data). This behaviour supports the validity of the quark-parton model at surprisingly low Q 2 and W .

Published
1977
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5. Inclusive $K^0_S$ and $\Lambda$ Electroproduction

Author

Cohen, I., Erickson, R., Ladage, A., Nagel, H., Soding, P., Sadoff, A., Messing, F., Nordberg, E., Siemann, R., Smith-Kintner, J., Stein, P., Drews, G., Gebert, W., and Joos, P.

Subjects
FRAGMENTATION [QUARK], ELECTRON [FINAL STATE], +K0%28S%29+ELECTRON+ANYTHING%22">ELECTRON P --> K0(S) ELECTRON ANYTHING, FINAL STATE [ELECTRON], LAMBDA [FINAL STATE], STREAMER CHAMBER [EXPERIMENTAL RESULTS], High Energy Physics::Phenomenology, Nuclear Theory, INCLUSIVE REACTION [ELECTRON P], LONGITUDINAL MOMENTUM [SPECTRUM], FINAL STATE [LAMBDA], +LAMBDA+ELECTRON+ANYTHING%22">ELECTRON P --> LAMBDA ELECTRON ANYTHING, TRANSVERSE MOMENTUM [SPECTRUM], CORNELL ES, LAMBDA [ELECTROPRODUCTION], ddc:550, Physics::Accelerator Physics, High Energy Physics::Experiment, EXPERIMENTAL RESULTS [STREAMER CHAMBER], Nuclear Experiment, 11.5 GEV, ELECTROPRODUCTION [K0(S)], ELECTROPRODUCTION [LAMBDA], K0(S) [ELECTROPRODUCTION]
Abstract

Cross sections for inclusive electroproduction of Ks0's and Λ's have been measured. The Ks0 results are combined with data from electron-positron annihilation and charged K electroproduction to give information on quark fragmentation into strange particles. The longitudinal- and transverse-momentum distributions for Λ's are compared with those of electroproduced protons.

Published
1978

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