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40 results on '"spectrum: transverse momentum"'

1. Quasielastic J/ψ muoproduction from hydrogen, deuterium, carbon and tin

Author: Quentin Ingram, M. van der Heijden, Chiara Mariotti, Amedeo Staiano, T. Lindqvist, M. Szleper, A. Mücklich, Michele Arneodo, A. Milsztajn, G. van Middelkoop, B. Povh, E.M. Kabuß, A. Brüll, R. Kaiser, R. Rieger, A. Simon, L. Fluri, F. Klein, L. Ropelewski, J. Nassalski, B. Badelek, J. L. Vuilleumier, W. Brückner, S. Kullander, M. Siebler, Thomas Walcher, M. de Jong, A. Paić, J. Oberski, J. Ciborowski, C. Broggini, I. G. Bird, Roland Windmolders, A. Arvidson, K. Röhrich, G. K. Mallot, W. J. Burger, Y. Mizuno, J. Beaufays, M.I. Ferrero, K. Janson-Prytz, M. Botje, A. Witzmann, C. Peroni, P. Björkholm, T.-A. Shibata, R. Seitz, C. Scholz, K. Rith, R. van Dantzig, G. Baum, C. A. Heusch, D. Nowotny, A. Sandacz, E. Rondio, T. Granier, Ulrich Landgraf, M. Ballintijn, F. Sever, F. Zetsche, Tjeerd Ketel, Y. Tzamouranis, U. Gaul, A. Dyring, D. von Harrach, D. Sanders, H. Engelien, and M. Virchaux
Subjects: Nuclear and High Energy Physics, forward spectrometer: experimental results, CHARMONIUM PHOTOPRODUCTION, vector dominance, Hydrogen, Meson, DEEP INELASTIC-SCATTERING, COLOR TRANSPARENCY, ELASTIC-SCATTERING, MUON SCATTERING, NUCLEI, RATIO, chemistry.chemical_element, Elementary particle, interaction: muon nucleus, color: transparency, Nuclear physics, rho(770): leptoproduction, tin, model: Glauber, spectrum: transverse momentum, leptoproduction: rho(770), 200: 280 GeV, deuterium, Physics, Elastic scattering, Muon, carbon, muon nucleus: interaction, Vector meson dominance, leptoproduction: J/psi(3100), CERN SPS, J/psi(3100): leptoproduction, Deuterium, chemistry, transverse momentum: spectrum, interaction: muon p, Atomic physics, muon p: interaction, Glauber
Abstract: Quasielastic production of J / ψ mesons has been measured in muon interactions with hydrogen, deuterium, carbon and tin targets at incident muon energies of 200 and 280 GeV. The hydrogen and deuterium data were used to study the transverse momentum distribution of the J / ψ 's. These data have been analysed together with previously published ϱ 0 data in the framework of the vector meson dominance model. The radii of the Jψ and the ϱ 0 as well as the total J / ψ - N and ϱ 0 - N cross sections were deduced. From the tin and carbon data the ratio of the quasielastic J / ψ production cross sections, R qe (Sn/C), has been extracted and found to be less than unity. In the Glauber approach this suppression can be related to the J / ψ absorption probability in nuclei. The suppression is also compared to those predicted by various colour transparency models.
Published: 1994
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2. Large $\mathrm{p_\perp}$ heavy quark production in two photon collisions

Author: Cacciari, M., Greco, Mario, Kniehl, Bernd A., Kramer, M., Kramer, G., and Spira, M.
Subjects: photoproduction [quark], two-photon [exchange], transverse momentum: high, fragmentation function, interaction [photon photon], high [transverse momentum], photon photon: interaction, photoproduction: quark, backscatter [laser], quark: charm, charm [quark], spectrum: transverse momentum, quantum chromodynamics, 500 GeV-cms (electron positron) [175], ddc:530, inclusive reaction [electron positron], numerical calculations, exchange: two-photon, 175: 500 GeV-cms (electron positron), photon photon [interaction], perturbation theory: higher-order, electron positron: inclusive reaction, backscatter: laser, transverse momentum [spectrum], quark: photoproduction, laser: backscatter, higher-order [perturbation theory], equivalent photon approximation, interaction: photon photon, rapidity spectrum, quark [photoproduction], transverse momentum: spectrum, two-photon: exchange, spectrum [transverse momentum], laser [backscatter], exchange [two-photon]
Abstract: 17 pp. (1996)., The next-to-leading-order (NLO) cross section for the production of heavy quarks at large transverse momenta ( p ⊥ in γγ collisions is calculated with perturbative fragmentation functions (PFFs). This approach allows for a resummation of terms ∝ α s ln( p 2 ⊥ / m 2 ) which arise in NLO from collinear emission of gluons by heavy quarks at large p ⊥ or from almost collinear branching of photons or gluons into heavy-quark pairs. We present single-inclusive distributions in p ⊥ and rapidity including direct and resolved photons for γγ production of heavy quarks at e + e − colliders and at high-energy γγ colliders. The results are compared with the fixed-order calculation for m finite including QCD radiative corrections. The two approaches differ in the definitions and relative contributions of the direct and resolved terms, but essentially agree in their sum. The resummation of the α s ln( p 2 ⊥ / m 2 ) terms in the PFF approach leads to a softer p ⊥ distribution and to a reduced sensitivity to the choice of the renormalization and factorization scales.
Published: 1996
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3. Charm photoproduction via fragmentation

Author: Mario Greco, Matteo Cacciari, M., Cacciari, and Greco, Mario
Subjects: photoproduction [quark], Particle physics, Physics and Astronomy (miscellaneous), 296 GeV-cms, fragmentation function, renormalization, Nuclear physics, Renormalization, photoproduction: quark, quark: charm, charm [quark], Fragmentation (mass spectrometry), Factorization, factorization, inclusive reaction [photon p], quantum chromodynamics, spectrum: transverse momentum, ddc:530, Open charm, Resummation, numerical calculations, Quantum chromodynamics, Physics, perturbation theory: higher-order, transverse momentum [spectrum], quark: photoproduction, higher-order [perturbation theory], Formalism (philosophy of mathematics), rapidity spectrum, quark [photoproduction], transverse momentum: spectrum, Phase space, spectrum [transverse momentum], photon p: inclusive reaction
Abstract: Berlin : Springer 10 pp. (1996)., The next-to-leading open charm production in $\gamma p$ collisions is calculated within the Perturbative Fragmentation Functions formalism, to allow resummation of $\as\log(\pt^2/m^2)$ terms. In the large $\pt$ region $(\pt > m)$ the result is consistent with the fixed order NLO calculation, small discrepancies being found for very large $\pt$ and at the edge of phase space. The two approaches differ in the definition and the relative contribution of the direct and resolved terms, but essentially agree on their sum. The resummation is found to lead to a reduced sensitivity to the choice of the renormalization/factorization scale., Published by Springer, Berlin
Published: 1996
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4. QCD corrections to inelastic J/$\psi$ photoproduction

Author: Krämerr, Michael
Subjects: bremsstrahlung: gluon, renormalization: dependence, gluon [bremsstrahlung], J/psi(3100) [photoproduction], electron p: inclusive reaction, energy spectrum, correction [quantum chromodynamics], fusion: photon gluon, gluon: bremsstrahlung, electroproduction: J/psi(3100), quantum chromodynamics: correction, photon quark [interaction], numerical calculations: interpretation of experiments, photoproduction [J/psi(3100)], interpretation of experiments [numerical calculations], inclusive reaction [photon p], J/psi(3100): photoproduction, spectrum: transverse momentum, ddc:530, higher-order [Feynman graph], interaction [photon quark], channel cross section: energy dependence, bremsstrahlung [gluon], J/psi(3100) [electroproduction], J/psi(3100): electroproduction, exchange [one-photon], Feynman graph: higher-order, perturbation theory: higher-order, dependence [renormalization], photoproduction: J/psi(3100), bibliography, one-photon: exchange, transverse momentum [spectrum], energy dependence [channel cross section], interaction: photon quark, electroproduction [J/psi(3100)], higher-order [perturbation theory], photon gluon [fusion], DESY HERA Stor, transverse momentum: spectrum, one-photon [exchange], spectrum [transverse momentum], inclusive reaction [electron p], photon p: inclusive reaction, photon quark: interaction, exchange: one-photon
Abstract: 42 pp. (1996)., We present a complete calculation of the higher-order perturbative QCD corrections to inelastic photoproduction of J / ψ particles. A comprehensive analysis of total cross sections and differential distributions for the energy range of the fixed-target experiments and for inelastic J/ψ photoproduction at HERA is performed. The cross section and the J / ψ energy spectrum are compared wth the available photoproduction data including first results from HERA. This analysis will not only provide information on the gluon distribution of the proton but appears to be a clean test for the underlying picture of quarkonium production as developed so far in the perturbative QCD sector.
Published: 1996
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5. Inclusive charged particle distributions in deep inelastic scattering events at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Palmonari, F., Polini, A., Sartorelli, G., Zamora Garcia, Y., Zichichi, A., Bornheim, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Heinz, L., Hilger, E., Jakob, H. P., Katz, U. F., Mengel, S., Mollen, J., Paul, E., Pfeiffer, M., Rembser, C., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W. N., Dyce, N., Foster, B., George, S., Hayes, M. E., Heath, G. P., Heath, Helen F., Morgado, C. J. S., O'Mara, J. A., Piccioni, D., Roff, D. G., Tapper, R. J., Yoshida, R., Rau, R. R., Arneodo, M., Ayad, R., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jelen, K., Kisielewska, D., Kowalski, T., Przybycien, M., Rulikowska-Zarebska, E., Suszycki, L., Zajac, J., Kotanski, A., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasinski, M., Gilkinson, D. J., Glasman, C., Gottlicher, P., Grosse-Knetter, J., Gutjahr, B., Haas, Tobias M., Hain, W., Hasell, D., Hessling, H., Iga, Y., Johnson, K., Joos, P., Kasemann, M., Klanner, R., Koch, W., Kopke, L., Kotz, U., Kowalski, H., Labs, J., Ladage, A., Lohr, B., Lowe, M., Luke, D., Mainusch, J., Manczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldan, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voss, T., Westphal, D., Wolf, G., Youngman, C., Zeuner, W., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mari, S. M., Mattingly, M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Gallo, E., Pelfer, P., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Soldner-Rembold, S., Schroeder, J., Trefzger, T., Bromley, J. T., Brook, N. H., Bussey, P. J., Doyle, A. T., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Brummer, N., Butterworth, I., Harris, V. L., Hung, B. H. Y., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Cho, G. H., Ko, B. J., Lee, S. B., Nam, S. W., Park, H. S., Park, S. K., Imlay, R., Kartik, S., Kim, H. J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernandez, J. M., Hervas, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Troconiz, J. F., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C., Patel, P. M., Sinclair, L. E., Stairs, D. G., St. Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagian, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu. A., Kobrin, V. D. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Nylander, P., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, David C., Byrne, A., Cashmore, R. J., Cooper-Sarkar, Amanda M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Okrasinski, J. R., Whitmore, J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, William S., Rahn, J. T., Sadrozinski, H. F., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, Gunter, Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Fleck, J. I., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Benard, F., Brkic, M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, Cortney R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyzanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wroblewski, A. K., Zakrzewski, Janusz Andrzej, Zarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. P., Frisken, William R., Khakzad, M., Murray, W. N., Schmidke, W. B., and ZEUS Collaboration
Subjects: electron p: deep inelastic scattering, gap [rapidity], electron p [deep inelastic scattering], electron p: inclusive reaction, energy spectrum, hadron [electroproduction], electroproduction: charged particle, electroproduction [charged particle], 296 GeV-cms, hadron: electroproduction, electroproduction [hadron], deep inelastic scattering: electron p, spectrum: transverse momentum, charged particle [electroproduction], ddc:530, charged particle: electroproduction, colliding beams [electron p], electroproduction: hadron, bibliography, ZEUS, electron p [colliding beams], transverse momentum [spectrum], rapidity: gap, colliding beams: electron p, DESY HERA Stor, electron p: colliding beams, transverse momentum: spectrum, deep inelastic scattering [electron p], spectrum [transverse momentum], inclusive reaction [electron p], experimental results
Abstract: 34 pp. (1996)., A measurement of inclusive charged particle distributions in deep inelastic $ep$ scattering for $\gamma~* p$ centre-of-mass energies $75< W < 175$GeV and momentum transfer squared $10< Q~2 < 160$GeV$~2$ from the ZEUS detector at HERA is presented. The differential charged particle rates in the $\gamma~* p$ centre-of-mass system as a function of the scaled longitudinal momentum, $x_F$, and of the transverse momentum, $p_t~*$ and $\,\,$ , as a function of $x_F$, $W$ and $Q~2$ are given. Separate distributions are shown for events with (LRG) and without (NRG) a rapidity gap with respect to the proton direction. The data are compared with results from experiments at lower beam energies, with the naive quark parton model and with parton models including perturbative QCD corrections. The comparison shows the importance of the higher order QCD processes. Significant differences of the inclusive charged particle rates between NRG and LRG events at the same $W$ are observed. The value of $\,\,$ for LRG events with a hadronic mass $M_X$, which excludes the forward produced baryonic system, is similar to the $\,\,$ value observed in fixed target experiments at $W \approx M_X$.
Published: 1996
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6. Messung der Kopplungskonstanten $\alpha_{s}$ der starken Wechselwirkung aus Jetraten in der tiefinelastischen $e p$-Streuung bei HERA

Author: Trefzger, Thomas M.
Subjects: electron p: deep inelastic scattering, renormalization: dependence, final state: (3jet), thesis, bibliography, ZEUS, electroproduction: jet, colliding beams: electron p, jet: electroproduction, DESY HERA Stor, electron p: colliding beams, deep inelastic scattering: electron p, rapidity spectrum, strong interaction: coupling constant, transverse momentum: spectrum, quantum chromodynamics, mass spectrum: (2jet), spectrum: transverse momentum, track data analysis: cluster, (2jet): mass spectrum, (3jet): final state, coupling constant: strong interaction, channel cross section: momentum transfer, experimental results
Abstract: Universität Freiburg, Diss., 1996; 147 pp. (1996). = Universität Freiburg, Diss., 1996
Published: 1996
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7. Deep inelastic final states in a space-time description of shower development and hadronization

Author: Ellis, John R., Geiger, Klaus, and Kowalski, H.
Subjects: electron p: deep inelastic scattering, interpretation of experiments: DESY HERA Stor, bibliography, showers: hadronic, model: cascade, nonperturbative, hadron: energy flow, mass spectrum, hard scattering, deep inelastic scattering: electron p, multiple production: hadron, space-time, model: hadronization, transverse momentum: spectrum, rapidity spectrum: gap, hadron: multiple production, spectrum: transverse momentum, time dependence, model: cluster, numerical calculations
Abstract: Physical review / D 54(9), 5443 - 5462 (1996). doi:10.1103/PhysRevD.54.5443, We extend a quantum kinetic approach to the description of hadronic showers in space, time and momentum space to deep-inelastic $ep$ collisions, with particular reference to experiments at HERA. We follow the history of hard scattering events back to the initial hadronic state and forward to the formation of colour-singlet pre-hadronic clusters and their decays into hadrons. The time evolution of the space-like initial-state shower and the time-like secondary partons are treated similarly, and cluster formation is treated using a spatial criterion motivated by confinement and a non-perturbative model for hadronization. We calculate the time evolution of particle distributions in rapidity, transverse and longitudinal space. We also compare the transverse hadronic energy flow and the distribution of observed hadronic masses with experimental data from HERA, and find encouraging results. The techniques developed in this paper may be applied in the future to more complicated processes such as eA, pp, pA and AA collisions., Published by Inst., Woodbury, NY
Published: 1996
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8. Heavy quark correlations in direct photon-photon collisions

Author: Kramer, Michael and Laenen, Eric
Subjects: annihilation: electron positron, exchange: two-photon, photon photon: exclusive reaction, quark: correlation, perturbation theory: higher-order, electron positron: annihilation, (quark antiquark): mass spectrum, 175: 500 GeV-cms, quark: pair production, pair production: quark, quark: charm, rapidity, transverse momentum: spectrum, quantum chromodynamics, spectrum: transverse momentum, heavy quark, angular distribution, two-photon: exchange, mass spectrum: (quark antiquark), numerical calculations
Abstract: In two-photon collisions at LEP2 and a future e + e − linear collider heavy quarks (mainly charm) will be pair-produced rather copiously. The production via direct and resolved photons can be distinguished experimentally via a remnant-jet tag. We study correlations of the heavy quarks at next-to-leading order in QCD in the direct channel, which is free from phenomenological parton densities in the photon. These correlations are therefore directly calculable in perturbative QCD and provide a stringent test of the production mechanism.
Published: 1996
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9. Cross-sections for charm production in $e$ $p$ collisions: Massive versus massless scheme

Author: Kniehl, Bernd A., Kraemer, Martin, Kramer, G., and Spira, M.
Subjects: photoproduction [quark], transverse momentum: high, electron p: inclusive reaction, structure function [p], electroproduction [quark], high [transverse momentum], photoproduction: quark, massless [quark], quark: charm, quark: massless, charm [quark], spectrum: transverse momentum, ddc:530, photon: structure function, quark: electroproduction, p: structure function, electroproduction: quark, numerical calculations, exchange [one-photon], mass: charm, massless: quark, one-photon: exchange, transverse momentum [spectrum], quark: photoproduction, charm: mass, structure function [photon], DESY HERA Stor, rapidity spectrum, quark [photoproduction], mass [charm], transverse momentum: spectrum, one-photon [exchange], 115-275 GeV-cms (photon p), charm [mass], quark [electroproduction], spectrum [transverse momentum], inclusive reaction [electron p], quark [massless], exchange: one-photon
Abstract: 11 pp. (1995)., The next-to-leading order inclusive cross section for large- p ⊥ photoproduction of charm quarks at HERA is calculated in two different approaches. In the first approach the charm quarks are treated as massive objects which are strictly external to the proton and the photon while in the second approach the charm mass is neglected and the c quark is assumed to be one of the active flavours in the proton and photon structure functions. We present single-inclusive distributions in transverse momentum and rapidity including direct and resolved photons. The cross section in the massless approach is found to be significantly larger than in the massive scheme. The deviation originates from several contributions which are disentangled. We argue that large- p ⊥ photoproduction of charm quarks at HERA will be sensitive to the charm content of the photon structure function.
Published: 1995
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10. A Study of Leading Neutrons in $\gamma p$ Collisions at HERA

Author: Brkic, M
Subjects: n: leading particle, (n) [energy spectrum], electron p [deep inelastic scattering], zero-degree calorimeter, small-angle: production, nondiffractive, Nuclear Theory, diffraction, energy spectrum: (n), n [photoproduction], photon pi [interaction], photoproduction: n, deep inelastic scattering: electron p, interaction: photon pi, production: small-angle, energy spectrum [(n)], Nuclear Experiment, total cross section, colliding beams [electron p], photon pi: interaction, thesis, associated production [rho(770)], interaction [photon pi], small-angle [production], electron p [colliding beams], colliding beams: electron p, DESY HERA Stor, electron p: colliding beams, rho(770): associated production, production [small-angle], Particle Physics - Experiment, electron p: deep inelastic scattering, leading particle [n], associated production: rho(770), 296 GeV-cms, (n): energy spectrum, n: photoproduction, rho(770) [associated production], inclusive reaction [photon p], spectrum: transverse momentum, bibliography, ZEUS, transverse momentum [spectrum], rapidity spectrum, transverse momentum: spectrum, deep inelastic scattering [electron p], High Energy Physics::Experiment, photoproduction [n], spectrum [transverse momentum], photon p: inclusive reaction, experimental results
Abstract: University of Toronto, Diss., 1995; 101 pp. (1995). = University of Toronto, Diss., 1995, High energy (E > 400 GeV) leading neutrons were observed for the first time in electron-proton (ep) collisions, in the data collected in 1993 with the ZEUS detector at the HERA collider. This was done using the lest Forward Neutron Calorimeter (FNC). In this thesis, first, the ZEUS detector setup is described, including a detailed description of the FNC, its insitu calibration and the detemination of its acceptance. At an ep collider photon-proton physics (photoproduction) can also be studied using the almost real photons emitied by the electron beam. With the FNC, leading neutron physics was studied using the ZEUS photoproduction data sample, at an average $\gamma p$ center of mass energy of 180 GeV. The first results are presented here, including the inclusive neutron spectrum. The characteristics of events conlaining such leading neutrons in photoproduction are discussed and compared to the overall photoproduction sample. The One Pion Exchange model from hadron-hadron collisions was found to be consistent with the presented data. The total photon-pion cross section was measured using the FNC to tag an almost real pion beam. It was found to be $\sigma_{\gamma \pi}$ (90 GeV) = 92 $\pm$ 5 (stat.) ± 28 (syst.) $\mu b$. The inclusive transverse momentum ($P_T$) distributions of charged particles in photoproduclion are also presented for non-diffractive events, the diffractive events in two bins of the diffractmg mass, äs well äs for the non-diffractive leading neutron tagged events. The results are discussed and compared to the previous photoproduction and hadron-hadron data.
Published: 1995
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11. Exclusive $\rho^0$ production in deep inelastic electron - proton scattering at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckart, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Hilger, E., Jakob, H. P., Katz, U. F., Mari, S. M., Mengel, S., Mollen, J., Paul, E., Pfeiffer, M., Rembser, C., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, Helen F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jelen, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarebska, E., Suszycki, L., Zajac, J., Kotanski, A., Przybycien, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasinski, M., Gilkinson, D. J., Glasman, C., Gottlicher, P., Grosse-Knetter, J., Gutjahr, B., Haas, Tobias M., Hain, W., Hasell, D., Hessling, H., Iga, Y., Johnson, K., Joos, P., Kasemann, M., Klanner, R., Koch, W., Kopke, L., Kotz, U., Kowalski, H., Labs, J., Ladage, A., Lohr, B., Lowe, M., Luke, D., Mainusch, J., Manczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldan, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voss, T., Westphal, D., Wolf, G., Youngman, C., Zeuner, W., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Soldner-Rembold, S., Schroder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, I., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Brummer, N., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernandez, J. M., Hervas, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Troconiz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C., Patel, P. M., Sinclair, L. E., Stairs, D. G., St. Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagian, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu. A., Kobrin, V. D. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, David C., Byrne, A., Cashmore, R. J., Cooper-Sarkar, Amanda M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, William S., Rahn, J. T., Sadrozinski, H. F., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, Gunter, Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bandyopadhyay, D., Benard, F., Brkic, M., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, Cortney R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyzanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wroblewski, A. K., Zakrzewski, Janusz Andrzej, Zarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. P., Frisken, William R., Furutani, K. M., Khakzad, M., Schmidke, W. B., and ZEUS Collaboration
Subjects: electron p [deep inelastic scattering], (pi+ pi-) [mass spectrum], momentum transfer [channel cross section], deep inelastic scattering: electron p, rho(770)0 [electroproduction], electron p: exclusive reaction, channel cross section: energy dependence, colliding beams [electron p], electroproduction [rho(770)0], hadronic decay [rho(770)0], electroproduction: rho(770)0, electron p [colliding beams], energy dependence [channel cross section], exclusive reaction [electron p], colliding beams: electron p, DESY HERA Stor, electron p: colliding beams, rho(770)0: photoproduction, +p+rho%28770%290%22">photon p --> p rho(770)0, (pi+ pi-): mass spectrum, channel cross section: momentum transfer, mass spectrum [(pi+ pi-)], x-dependence [channel cross section], electron p: deep inelastic scattering, perturbation theory [quantum chromodynamics], rho(770)0 [photoproduction], 296 GeV-cms, photoproduction: rho(770)0, +p+rho%28770%290+electron%22">electron p --> p rho(770)0 electron, momentum spectrum [gluon], spectrum: transverse momentum, rho(770)0 [hadronic decay], ddc:530, quantum chromodynamics: perturbation theory, rho(770)0: electroproduction, rho(770)0: hadronic decay, channel cross section: x-dependence, mass spectrum: (pi+ pi-), gluon: momentum spectrum, ZEUS, transverse momentum [spectrum], photoproduction [rho(770)0], transverse momentum: spectrum, deep inelastic scattering [electron p], spectrum [transverse momentum], hadronic decay: rho(770)0, experimental results
Abstract: 17 pp. (1995)., The exclusive production of ϱ 0 mesons in deep inelastic electron-proton scattering has been studied using the ZEUS detector. Cross sections have been measured in the range 7 < Q 2 < 25 GeV 2 for λ ∗ p centre of mass (c.m.) energies 40 to 130 GeV. The λ ∗ p → ϱ 0 p cross section exhibits a Q −(4.2±0.8 −0.5 +1.4 ) dependence and both longitudinally and transversely polarised ϱ 0 's are observed. The λ ∗ p → ϱ 0 p cross section rises strongly with increasing c.m. energy, when compared with NMC data at lower energy, which cannot be explained by production through soft pomeron exchange. The data are compared with perturbative QCD calculations where the rise in the cross section reflects the increase in the gluon density at low x .
Published: 1995
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12. Measurement of $\alpha_s$ from jet rates in deep inelastic scattering at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Bornheim, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Grothe, M., Hartmann, H., Heinloth, K., Hilger, E., Jakob, H. P., Katz, U. F., Mengel, S., Mollen, J., Paul, E., Pfeiffer, M., Rembser, C., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Cottingham, W. N., Dyce, N., Foster, B., George, S., Heath, G. P., Heath, Helen F., Morgado, C. J. S., O'Mara, J. A., Piccioni, D., Roff, D. G., Tapper, R. J., Yoshida, R., Rau, R. R., Arneodo, M., Capua, M., Garfagnini, A., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jelen, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarebska, E., Suszycki, L., Zajac, J., Kotanski, A., Przybycien, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasinski, M., Gilkinson, D. J., Glasman, C., Gottlicher, P., Grosse-Knetter, J., Gutjahr, B., Haas, Tobias M., Hain, W., Hasell, D., Hessling, H., Iga, Y., Johnson, K., Joos, P., Kasemann, M., Klanner, R., Koch, W., Kopke, L., Kotz, U., Kowalski, H., Labs, J., Ladage, A., Lohr, B., Lowe, M., Luke, D., Mainusch, J., Manczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldan, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voss, T., Westphal, D., Wolf, G., Youngman, C., Zeuner, W., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M., Mari, S. M., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., De Pasquale, S., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Soldner-Rembold, S., Schroeder, J., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L., Lohrmann, E., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Brummer, N., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. H. Y., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Cloth, P., Filges, D., An, S. H., Hong, S. M., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Fernandez, J. P., Graciani, R., Hernandez, J. M., Hervas, L., Labarga, L., Martinez, M., del Peso, J., Puga, J., Terron, J., de Troconiz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C., Patel, P. M., Sinclair, L. E., Stairs, D. G., St. Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagian, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Yu. A., Kobrin, V. D. D., Korzhavina, I. A., Kuzmin, V. A., Lukina, O. Yu., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Gilmore, J., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Nylander, P., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, David C., Byrne, A., Cashmore, R. J., Cooper-Sarkar, Amanda M., Devenish, R. C. E., Harnew, N., Lancaster, M., Lindemann, L., McFall, J., Nath, C., Noyes, V. A., Quadt, A., Tickner, J. R., Uijterwaal, H., Walczak, R., Waters, D. S., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Okrasinski, J. R., Whitmore, J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Lockman, William S., Rahn, J. T., Sadrozinski, H. F., Seiden, A., Williams, D. C., Biltzinger, J., Seifert, R. J., Schwarzer, O., Walenta, A. H., Zech, Gunter, Abramowicz, H., Briskin, G., Dagan, S., Handel-Pikielny, C., Levy, A., Fleck, J. I., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bandyopadhyay, D., Benard, F., Brkic, M., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Polenz, S., Sampson, Cortney R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyzanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wroblewski, A. K., Zakrzewski, Janusz Andrzej, Zarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. P., Frisken, William R., Furutani, K. M., Khakzad, M., Schmidke, W. B., and ZEUS Collaboration
Subjects: electron p: deep inelastic scattering, perturbation theory [quantum chromodynamics], electron p [deep inelastic scattering], strong interaction [coupling constant], positron p [deep inelastic scattering], jet: multiplicity, jet [electroproduction], momentum transfer [dependence], 296 GeV-cms, jet: electroproduction, deep inelastic scattering: electron p, strong interaction: coupling constant, positron p [colliding beams], spectrum: transverse momentum, deep inelastic scattering: positron p, ddc:530, deep inelastic scattering [positron p], quantum chromodynamics: perturbation theory, colliding beams [electron p], electroproduction [jet], positron p: deep inelastic scattering, ZEUS, electron p [colliding beams], transverse momentum [spectrum], positron p: colliding beams, electroproduction: jet, colliding beams [positron p], colliding beams: electron p, DESY HERA Stor, electron p: colliding beams, dependence: momentum transfer, colliding beams: positron p, transverse momentum: spectrum, deep inelastic scattering [electron p], spectrum [transverse momentum], coupling constant: strong interaction, multiplicity [jet], coupling constant [strong interaction], experimental results
Abstract: 16 pp. (1995)., Jet production in deep inelastic scattering for 120 < Q 2 < 3600 GeV 2 has been studied using data from an integrated luminosity of 3.2 pb −1 collected with the ZEUS detector at HERA. Jets are identified with the JADE algorithm. A cut on the angular distribution of parton emission in the γ ∗ - parton centre-of-mass system minimises the experimental and theoretical uncertainties in the determination of the jet rates. The jet rates, when compared to O ( α s 2 ) perturbative QCD calculations, allow a precise determination of α s ( Q ) in three Q 2 -intervals. The values are consistent with a running of ifα s ( Q ), as expected from QCD. Extrapolating to Q = M Z 0 α s ( M Z 0 ) = 0.117 ± 0.005 (stat) −0.005 +0.004 (syst exp ) ± 0.007 (syst theory ).
Published: 1995
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13. Inclusive transverse momentum distributions of charged particles in diffractive and non-diffractive photoproduction at HERA

Author: Derrick, M., Krakauer, D., Magill, S., Mikunas, D., Musgrave, B., Repond, J., Stanek, R., Talaga, R. L., Zhang, H., Ayad, R., Bari, G., Basile, M., Bellagamba, L., Boscherini, D., Bruni, A., Bruni, G., Bruni, P., Cara Romeo, G., Castellini, G., Chiarini, M., Cifarelli, L., Cindolo, F., Contin, A., Corradi, M., Gialas, I., Giusti, P., Iacobucci, G., Laurenti, G., Levi, G., Margotti, A., Massam, T., Nania, R., Nemoz, C., Palmonari, F., Polini, A., Sartorelli, G., Timellini, R., Zamora Garcia, Y., Zichichi, A., Bargende, A., Crittenden, J., Desch, K., Diekmann, B., Doeker, T., Eckert, M., Feld, L., Frey, A., Geerts, M., Geitz, G., Grothe, M., Haas, Tobias M., Hartmann, H., Haun, D., Heinloth, K., Hilger, E., Jakob, H. P., Katz, U. F., Mari, S. M., Mass, A., Mengel, S., Mollen, J., Paul, E., Rembser, C., Schattevoy, R., Schramm, D., Stamm, J., Wedemeyer, R., Campbell-Robson, S., Cassidy, A., Dyce, N., Foster, B., George, S., Gilmore, R., Heath, G. P., Heath, Helen F., Llewellyn, T. J., Morgado, C. J. S., Norman, D. J. P., O'Mara, J. A., Tapper, R. J., Wilson, S. S., Yoshida, R., Rau, R. R., Arneodo, M., Iannotti, L., Schioppa, M., Susinno, G., Bernstein, A., Caldwell, A., Cartiglia, N., Parsons, J. A., Ritz, S., Sciulli, F., Straub, P. B., Wai, L., Yang, S., Zhu, Q., Borzemski, P., Chwastowski, J., Eskreys, A., Piotrzkowski, K., Zachara, M., Zawiejski, L., Adamczyk, L., Bednarek, B., Jelen, K., Kisielewska, D., Kowalski, T., Rulikowska-Zarebska, E., Suszycki, L., Zajac, J., Kotanski, A., Przybycien, M., Bauerdick, L. A. T., Behrens, U., Beier, H., Bienlein, J. K., Coldewey, C., Deppe, O., Desler, K., Drews, G., Flasinski, M., Gilkinson, D. J., Glasman, C., Gottlicher, P., Grosse-Knetter, J., Gutjahr, B., Hain, W., Hasell, D., Hessling, H., Iga, Y., Joos, P., Kasemann, M., Klanner, R., Koch, W., Koepke, L., Kotz, U., Kowalski, H., Labs, J., Ladage, A., Lohr, B., Loewe, M., Luke, D., Manczak, O., Monteiro, T., Ng, J. S. T., Nickel, S., Notz, D., Ohrenberg, K., Roco, M., Rohde, M., Roldan, J., Schneekloth, U., Schulz, W., Selonke, F., Stiliaris, E., Surrow, B., Voss, T., Westphal, D., Wolf, G., Youngman, C., Zhou, J. F., Grabosch, H. J., Kharchilava, A., Leich, A., Mattingly, M. C. K., Meyer, A., Schlenstedt, S., Wulff, N., Barbagli, G., Pelfer, P., Anzivino, G., Maccarrone, G., Votano, L., Bamberger, A., Eisenhardt, S., Freidhof, A., Soldner-Rembold, S., Schroder, J., Theisen, G., Trefzger, T., Brook, N. H., Bussey, P. J., Doyle, A. T., Fleck, I., Saxon, D. H., Utley, M. L., Wilson, A. S., Dannemann, A., Holm, U., Horstmann, D., Neumann, T., Sinkus, R., Wick, K., Badura, E., Burow, B. D., Hagge, L. A., Lohrmann, E., Mainusch, J., Milewski, J., Nakahata, M., Pavel, N., Poelz, G., Schott, W., Zetsche, F., Bacon, T. C., Butterworth, I., Gallo, E., Harris, V. L., Hung, B. H., Long, K. R., Miller, D. B., Morawitz, P. P. O., Prinias, A., Sedgbeer, J. K., Whitfield, A. F., Mallik, U., McCliment, E., Wang, M. Z., Wang, S. M., Wu, J. T., Zhang, Y., Cloth, P., Filges, D., An, S. H., Hong, S. M., Kim, T. Y., Nam, S. W., Park, S. K., Suh, M. H., Yon, S. H., Imlay, R., Kartik, S., Kim, H. J., McNeil, R. R., Metcalf, W., Nadendla, V. K., Barreiro, F., Cases, G., Graciani, R., Hernandez, J. M., Hervas, L., Labarga, L., del Peso, J., Puga, J., Terron, J., de Troconiz, J. F., Smith, G. R., Corriveau, F., Hanna, D. S., Hartmann, J., Hung, L. W., Lim, J. N., Matthews, C. G., Patel, P. M., Sinclair, L. E., Stairs, D. G., St. Laurent, M., Ullmann, R., Zacek, G., Bashkirov, V., Dolgoshein, B. A., Stifutkin, A., Bashindzhagian, G. L., Ermolov, P. F., Gladilin, L. K., Golubkov, Y. A., Kobrin, V. D. D., Kuzmin, V. A., Proskuryakov, A. S., Savin, A. A., Shcheglova, L. M., Solomin, A. N., Zotov, N. P., Botje, M., Chlebana, F., Dake, A., Engelen, J., de Kamps, M., Kooijman, P., Kruse, A., Tiecke, H., Verkerke, W., Vreeswijk, M., Wiggers, L., de Wolf, E., van Woudenberg, R., Acosta, D., Bylsma, B., Durkin, L. S., Honscheid, K., Li, C., Ling, T. Y., McLean, K. W., Murray, W. N., Park, I. H., Romanowski, T. A., Seidlein, R., Bailey, D. S., Blair, G. A., Byrne, A., Cashmore, R. J., Cooper-Sarkar, Amanda M., Daniels, D., Devenish, R. C. E., Harnew, N., Lancaster, M., Luffman, P. E., Lindemann, L., McFall, J., Nath, C., Noyes, V. A., Quadt, A., Uijterwaal, H., Walczak, R., Wilson, F. F., Yip, T., Abbiendi, G., Bertolin, A., Brugnera, R., Carlin, R., Dal Corso, F., De Giorgi, M., Dosselli, U., Limentani, S., Morandin, M., Posocco, M., Stanco, L., Stroili, R., Voci, C., Bulmahn, J., Butterworth, J. M., Feild, R. G., Oh, B. Y., Whitmore, J. J., D'Agostini, G., Marini, G., Nigro, A., Tassi, E., Hart, J. C., McCubbin, N. A., Prytz, K., Shah, T. P., Short, T. L., Barberis, E., Dubbs, T., Heusch, C., Van Hook, M., Hubbard, B., Lockman, William S., Rahn, J. T., Sadrozinski, H. F. W., Seiden, A., Biltzinger, J., Seifert, R. J., Walenta, A. H., Zech, Gunter, Abramowicz, H., Briskin, G., Dagan, S., Levy, A., Hasegawa, T., Hazumi, M., Ishii, T., Kuze, M., Mine, S., Nagasawa, Y., Nakao, M., Suzuki, I., Tokushuku, K., Yamada, S., Yamazaki, Y., Chiba, M., Hamatsu, R., Hirose, T., Homma, K., Kitamura, S., Nakamitsu, Y., Yamauchi, K., Cirio, R., Costa, M., Ferrero, M. I., Lamberti, L., Maselli, S., Peroni, C., Sacchi, R., Solano, A., Staiano, A., Dardo, M., Bailey, David C., Bandyopadhyay, D., Benard, F., Brkic, M., Crombie, M. B., Gingrich, D. M., Hartner, G. F., Joo, K. K., Levman, G. M., Martin, J. F., Orr, R. S., Sampson, Cortney R., Teuscher, R. J., Catterall, C. D., Jones, T. W., Kaziewicz, P. B., Lane, J. B., Saunders, R. L., Shulman, J., Blankenship, K., Lu, B., Mo, L. W., Bogusz, W., Charchula, K., Ciborowski, J., Gajewski, J., Grzelak, G., Kasprzak, M., Krzyzanowski, M., Muchorowski, K., Nowak, R. J., Pawlak, J. M., Tymieniecka, T., Wroblewski, A. K., Zakrzewski, Janusz Andrzej, Zarnecki, A. F., Adamus, M., Eisenberg, Y., Karshon, U., Revel, D., Zer-Zion, D., Ali, I., Badgett, W. F., Behrens, B., Dasu, S., Fordham, C., Foudas, C., Goussiou, A., Loveless, R. J., Reeder, D. D., Silverstein, S., Smith, W. H., Vaiciulis, A., Wodarczyk, M., Tsurugai, T., Bhadra, S., Cardy, M. L., Fagerstroem, C. P., Frisken, William R., Furutani, K. M., Khakzad, M., Schmidke, W. B., and ZEUS Collaboration
Subjects: perturbation theory [quantum chromodynamics], DESY DESY HERA Stor Stor, charged particle [photoproduction], nondiffractive, electron p: inclusive reaction, diffraction, ZEUS, electron p [colliding beams], transverse momentum [spectrum], charged particle: photoproduction, 296 GeV-cms, colliding beams: electron p, electron p: colliding beams, photoproduction [charged particle], transverse momentum: spectrum, spectrum: transverse momentum, ddc:530, spectrum [transverse momentum], quantum chromodynamics: perturbation theory, inclusive reaction [electron p], photoproduction: charged particle, colliding beams [electron p], experimental results
Abstract: 18 pp. (1995)., Inclusive transverse momentum spectra of charged particles in photoproduction events in the laboratory pseudorapidity range $-1.2
Published: 1995
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14. Diffractive photoproduction of jets with a direct pomeron coupling at HERA

Author: Kniehl, Bernd A., Kohrs, H. G., and Kramer, G.
Subjects: structure function: pomeron, pomeron: exchange, jet: photoproduction, effective Lagrangian, interpretation of experiments: DESY HERA Stor, electron p: inclusive reaction, diffraction, one-photon: exchange, (2jet): final state, (quark pomeron): coupling, model: parton, electroproduction: jet, final state: (2jet), jet: electroproduction, exchange: pomeron, rapidity spectrum, coupling: (quark pomeron), photoproduction: jet, transverse momentum: spectrum, spectrum: transverse momentum, photon p: inclusive reaction, numerical calculations, exchange: one-photon
Abstract: We investigate in detail the effect of a direct pomeron coupling to quarks on the production of jets in $ep$ scattering with almost real photons. Jet production via a direct pomeron coupling is compared with the resolved--pomeron mechanism. We consider both direct and resolved photoproduction. Rapidity and transverse momentum distributions are calculated and compared with preliminary H1 and ZEUS data.
Published: 1995
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15. Untersuchung der Erzeugung schwerer Quarks durch ihren Zerfall in Myonen im H1-Detektor bei HERA

Author: Krueger, Ulrike
Subjects: channel cross section, thesis, electron p: inclusive reaction, momentum spectrum, bibliography, quark: semileptonic decay, 296 GeV-cms, muon: direct production, fusion: boson gluon, colliding beams: electron p, quark: pair production, pair production: quark, DESY HERA Stor, electron p: colliding beams, transverse momentum: spectrum, spectrum: transverse momentum, semileptonic decay: quark, H1, heavy quark, angular distribution, quark: electroproduction, electroproduction: quark, direct production: muon, numerical calculations: Monte Carlo, experimental results
Abstract: 128 pp. (1994).
Published: 1994
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16. Higher-order QCD corrections to inclusive particle production in $p\bar p$ collisions

Author: Borzumati, F. M., Kniehl, B. A., and Kramer, G.
Subjects: hadron: hadroproduction, inclusive reaction [anti-p p], quantum chromodynamics: higher-order, structure function [p], transverse momentum [spectrum], quantum chromodynamics: Lambda parameter, fragmentation function, hadron [hadroproduction], rapidity spectrum, anti-p p: inclusive reaction, transverse momentum: spectrum, spectrum: transverse momentum, hadroproduction: hadron, ddc:530, higher-order [quantum chromodynamics], p: structure function, spectrum [transverse momentum], hadroproduction [hadron], numerical calculations, Lambda parameter [quantum chromodynamics]
Abstract: 28 pp. (1993)., The Selberg trace formula for automorphic forms of weightmεℤ, on bordered Riemann surfaces is developed. The trace formula is formulated for arbitrary Fuchsian groups of the first kind with reflection symmetry which include hyperbolic, elliptic and parabolic conjugacy classes. In the case of compact bordered Riemann surfaces we can explicitly evaluate determinants of Maass-Laplacians for both Dirichlet and Neumann boundary-conditions, respectively. Some implications for the open bosonic string theory are mentioned.
Published: 1993
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17. Inclusive particle production at HERA

Author: Borzumati, F. M., Kniehl, B. A., and Kramer, G.
Subjects: perturbation theory [quantum chromodynamics], electron p: inclusive reaction, hadron [electroproduction], structure function [p], hadron: electroproduction, electroproduction [hadron], hard scattering, 298 GeV, spectrum: transverse momentum, photon: structure function, ddc:530, p: structure function, H1 [interpretation of experiments], quantum chromodynamics: perturbation theory, numerical calculations, correction: higher-order, exchange [one-photon], higher-order [correction], electroproduction: hadron, interpretation of experiments: H1, one-photon: exchange, transverse momentum [spectrum], equivalent photon approximation, structure function [photon], rapidity spectrum, transverse momentum: spectrum, one-photon [exchange], spectrum [transverse momentum], inclusive reaction [electron p], exchange: one-photon
Abstract: 11 pp. (1993)., We calculate in next-to-leading order inclusive cross sections of single-particle production via resolved photons inep collisions at HERA. Transverse-momentum and rapidity distributions are presented and the scale dependence is studied. The results are compared with first experimental data from the H1 Collaboration at HERA.
Published: 1993
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18. WW$\psi$ couplings from single W-production in polarized $e^+ e^−$ collisions

Author: Philipsen, O.
Subjects: annihilation: electron positron, annihilation [electron positron], (2W photon) [coupling], coupling [(2W photon)], 500 GeV-cms, electroproduction: W, angular distribution [(W-)], electron [polarized beam], channel cross section: energy dependence, (W-) [angular distribution], helicity: amplitude analysis, photon electron [interaction], W [electroproduction], energy dependence [channel cross section], equivalent photon approximation, (2W photon): coupling, asymmetry [angular distribution], anomaly [coupling], angular distribution: (W-), asymmetry: angular distribution, (W-) [energy spectrum], SU(2) x U(1) [gauge field theory], electroproduction [W], angular distribution: asymmetry, polarized beam [electron], electron: polarized beam, (W-): energy spectrum, amplitude analysis [helicity], W: electroproduction, (W-): angular distribution, electron positron: annihilation, interaction: photon electron, coupling [anomaly], +W-+neutrino%22">photon electron --> W- neutrino, spectrum: transverse momentum, interaction [photon electron], ddc:530, coupling: anomaly, numerical calculations, energy spectrum: (W-), coupling: (2W photon), electron positron [annihilation], anomaly: coupling, +W-+positron+neutrino%22">electron positron --> W- positron neutrino, transverse momentum [spectrum], transverse momentum: spectrum, gauge field theory: SU(2) x U(1), angular distribution [asymmetry], spectrum [transverse momentum], polarized beam: electron, photon electron: interaction, energy spectrum [(W-)]
Abstract: 25 pp. (1992)., Using the processeψ→Wv we study theWWψ vertex ine+e− collisions with polarized beams at a future 500 GeV collider. The equivalent photon approximation and its accuracy are discussed for the case of polarized electron beams. The resulting photon spectrum is then used to compute the total cross section as well as verious differential distributions for the processe+e−→e+W−v. Special emphasis is put on the effects of using polarized electron beams and their influence on the sensitivity to anomalous couplings.
Published: 1992
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19. Transverse momentum distributions for exclusive $\varrho^{0}$ muoproduction

Author: M. van der Heijden, H. Peschel, M. Treichel, Ralf Kaiser, D. Nowotny, A. Sandacz, U. Krüner, W. Brückner, Chiara Mariotti, P. Amaudruz, M. Botje, Geoffrey Taylor, E. Rondio, F. Zetsche, Amedeo Staiano, L. Fluri, J. Domingo, B. Badelek, R. A. Schumacher, A. Simon, A. Brüll, G. van Middelkoop, J. Nassalski, H. Engelien, M.I. Ferrero, I. G. Bird, Ulrich Landgraf, Michele Arneodo, C. Scholz, J. Beaufays, L. Ropelewski, J. Drinkard, T. Lindqvist, P. Grafström, Q. Ingram, G. Baum, D. von Harrach, K. Röhrich, J. Ciborowski, N. Pavel, H. Döbbeling, M. Siebler, Thomas Walcher, R. van Dantzig, R. Rieger, Y. Mizuno, U. Sennhauser, F. Klein, M. de Jong, B. Povh, K. Janson, S. Kullander, C. Broggini, Cristiana Peroni, Roland Windmolders, A. Arvidson, G. K. Mallot, W. J. Burger, Tjeerd Ketel, B. Korzen, F. Lettenström, T.-A. Shibata, Klaus Rith, F. Sever, J.-L. Vuilleumier, E. M. Kabuß, and C. A. Heusch
Subjects: forward spectrometer: experimental results, Physics and Astronomy (miscellaneous), Nuclear Theory, muon nucleus: nuclear reaction, chemistry.chemical_element, Elementary particle, muon deuteron: nuclear reaction, Nuclear physics, mass spectrum: two-pion, momentum transfer: slope, spectrum: transverse momentum, Field theory (psychology), Quantum field theory, Nuclear Experiment, rho(770)0: electroproduction, Engineering (miscellaneous), muon p: exclusive reaction, Physics, pomeron: exchange, calcium, two-pion: mass spectrum, background, electroproduction: rho(770)0, carbon, 200 GeV, CERN SPS, Deep inelastic scattering, Particle acceleration, exchange: pomeron, chemistry, transverse momentum: spectrum, Quantum electrodynamics, Transverse momentum, High Energy Physics::Experiment, Carbon, Particle Physics - Experiment, +rho%28770%290+nucleon%22">muon p --> rho(770)0 nucleon
Abstract: We have studied transverse momentum distributions for exclusive rho(0) muoproduction on protons and heavier nuclei at 2 < Q2 < 25 GeV2. The Q2 dependence of the slopes of the p(t)2 and t' distributions is discussed. The influence of the non-exclusive background is investigated. The p(t)2-slope for exclusive events is 4.3 +/- 0.6 +/- 0.7 GeV-2 at large Q2. The p(t)2 spectra are much softer than inclusive p(t)2 spectra of leading hadrons produced in deep inelastic scattering.
Published: 1991

20. Studies of multihadronic final states in photon-photon interactions

Author: Behrend, H. J., Criegee, L., Field, J. H., Franke, G., Jung, H., Meyer, J., Podobrin, O., Schroder, V., Winter, G. G., Bussey, P. J., Campbell, A. J., Hendry, D., Lumsdon, S., Skillicorn, I. O., Ahme, J., Blobel, V., Feindt, M., Fenner, H., Harjes, J., Kohne, J., Peters, J. H., Spitzer, H., Weihrich, T., Apel, W. D., Engler, J., Flugge, G., Fries, D. C., Fuster, J., Gamerdinger, K., Grosse-Wiesmann, P., Kuster, H., Muller, H., Ranitzsch, K. H., Schneider, H., de Boer, W., Buschhorn, G., Grindhammer, Guenter, Gunderson, B., Kiesling, Christian M., Kotthaus, R., Kroha, H., Luers, D., Oberlach, H., Schacht, P., Scholz, S., Wiedenmann, W., Davier, M., Grivaz, J. F., Haissinski, J., Journe, V., Le Diberder, F., Veillet, J. J., Blohm, K., George, R., Goldberg, M., Hamon, O., Kapusta, Frederic, Poggioli, L., Rivoal, M., d'Agostini, G., Ferrarotto, F., Iacovacci, M., Shooshtari, G., Stella, B., Cozzika, G., Ducros, Y., Alexander, G., Beck, A., Bella, G., Grunhaus, J., Klatchko, A., Levy, A., Milstene, C., and CELLO Collaboration
Subjects: two-photon [exchange], fragmentation [model], vector dominance, momentum transfer [cross section], jet [electroproduction], interaction [photon photon], photon photon: interaction, jet: electroproduction, cross section: momentum transfer, hadron: multiple production, spectrum: transverse momentum, ddc:530, angular distribution, electron positron [colliding beams], hadron [multiple production], multiple production [hadron], electroproduction [jet], exchange: two-photon, photon photon [interaction], quark model parton, electron positron: colliding beams, transverse momentum [spectrum], ((4, electroproduction: jet, interaction: photon photon, multiple production: hadron, transverse momentum: spectrum, colliding beams: electron positron, model: fragmentation, DESY PETRA Stor, colliding beams [electron positron], two-photon: exchange, CELLO, spectrum [transverse momentum], thrust [jet], jet: thrust, exchange [two-photon], experimental results
Abstract: 24 pp. (1991)., We have measured the cross section and $Q^2$-dependence of the reaction γγ→ multihadrons, using the CELLO detector at DESY, for visible final-state masses between 4 and 9 GeV. The data are well fitted by an incoherent sum of Generalised Vector Meson Dominance and Quark Parton Model terms, but at lowQ2 require the addition of a third component which resembles the QPM but is less two-jet-like. With and without this term, the GVDM cross section atQ2=0 is found to be 200±20 and 250±25 nb, respectively.
Published: 1991
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21. Determination of $\alpha_s$ in First and Second Order {QCD} From $e^+ e^-$ Annihilation Into Hadrons

Author: Althoff, M., Braunschweig, W., Eisenmann, J., Takashima, M., Venkataramania, H., Wicklund, E., Wu, Sau Lan, Zobernig, G., TASSO Collaboration, Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Kopke, L., Kolanoski, H., Kuck, H., Mertens, V., Wedemeyer, R., Kirschfink, F. J., Eskreys, A., Gather, K., Hultschig, H., Joos, P., Kotz, U., Kowalski, H., Ladage, A., Lohr, B., Luke, D., Mattig, Peter, Lubelsmeyer, K., Notz, D., Nowak, R. J., Pyrlik, J., Rushton, M., Schutte, W., Trines, D., Tymieniecka, T., Wolf, G., Yekutieli, G., Xiao, C., Martyn, H. U., Fohrmann, R., Hilger, E., Kracht, T., Krasemann, H. L., Leu, P., Lohrmann, E., Pandoulas, D., Poelz, G., Posnecker, K. U., Wiik, B. H., Rosskamp, P., Beuselinck, R., Binnie, D. M., Dornan, P. J., Foster, B., Garbutt, D. A., Jenkins, Colin, Jones, T. D., Jones, W. G., McCardle, J., Sedgbeer, J. K., Sander, H. G., Thomas, J., Wan Abdullah, W. A. T., Bell, Kenneth Watson, Bowler, M. G., Bull, P., Cashmore, R. J., Clarke, P. E. L., Devenish, R., Grossmann, P., Hawkes, C. M., Schmitz, D., Lloyd, S. L., Youngman, C., Forden, G. E., Hart, J. C., Harvey, J., Hasell, D. K., Saxon, D. H., Barreiro, F., Brandt, S., Dittmar, M., Siebke, H., Holder, M., Kreutz, G., Neumann, B., Duchovni, E., Eisenberg, Y., Karshon, U., Mikenberg, G., Mir, R., Revel, D., Ronat, E., Wallraff, W., Shapira, A., Winik, M., Baranko, G., Barklow, T., Caldwell, A., Cherney, Michael G., Izen, J. M., Mermikides, M., Rudolph, G., and Strom, David M.
Subjects: JET [MASS], DESY PETRA STOR, BIBLIOGRAPHY, THRUST [EVENT SHAPE ANALYSIS], HADRON: ELECTROPRODUCTION, MULTIPLE PRODUCTION: HADRON, ELECTROPRODUCTION [HADRON], JET [GLUON], TASSO, ELECTROPRODUCTION: HADRON, EVENT SHAPE ANALYSIS: THRUST, CORRELATION [ENERGY], HADRON [ELECTROPRODUCTION], MASS [JET], JET [ELECTROPRODUCTION], MULTIDIMENSIONAL ANALYSIS: CLUSTER, ELECTROPRODUCTION: JET, COLLIDING BEAMS [ELECTRON POSITRON], HADRON [MULTIPLE PRODUCTION], PARAMETRIZATION [DIFFERENTIAL CROSS SECTION], ANNIHILATION: ELECTRON POSITRON, ELECTRON POSITRON: COLLIDING BEAMS, ENERGY: CORRELATION, ELECTRON POSITRON [ANNIHILATION], JET: MASS, 33.0-36.6 GEV-CMS, ANNIHILATION [ELECTRON POSITRON], PERTURBATION THEORY [QUANTUM CHROMODYNAMICS], ELECTROPRODUCTION [JET], ASYMMETRY, SPECTRUM: TRANSVERSE MOMENTUM, TRANSVERSE MOMENTUM: SPECTRUM, FRAGMENTATION [MODEL], MULTIPLE PRODUCTION [HADRON], MASS: JET, COUPLING CONSTANT [STRONG INTERACTION], DIFFERENTIAL CROSS SECTION: PARAMETRIZATION, DIFFERENTIAL CROSS SECTION [PARAMETRIZATION], COUPLING CONSTANT: STRONG INTERACTION, CLUSTER [MULTIDIMENSIONAL ANALYSIS], GLUON: JET, STRONG INTERACTION [COUPLING CONSTANT], COLLIDING BEAMS: ELECTRON POSITRON, EXPERIMENTAL RESULTS, SPECTRUM [TRANSVERSE MOMENTUM], JET: ELECTROPRODUCTION, QUANTUM CHROMODYNAMICS: PERTURBATION THEORY, HADRON: MULTIPLE PRODUCTION, ELECTRON POSITRON [COLLIDING BEAMS], MODEL: FRAGMENTATION, TRANSVERSE MOMENTUM [SPECTRUM], STRONG INTERACTION: COUPLING CONSTANT, PARAMETRIZATION: DIFFERENTIAL CROSS SECTION, ELECTRON POSITRON: ANNIHILATION
Abstract: 60 pp. (1984).
Published: 1984
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22. SELECTED TOPICS ON e+ e- PHYSICS

Author: Wolf, Guenter E.
Subjects: SPECTRUM [LONGITUDINAL MOMENTUM], TAU [ELECTROPRODUCTION], J/PSI(3100): ELECTROPRODUCTION, PSI MESONS, ELECTROPRODUCTION [J/PSI(3100)], BIBLIOGRAPHY, (3JET): FINAL STATE, HADRON: ELECTROPRODUCTION, LONGITUDINAL MOMENTUM [SPECTRUM], ELECTROPRODUCTION [HADRON], ONE-PHOTON [EXCHANGE], QUANTUM ELECTRODYNAMICS: VALIDITY TEST, UPSILON MESONS, TOP [SEARCH FOR], FORM FACTOR: HADRON, ELECTROPRODUCTION: HADRON, HADRON [ELECTROPRODUCTION], LECTURES: EXPERIMENTAL RESULTS, JET [ELECTROPRODUCTION], FINAL STATE: (3JET), ELECTROPRODUCTION: JET, SPECTRUM: LONGITUDINAL MOMENTUM, COLLIDING BEAMS [ELECTRON POSITRON], STORAGE RING [ELECTRON POSITRON], HADRON [FORM FACTOR], ANNIHILATION: ELECTRON POSITRON, ELECTROPRODUCTION: J/PSI(3100), EXPERIMENTAL RESULTS: LECTURES, ELECTRON POSITRON: COLLIDING BEAMS, RATIO [TOTAL CROSS SECTION], FINAL STATE [(3JET)], ELECTRON POSITRON: STORAGE RING, ELECTRON POSITRON [ANNIHILATION], ELECTROPRODUCTION [PSI(3700)], ANNIHILATION [ELECTRON POSITRON], EXCHANGE [ONE-PHOTON], ELECTROPRODUCTION [JET], SPECTRUM: TRANSVERSE MOMENTUM, EXPERIMENTAL RESULTS [LECTURES], J/PSI(3100) [ELECTROPRODUCTION], TRANSVERSE MOMENTUM: SPECTRUM, LECTURES [EXPERIMENTAL RESULTS], FORM FACTOR [HADRON], CHARMED PARTICLE, TAU: ELECTROPRODUCTION, RATIO: TOTAL CROSS SECTION, PSI(3700): ELECTROPRODUCTION, top, TOTAL CROSS SECTION [RATIO], (3JET) [FINAL STATE], HADRON: FORM FACTOR, CHARMONIUM, ELECTROPRODUCTION: TAU, TOTAL CROSS SECTION: RATIO, COLLIDING BEAMS: ELECTRON POSITRON, ELECTROPRODUCTION [TAU], SPECTRUM [TRANSVERSE MOMENTUM], JET: ELECTROPRODUCTION, ONE-PHOTON: EXCHANGE, ELECTROPRODUCTION: PSI(3700), VALIDITY TEST [QUANTUM ELECTRODYNAMICS], MODEL: QUARK PARTON, ELECTRON POSITRON [COLLIDING BEAMS], EXCHANGE: ONE-PHOTON, QUARK PARTON [MODEL], SEARCH FOR: TOP, TRANSVERSE MOMENTUM [SPECTRUM], PSI(3700) [ELECTROPRODUCTION], LONGITUDINAL MOMENTUM: SPECTRUM, ELECTRON POSITRON: ANNIHILATION
Abstract: 182 pp. (1980).
Published: 1980
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23. HIGH-ENERGY e+ e- INTERACTIONS

Author: Wolf, Guenter
Subjects: ELECTROPRODUCTION: LAMBDA, VALIDITY TEST [QUANTUM CHROMODYNAMICS], EXCITED ELECTRON: MASS, DIFFERENTIAL CROSS SECTION: X-DEPENDENCE, GLUON: BREMSSTRAHLUNG, LEPTON [ELECTROPRODUCTION], PHOTON: PAIR PRODUCTION, +MUON%2B+MUON%22">ELECTRON POSITRON --> MUON+ MUON, MASS [LOWER LIMIT], DESY PETRA STOR, SEARCH FOR [HEAVY LEPTON], EXCITED MUON: MASS, LOWER LIMIT [MASS], ANGULAR DEPENDENCE [DIFFERENTIAL CROSS SECTION], SPECTRUM [INCLUSIVE REACTION], QUANTUM ELECTRODYNAMICS: VALIDITY TEST, DIFFERENTIAL CROSS SECTION: SCALING, ENERGY DEPENDENCE: TOTAL CROSS SECTION, TAU: PAIR PRODUCTION, MOMENTUM: DIFFERENTIAL CROSS SECTION, K: ELECTROPRODUCTION, EXCITED ELECTRON [MASS], SUPERSYMMETRY [POSTULATED PARTICLE], LEPTON: ELECTROPRODUCTION, ENERGY LOSS: SPECTRUM, CHARGED PARTICLE: MULTIPLICITY, TOTAL CROSS SECTION: ENERGY DEPENDENCE, ELECTROPRODUCTION [K], ENERGY DEPENDENCE [TOTAL CROSS SECTION], PAIR PRODUCTION: TAU, PI: ELECTROPRODUCTION, ANNIHILATION: ELECTRON POSITRON, PAIR PRODUCTION [TAU], JET: SPHERICITY, RAPIDITY [SPECTRUM], SPHERICITY [JET], FINAL STATE [(3JET)], DALITZ PLOT [MULTIDIMENSIONAL ANALYSIS], ELECTRON POSITRON [ELASTIC SCATTERING], +ANTI-K0+ANYTHING%22">ELECTRON POSITRON --> ANTI-K0 ANYTHING, ELECTRON POSITRON [ANNIHILATION], ELECTROPRODUCTION: P, FRAGMENTATION [GLUON], ELECTROPRODUCTION: K, ELASTIC SCATTERING [ELECTRON POSITRON], ANNIHILATION [ELECTRON POSITRON], EXCHANGE [ONE-PHOTON], MASS: EXCITED MUON, QUARK: FRAGMENTATION, X-DEPENDENCE [DIFFERENTIAL CROSS SECTION], TRANSVERSE MOMENTUM: SPECTRUM, MULTIPLE PRODUCTION [HADRON], EXCITED MUON [MASS], NEUTRAL CURRENT, ELECTROPRODUCTION [PI], EXCITED LEPTON [SEARCH FOR], X-DEPENDENCE: DIFFERENTIAL CROSS SECTION, TAU: LIFETIME, (3JET) [FINAL STATE], DIFFERENTIAL CROSS SECTION: ASYMMETRY, MASS SPECTRUM: (MUON PHOTON), COUPLING CONSTANT: STRONG INTERACTION, LAMBDA [ELECTROPRODUCTION], ASYMMETRY: DIFFERENTIAL CROSS SECTION, STRONG INTERACTION [COUPLING CONSTANT], COLLIDING BEAMS: ELECTRON POSITRON, SCALING [DIFFERENTIAL CROSS SECTION], +K0+ANYTHING%22">ELECTRON POSITRON --> K0 ANYTHING, GLUON: FRAGMENTATION, +LAMBDA+ANYTHING%22">ELECTRON POSITRON --> LAMBDA ANYTHING, DIFFERENTIAL CROSS SECTION [SCALING], JET: ELECTROPRODUCTION, ONE-PHOTON: EXCHANGE, DIFFERENTIAL CROSS SECTION [X-DEPENDENCE], (MUON PHOTON): MASS SPECTRUM, SPECTRUM [RAPIDITY], INCLUSIVE REACTION: SPECTRUM, VALIDITY TEST [QUANTUM ELECTRODYNAMICS], SPECTRUM: INCLUSIVE REACTION, ELECTRON POSITRON [COLLIDING BEAMS], EXCHANGE: ONE-PHOTON, +TAU%2B+TAU%22">ELECTRON POSITRON --> TAU+ TAU, DIFFERENTIAL CROSS SECTION: ANGULAR DEPENDENCE, STRONG INTERACTION: COUPLING CONSTANT, MUON [PAIR PRODUCTION], DIFFERENTIAL CROSS SECTION [ASYMMETRY], LAMBDA: ELECTROPRODUCTION, RAPIDITY: SPECTRUM, +ANTILAMBDA+ANYTHING%22">ELECTRON POSITRON --> ANTILAMBDA ANYTHING, P [ELECTROPRODUCTION], ENERGY DEPENDENCE [CHANNEL CROSS SECTION], ELECTRON POSITRON: ANNIHILATION, LOWER LIMIT: MASS, PAIR PRODUCTION [MUON], ENERGY LOSS [SPECTRUM], MASS: EXCITED ELECTRON, FRAGMENTATION [QUARK], EXCHANGE: Z0, DIFFERENTIAL CROSS SECTION [MOMENTUM], EXPERIMENTAL RESULTS [REVIEW], BIBLIOGRAPHY, (3JET): FINAL STATE, ELECTROPRODUCTION [P], MULTIPLE PRODUCTION: HADRON, ELECTROPRODUCTION: PI, DIFFERENTIAL CROSS SECTION: MOMENTUM, ONE-PHOTON [EXCHANGE], +2PHOTON%22">ELECTRON POSITRON --> 2PHOTON, INCLUSIVE REACTION [SPECTRUM], PI [ELECTROPRODUCTION], QUARK: SEARCH FOR, GLUON [SPIN], THRUST [JET], ELECTROPRODUCTION [LAMBDA], JET: THRUST, GLUON [BREMSSTRAHLUNG], SPIN: GLUON, EXCHANGE [Z0], JET [ELECTROPRODUCTION], FINAL STATE: (3JET), SEARCH FOR [QUARK], ELECTRON POSITRON: INCLUSIVE REACTION, ELECTROPRODUCTION: JET, COLLIDING BEAMS [ELECTRON POSITRON], HADRON [MULTIPLE PRODUCTION], Weinberg angle, MULTIPLICITY [CHARGED PARTICLE], MOMENTUM [DIFFERENTIAL CROSS SECTION], ANGULAR DEPENDENCE: DIFFERENTIAL CROSS SECTION, ELECTRON POSITRON: COLLIDING BEAMS, RATIO [TOTAL CROSS SECTION], REVIEW: EXPERIMENTAL RESULTS, ELASTIC SCATTERING: ELECTRON POSITRON, PHOTON [PAIR PRODUCTION], MASS: LOWER LIMIT, QUANTUM CHROMODYNAMICS: VALIDITY TEST, ELECTROPRODUCTION [JET], SPECTRUM: ENERGY LOSS, MULTIDIMENSIONAL ANALYSIS: DALITZ PLOT, SPECTRUM: TRANSVERSE MOMENTUM, MASS SPECTRUM [(MUON PHOTON)], PAIR PRODUCTION: PHOTON, SPECTRUM [ENERGY LOSS], SPIN [GLUON], POSTULATED PARTICLE: SUPERSYMMETRY, Z0 [EXCHANGE], BREMSSTRAHLUNG: GLUON, RADIATIVE CORRECTION, DIFFERENTIAL CROSS SECTION [ANGULAR DEPENDENCE], RATIO: TOTAL CROSS SECTION, LECTURES, LIFETIME [TAU], TOTAL CROSS SECTION [RATIO], MASS [EXCITED ELECTRON], COUPLING CONSTANT [STRONG INTERACTION], ELECTRON POSITRON: ELASTIC SCATTERING, MUON: PAIR PRODUCTION, CHANNEL CROSS SECTION: ENERGY DEPENDENCE, BREMSSTRAHLUNG [GLUON], TAU [PAIR PRODUCTION], P: ELECTROPRODUCTION, TOTAL CROSS SECTION [ENERGY DEPENDENCE], TOTAL CROSS SECTION: RATIO, ELECTROPRODUCTION: LEPTON, GLUON: SPIN, MASS [EXCITED MUON], SPECTRUM [TRANSVERSE MOMENTUM], MODEL: QUARK PARTON, HADRON: MULTIPLE PRODUCTION, PAIR PRODUCTION: MUON, INCLUSIVE REACTION [ELECTRON POSITRON], (MUON PHOTON) [MASS SPECTRUM], SEARCH FOR: EXCITED LEPTON, ELECTROPRODUCTION [LEPTON], PAIR PRODUCTION [PHOTON], QUARK PARTON [MODEL], Z0: EXCHANGE, SCALING: DIFFERENTIAL CROSS SECTION, TRANSVERSE MOMENTUM [SPECTRUM], 27.4-36.7 GEV-CMS, HEAVY LEPTON: SEARCH FOR, K [ELECTROPRODUCTION], SPECTRUM: RAPIDITY, ASYMMETRY [DIFFERENTIAL CROSS SECTION]
Abstract: 107 pp. (1981).
Published: 1981
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24. QUARK FRAGMENTATION IN e+ e- JETS

Author: Mattig, Peter
Subjects: DIFFERENTIAL CROSS SECTION: X-DEPENDENCE, FRAGMENTATION [QUARK], DESY PETRA STOR, TALK, X-DEPENDENCE: DIFFERENTIAL CROSS SECTION, JET: RAPIDITY, CORRELATION [MULTIPLICITY], TASSO, COLLIDING BEAMS: ELECTRON POSITRON, EXPERIMENTAL RESULTS, CHARGED PARTICLE: MULTIPLICITY, SPECTRUM [TRANSVERSE MOMENTUM], 22: 34 GEV-CMS [14], KNO [SCALING], JET: ELECTROPRODUCTION, DIFFERENTIAL CROSS SECTION [X-DEPENDENCE], JET [ELECTROPRODUCTION], ELECTRON POSITRON: INCLUSIVE REACTION, ELECTROPRODUCTION: JET, COLLIDING BEAMS [ELECTRON POSITRON], MULTIPLICITY: CORRELATION, SCALING: KNO, MULTIPLICITY [CHARGED PARTICLE], ANNIHILATION: ELECTRON POSITRON, JET: SPHERICITY, ELECTRON POSITRON [COLLIDING BEAMS], INCLUSIVE REACTION [ELECTRON POSITRON], ELECTRON POSITRON: COLLIDING BEAMS, SPHERICITY [JET], ELECTRON POSITRON [ANNIHILATION], TRANSVERSE MOMENTUM [SPECTRUM], 14: 22: 34 GEV-CMS, ANNIHILATION [ELECTRON POSITRON], RAPIDITY [JET], ELECTROPRODUCTION [JET], SPECTRUM: TRANSVERSE MOMENTUM, QUARK: FRAGMENTATION, X-DEPENDENCE [DIFFERENTIAL CROSS SECTION], TRANSVERSE MOMENTUM: SPECTRUM, ELECTRON POSITRON: ANNIHILATION
Abstract: 19 pp. (1983).
Published: 1983
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25. Experimental Study of Inclusive Muon Spectra at PETRA

Author: Adeva, B., Barber, D. P., Chang, C. C., Chen, H. S., Chen, M., Chen, M. L., Chen, M. Y., Chu, Y. S., Clare, R., Deffur, E., Demarteau, M., Duinker, P., Becker, U., Feng, Z. Y., Fesefeldt, H. S., Fong, D., Fukushima, M., Harting, D., Hebbeker, T., Herten, G., Ho, M. C., Ilyas, M. M., Jiang, D. Z., Berdugo, J., Krenz, W., Kuijer, P., Li, Q. Z., Luckey, David, Luit, E. J., Mana, C., Marquina, M. A., Massaro, G. G. G., Mount, R., Newman, H., Berghoff, G., Pohl, M., Poschmann, F. P., Rau, R. R., Revol, J. P., Rodriguez, S., Rohde, M., Rubio, J. A., Rykaczewski, H., Salicio, J., Schulz, I., Bohm, A., Sinram, K., Steuer, M., Swider, G. M., Tang, H. W., Teuchert, D., Ting, Samuel C. C., Tung, K. L., Wang, M. Q., White, M., Wu, H. G., Branson, J. G., Wu, S. X., Wyslouch, B., Zhou, B., Zhu, R. Y., Zhu, Y. C., Aachen-DESY-Annecy, Burger, J. D., Capell, M., and Cerrada, M.
Subjects: BRANCHING RATIO [BOTTOM PARTICLE], MUON [ELECTROPRODUCTION], FRAGMENTATION [QUARK], SEARCH FOR: NEW PARTICLE, MASS [LOWER LIMIT], DESY PETRA STOR, +2JET+MUON%22">ELECTRON POSITRON --> 2JET MUON, LOWER LIMIT [MASS], BOTTOM PARTICLE [SEMILEPTONIC DECAY], ddc:550, MUON: ELECTROPRODUCTION, THRUST [JET], BOTTOM PARTICLE: SEMILEPTONIC DECAY, JET: THRUST, SEMILEPTONIC DECAY [CHARMED PARTICLE], JET [ELECTROPRODUCTION], SEMILEPTONIC DECAY [BOTTOM PARTICLE], SEARCH FOR: HIGGS PARTICLE, COLLIDING BEAMS [ELECTRON POSITRON], ELECTRON POSITRON: INCLUSIVE REACTION, ELECTROPRODUCTION: JET, SEMILEPTONIC DECAY: CHARMED PARTICLE, HIGGS PARTICLE [SEARCH FOR], ELECTRON POSITRON: COLLIDING BEAMS, BRANCHING RATIO [CHARMED PARTICLE], MASS: LOWER LIMIT, ELECTROPRODUCTION [JET], SPECTRUM: TRANSVERSE MOMENTUM, QUARK: FRAGMENTATION, SEMILEPTONIC DECAY: BOTTOM PARTICLE, SEARCH FOR: HEAVY LEPTON, TRANSVERSE MOMENTUM: SPECTRUM, ELECTROPRODUCTION: MUON, CHARMED PARTICLE: BRANCHING RATIO, CHARMED PARTICLE [SEMILEPTONIC DECAY], 33.00-38.54 GEV-CMS, BOTTOM PARTICLE: BRANCHING RATIO, MOMENTUM SPECTRUM, ELECTROPRODUCTION [MUON], heavy quark, COLLIDING BEAMS: ELECTRON POSITRON, EXPERIMENTAL RESULTS, SPECTRUM [TRANSVERSE MOMENTUM], JET: ELECTROPRODUCTION, ELECTRON POSITRON [COLLIDING BEAMS], INCLUSIVE REACTION [ELECTRON POSITRON], CHARMED PARTICLE: SEMILEPTONIC DECAY, NEW PARTICLE [SEARCH FOR], TRANSVERSE MOMENTUM [SPECTRUM], MARK J, HEAVY LEPTON [SEARCH FOR], LOWER LIMIT: MASS
Abstract: (1983). doi:10.1103/PhysRevLett.51.443, The results of a high-statistics study of inclusive muon spectra at PETRA are reported. Improved mass limits have been obtained for heavy quarks, heavy leptons, and charged Higgs particles. It is shown that the fragmentation properties of b quarks and c quarks are different, with the mean fragmentation variables 〈zb〉=0.75±0.03±0.06, 〈zc〉=0.46±0.02±0.05 and the average semileptonic branching ratio for the B and C hadrons R(B)=(10.5±1.5±1.3)%, R(C)=(11.5±1.0±1.7)%.
Published: 1983
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26. IS A LIGHT GLUINO STILL COMPATIBLE WITH THE CERN COLLIDER DATA?

Author: Hagiwara, Kaoru
Subjects: MASS [GLUINO], MASS: GLUINO, 540: 630 GEV-CMS, JET [HADROPRODUCTION], 630 GEV-CMS [540], TRANSVERSE MOMENTUM: MISSING-ENERGY, INTERPRETATION OF EXPERIMENTS [NUMERICAL CALCULATIONS], TALK, HIGH [TRANSVERSE MOMENTUM], GLUINO [POSTULATED PARTICLE], INCLUSIVE REACTION [ANTI-P P], NUMERICAL CALCULATIONS: INTERPRETATION OF EXPERIMENTS, HADROPRODUCTION: JET, ANTI-P P: INCLUSIVE REACTION, SUPERSYMMETRY, GLUINO [MASS], SPECTRUM [TRANSVERSE MOMENTUM], MISSING-ENERGY [TRANSVERSE MOMENTUM], GLUINO [FRAGMENTATION FUNCTION], QUANTUM CHROMODYNAMICS, POSTULATED PARTICLE: GLUINO, FRAGMENTATION FUNCTION: GLUINO, TRANSVERSE MOMENTUM: HIGH, HADROPRODUCTION [JET], JET: HADROPRODUCTION, TRANSVERSE MOMENTUM [SPECTRUM], GLUINO: MASS, SPECTRUM: TRANSVERSE MOMENTUM, TRANSVERSE MOMENTUM: SPECTRUM
Abstract: 12 pp. (1985).
Published: 1985
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27. THE TRANSVERSE MOMENTUM PROFILE OF A QUARK JET

Author: Eichmann, G. and Steiner, F.
Subjects: JET [QUARK], MODEL: FIREBALL, Nuclear Theory, ELECTROPRODUCTION [PI], MODEL: PARTON, MOMENTUM: PARTON, ELECTROPRODUCTION: PI, PARTON [MOMENTUM], FIREBALL [MODEL], JET [MODEL], ddc:530, PI [ELECTROPRODUCTION], Nuclear Experiment, SPECTRUM [TRANSVERSE MOMENTUM], QUARK: JET, PI: ELECTROPRODUCTION, ANNIHILATION: ELECTRON POSITRON, MOMENT, ELECTRON POSITRON [ANNIHILATION], MODEL: JET, TRANSVERSE MOMENTUM [SPECTRUM], ANNIHILATION [ELECTRON POSITRON], SPECTRUM: TRANSVERSE MOMENTUM, High Energy Physics::Experiment, INTERPRETATION OF EXPERIMENTS, PARTON [MODEL], TRANSVERSE MOMENTUM: SPECTRUM, ELECTRON POSITRON: ANNIHILATION
Abstract: (1979). doi:10.1007/BF01546974, The first and second moments of the transverse momentum distribution of pions ine+e−-annihilation at fixed longitudinal momentum with respect to the jet axis are discussed, treating the hadronic final state evolving from the 2-quark system in the framework of a fireball-model. Good agreement with the published data is found. A comparison with thepT-distribution of electroproduction is made, showing qualitative agreement. This casts serious doubts on previous conclusions favoring a large partonkT inside the proton.
Published: 1978
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28. Two photon processes at PETRA

Author: W. Wagner
Subjects: MODEL: HARD SCATTERING, DESY PETRA STOR, +2PHOTON%22">F(1270) --> 2PHOTON, Resonance (particle physics), HIGH [TRANSVERSE MOMENTUM], STRUCTURE FUNCTION: X-DEPENDENCE, QUANTUM ELECTRODYNAMICS: VALIDITY TEST, MASS SPECTRUM: (POSITRON ELECTRON), 31 GEV-CMS, TWO-PHOTON: EXCHANGE, F(1270): ELECTROMAGNETIC DECAY, +QUARK+ANTIQUARK%22">PHOTON PHOTON --> QUARK ANTIQUARK, PHOTON PHOTON: INTERACTION, ELECTROPRODUCTION [F(1270)], DECAY WIDTH [F(1270)], (POSITRON ELECTRON): MASS SPECTRUM, MODEL [HARD SCATTERING], TRANSVERSE MOMENTUM: SPECTRUM, MOMENTUM TRANSFER [CHANNEL CROSS SECTION], MULTIPLE PRODUCTION [HADRON], +2POSITRON+2ELECTRON%22">ELECTRON POSITRON --> 2POSITRON 2ELECTRON, F(1270) [ELECTROMAGNETIC DECAY], Inelastic scattering, ELECTRON POSITRON [INELASTIC SCATTERING], ELECTROPRODUCTION: F(1270), INTERACTION: PHOTON PHOTON, Nuclear physics, CHANNEL CROSS SECTION: MOMENTUM TRANSFER, F(1270): ELECTROPRODUCTION, Multiphoton processes, ddc:530, COLLIDING BEAMS: ELECTRON POSITRON, TWO-PHOTON [EXCHANGE], JET: ELECTROPRODUCTION, Scattering, VALIDITY TEST [QUANTUM ELECTRODYNAMICS], Deep inelastic scattering, ELECTRON POSITRON [COLLIDING BEAMS], Photon structure function, Chemical reaction cross sections, EXCHANGE: TWO-PHOTON, ENERGY DEPENDENCE [CHANNEL CROSS SECTION], PHOTON ELECTRON: DEEP INELASTIC SCATTERING, X-DEPENDENCE [STRUCTURE FUNCTION], EXPERIMENTAL RESULTS [REVIEW], INTERACTION [PHOTON PHOTON], Photon scattering, (MUON+ MUON-) [MASS SPECTRUM], MULTIPLE PRODUCTION: HADRON, Physics, F(1270) [DECAY WIDTH], F(1270) [ELECTROPRODUCTION], INELASTIC SCATTERING: ELECTRON POSITRON, DEEP INELASTIC SCATTERING [PHOTON ELECTRON], EXCHANGE [TWO-PHOTON], JET [ELECTROPRODUCTION], +MUON%2B+MUON-+POSITRON+ELECTRON%22">ELECTRON POSITRON --> MUON+ MUON- POSITRON ELECTRON, COLLIDING BEAMS [ELECTRON POSITRON], HADRON [MULTIPLE PRODUCTION], ELECTROPRODUCTION: JET, INELASTIC SCATTERING [ELECTRON POSITRON], DECAY WIDTH: F(1270), ELECTRON POSITRON: COLLIDING BEAMS, ELECTROMAGNETIC DECAY [F(1270)], REVIEW: EXPERIMENTAL RESULTS, ELECTROPRODUCTION [JET], Two-photon physics, SPECTRUM: TRANSVERSE MOMENTUM, (POSITRON ELECTRON) [MASS SPECTRUM], MASS SPECTRUM: (MUON+ MUON-), PHOTON ELECTRON [DEEP INELASTIC SCATTERING], VECTOR DOMINANCE [MODEL], ELECTRON POSITRON: INELASTIC SCATTERING, CHANNEL CROSS SECTION: ENERGY DEPENDENCE, HARD SCATTERING: MODEL, (MUON+ MUON-): MASS SPECTRUM, ELECTROMAGNETIC DECAY: F(1270), STRUCTURE FUNCTION [PHOTON], MASS SPECTRUM [(MUON+ MUON-)], SPECTRUM [TRANSVERSE MOMENTUM], Photons, MASS SPECTRUM [(POSITRON ELECTRON)], DEEP INELASTIC SCATTERING: PHOTON ELECTRON, TRANSVERSE MOMENTUM: HIGH, HADRON: MULTIPLE PRODUCTION, Pair production, TRANSVERSE MOMENTUM [SPECTRUM], HARD SCATTERING [MODEL], MODEL: VECTOR DOMINANCE, PHOTON: STRUCTURE FUNCTION, F(1270): DECAY WIDTH, PHOTON PHOTON [INTERACTION], Lepton
Abstract: 155841 (1980)., The analysis of two photon physics at the e+e− storage ring PETRA is reviewed. Higher order QED processes e+e−→e+e−e+e−(e+e−μ+μ−) have been measured in good agreement with the QED calculations. The production of the f0 resonance has been invstigated and the radiative width has been determined. The total cross section σ(Q2,W) of the inelastic electron photon scattering has been studied in some detail. Evidence for the production of large PT jets in the reaction γγ→qq̄ is reported and a first measurement of the photon structure function in deep inelastic eγ scattering is discussed.
Published: 1980
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29. FRAGMENTATION OF QUARKS AND GLUONS

Author: Soeding, Paul
Subjects: FRAGMENTATION [QUARK], MASS [(2JET)], STRING [MODEL], EXPERIMENTAL RESULTS [REVIEW], ENERGY DEPENDENCE, HADRON: YIELD, BIBLIOGRAPHY, ANGULAR CORRELATION: ASYMMETRY, MODEL: INDEPENDENT EMISSION, QUARK: FLAVOR, LEPTON NUCLEUS: DEEP INELASTIC SCATTERING, HADROPRODUCTION: JET, FRAGMENTATION FUNCTION, NUCLEAR MATTER, MASS NUMBER [DEPENDENCE], CHARGED PARTICLE: MULTIPLICITY, PARTICLE IDENTIFICATION [HADRON], YIELD [HADRON], JET [ELECTROPRODUCTION], VIOLATION [SCALING], COLLIDING BEAMS [ELECTRON POSITRON], ELECTROPRODUCTION: JET, MULTIPLICITY [CHARGED PARTICLE], HADROPRODUCTION [JET], ANNIHILATION: ELECTRON POSITRON, RAPIDITY [SPECTRUM], ELECTRON POSITRON: COLLIDING BEAMS, ASYMMETRY [ANGULAR CORRELATION], JET: HADROPRODUCTION, MASS NUMBER: DEPENDENCE, ELECTRON POSITRON [ANNIHILATION], REVIEW: EXPERIMENTAL RESULTS, FRAGMENTATION [GLUON], ANNIHILATION [ELECTRON POSITRON], ELECTROPRODUCTION [JET], PERTURBATION THEORY [QUANTUM CHROMODYNAMICS], MODEL [INDEPENDENT EMISSION], SPECTRUM: TRANSVERSE MOMENTUM, QUARK: FRAGMENTATION, CORRELATION, INDEPENDENT EMISSION: MODEL, TRANSVERSE MOMENTUM: SPECTRUM, MASS: (2JET), JET [HADROPRODUCTION], DEEP INELASTIC SCATTERING [LEPTON NUCLEUS], DEPENDENCE [MASS NUMBER], FLAVOR [QUARK], (2JET) [MASS], COUPLING CONSTANT [STRONG INTERACTION], INDEPENDENT EMISSION [MODEL], COUPLING CONSTANT: STRONG INTERACTION, DEPENDENCE: MASS NUMBER, STRONG INTERACTION [COUPLING CONSTANT], COLLIDING BEAMS: ELECTRON POSITRON, SPECTRUM [TRANSVERSE MOMENTUM], MODEL: STRING, HADRON: PARTICLE IDENTIFICATION, GLUON: FRAGMENTATION, KNO [SCALING], LEPTON NUCLEUS [DEEP INELASTIC SCATTERING], JET: ELECTROPRODUCTION, SCALING: VIOLATION, SPECTRUM [RAPIDITY], QUANTUM CHROMODYNAMICS: PERTURBATION THEORY, SCALING: KNO, ELECTRON POSITRON [COLLIDING BEAMS], TRANSVERSE MOMENTUM [SPECTRUM], (2JET): MASS, STRONG INTERACTION: COUPLING CONSTANT, DEEP INELASTIC SCATTERING: LEPTON NUCLEUS, RAPIDITY: SPECTRUM, ELECTRON POSITRON: ANNIHILATION, SPECTRUM: RAPIDITY
Abstract: 38 pp. (1983).
Published: 1983
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30. THE TOTAL CROSS-SECTION $\gamma \gamma \to$ HADRONS

Author: Knies, G.
Subjects: EXPERIMENTAL RESULTS [REVIEW], MOMENTUM TRANSFER [CROSS SECTION], DESY PETRA STOR, INTERACTION [PHOTON PHOTON], HADRON: ELECTROPRODUCTION, MULTIPLE PRODUCTION: HADRON, ELECTROPRODUCTION [HADRON], PLUTO, CROSS SECTION: ENERGY DEPENDENCE, ELECTROPRODUCTION: HADRON, CHARGED PARTICLE: MULTIPLICITY, +%28N%29HADRON+POSITRON+ELECTRON%22">ELECTRON POSITRON --> (N)HADRON POSITRON ELECTRON, HADRON [ELECTROPRODUCTION], CROSS SECTION: MOMENTUM TRANSFER, INELASTIC SCATTERING: ELECTRON POSITRON, TWO-PHOTON: EXCHANGE, EXCHANGE [TWO-PHOTON], HADRON [MULTIPLE PRODUCTION], INELASTIC SCATTERING [ELECTRON POSITRON], MULTIPLICITY [CHARGED PARTICLE], PHOTON [TAGGED BEAM], PHOTON: TAGGED BEAM, PHOTON PHOTON: INTERACTION, REVIEW: EXPERIMENTAL RESULTS, FACTORIZATION [CROSS SECTION], SPECTRUM: TRANSVERSE MOMENTUM, TRANSVERSE MOMENTUM: SPECTRUM, CROSS SECTION: HADRONIC, MULTIPLE PRODUCTION [HADRON], ELECTRON POSITRON [INELASTIC SCATTERING], VECTOR DOMINANCE [MODEL], HADRONIC [CROSS SECTION], BACKGROUND, ELECTRON POSITRON: INELASTIC SCATTERING, CROSS SECTION: FACTORIZATION, SLAC PEP STOR, INTERACTION: PHOTON PHOTON, quark model PARTON, TAGGED BEAM [PHOTON], DUALITY, SPECTRUM [TRANSVERSE MOMENTUM], TWO-PHOTON [EXCHANGE], ENERGY DEPENDENCE [CROSS SECTION], HADRON: MULTIPLE PRODUCTION, EXCHANGE: TWO-PHOTON, TRANSVERSE MOMENTUM [SPECTRUM], TAGGED BEAM: PHOTON, MODEL: VECTOR DOMINANCE, PHOTON PHOTON [INTERACTION]
Abstract: 42 pp. (1984).
Published: 1984
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31. 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
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32. NEW RESULTS IN e+ e- ANNIHILATION FROM PETRA

Author: Schopper, H.
Subjects: (2JET): FINAL STATE, DIFFERENTIAL CROSS SECTION: X-DEPENDENCE, +MUON%2B+MUON%22">ELECTRON POSITRON --> MUON+ MUON, GLUON: BREMSSTRAHLUNG, CHANNEL CROSS SECTION [HADRONIC], SPECTRUM [SPHERICITY], DESY PETRA STOR, CHANNEL CROSS SECTION: HADRONIC, SEARCH FOR [top], SPECTRUM [THRUST], ANGULAR DEPENDENCE [DIFFERENTIAL CROSS SECTION], EXPERIMENTAL RESULTS: REVIEW, QUANTUM ELECTRODYNAMICS: VALIDITY TEST, TAU: PAIR PRODUCTION, CHARGED PARTICLE: MULTIPLICITY, TWO-PHOTON: EXCHANGE, ENERGY DEPENDENCE: CHANNEL CROSS SECTION, PAIR PRODUCTION: TAU, PAIR PRODUCTION [TAU], ANNIHILATION: ELECTRON POSITRON, FINAL STATE [(3JET)], ELECTRON POSITRON [ELASTIC SCATTERING], ELECTRON POSITRON [ANNIHILATION], ELASTIC SCATTERING [ELECTRON POSITRON], SPECTRUM: SPHERICITY, FINAL STATE: (2JET), ANNIHILATION [ELECTRON POSITRON], X-DEPENDENCE [DIFFERENTIAL CROSS SECTION], TRANSVERSE MOMENTUM: SPECTRUM, TRANSVERSE MOMENTUM [DIFFERENTIAL CROSS SECTION], X-DEPENDENCE: DIFFERENTIAL CROSS SECTION, DIFFERENTIAL CROSS SECTION: TRANSVERSE MOMENTUM, (3JET) [FINAL STATE], ANGULAR DISTRIBUTION [(JET)], Y-DEPENDENCE [DIFFERENTIAL CROSS SECTION], FINAL STATE [(2JET)], COLLIDING BEAMS: ELECTRON POSITRON, SPECTRUM: THRUST, TWO-PHOTON [EXCHANGE], DIFFERENTIAL CROSS SECTION [Y-DEPENDENCE], JET: ELECTROPRODUCTION, TOP: JET, DIFFERENTIAL CROSS SECTION [X-DEPENDENCE], VALIDITY TEST [QUANTUM ELECTRODYNAMICS], ELECTRON POSITRON [COLLIDING BEAMS], +TAU%2B+TAU%22">ELECTRON POSITRON --> TAU+ TAU, EXCHANGE: TWO-PHOTON, DIFFERENTIAL CROSS SECTION: ANGULAR DEPENDENCE, MUON [PAIR PRODUCTION], UNIVERSALITY [LEPTON], DIFFERENTIAL CROSS SECTION: Y-DEPENDENCE, ENERGY DEPENDENCE [CHANNEL CROSS SECTION], ELECTRON POSITRON: ANNIHILATION, PAIR PRODUCTION [MUON], EXPERIMENTAL RESULTS [REVIEW], THRUST: SPECTRUM, (3JET): FINAL STATE, Y-DEPENDENCE: DIFFERENTIAL CROSS SECTION, SPHERICITY [SPECTRUM], JET [GLUON], HADRONIC: CHANNEL CROSS SECTION, GLUON [BREMSSTRAHLUNG], (JET): ANGULAR DISTRIBUTION, SPHERICITY: SPECTRUM, ANGULAR DISTRIBUTION: (JET), JET [ELECTROPRODUCTION], EXCHANGE [TWO-PHOTON], HADRONIC [CHANNEL CROSS SECTION], FINAL STATE: (3JET), COLLIDING BEAMS [ELECTRON POSITRON], ELECTROPRODUCTION: JET, MULTIPLICITY [CHARGED PARTICLE], REVIEW [EXPERIMENTAL RESULTS], TRANSVERSE MOMENTUM: DIFFERENTIAL CROSS SECTION, ANGULAR DEPENDENCE: DIFFERENTIAL CROSS SECTION, RATIO [TOTAL CROSS SECTION], ELECTRON POSITRON: COLLIDING BEAMS, REVIEW: EXPERIMENTAL RESULTS, ELASTIC SCATTERING: ELECTRON POSITRON, top: SEARCH FOR, ELECTROPRODUCTION [JET], SPECTRUM: TRANSVERSE MOMENTUM, CHANNEL CROSS SECTION [ENERGY DEPENDENCE], BREMSSTRAHLUNG: GLUON, DIFFERENTIAL CROSS SECTION [ANGULAR DEPENDENCE], LEPTON: UNIVERSALITY, RATIO: TOTAL CROSS SECTION, TOTAL CROSS SECTION [RATIO], ELECTRON POSITRON: ELASTIC SCATTERING, MUON: PAIR PRODUCTION, CHANNEL CROSS SECTION: ENERGY DEPENDENCE, (2JET) [FINAL STATE], (JET) [ANGULAR DISTRIBUTION], BREMSSTRAHLUNG [GLUON], TAU [PAIR PRODUCTION], GLUON: JET, THRUST [SPECTRUM], TOTAL CROSS SECTION: RATIO, SPECTRUM [TRANSVERSE MOMENTUM], 17.0-31.6 GEV-CM, PAIR PRODUCTION: MUON, JET [TOP], TRANSVERSE MOMENTUM [SPECTRUM], DIFFERENTIAL CROSS SECTION [TRANSVERSE MOMENTUM]
Abstract: 34 pp. (1979).
Published: 1979
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33. Summary of the Sessions on Lepton-Hadron Physics

Author: Haidt, Dieter
Subjects: X-DEPENDENCE [STRUCTURE FUNCTION], TRANSVERSE [CROSS SECTION], DEEP INELASTIC SCATTERING: NEUTRINO NUCLEON, EXPERIMENTAL RESULTS [REVIEW], CROSS SECTION: RATIO, MODEL: PARTON, BEAM DUMP: EXPERIMENTAL METHODS, LEPTON NUCLEON: DEEP INELASTIC SCATTERING, LEPTOPRODUCTION: HADRON, STRUCTURE FUNCTION: X-DEPENDENCE, EXPERIMENTAL METHODS: BEAM DUMP, HADRON: LEPTOPRODUCTION, LEPTON NUCLEUS: DEEP INELASTIC SCATTERING, RATIO [CROSS SECTION], CHARM [FRAGMENTATION FUNCTION], BEAM DUMP [EXPERIMENTAL METHODS], SUM RULE: CALLAN-GROSS, DEEP INELASTIC SCATTERING [LEPTON NUCLEON], FRAGMENTATION FUNCTION: CHARM, RAPIDITY [SPECTRUM], REVIEW: EXPERIMENTAL RESULTS, NEUTRINO NUCLEON: DEEP INELASTIC SCATTERING, DEEP INELASTIC SCATTERING: LEPTON NUCLEON, SPECTRUM: TRANSVERSE MOMENTUM, ANGULAR DISTRIBUTION, TRANSVERSE MOMENTUM: SPECTRUM, DEEP INELASTIC SCATTERING [NEUTRINO NUCLEON], DEEP INELASTIC SCATTERING [LEPTON NUCLEUS], NEUTRAL CURRENT, conference summary, LEPTON NUCLEON [DEEP INELASTIC SCATTERING], NEUTRINO NUCLEON [DEEP INELASTIC SCATTERING], LEPTOPRODUCTION [HADRON], CHARGED PARTICLE: MULTIPLE PRODUCTION, CALLAN-GROSS [SUM RULE], CHARGED PARTICLE [MULTIPLE PRODUCTION], CROSS SECTION: TRANSVERSE, DIFFERENTIAL CROSS SECTION: ASYMMETRY, CROSS SECTION: LONGITUDINAL, LEPTON HADRON: INCLUSIVE REACTION, ENERGY DEPENDENCE [MULTIPLICITY], ASYMMETRY: DIFFERENTIAL CROSS SECTION, SPECTRUM [TRANSVERSE MOMENTUM], EXPERIMENTAL METHODS [BEAM DUMP], LEPTON NUCLEUS [DEEP INELASTIC SCATTERING], LONGITUDINAL [CROSS SECTION], MULTIPLICITY: ENERGY DEPENDENCE, MULTIPLE PRODUCTION [CHARGED PARTICLE], SPECTRUM [RAPIDITY], HADRON [LEPTOPRODUCTION], INCLUSIVE REACTION [LEPTON HADRON], TRANSVERSE MOMENTUM [SPECTRUM], DIFFERENTIAL CROSS SECTION [ASYMMETRY], DEEP INELASTIC SCATTERING: LEPTON NUCLEUS, MULTIPLE PRODUCTION: CHARGED PARTICLE, RAPIDITY: SPECTRUM, PARTON [MODEL], SPECTRUM: RAPIDITY, ASYMMETRY [DIFFERENTIAL CROSS SECTION]
Abstract: 17 pp. (1982)., Without abstract
Published: 1982
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34. Inclusive $K^0_S$ and $\Lambda$ Electroproduction

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., Soding, P., and Sadoff, A.
Subjects: ELECTRON P: INCLUSIVE REACTION, ELECTROPRODUCTION: LAMBDA, ELECTRON: FINAL STATE, K0(S): ELECTROPRODUCTION, FINAL STATE: LAMBDA, SPECTRUM: LONGITUDINAL MOMENTUM, FINAL STATE: ELECTRON, LAMBDA: FINAL STATE, EXPERIMENTAL RESULTS: STREAMER CHAMBER, +LAMBDA+ELECTRON+ANYTHING%22">ELECTRON P --> LAMBDA ELECTRON ANYTHING, STREAMER CHAMBER: EXPERIMENTAL RESULTS, CORNELL ES, LAMBDA: ELECTROPRODUCTION, SPECTRUM: TRANSVERSE MOMENTUM, ELECTROPRODUCTION: K0(S), QUARK: FRAGMENTATION, +K0%28S%29+ELECTRON+ANYTHING%22">ELECTRON P --> K0(S) ELECTRON ANYTHING, 11.5 GEV
Abstract: Physical review letters 40(25), 1614 - 1617 (1978). doi:10.1103/PhysRevLett.40.1614, 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 by APS, College Park, Md.
Published: 1978
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35. Transverse Momenta of Hadronically Produced Heavy Quark Systems: 2 $\to$ 3 Processes in {QCD}

Author: Kunszt, Z., Pietarinen, E., and Reya, E.
Subjects: INELASTIC SCATTERING [ANTI-P P], J/PSI(3100): HADROPRODUCTION, QUARK ANTIQUARK [INTERACTION], J/PSI(3100) [HADROPRODUCTION], DIMUON: FINAL STATE, QUARK GLUON [INTERACTION], NUMERICAL CALCULATIONS, INTERACTION: GLUON GLUON, UPSILON(9500): HADROPRODUCTION, Nuclear Experiment, QUANTUM CHROMODYNAMICS, INTERACTION [QUARK ANTIQUARK], +HEAVY+QUARK+HEAVY+ANTIQUARK+QUARK%22">QUARK GLUON --> HEAVY QUARK HEAVY ANTIQUARK QUARK, INTERACTION [GLUON GLUON], HADROPRODUCTION: PSI(3700), HADROPRODUCTION: J/PSI(3100), TRANSVERSE MOMENTUM: DIFFERENTIAL CROSS SECTION, +HEAVY+QUARK+HEAVY+ANTIQUARK+GLUON%22">QUARK ANTIQUARK --> HEAVY QUARK HEAVY ANTIQUARK GLUON, PSI(3700) [HADROPRODUCTION], QUARK GLUON: INTERACTION, SPECTRUM: TRANSVERSE MOMENTUM, PSI(3700): HADROPRODUCTION, TRANSVERSE MOMENTUM: SPECTRUM, INELASTIC SCATTERING [P P], HADROPRODUCTION [UPSILON(10000)], INELASTIC SCATTERING: P P, ANTI-P P: INELASTIC SCATTERING, INTERACTION: QUARK GLUON, INTERACTION: QUARK ANTIQUARK, DIMUON [FINAL STATE], HADROPRODUCTION [J/PSI(3100)], TRANSVERSE MOMENTUM [DIFFERENTIAL CROSS SECTION], HADROPRODUCTION [PSI(3700)], DIFFERENTIAL CROSS SECTION: TRANSVERSE MOMENTUM, UPSILON(10000) [HADROPRODUCTION], HADROPRODUCTION: UPSILON(9500), +HEAVY+QUARK+HEAVY+ANTIQUARK+GLUON%22">GLUON GLUON --> HEAVY QUARK HEAVY ANTIQUARK GLUON, ddc:530, ANTI-P P [INELASTIC SCATTERING], SPECTRUM [TRANSVERSE MOMENTUM], HADROPRODUCTION: UPSILON(10000), GLUON GLUON [INTERACTION], P P [INELASTIC SCATTERING], INELASTIC SCATTERING: ANTI-P P, High Energy Physics::Phenomenology, FINAL STATE: DIMUON, FINAL STATE [DIMUON], QUARK ANTIQUARK: INTERACTION, INTERACTION [QUARK GLUON], UPSILON(10000): HADROPRODUCTION, TRANSVERSE MOMENTUM [SPECTRUM], P P: INELASTIC SCATTERING, UPSILON(9500) [HADROPRODUCTION], GLUON GLUON: INTERACTION, HADROPRODUCTION [UPSILON(9500)], High Energy Physics::Experiment, DIFFERENTIAL CROSS SECTION [TRANSVERSE MOMENTUM]
Abstract: (1980). doi:10.1103/PhysRevD.21.733, Transverse-momentum spectra are calculated for heavy quarkonium states QQ¯ (Jψ,ϒ) produced in pp and p¯p collisions. These transverse momenta result from the hard quark (q) and gluon (g) subprocesses qq¯→QQ¯g, gq→QQ¯q, and gg→QQ¯g. The pT distributions for Jψ production are expected to be significantly steeper than for the μ+μ− continuum, whereas the two distributions become similar in the ϒ mass region. These effects are partly confirmed by recent CERN ISR measurements. Predictions for p¯p collisions at s=540 GeV are also given.
Published: 1979
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36. Characteristics of heavy flavour production in ep collisions

Author: Ingelman, G. and Schuler, G. A.
Subjects: STRING [MODEL], HADRONIZATION [QUARK], QUARK: HADRONIZATION, INELASTIC SCATTERING: ELECTRON P, PARTON [SHOWERS], ELECTRON P [INELASTIC SCATTERING], EVENT SHAPE ANALYSIS, BOSON GLUON [FUSION], TRANSVERSE ENERGY: SPECTRUM, TRANSVERSE ENERGY [SPECTRUM], NUMERICAL CALCULATIONS: MONTE CARLO, QUARK [SEMILEPTONIC DECAY], GLUON: EMISSION, MONTE CARLO [NUMERICAL CALCULATIONS], GLUON [EMISSION], RAPIDITY [SPECTRUM], EMISSION [GLUON], SPECTRUM: TRANSVERSE MOMENTUM, QUARK [PAIR PRODUCTION], ELECTRON P: INELASTIC SCATTERING, QUARK: PAIR PRODUCTION, TRANSVERSE MOMENTUM: SPECTRUM, FRAGMENTATION [MODEL], SPECTRUM [TRANSVERSE ENERGY], BOTTOM, PAIR PRODUCTION [QUARK], QUARK: SEMILEPTONIC DECAY, top, CHARM, SEMILEPTONIC DECAY: QUARK, FUSION: BOSON GLUON, EMISSION: GLUON, ddc:530, KINEMATICS, SHOWERS: PARTON, MODEL: STRING, SPECTRUM [TRANSVERSE MOMENTUM], SPECTRUM [RAPIDITY], MODEL: QUARK PARTON, PAIR PRODUCTION: QUARK, SEMILEPTONIC DECAY [QUARK], QUARK PARTON [MODEL], MODEL: FRAGMENTATION, TRANSVERSE MOMENTUM [SPECTRUM], SPECTRUM: TRANSVERSE ENERGY, RAPIDITY: SPECTRUM, INELASTIC SCATTERING [ELECTRON P], SPECTRUM: RAPIDITY, CROSS SECTION
Abstract: 26 pp. (1988)., The production of heavy flavours inep collisions at the HERA energy is studied using a model based on boson-gluon fusion into a heavy quark-antiquark pair followed by gluon emission and string hadronization. Total cross-sections and dependence on basic kinematical variables are given as well as distributions of the most important variables at both the quark and hadron level, e.g. rapidity and transverse momentum. Charm, bottom and top production is compared and signatures for their separation are discussed in terms of decay muons and global event shape properties.
Published: 1988
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37. Summary of the experimental discussion session

Author: Spitzer, Hartwig
Subjects: TOTAL CROSS SECTION: HADRONIC, LOW [MOMENTUM TRANSFER], P [PAIR PRODUCTION], PAIR PRODUCTION [P], INTERACTION [PHOTON PHOTON], HADRONIC: TOTAL CROSS SECTION, MOMENTUM TRANSFER: LOW, MULTIPLE PRODUCTION: HADRON, HIGH [TRANSVERSE MOMENTUM], MESON RESONANCE: ELECTROPRODUCTION, HIGH [MOMENTUM TRANSFER], ELECTROPRODUCTION: MESON RESONANCE, ELECTRON [TAGGED BEAM], INELASTIC SCATTERING: ELECTRON POSITRON, TWO-PHOTON: EXCHANGE, EXCHANGE [TWO-PHOTON], COLLIDING BEAMS [ELECTRON POSITRON], HADRON [MULTIPLE PRODUCTION], PAIR PRODUCTION: P, INELASTIC SCATTERING [ELECTRON POSITRON], TAGGED BEAM [ELECTRON], PHOTON [TAGGED BEAM], PHOTON: TAGGED BEAM, PHOTON PHOTON: INTERACTION, ELECTRON POSITRON: COLLIDING BEAMS, ELECTRON: TAGGED BEAM, +2PHOTON+-->+%28N%29HADRON%22">ELECTRON POSITRON --> 2PHOTON --> (N)HADRON, TOTAL CROSS SECTION [HADRONIC], SPECTRUM: TRANSVERSE MOMENTUM, ANGULAR DISTRIBUTION, TRANSVERSE MOMENTUM: SPECTRUM, MULTIPLE PRODUCTION [HADRON], JET [QUARK], ELECTRON POSITRON [INELASTIC SCATTERING], MASS SPECTRUM, conference summary, MESON RESONANCE [ELECTROPRODUCTION], ELECTRON POSITRON: INELASTIC SCATTERING, CHANNEL CROSS SECTION: ENERGY DEPENDENCE, TAGGED BEAM: ELECTRON, INTERACTION: PHOTON PHOTON, TAGGED BEAM [PHOTON], HADRONIC [TOTAL CROSS SECTION], STRUCTURE FUNCTION [PHOTON], COLLIDING BEAMS: ELECTRON POSITRON, EXPERIMENTAL RESULTS, SPECTRUM [TRANSVERSE MOMENTUM], MOMENTUM TRANSFER: HIGH, QUARK: JET, TWO-PHOTON [EXCHANGE], TRANSVERSE MOMENTUM: HIGH, HADRON: MULTIPLE PRODUCTION, ELECTRON POSITRON [COLLIDING BEAMS], ELECTROPRODUCTION [MESON RESONANCE], EXCHANGE: TWO-PHOTON, TRANSVERSE MOMENTUM [SPECTRUM], TAGGED BEAM: PHOTON, P: PAIR PRODUCTION, PHOTON: STRUCTURE FUNCTION, ENERGY DEPENDENCE [CHANNEL CROSS SECTION], PHOTON PHOTON [INTERACTION]
Abstract: 34 pp. (1983)., A total of 26 papers have been contributed to the experimental discussion session. I will discuss some of the tools needed for 2γ experimentation and then point to highlights and regions of particular
Published: 1983
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38. JET PRODUCTION IN e+ e- ANNIHILATION AND DECAYS OF THE upsilon (9.46) RESONANCE: RESULTS FROM PLUTO

Author: Knies, Gerhard
Subjects: DECAY: UPSILON(9500), CHANNEL CROSS SECTION [HADRONIC], EXPERIMENTAL RESULTS [REVIEW], MOMENTUM SPECTRUM: ENERGY DEPENDENCE, UPSILON(9500): DECAY, DESY PETRA STOR, CHANNEL CROSS SECTION: HADRONIC, EXPERIMENTAL RESULTS: REVIEW, PLUTO, SPECTRUM [X-DEPENDENCE], DECAY [UPSILON(9500)], HADRONIC: CHANNEL CROSS SECTION, THRUST [JET], JET: THRUST, QUANTUM CHROMODYNAMICS, EXCHANGE: THREE-GLUON, JET [ELECTROPRODUCTION], HADRONIC [CHANNEL CROSS SECTION], ELECTROPRODUCTION: JET, COLLIDING BEAMS [ELECTRON POSITRON], SPECTRUM: X-DEPENDENCE, ANNIHILATION: ELECTRON POSITRON, REVIEW [EXPERIMENTAL RESULTS], JET: SPHERICITY, RAPIDITY [SPECTRUM], ELECTRON POSITRON: COLLIDING BEAMS, SPHERICITY [JET], DALITZ PLOT [MULTIDIMENSIONAL ANALYSIS], REVIEW: EXPERIMENTAL RESULTS, ELECTRON POSITRON [ANNIHILATION], THREE-GLUON [EXCHANGE], FRAGMENTATION [GLUON], ANNIHILATION [ELECTRON POSITRON], ELECTROPRODUCTION [JET], MULTIDIMENSIONAL ANALYSIS: DALITZ PLOT, SPECTRUM: TRANSVERSE MOMENTUM, ENERGY DEPENDENCE [MOMENTUM SPECTRUM], ANGULAR DISTRIBUTION, TRANSVERSE MOMENTUM: SPECTRUM, PAIR PRODUCTION: QUARK ANTIQUARK, X-DEPENDENCE: SPECTRUM, X-DEPENDENCE [SPECTRUM], QUARK ANTIQUARK [PAIR PRODUCTION], EXCHANGE [THREE-GLUON], bottom, THREE-GLUON: EXCHANGE, 3.10-5.00: 7.70: 9.40: 9.45: 13.00: 17.00 GEV-CM, UPSILON(9500) [DECAY], COLLIDING BEAMS: ELECTRON POSITRON, SPECTRUM [TRANSVERSE MOMENTUM], GLUON: FRAGMENTATION, PAIR PRODUCTION [QUARK ANTIQUARK], JET: ELECTROPRODUCTION, DESY DORIS STOR, SPECTRUM [RAPIDITY], ELECTRON POSITRON [COLLIDING BEAMS], TRANSVERSE MOMENTUM [SPECTRUM], 7.70: 9.40: 9.45: 13.00: 17.00 GEV-CM [3.10-5.00], QUARK ANTIQUARK: PAIR PRODUCTION, RAPIDITY: SPECTRUM, ELECTRON POSITRON: ANNIHILATION, SPECTRUM: RAPIDITY
Abstract: 30 pp. (1979).
Published: 1979
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39. QED PROCESSES IN TWO PHOTON REACTIONS

Author: Pohl, Marvin
Subjects: +2POSITRON+2ELECTRON%22">ELECTRON POSITRON --> 2POSITRON 2ELECTRON, 29-35 GEV-CMS, ELECTRON POSITRON [INELASTIC SCATTERING], QUANTUM ELECTRODYNAMICS, INTERPRETATION OF EXPERIMENTS [NUMERICAL CALCULATIONS], ELECTRON POSITRON: INELASTIC SCATTERING, INTERACTION [PHOTON PHOTON], MOMENTUM TRANSFER: SPECTRUM, INTERACTION: PHOTON PHOTON, NUMERICAL CALCULATIONS: INTERPRETATION OF EXPERIMENTS, APPROXIMATION: EQUIVALENT PHOTON, SPECTRUM [MOMENTUM TRANSFER], +MUON%2B+MUON-+POSITRON+ELECTRON%22">ELECTRON POSITRON --> MUON+ MUON- POSITRON ELECTRON, SPECTRUM [TRANSVERSE MOMENTUM], TWO-PHOTON [EXCHANGE], INELASTIC SCATTERING: ELECTRON POSITRON, TWO-PHOTON: EXCHANGE, EXCHANGE [TWO-PHOTON], SPECTRUM: MOMENTUM TRANSFER, INELASTIC SCATTERING [ELECTRON POSITRON], PHOTON PHOTON: INTERACTION, MOMENTUM TRANSFER [SPECTRUM], EXCHANGE: TWO-PHOTON, TRANSVERSE MOMENTUM [SPECTRUM], EQUIVALENT PHOTON [APPROXIMATION], SPECTRUM: TRANSVERSE MOMENTUM, High Energy Physics::Experiment, TRANSVERSE MOMENTUM: SPECTRUM, PHOTON PHOTON [INTERACTION]
Abstract: 17 pp. (1983)., I review experimental results on the reactions e+e− → e+e−e+e− and e+e− → e+e− μ+μ− from PETRA and PEP. Recent high statistics measurements are compared to QED predictions in the form of diagrammatic
Published: 1983
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40. GENERAL FEATURES OF JETS IN e+ e- ANNIHILATION

Author: Mattig, Peter
Subjects: MULTIPLE PRODUCTION [HADRON], FRAGMENTATION [QUARK], EXPERIMENTAL RESULTS [REVIEW], ENERGY DEPENDENCE, D*(2010): ELECTROPRODUCTION, D*(2010) [ELECTROPRODUCTION], DESY PETRA STOR, CORRELATION [CHARGE], MULTIPLE PRODUCTION: HADRON, CORRELATION: MULTIPLICITY, QUARK: CHARM, SHORT-RANGE [CORRELATION], MOMENT: MULTIPLICITY, COLLIDING BEAMS: ELECTRON POSITRON, CHARGED PARTICLE: MULTIPLICITY, SPECTRUM [TRANSVERSE MOMENTUM], PARAMETRIZATION, KNO [SCALING], JET: ELECTROPRODUCTION, JET [ELECTROPRODUCTION], SPECTRUM [RAPIDITY], ELECTROPRODUCTION: JET, ELECTROPRODUCTION: D*(2010), COLLIDING BEAMS [ELECTRON POSITRON], HADRON [MULTIPLE PRODUCTION], SCALING: KNO, MULTIPLICITY [CHARGED PARTICLE], HADRON: MULTIPLE PRODUCTION, ANNIHILATION: ELECTRON POSITRON, ELECTRON POSITRON [COLLIDING BEAMS], RAPIDITY [SPECTRUM], ELECTRON POSITRON: COLLIDING BEAMS, REVIEW: EXPERIMENTAL RESULTS, ELECTRON POSITRON [ANNIHILATION], MULTIPLICITY [MOMENT], TRANSVERSE MOMENTUM [SPECTRUM], ELECTROPRODUCTION [D*(2010)], ANNIHILATION [ELECTRON POSITRON], CHARGE: CORRELATION, ELECTROPRODUCTION [JET], SPECTRUM: TRANSVERSE MOMENTUM, QUARK: FRAGMENTATION, RAPIDITY: SPECTRUM, CORRELATION: SHORT-RANGE, MULTIPLICITY [CORRELATION], TRANSVERSE MOMENTUM: SPECTRUM, ELECTRON POSITRON: ANNIHILATION, CHARM [QUARK], SPECTRUM: RAPIDITY
Abstract: 29 pp. (1985).
Published: 1985
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