Green, P.W.; Greeniaus, L.G.; Kitching, P.; Martens, F.K.; Miller, C.A.; Gao, H.; Hansen, J.; Jackson, H.E.; Makins, N.C.; ONeill, T.G.; Potterveld, D.H.; Bray, B.; Carter, P.; Dvoredsky, A.; Filippone, B.W.; Korsch, W.; McIlhany, K.; McKeown, R.D.; Pitt, M.; Brack, J.; Fox, B.; Kinney, E.; Rakness, G.; Ristinen, R.; Ackerstaff, K.; Funk, M.; Holler, Y.; Ihssen, H.; Meyners, N.; Schueler, K.P.; Sinram, K.; Spengos, M.; Woller, K.; Zapfe-Dueren, K.; Boettcher, H.; Borissov, A.; Brons, S.; Gaerber, Y.; Hasch, D.; Korotkov, V.; Meissner, F.; Nowak, W.; Roloff, H.; Schwind, A.; Stoesslein, U.; Fechtchenko, A.; Gagunashvili, N.D.; Krivokhijine, V.G.; Mitsyn, V.; Nagaitsev, A.; Savin, I.; Shutov, V.; Benisch, T.; Bernreuther, S.; Braun, B.; Dueren, M.; Ferstl, M.; Fiedler, K.; Grosshauser, C.; Gute, A.; Henoch, M.; Lachnit, W.; Neunreither, F.; Rith, K.; Schmidt, F.; Steffens, E.; Stenger, J.; Stock, F.; Wander, W.; Dalpiaz, P.F.; Frabetti, S.; Masoli, F.; Reali, A.; Simani, C.; Slavich, P.; Avakian, H.; Bianchi, N.; Capitani, G.P.; De Sanctis, E.; Di Nezza, P.; Fantoni, A.; Giordjian, V.; Mozzetti, R.; Muccifora, V.; Nupieri, M.; Reolon, A.R.; Rossi, P.; Slavich, P.; Kramer, L.1999
AbstractAbstract
[en] Spin-polarized atomic hydrogen is used as a gaseous polarized-proton target in high-energy and nuclear-physics experiments operating with internal beams in storage rings. When such beams are intense and bunched, this type of target can be depolarized by a resonant interaction with the transient magnetic field generated by the beam bunches. This effect has been studied with the HERA positron beam in the HERMES experiment at DESY. Resonances have been observed and a simple analytic model has been used to explain their shape and position. Operating conditions for the experiment have been found where there is no significant target depolarization due to this effect. copyright 1999 The American Physical Society
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Journal Article
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Galumian, P.; Green, P.W.; Greeniaus, L.G.; Kitching, P.; Martens, F.K.; Miller, C.A.; Gao, H.; Hansen, J.; Jackson, H.E.; Jones, C.; Makins, N.C.; ONeill, T.G.; Potterveld, D.H.; Bray, B.; Carter, P.; Dvoredsky, A.; Filippone, B.W.; Korsch, W.; Lung, A.; McIlhany, K.; McKeown, R.D.; Pitt, M.; Belz, J.E.; Brack, J.; Ely, J.; Fox, B.; Kinney, E.; Mercer, D.; Rakness, G.; Ristinen, R.; Ackerstaff, K.; Funk, M.; Holler, Y.; Ihssen, H.; Meyners, N.; Roeper, G.; Schueler, K.P.; Sinram, K.; Spengos, M.; Woller, K.; Zapfe-Dueren, K.; Akushevich, I.; Aschenauer, E.C.; Boettcher, H.; Borissov, A.; Brons, S.; Gaerber, Y.; Hasch, D.; Korotkov, V.; Krause, B.; Meissner, F.; Nowak, W.; Roloff, H.; Schwind, A.; Stoesslein, U.; Fechtchenko, A.; Gagunashvili, N.D.; Krivokhijine, V.G.; Mitsyn, V.; Nagaitsev, A.; Savin, I.; Shutov, V.; Benisch, T.; Bernreuther, S.; Braun, B.; Dueren, M.; Ferstl, M.; Fiedler, K.; Grosshauser, C.; Gute, A.; Henoch, M.; Kirsch, M.; Lachnit, W.; Neunreither, F.; Rith, K.; Schmidt, F.; Steffens, E.; Stenger, J.; Stock, F.; Wander, W.; Woelfel, T.; Dalpiaz, P.F.; Frabetti, S.; Masoli, F.; Reali, A.; Simani, C.; Slavich, P.; Avakian, H.; Bianchi, N.; Capitani, G.P.; De Sanctis, E.; Di Nezza, P.; Fantoni, A.; Giordjian, V.; Gyurjyan, V.1999
AbstractAbstract
[en] Exclusive incoherent electroproduction of the ρ0 number-sign< fence lpost='(' rpost=')' style='single'>770 meson from 1H , number-sign< hspace space='-0.167'>2H , number-sign< hspace space='-0.167'>3He , and number-sign< hspace space='-0.167'>14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q2>0.4 GeV2 and positron energy loss ν from 9 to 20 GeV. The ratio of the number-sign< hspace space='-0.167'>14N to number-sign< hspace space='-0.167'>1H cross sections per nucleon, known as the nuclear transparency, was found to decrease with increasing coherence length of quark-antiquark fluctuations of the virtual photon. The data provide clear evidence of the interaction of the quark-antiquark fluctuations with the nuclear medium. copyright 1999 The American Physical Society
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Journal Article
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BARYONS, BOSONS, CATIONS, CHARGED PARTICLES, ELEMENTARY PARTICLES, ELEMENTS, FERMIONS, HADRONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, INTERACTIONS, IONS, ISOTOPES, LEPTON REACTIONS, LIGHT NUCLEI, MATTER, MESONS, NITROGEN ISOTOPES, NONMETALS, NUCLEAR REACTIONS, NUCLEI, NUCLEONS, ODD-ODD NUCLEI, PARTICLE INTERACTIONS, STABLE ISOTOPES, VECTOR MESONS
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Adloff, C.; Andreev, V.; Andrieu, B.; Arkadov, V.; Astvatsatourov, A.; Ayyaz, I.; Babaev, A.; Baehr, J.; Baranov, P.; Barrelet, E.; Bartel, W.; Bassler, U.; Bate, P.; Beglarian, A.; Behnke, O.; Behrend, H.-J.; Beier, C.; Belousov, A.; Berger, Ch.; Bernardi, G.; Berndt, T.; Bertrand-Coremans, G.; Biddulph, P.; Bizot, J.C.; Boudry, V.; Braunschweig, W.; Brisson, V.; Brown, D.P.; Brueckner, W.; Bruel, P.; Bruncko, D.; Buerger, J.; Buesser, F.W.; Buniatian, A.; Burke, S.; Buschhorn, G.; Calvet, D.; Campbell, A.J.; Carli, T.; Chabert, E.; Charlet, M.; Clarke, D.; Clerbaux, B.; Cocks, S.; Contreras, J.G.; Cormack, C.; Coughlan, J.A.; Cousinou, M.-C.; Cox, B.E.; Cozzika, G.; Cvach, J.; Dainton, J.B.; Dau, W.D.; Daum, K.; David, M.; Davidsson, M.; De Roeck, A.; De Wolf, E.A.; Delcourt, B.; Demirchyan, R.; Diaconu, C.; Dirkmann, M.; Dixon, P.; Dlugosz, W.; Donovan, K.T.; Dowell, J.D.; Droutskoi, A.; Ebert, J.; Eckerlin, G.; Eckstein, D.; Efremenko, V.; Egli, S.; Eichler, R.; Eisele, F.; Eisenhandler, E.; Elsen, E.; Enzenberger, M.; Erdmann, M.; Farh, A.B.; Favart, L.; Fedotov, A.; Felst, R.; Feltesse, J.; Ferencei, J.; Ferrarotto, F.; Fleischer, M.; Fluegge, G.; Fomenko, A.; Formanek, J.; Foster, J.M.; Franke, G.; Gabathuler, E.; Gabathuler, K.; Gaede, F.; Garvey, J.; Gassner, J.; Gayler, J.; Gerhards, R.; Ghazaryan, S.; Glazov, A.; Goerlich, L.; Gogitidze, N.; Goldberg, M.; Gorelov, I.; Grab, C.; Graessler, H.; Greenshaw, T.; Griffiths, R.K.; Grindhammer, G.; Hadig, T.; Haidt, D.; Hajduk, L.; Hampel, M.; Haustein, V.; Haynes, W.J.; Heinemann, B.; Heinzelmann, G.; Henderson, R.C.W.; Hengstmann, S.; Henschel, H.; Heremans, R.; Herynek, I.; Hewitt, K.; Hiller, K.H.; Hilton, C.D.; Hladky, J.; Hoffmann, D.; Holtom, T.; Horisberger, R.; Hurling, S.; Ibbotson, M.; Issever, C.; Jacquet, M.; Jaffre, M.; Jansen, D.M.; Joensson, L.; Johnson, D.P.; Jung, H.; Kaestli, H.K.; Kander, M.; Kant, D.; Kapichine, M.; Karlsson, M.; Karschnik, O.; Katzy, J.; Kaufmann, O.; Kausch, M.; Keller, N.; Kenyon, I.R.; Kermiche, S.; Keuker, C.; Kiesling, C.; Klein, M.; Kleinwort, C.; Knies, G.; Koehne, J.H.; Kolanoski, H.; Kolya, S.D.; Korbel, V.; Kostka, P.; Kotelnikov, S.K.; Kraemerkaemper, T.; Krasny, M.W.; Krehbiel, H.; Kruecker, D.; Krueger, K.; Kuepper, A.; Kuester, H.; Kuhlen, M.; Kurca, T.; Lachnit, W.; Lahmann, R.; Lamb, D.; Landon, M.P.J.; Lange, W.; Langenegger, U.; Lebedev, A.; Lehner, F.; Lemaitre, V.; Lemrani, R.; Lendermann, V.; Levonian, S.; Lindstroem, M.; Lobo, G.; Lobodzinska, E.; Lubimov, V.; Lueders, S.; Lueke, D.; Lytkin, L.; Magnussen, N.; Mahlke-Krueger, H.; Malden, N.; Malinovsky, E.; Malinovski, I.; Maracek, R.; Marage, P.; Marks, J.; Marshall, R.; Martyn, H.-U.; Martyniak, J.; Maxfield, S.J.; McMahon, S.J.; McMahon, T.R.; Mehta, A.; Meier, K.; Merkel, P.; Metlica, F.; Meyer, A.; Meyer, A.; Meyer, H.; Meyer, J.; Meyer, P.-O.; Mikocki, S.; Milstead, D.; Mohr, R.; Mohrdieck, S.; Mondragon, M.; Moreau, F.; Morozov, A.; Morris, J.V.; Mueller, D.; Mueller, K.; Murin, P.; Nagovizin, V.; Naroska, B.; Naumann, J.; Naumann, Th.; Negri, I.; Newman, P.R.; Nguyen, H.K.; Nicholls, T.C.; Niebergall, F.; Niebuhr, C.; Niedzballa, Ch.; Niggli, H.; Nix, O.; Nowak, G.; Nunnemann, T.; Oberlack, H.; Olsson, J.E.; Ozerov, D.; Palmen, P.; Panassik, V.; Pascaud, C.; Passaggio, S.; Patel, G.D.; Pawletta, H.; Perez, E.; Phillips, J.P.; Pieuchot, A.; Pitzl, D.; Poeschl, R.; Pope, G.; Povh, B.; Rabbertz, K.; Rauschenberger, J.; Reimer, P.; Reisert, B.; Reyna, D.; Rick, H.; Riess, S.; Rizvi, E.; Robmann, P.; Roosen, R.; Rosenbauer, K.; Rostovtsev, A.; Rouse, F.; Royon, C.; Rusakov, S.; Rybicki, K.; Sankey, D.P.C.; Schacht, P.; Scheins, J.; Schilling, F.-P.; Schleif, S.; Schleper, P.; Schmidt, D.; Schmidt, D.; Schoeffel, L.; Schroeder, V.; Schultz-Coulon, H.-C.; Sefkow, F.; Semenov, A.; Shekelyan, V.; Sheviakov, I.; Shtarkov, L.N.; Siegmon, G.; Sirois, Y.; Sloan, T.; Smirnov, P.; Smith, M.; Solochenko, V.; Soloviev, Y.; Sonnenschein, L.; Spaskov, V.; Specka, A.; Spitzer, H.; Squinabol, F.; Stamen, R.; Steffen, P.; Steinberg, R.; Steinhart, J.; Stella, B.; Ste llberger, A.; Stiewe, J.; Straumann, U.; Struczinski, W.; Sutton, J.P.; Swart, M.; Tapprogge, S.; Tasevsky, M.; Tchernyshov, V.; Tchetchelnitski, S.; Theissen, J.; Thompson, G.; Thompson, P.D.; Tobien, N.; Todenhagen, R.; Traynor, D.; Truoel, P.; Tsipolitis, G.; Turnau, J.; Tzamariudaki, E.; Udluft, S.; Usik, A.; Valkar, S.; Valkarova, A.; Vallee, C.; Van Esch, P.; Van Haecke, A.; Van Mechelen, P.; Vazdik, Y.; Villet, G.; Wacker, K.; Wallny, R.; Walter, T.; Waugh, B.; Weber, G.; Weber, M.; Wegener, D.; Wegner, A.; Wengler, T.; Werner, M.; West, L.R.; Wiesand, S.; Wilksen, T.; Willard, S.; Winde, M.; Winter, G.-G.; Wissing, Ch.; Wittek, C.; Wittmann, E.; Wobisch, M.; Wollatz, H.; Wuensch, E.; Zacek, J.; Zalesak, J.; Zhang, Z.; Zhokin, A.; Zini, P.; Zomer, F.; Zsembery, J.; zur Nedden, M.1999
AbstractAbstract
[en] Internal jet structure in dijet production in deep-inelastic scattering is measured with the H1 detector at HERA. Jets with transverse energies ET,Breit > 5 GeV are selected in the Breit frame employing kperpendicular and cone jet algorithms. In the kinematic region of ssquared momentum transfers 10 < Q2 < or approx. s 120 GeV2 and Bjorken-x values 2 < 10-4 < or approx. xBj < or approx. 8 x 10-3, jet shapes and subjet multiplicities are measured as a function of a resolution parameter. Distributions of both observables are corrected for detector effects and presented as functions of the transverse jet energy and jet pseudo-rapidity. Dependences of the jet shape and the average number of subjets on the transverse energy and the pseudo-rapidity of the jet are observed. With increasing transverse jet energies and decreasing pseudo-rapidities, i.e. towards the photon hemisphere, the jets are more collimated. QCD models give a fair description of the data
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S0550321399001182; Copyright (c) 1999 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: Germany
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Journal Article
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Numerical Data
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BASIC INTERACTIONS, DATA, ELECTROMAGNETIC INTERACTIONS, ELECTRON-NUCLEON INTERACTIONS, ENERGY, ENERGY RANGE, GEV RANGE, INELASTIC SCATTERING, INFORMATION, INTERACTIONS, KINETIC ENERGY, LEPTON-BARYON INTERACTIONS, LEPTON-HADRON INTERACTIONS, LEPTON-NUCLEON INTERACTIONS, MATHEMATICAL MODELS, NUMERICAL DATA, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PRODUCTION, PARTICLE PROPERTIES, SCATTERING, SPECTRA
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