Hadron formation in deep-inelastic positron scattering in a nuclear environment

Authors
Airapetian, A Akopov, N Akopov, Z Akushevich, I Amarian, M Arrington, J Aschenauer, EC Avakian, H Avakian, R Avetissia, A Avetissian, E Bailey, P Bains, B Baumgarten, C Beckmann, M Belostotski, S Bernreuther, S Bianchi, N Bottcher, H Borissov, A Bouwhuis, M Brack, J Brauksiepe, S Braun, B Bruckner, W Brull, A Budz, P Bulten, HJ Capitani, GP Carter, P Chumney, P Cisbani, E Court, GR Dalpiaz, PF De Leo, R De Nardo, L De Sanctis, E De Schepper, D Devitsin, E Huberts, PKAD Di Nezza, P Djordjadze, V Duren, M Dvoredsky, A Elbakian, G Ely, J Fantoni, A Fechtchenko, A Felawka, L Ferro-Luzzi, M Fiedler, K Filippone, BW Fischer, H Fox, B Franz, J Frullani, S Garber, Y Garibaldi, F Garutti, E Gavrilov, G Gharibyan, V Golendukhin, A Graw, G Grebeniouk, O Green, PW Greeniaus, LG Gute, A Haeberli, W Hartig, M Hasch, D Heesbeen, D Heinsius, FH Henoch, M Hertenberger, R Hesselink, WHA Hofman, G Holler, Y Holt, RJ Hommez, B Iarygin, G Iodice, M Izotov, A Jackson, HE Jgoun, A Jung, P Kaiser, R Kanesaka, J Kinney, E Kisselev, A Kitching, P Kobayashi, H Koch, N Konigsmann, K Kolster, H Korotkov, V Kotik, E Kozlov, V Krivokhijine, VG Kyle, G Lagamba, L Laziev, A Lenisa, P Lindemann, T Lorenzon, W Makins, NCR Martin, JW Marukyan, H Masoli, F McAndrew, M McIlhany, K McKeown, RD Meissner, F Menden, F Metz, A Meyners, N Mikloukho, O Miller, CA Milner, R Muccifora, V Mussa, R Nagaitsev, A Nappi, E Naryshkin, Y Nass, A Negodaeva, K Nowak, WD Oganessyan, K O'Neill, TG Openshaw, R Ouyang, J Owen, BR Pate, SF Potashov, S Potterveld, DH Rakness, G Rappoport, V Redwine, R Reggiani, D Reolon, AR Ristinen, R Rith, K Robinson, D Rostonivan, A Ruh, M Ryckbosch, D Sakemi, Y Sato, T Savin, I Scarlett, C Schafer, A Schill, C Schmidt, F Schnell, G Schuler, KP Sebwind, A Seibert, J Seitz, J Shibata, TA Shin, T Shutov, V Simani, MC Simon, A Sinram, K Steffens, E Steijger, JJM Stewart, J Stosslein, U Suetsugu, K Sutter, M Taroian, S Terkulov, A Tessarin, S Thomas, E Tipton, B Tytgat, M Urciuoli, G van den Brand, JFJ van der Steenhoven, G van de Vyver, R van Hunen, JJ Vetterli, MC Vikhrov, V Vincter, MG Visser, J Volk, E Weiskopf, C Wendland, J Wilbert, J Wise, T Yen, S Yoneyama, S Zohrabian, H
Citation
A. Airapetian et al., Hadron formation in deep-inelastic positron scattering in a nuclear environment, EUR PHY J C, 20(3), 2001, pp. 479-486
Citations number
38
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
20
Issue
3
Year of publication
2001
Pages
479 - 486
Database
ISI
SICI code
1434-6044(200105)20:3<479:HFIDPS>2.0.ZU;2-8
Abstract
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES ex periment at DESY using a 27.5 GeV positron beam. The differential multiplic ity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photo n energy nu and the fraction z of this energy transferred to the hadron. Th ere are observed substantial reductions of the multiplicity ratio R-M(h) at low nu and at high z, both of which are well described by a gluon-bremsstr ahlung model of hadronization. A significant difference of the nu -dependen ce of R-M(h) is found between positive and negative A hadrons. This is inte rpreted in terms of a difference between the formation times of protons and pions, using a phenomenological model to describe the nu- and z-dependence of R-M(h).