Flavor Decomposition of the Sea-Quark Helicity Distributions in the Nucleon from Semiinclusive Deep Inelastic Scattering

A. Airapetian, N. Akopov, Z. Akopov, M. Amarian, V. V. Ammosov, A. Andrus, E. C. Aschenauer, W. Augustyniak, R. Avakian, A. Avetissian, E. Avetissian, P. Bailey, V. Baturin, C. Baumgarten, M. Beckmann, S. Belostotski, S. Bernreuther, N. Bianchi, H. P. Blok, H. BöttcherA. Borissov, M. Bouwhuis, J. Brack, A. Brüll, V. Bryzgalov, G. P. Capitani, H. C. Chiang, G. Ciullo, M. Contalbrigo, P. F. Dalpiaz, R. de Leo, L. de Nardo, E. de Sanctis, E. Devitsin, P. di Nezza, M. Düren, M. Ehrenfried, A. Elalaoui-Moulay, G. Elbakian, F. Ellinghaus, U. Elschenbroich, J. Ely, R. Fabbri, A. Fantoni, A. Fechtchenko, L. Felawka, B. Fox, J. Franz, S. Frullani, Y. Gärber, G. Gapienko, V. Gapienko, F. Garibaldi, K. Garrow, E. Garutti, D. Gaskell, G. Gavrilov, V. Gharibyan, G. Graw, O. Grebeniouk, L. G. Greeniaus, K. Hafidi, M. Hartig, D. Hasch, D. Heesbeen, M. Henoch, R. Hertenberger, W. H.A. Hesselink, A. Hillenbrand, M. Hoek, Y. Holler, B. Hommez, G. Iarygin, A. Ivanilov, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, E. Kinney, A. Kisselev, K. Königsmann, M. Kopytin, V. Korotkov, V. Kozlov, B. Krauss, V. G. Krivokhijine, L. Lagamba, L. Lapikás, A. Laziev, P. Lenisa, P. Liebing, T. Lindemann, K. Lipka, W. Lorenzon, J. Lu, B. Maiheu, N. C.R. Makins, B. Marianski, H. Marukyan, F. Masoli, V. Mexner, N. Meyners, O. Mikloukho, C. A. Miller, Y. Miyachi, V. Muccifora, A. Nagaitsev, E. Nappi, Y. Naryshkin, A. Nass, M. Negodaev, W. D. Nowak, K. Oganessyan, H. Ohsuga, G. Orlandi, N. Pickert, S. Potashov, D. H. Potterveld, M. Raithel, D. Reggiani, P. E. Reimer, A. Reischl, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, L. Rubacek, D. Ryckbosch, Y. Salomatin, I. Sanjiev, I. Savin, C. Scarlett, A. Schäfer, C. Schill, G. Schnell, K. P. Schüler, A. Schwind, J. Seele, R. Seidl, B. Seitz, R. Shanidze, C. Shearer, T. A. Shibata, V. Shutov, M. C. Simani, K. Sinram, M. Stancari, M. Statera, E. Steffens, J. J.M. Steijger, J. Stewart, U. Stösslein, P. Tait, H. Tanaka, S. Taroian, B. Tchuiko, A. Terkulov, A. Tkabladze, A. Trzcinski, M. Tytgat, A. Vandenbroucke, P. van der Nat, G. van der Steenhoven, M. C. Vetterli, V. Vikhrov, M. G. Vincter, J. Visser, C. Vogel, M. Vogt, J. Volmer, C. Weiskopf, J. Wendland, J. Wilbert, G. Ybeles Smit, S. Yen, B. Zihlmann, H. Zohrabian, P. Zupranski

Research output: Contribution to journalArticlepeer-review

Abstract

The measurement of double-spin asymmetries of semiinclusive cross sections for the production of identified pions and kaons in deep inelastic scattering (DIS) of polarized positrons on a polarized deuterium target was presented. The (semi) inclusive virtual photoabsorption asymmetries A1h were derived from the lepton scattering asymmetries A h. The effects of internal quantum electron dynamics (QED) radiation and instrumental resolution were also simulated. The corrected semiinclusive asymmetries for the deuterium target were also shown. It was observed that the asymmetries sensitive to the helicity distribution require both the beam and target to be polarized.

Original languageEnglish (US)
Article number012005
Pages (from-to)120051-120055
Number of pages5
JournalPhysical review letters
Volume92
Issue number1
StatePublished - Jan 9 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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