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Single spin azimuthal asymmetries in electroproduction of neutral pions in semiinclusive deep inelastic scattering

Authors :
Airapetian, A.
Akopov, N.
Akopov, Z.
Amarian, M.
Aschenauer, E. C.
Avakian, H.
Avakian, R.
Avetissian, A.
Avetissian, E.
Bailey, P.
Bains, B.
Baturin, V.
Baumgarten, C.
Beckmann, M.
Belostotski, S.
Bernreuther, S.
Bianchi, N.
Bottcher, H.
Borissov, A.
Bouhali, O.
Bouwhuis, M.
Brack, J.
Brauksiepe, S.
Bruckner, W.
Brull, A.
Brunn, I.
Bulten, H. J.
Capitani, G. P.
Chumney, P.
Cisbani, E.
Ciullo, G.
Court, G. R.
Dalpiaz, P. F.
De Leo, R.
De Nardo, L.
De Sanctis, E.
De Schepper, D.
Devitsin, E.
De Witt Huberts, P. K. A.
Di Nezza, P.
Djordjadze, V.
Duren, M.
Ehrenfried, M.
Elbakian, G.
Ellinghaus, F.
Ely, J.
Fantoni, A.
Fechtchenko, A.
Felawka, L.
Filippone, B. W.
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, P. W.
Greeniaus, L. G.
Gute, A.
Haeberli, W.
Hafidi, K.
Hartig, M.
Hasch, D.
Heesbeen, D.
Heinsius, F. H.
Henoch, M.
Hertenberger, R.
Hesselink, W. H. A.
Hofman, G.
Holler, Y.
Holt, R. J.
Hommez, B.
Iarygin, G.
Izotov, A.
Jackson, H. E.
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.
Krauss, B.
Krivokhijine, V. G.
Kyle, G.
Lagamba, L.
Laziev, A.
Lenisa, P.
Liebing, P.
Lindemann, T.
Lorenzon, W.
Maas, A.
Makins, N. C. R.
Marukyan, H.
Masoli, F.
McAndrew, M.
McIlhany, K.
Meissner, F.
Menden, F.
Meyners, N.
Mikloukho, O.
Miller, C. A.
Milner, R.
Muccifora, V.
Mussa, R.
Nagaitsev, A.
Nappi, E.
Naryshkin, Y.
Nass, A.
Negodaeva, K.
Nowak, W.-D.
Oganessyan, K.
O'Neill, T. G.
Owen, B. R.
Pate, S. F.
Potashov, S.
Potterveld, D. H.
Raithel, M.
Rakness, G.
Rappoport, V.
Redwine, R.
Reggiani, D.
Reolon, A. R.
Rith, K.
Robinson, D.
Rostomyan, A.
Ruh, M.
Ryckbosch, D.
Sakemi, Y.
Sanjiev, I.
Sato, F.
Savin, I.
Scarlett, C.
Schafer, A.
Schill, C.
Schmidt, F.
Schnell, G.
Schuler, K. P.
Schwind, A.
Seibert, J.
Seitz, B.
Shibata, T.-A.
Shutov, V.
Simani, M. C.
Simon, A.
Sinram, K.
Steffens, E.
Steijger, J. J. M.
Stewart, J.
Stosslein, U.
Suetsugu, K.
Taroian, S.
Terkulov, A.
Teryaev, O.
Tessarin, S.
Thomas, E.
Tipton, B.
Tytgat, M.
Urciuoli, G. M.
Van Den Brand, J. F. J.
Van Der Steenhoven, G.
Van De Vyver, R.
Van Hunen, J. J.
Vetterli, M. C.
Vikhrov, V.
Vincter, M. G.
Visser, J.
Weiskopf, C.
Wendland, J.
Wilbert, J.
Wise, T.
Yen, S.
Yoneyama, S.
Zohrabian, H.
Publication Year :
2001
Publisher :
Deutsches Elektronen-Synchrotron, DESY, Hamburg, 2001.

Abstract

Physical review / D 64(9), 097101 (2001). doi:10.1103/PhysRevD.64.097101<br />A single-spin asymmetry in the azimuthal distribution of neutral pions relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. The analysing power in the sin(phi) moment of the cross section is 0.019 +/- 0.007(stat.) +/- 0.003(syst.). This result is compared to single-spin asymmetries for charged pion production measured in the same kinematic range. The pi^0 asymmetry is of the same size as the pi^+ asymmetry and shows a similar dependence on the relevant kinematic variables. The asymmetry is described by a phenomenological calculation based on a fragmentation function that represents sensitivity to the transverse polarization of the struck quark.<br />Published by Inst., Woodbury, NY

Subjects

Subjects :
positron p: deep inelastic scattering
polarization: longitudinal
HERMES
transverse momentum dependence
fragmentation function
energy dependence
x-dependence
DESY HERA Stor
27.5 GeV
p: polarized target
pi0: electroproduction
analyzing power
polarization: transverse
quark: polarization
spin: asymmetry
experimental results

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi...........da5f6dd089d864600dcd316f66ecd327
Full Text :
https://doi.org/10.3204/pubdb-2017-02186
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