Abstract
A single-spin asymmetry in the distribution of exclusively produced π + mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. Integrated over the experimental acceptance, the sin moment of the polarization asymmetry of the cross section is measured to be -0.18 ± 0.05(stat.) ± 0.02(syst.). The asymmetry is also studied as a function of the relevant kinematic variables, and its magnitude is found to grow with decreasing x and increasing -t and vanish at t → t min (where x is the Bjorken scaling variable and t is the squared four-momentum transferred to the nucleon).
| Original language | English |
|---|---|
| Pages (from-to) | 85-92 |
| Number of pages | 8 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 535 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 2002 May 23 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Single-spin azimuthal asymmetry in exclusive electroproduction of π + mesons. / Airapetian, A.; Akopov, N.; Akopov, Z.; Amarian, M.; Aschenauer, E. C.; Avakian, H.; Avakian, R.; Avetissian, A.; Avetissian, E.; Bailey, P.; Baturin, V.; Baumgarten, C.; Beckmann, M.; Belostotski, S.; Bernreuther, S.; Bianchi, N.; Böttcher, H.; Borissov, A.; Bouhali, O.; Bouwhuis, M.; Brack, J.; Brauksiepe, S.; Brüll, 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.; Düren, M.; Ehrenfried, M.; Elbakian, G.; Ellinghaus, F.; Ely, J.; Fabbri, R.; Fantoni, A.; Fechtchenko, A.; Felawka, L.; Filippone, B. W.; Fischer, H.; Fox, B.; Franz, J.; Frullani, S.; Gärber, Y.; Garibaldi, F.; Garutti, E.; Gavrilov, G.; Gharibyan, V.; 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.; Kisselev, A.; Kitching, P.; Königsmann, 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.; McIlhany, K.; Meissner, F.; Menden, F.; Mexner, V.; Meyners, N.; Mikloukho, O.; Milner, R.; Muccifora, V.; 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.; Podiatchev, S.; Potashov, S.; Potterveld, D. H.; Raithel, M.; Rakness, G.; Rappoport, V.; Redwine, R.; Reggiani, D.; Reimer, P.; Reolon, A. R.; Rith, K.; Robinson, D.; Rostomyan, A.; Ryckbosch, D.; Sakemi, Y.; Sanjiev, I.; Sato, F.; Savin, I.; Scarlett, C.; Schäfer, A.; Schill, C.; Schmidt, F.; Schnell, G.; Schüler, 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.; Stösslein, U.; Suetsugu, K.; Taroian, S.; Terkulov, A.; 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.; Vetterli, M. C.; Vikhrov, V.; Vincter, M. G.; Visser, J.; Volmer, J.; Weiskopf, C.; Wendland, J.; Wilbert, J.; Wise, T.; Yen, S.; Yoneyama, S.; Zohrabian, H.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 535, No. 1-4, 23.05.2002, p. 85-92.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Single-spin azimuthal asymmetry in exclusive electroproduction of π + mesons
AU - Airapetian, A.
AU - Akopov, N.
AU - Akopov, Z.
AU - Amarian, M.
AU - Aschenauer, E. C.
AU - Avakian, H.
AU - Avakian, R.
AU - Avetissian, A.
AU - Avetissian, E.
AU - Bailey, P.
AU - Baturin, V.
AU - Baumgarten, C.
AU - Beckmann, M.
AU - Belostotski, S.
AU - Bernreuther, S.
AU - Bianchi, N.
AU - Böttcher, H.
AU - Borissov, A.
AU - Bouhali, O.
AU - Bouwhuis, M.
AU - Brack, J.
AU - Brauksiepe, S.
AU - Brüll, A.
AU - Brunn, I.
AU - Bulten, H. J.
AU - Capitani, G. P.
AU - Chumney, P.
AU - Cisbani, E.
AU - Ciullo, G.
AU - Court, G. R.
AU - Dalpiaz, P. F.
AU - De Leo, R.
AU - De Nardo, L.
AU - De Sanctis, E.
AU - De Schepper, D.
AU - Devitsin, E.
AU - de Witt Huberts, P. K.A.
AU - Di Nezza, P.
AU - Düren, M.
AU - Ehrenfried, M.
AU - Elbakian, G.
AU - Ellinghaus, F.
AU - Ely, J.
AU - Fabbri, R.
AU - Fantoni, A.
AU - Fechtchenko, A.
AU - Felawka, L.
AU - Filippone, B. W.
AU - Fischer, H.
AU - Fox, B.
AU - Franz, J.
AU - Frullani, S.
AU - Gärber, Y.
AU - Garibaldi, F.
AU - Garutti, E.
AU - Gavrilov, G.
AU - Gharibyan, V.
AU - Graw, G.
AU - Grebeniouk, O.
AU - Green, P. W.
AU - Greeniaus, L. G.
AU - Gute, A.
AU - Haeberli, W.
AU - Hafidi, K.
AU - Hartig, M.
AU - Hasch, D.
AU - Heesbeen, D.
AU - Heinsius, F. H.
AU - Henoch, M.
AU - Hertenberger, R.
AU - Hesselink, W. H.A.
AU - Hofman, G.
AU - Holler, Y.
AU - Holt, R. J.
AU - Hommez, B.
AU - Iarygin, G.
AU - Izotov, A.
AU - Jackson, H. E.
AU - Jgoun, A.
AU - Jung, P.
AU - Kaiser, R.
AU - Kisselev, A.
AU - Kitching, P.
AU - Königsmann, K.
AU - Kolster, H.
AU - Korotkov, V.
AU - Kotik, E.
AU - Kozlov, V.
AU - Krauss, B.
AU - Krivokhijine, V. G.
AU - Kyle, G.
AU - Lagamba, L.
AU - Laziev, A.
AU - Lenisa, P.
AU - Liebing, P.
AU - Lindemann, T.
AU - Lorenzon, W.
AU - Maas, A.
AU - Makins, N. C.R.
AU - Marukyan, H.
AU - Masoli, F.
AU - McIlhany, K.
AU - Meissner, F.
AU - Menden, F.
AU - Mexner, V.
AU - Meyners, N.
AU - Mikloukho, O.
AU - Milner, R.
AU - Muccifora, V.
AU - Nagaitsev, A.
AU - Nappi, E.
AU - Naryshkin, Y.
AU - Nass, A.
AU - Negodaeva, K.
AU - Nowak, W. D.
AU - Oganessyan, K.
AU - O'Neill, T. G.
AU - Owen, B. R.
AU - Pate, S. F.
AU - Podiatchev, S.
AU - Potashov, S.
AU - Potterveld, D. H.
AU - Raithel, M.
AU - Rakness, G.
AU - Rappoport, V.
AU - Redwine, R.
AU - Reggiani, D.
AU - Reimer, P.
AU - Reolon, A. R.
AU - Rith, K.
AU - Robinson, D.
AU - Rostomyan, A.
AU - Ryckbosch, D.
AU - Sakemi, Y.
AU - Sanjiev, I.
AU - Sato, F.
AU - Savin, I.
AU - Scarlett, C.
AU - Schäfer, A.
AU - Schill, C.
AU - Schmidt, F.
AU - Schnell, G.
AU - Schüler, K. P.
AU - Schwind, A.
AU - Seibert, J.
AU - Seitz, B.
AU - Shibata, T. A.
AU - Shutov, V.
AU - Simani, M. C.
AU - Simon, A.
AU - Sinram, K.
AU - Steffens, E.
AU - Steijger, J. J.M.
AU - Stewart, J.
AU - Stösslein, U.
AU - Suetsugu, K.
AU - Taroian, S.
AU - Terkulov, A.
AU - Tessarin, S.
AU - Thomas, E.
AU - Tipton, B.
AU - Tytgat, M.
AU - Urciuoli, G. M.
AU - van den Brand, J. F.J.
AU - van der Steenhoven, G.
AU - van de Vyver, R.
AU - Vetterli, M. C.
AU - Vikhrov, V.
AU - Vincter, M. G.
AU - Visser, J.
AU - Volmer, J.
AU - Weiskopf, C.
AU - Wendland, J.
AU - Wilbert, J.
AU - Wise, T.
AU - Yen, S.
AU - Yoneyama, S.
AU - Zohrabian, H.
N1 - Funding Information: We thank M. Diehl, M. Guidal, D. Müller, G. Piller, M.V. Polyakov, M. Strikman, and O. Teryaev for many interesting discussions on this subject. We gratefully acknowledge the DESY management for its support and the DESY staff and the staffs of the collaborating institutions. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the INTAS and TMR network contributions from the European Community; the German Bundesministerium für Bildung und Forschung; the Deutsche Forschungsgemeinschaft (DFG); the Deutscher Akademischer Austauschdienst (DAAD); the Italian Istituto Nazionale di Fisica Nucleare (INFN); Monbusho International Scientific Research Program, JSPS, and Toray Science Foundation of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the UK Particle Physics and Astronomy Research Council; and the US Department of Energy and National Science Foundation.
PY - 2002/5/23
Y1 - 2002/5/23
N2 - A single-spin asymmetry in the distribution of exclusively produced π + mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. Integrated over the experimental acceptance, the sin moment of the polarization asymmetry of the cross section is measured to be -0.18 ± 0.05(stat.) ± 0.02(syst.). The asymmetry is also studied as a function of the relevant kinematic variables, and its magnitude is found to grow with decreasing x and increasing -t and vanish at t → t min (where x is the Bjorken scaling variable and t is the squared four-momentum transferred to the nucleon).
AB - A single-spin asymmetry in the distribution of exclusively produced π + mesons azimuthally around the virtual photon direction relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. Integrated over the experimental acceptance, the sin moment of the polarization asymmetry of the cross section is measured to be -0.18 ± 0.05(stat.) ± 0.02(syst.). The asymmetry is also studied as a function of the relevant kinematic variables, and its magnitude is found to grow with decreasing x and increasing -t and vanish at t → t min (where x is the Bjorken scaling variable and t is the squared four-momentum transferred to the nucleon).
UR - http://www.scopus.com/inward/record.url?scp=0037161931&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037161931&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(02)01780-X
DO - 10.1016/S0370-2693(02)01780-X
M3 - Article
AN - SCOPUS:0037161931
VL - 535
SP - 85
EP - 92
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-4
ER -