/ Experiment-HEP hep-ex/0408013


Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target


Airapetian, A. (Michigan U.) ; Akopov, N. (Yerevan Phys. Inst.) ; Akopov, Z. (Yerevan Phys. Inst.) ; Amarian, M. (Yerevan Phys. Inst.) ; Andrus, A. (Illinois U., Urbana) ; Aschenauer, E.C. (DESY, Zeuthen) ; Augustyniak, W. (Warsaw, Inst. Nucl. Studies) ; Avakian, R. (Yerevan Phys. Inst.) ; Avetissian, A. (Yerevan Phys. Inst.) ; Avetissian, E. (Frascati) ; Bacchetta, A. (Regensburg U.) ; Bailey, P. (Illinois U., Urbana) ; Balin, D. (St. Petersburg, INP) ; Beckmann, M. (DESY) ; Belostotski, S. (St. Petersburg, INP) ; Bianchi, N. (Frascati) ; Blok, H.P. (Vrije U., Amsterdam) ; Bottcher, H. (DESY, Zeuthen) ; Borissov, A. (Glasgow U.) ; Borysenko, A. (Frascati) ; Bouwhuis, M. (Illinois U., Urbana) ; Brull, A. (MIT, LNS) ; Bryzgalov, V. (Serpukhov, IHEP) ; Capitani, G.P. (Frascati) ; Cappiluppi, M. (Ferrara U.) ; Chen, T. (Peking U.) ; Ciullo, G. (Ferrara U.) ; Contalbrigo, M. (Ferrara U.) ; Dalpiaz, P.F. (Ferrara U.) ; De Leo, R. (NONE -) ; Demey, M. (NIKHEF, Amsterdam) ; De Nardo, L. (Alberta U.) ; De Sanctis, E. (Frascati) ; Devitsin, E. (Lebedev Inst.) ; Di Nezza, P. (Frascati) ; Duren, M. (Giessen U.) ; Ehrenfried, M. (Erlangen - Nuremberg U.) ; Elalaoui-Moulay, A. (Argonne) ; Elbakian, G. (Yerevan Phys. Inst.) ; Ellinghaus, F. (DESY, Zeuthen) ; Elschenbroich, U. (Gent U.) ; Fabbri, R. (NIKHEF, Amsterdam) ; Fantoni, A. (Frascati) ; Fechtchenko, A. (Dubna, JINR) ; Felawka, L. (TRIUMF) ; Frullani, S. (Rome, ISS) ; Gapienko, G. (Serpukhov, IHEP) ; Gapienko, V. (Serpukhov, IHEP) ; Garibaldi, F. (Rome, ISS) ; Garrow, K. (TRIUMF) ; Gavrilov, G. (TRIUMF) ; Gharibyan, V. (Yerevan Phys. Inst.) ; Grebeniouk, O. (St. Petersburg, INP) ; Gregor, I.M. (DESY, Zeuthen) ; Hadjidakis, C. (Frascati) ; Hafidi, K. (Argonne) ; Hartig, M. (Giessen U.) ; Hasch, D. (Frascati) ; Henoch, M. (Erlangen - Nuremberg U.) ; Hesselink, W.H.A. (Vrije U., Amsterdam) ; Hillenbrand, A. (Erlangen - Nuremberg U.) ; Hoek, M. (Giessen U.) ; Holler, Y. (DESY) ; Hommez, B. (Gent U.) ; Hristova, I. (DESY, Zeuthen) ; Iarygin, G. (Dubna, JINR) ; Ilyichev, A. (DESY) ; Ivanilov, A. (Serpukhov, IHEP) ; Izotov, A. (St. Petersburg, INP) ; Jackson, H.E. (Argonne) ; Jgoun, A. (St. Petersburg, INP) ; Kaiser, R. (Glasgow U.) ; Kinney, E. (Colorado U.) ; Kisselev, A. (Colorado U.) ; Kobayashi, T. (Tokyo Inst. Tech.) ; Kopytin, M. (DESY, Zeuthen) ; Korotkov, V. (Serpukhov, IHEP) ; Kozlov, V. (Lebedev Inst.) ; Krauss, B. (Erlangen - Nuremberg U.) ; Krivokhijine, V.G. (Dubna, JINR) ; Lagamba, L. (NONE -) ; Lapikas, L. (NIKHEF, Amsterdam) ; Laziev, A. (Vrije U., Amsterdam) ; Lenisa, P. (Ferrara U.) ; Liebing, P. (DESY, Zeuthen) ; Linden-Levy, L.A. (Illinois U., Urbana) ; Lorenzon, W. (Michigan U.) ; Lu, H. (Hefei, CUST) ; Lu, J. (TRIUMF) ; Lu, S. (Giessen U.) ; Ma, B.Q. (Peking U.) ; Maiheu, B. (Gent U.) ; Makins, N.C.R. (Illinois U., Urbana) ; Mao, Y. (Peking U.) ; Marianski, B. (Warsaw, Inst. Nucl. Studies) ; Marukyan, H. (Yerevan Phys. Inst.) ; Masoli, F. (Ferrara U.) ; Mexner, V. (NIKHEF, Amsterdam) ; Meyners, N. (DESY) ; Michler, T. (Erlangen - Nuremberg U.) ; Mikloukho, O. (St. Petersburg, INP) ; Miller, C.A. (TRIUMF) ; Miyachi, Y. (Tokyo Inst. Tech.) ; Muccifora, V. (Frascati) ; Nagaitsev, A. (Dubna, JINR) ; Nappi, E. (NONE -) ; Naryshkin, Y. (St. Petersburg, INP) ; Nass, A. (Erlangen - Nuremberg U.) ; Negodaev, M. (DESY, Zeuthen) ; Nowak, W.D. (DESY, Zeuthen) ; Oganessyan, K. (Frascati) ; Ohsuga, H. (Tokyo Inst. Tech.) ; Osborne, A. (Glasgow U.) ; Pickert, N. (Erlangen - Nuremberg U.) ; Potterveld, D.H. (Argonne) ; Raithel, M. (Erlangen - Nuremberg U.) ; Reggiani, D. (Ferrara U.) ; Reimer, P.E. (Argonne) ; Reischl, A. (NIKHEF, Amsterdam) ; Reolon, A.R. (Frascati) ; Riedl, C. (Erlangen - Nuremberg U.) ; Rith, K. (Erlangen - Nuremberg U.) ; Rosner, G. (Glasgow U.) ; Rostomyan, A. (Yerevan Phys. Inst.) ; Rubacek, L. (Giessen U.) ; Rubin, J. (Illinois U., Urbana) ; Ryckbosch, D. (Gent U.) ; Salomatin, Y. (Serpukhov, IHEP) ; Sanjiev, I. (St. Petersburg, INP) ; Savin, Igor A. (Dubna, JINR) ; Schafer, A. (Regensburg U.) ; Schill, C. (Frascati) ; Schnell, G. (Tokyo Inst. Tech.) ; Schuler, K.P. (DESY) ; Seele, J. (Illinois U., Urbana) ; Seidl, R. (Erlangen - Nuremberg U.) ; Seitz, B. (Giessen U.) ; Shanidze, R. (Erlangen - Nuremberg U.) ; Shearer, C. (Glasgow U.) ; Shibata, T.A. (Tokyo Inst. Tech.) ; Shutov, V. (Dubna, JINR) ; Sinram, K. (DESY) ; Sommer, W. (Giessen U.) ; Stancari, M. (Ferrara U.) ; Statera, M. (Ferrara U.) ; Steffens, E. (Erlangen - Nuremberg U.) ; Steijger, J.J.M. (NIKHEF, Amsterdam) ; Stenzel, H. (Giessen U.) ; Stewart, J. (DESY, Zeuthen) ; Stinzing, F. (Erlangen - Nuremberg U.) ; Tait, P. (Erlangen - Nuremberg U.) ; Tanaka, H. (Tokyo Inst. Tech.) ; Taroian, S. (Yerevan Phys. Inst.) ; Tchuiko, B. (Serpukhov, IHEP) ; Terkulov, A. (Lebedev Inst.) ; Trzcinski, A. (Warsaw, Inst. Nucl. Studies) ; Tytgat, M. (Gent U.) ; Vandenbroucke, A. (Gent U.) ; van der Nat, P.B. (NIKHEF, Amsterdam) ; van der Steenhoven, G. (NIKHEF, Amsterdam) ; van Haarlem, Y. (Gent U.) ; Vetterli, M.C. (TRIUMF) ; Vikhrov, V. (St. Petersburg, INP) ; Vincter, M.G. (Alberta U.) ; Vogel, C. (Erlangen - Nuremberg U.) ; Volmer, J. (DESY, Zeuthen) ; Wang, S. (Hefei, CUST) ; Wendland, J. (TRIUMF) ; Wilbert, J. (Erlangen - Nuremberg U.) ; Ybeles Smit, G. (Vrije U., Amsterdam) ; Ye, Y. (Hefei, CUST) ; Ye, Z. (Hefei, CUST) ; Yen, S. (TRIUMF) ; Zihlmann, B. (Gent U.) ; Zupranski, P. (Warsaw, Inst. Nucl. Studies)

Published in: Phys.Rev.Lett.
Year: 2005
Vol.: 94
Page No: 012002

Abstract: Single-spin asymmetries for semi-inclusive electroproduction of charged pions in deep-inelastic scattering of positrons are measured for the first time with transverse target polarization. The asymmetry depends on the azimuthal angles of both the pion ($\phi$) and the target spin axis ($\phi_S$) about the virtual photon direction and relative to the lepton scattering plane. The extracted Fourier component $\cmpi$ is a signal of the previously unmeasured quark transversity distribution, in conjunction with the so-called Collins fragmentation function, also unknown. The Fourier component $\smpi$ of the asymmetry arises from a correlation between the transverse polarization of the target nucleon and the intrinsic transverse momentum of quarks, as represented by the previously unmeasured Sivers distribution function. Evidence for both signals is observed, but the Sivers asymmetry may be affected by exclusive vector meson production

Keyword(s): deep inelastic scattering ; polarisation in elementary particle interactions ; positrons

Web-Page: http://www.adsabs.harvard.edu/abs/2005PhRvL..94a2002A; http://dx.doi.org/10.1103/PhysRevLett.94.012002; http://link.aps.org/abstract/PRL/V94/E012002

Total numbers of views: 1818
Numbers of unique views: 744
e-proceeding
 Record created 2010-10-28, last modified 2014-01-30


External links:
Download fulltextADSABS
Download fulltextDOI
Download fulltextPRLTA
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)