Beam-spin asymmetries in the azimuthal distribution of pion electroproduction

A. Airapetian; Z. Akopov; M. Amarian; A. Andrus; E. C. Aschenauer; W. Augustyniak; H. Avakian; R. Avakian; A. Avetissian; E. Avetisyan; A. Bacchetta; P. Bailey; S. Belostotski; N. Bianchi; H. P. Blok; H. Böttcher; A. Borissov; A. Borysenko; A. Brüll; V. Bryzgalov; M. Capiluppi; G. P. Capitani; G. Ciullo; M. Contalbrigo; P. F. Dalpiaz; W. Deconinck; R. De Leo; M. Demey; L. De Nardo; E. De Sanctis; E. Devitsin; M. Diefenthaler; P. Di Nezza; J. Dreschler; M. Düren; M. Ehrenfried; A. Elalaoui-Moulay; G. Elbakian; F. Ellinghaus; U. Elschenbroich; R. Fabbri; A. Fantoni; L. Felawka; S. Frullani; A. Funel; G. Gapienko; V. Gapienko; F. Garibaldi; K. Garrow; G. Gavrilov; V. Gharibyan; F. Giordano; O. Grebeniouk; I. M. Gregor; H. Guler; C. Hadjidakis; K. Hafidi; M. Hartig; D. Hasch; T. Hasegawa; W. H.A. Hesselink; A. Hillenbrand; M. Hoek; Y. Holler; B. Hommez; I. Hristova; G. Iarygin; A. Ivanilov; A. Izotov; H. E. Jackson; A. Jgoun; R. Kaiser; T. Keri; E. Kinney; A. Kisselev; T. Kobayashi; M. Kopytin; V. Korotkov; V. Kozlov; B. Krauss; P. Kravchenko; V. G. Krivokhijine; L. Lagamba; L. Lapikás; P. Lenisa; P. Liebing; L. A. Linden-Levy; W. Lorenzon; J. Lu; S. Lu; B. Q. Ma; B. Maiheu; N. C.R. Makins; Y. Mao; B. Marianski; H. Marukyan; F. Masoli; V. Mexner; N. Meyners; T. Michler; O. Mikloukho; C. A. Miller; Y. Miyachi; V. Muccifora; M. Murray; A. Nagaitsev; E. Nappi; Y. Naryshkin; M. Negodaev; W. D. Nowak; K. Oganessyan; H. Ohsuga; A. Osborne; R. Perez-Benito; N. Pickert; M. Raithel; D. Reggiani; P. E. Reimer; A. Reischl; A. R. Reolon; C. Riedl; K. Rith; G. Rosner; A. Rostomyan; L. Rubacek; J. Rubin; D. Ryckbosch; Y. Salomatin; I. Sanjiev; I. Savin; A. Schäfer; G. Schnell; K. P. Schüler; J. Seele; R. Seidl; B. Seitz; C. Shearer; T. A. Shibata; V. Shutov; K. Sinram; M. Stancari; M. Statera; E. Steffens; J. J.M. Steijger; H. Stenzel; J. Stewart; F. Stinzing; J. Streit; P. Tait; H. Tanaka; S. Taroian; B. Tchuiko; A. Terkulov; A. Trzcinski; M. Tytgat; A. Vandenbroucke; P. B. van der Nat; G. van der Steenhoven; Y. van Haarlem; V. Vikhrov; C. Vogel; S. Wang; Y. Ye; Z. Ye; S. Yen; B. Zihlmann; P. Zupranski

doi:10.1016/j.physletb.2007.03.015

Beam-spin asymmetries in the azimuthal distribution of pion electroproduction

A. Airapetian, Z. Akopov, M. Amarian, A. Andrus, E. C. Aschenauer, W. Augustyniak, H. Avakian, R. Avakian, A. Avetissian, E. Avetisyan, A. Bacchetta, P. Bailey, S. Belostotski, N. Bianchi, H. P. Blok, H. Böttcher, A. Borissov, A. Borysenko, A. Brüll, V. BryzgalovM. Capiluppi, G. P. Capitani, G. Ciullo, M. Contalbrigo, P. F. Dalpiaz, W. Deconinck, R. De Leo, M. Demey, L. De Nardo, E. De Sanctis, E. Devitsin, M. Diefenthaler, P. Di Nezza, J. Dreschler, M. Düren, M. Ehrenfried, A. Elalaoui-Moulay, G. Elbakian, F. Ellinghaus, U. Elschenbroich, R. Fabbri, A. Fantoni, L. Felawka, S. Frullani, A. Funel, G. Gapienko, V. Gapienko, F. Garibaldi, K. Garrow, G. Gavrilov, V. Gharibyan, F. Giordano, O. Grebeniouk, I. M. Gregor, H. Guler, C. Hadjidakis, K. Hafidi, M. Hartig, D. Hasch, T. Hasegawa, W. H.A. Hesselink, A. Hillenbrand, M. Hoek, Y. Holler, B. Hommez, I. Hristova, G. Iarygin, A. Ivanilov, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, T. Keri, E. Kinney, A. Kisselev, T. Kobayashi, M. Kopytin, V. Korotkov, V. Kozlov, B. Krauss, P. Kravchenko, V. G. Krivokhijine, L. Lagamba, L. Lapikás, P. Lenisa, P. Liebing, L. A. Linden-Levy, W. Lorenzon, J. Lu, S. Lu, B. Q. Ma, B. Maiheu, N. C.R. Makins, Y. Mao, B. Marianski, H. Marukyan, F. Masoli, V. Mexner, N. Meyners, T. Michler, O. Mikloukho, C. A. Miller, Y. Miyachi, V. Muccifora, M. Murray, A. Nagaitsev, E. Nappi, Y. Naryshkin, M. Negodaev, W. D. Nowak, K. Oganessyan, H. Ohsuga, A. Osborne, R. Perez-Benito, N. Pickert, M. Raithel, D. Reggiani, P. E. Reimer, A. Reischl, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, L. Rubacek, J. Rubin, D. Ryckbosch, Y. Salomatin, I. Sanjiev, I. Savin, A. Schäfer, G. Schnell, K. P. Schüler, J. Seele, R. Seidl, B. Seitz, C. Shearer, T. A. Shibata, V. Shutov, K. Sinram, M. Stancari, M. Statera, E. Steffens, J. J.M. Steijger, H. Stenzel, J. Stewart, F. Stinzing, J. Streit, P. Tait, H. Tanaka, S. Taroian, B. Tchuiko, A. Terkulov, A. Trzcinski, M. Tytgat, A. Vandenbroucke, P. B. van der Nat, G. van der Steenhoven, Y. van Haarlem, V. Vikhrov, C. Vogel, S. Wang, Y. Ye, Z. Ye, S. Yen, B. Zihlmann, P. Zupranski

Research output: Contribution to journal › Article › peer-review

Abstract

A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was performed using the HERMES spectrometer with a hydrogen gas target and the longitudinally polarized 27.6 GeV positron beam of HERA. The sinusoidal amplitude of the dependence of the asymmetry on the angle φ{symbol} of the hadron production plane around the virtual photon direction relative to the lepton scattering plane was measured for π⁺, π^- and π⁰ mesons. The dependence of this amplitude on the Bjorken scaling variable and on the pion fractional energy and transverse momentum is presented. The results are compared to theoretical model calculations.

Original language	English (US)
Pages (from-to)	164-170
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	648
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2007.03.015
State	Published - May 3 2007
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

Online availability

10.1016/j.physletb.2007.03.015

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Airapetian, A., Akopov, Z., Amarian, M., Andrus, A., Aschenauer, E. C., Augustyniak, W., Avakian, H., Avakian, R., Avetissian, A., Avetisyan, E., Bacchetta, A., Bailey, P., Belostotski, S., Bianchi, N., Blok, H. P., Böttcher, H., Borissov, A., Borysenko, A., Brüll, A., ... Zupranski, P. (2007). Beam-spin asymmetries in the azimuthal distribution of pion electroproduction. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 648(2-3), 164-170. https://doi.org/10.1016/j.physletb.2007.03.015

Airapetian, A, Akopov, Z, Amarian, M, Andrus, A, Aschenauer, EC, Augustyniak, W, Avakian, H, Avakian, R, Avetissian, A, Avetisyan, E, Bacchetta, A, Bailey, P, Belostotski, S, Bianchi, N, Blok, HP, Böttcher, H, Borissov, A, Borysenko, A, Brüll, A, Bryzgalov, V, Capiluppi, M, Capitani, GP, Ciullo, G, Contalbrigo, M, Dalpiaz, PF, Deconinck, W, De Leo, R, Demey, M, De Nardo, L, De Sanctis, E, Devitsin, E, Diefenthaler, M, Di Nezza, P, Dreschler, J, Düren, M, Ehrenfried, M, Elalaoui-Moulay, A, Elbakian, G, Ellinghaus, F, Elschenbroich, U, Fabbri, R, Fantoni, A, Felawka, L, Frullani, S, Funel, A, Gapienko, G, Gapienko, V, Garibaldi, F, Garrow, K, Gavrilov, G, Gharibyan, V, Giordano, F, Grebeniouk, O, Gregor, IM, Guler, H, Hadjidakis, C, Hafidi, K, Hartig, M, Hasch, D, Hasegawa, T, Hesselink, WHA, Hillenbrand, A, Hoek, M, Holler, Y, Hommez, B, Hristova, I, Iarygin, G, Ivanilov, A, Izotov, A, Jackson, HE, Jgoun, A, Kaiser, R, Keri, T, Kinney, E, Kisselev, A, Kobayashi, T, Kopytin, M, Korotkov, V, Kozlov, V, Krauss, B, Kravchenko, P, Krivokhijine, VG, Lagamba, L, Lapikás, L, Lenisa, P, Liebing, P, Linden-Levy, LA, Lorenzon, W, Lu, J, Lu, S, Ma, BQ, Maiheu, B, Makins, NCR, Mao, Y, Marianski, B, Marukyan, H, Masoli, F, Mexner, V, Meyners, N, Michler, T, Mikloukho, O, Miller, CA, Miyachi, Y, Muccifora, V, Murray, M, Nagaitsev, A, Nappi, E, Naryshkin, Y, Negodaev, M, Nowak, WD, Oganessyan, K, Ohsuga, H, Osborne, A, Perez-Benito, R, Pickert, N, Raithel, M, Reggiani, D, Reimer, PE, Reischl, A, Reolon, AR, Riedl, C, Rith, K, Rosner, G, Rostomyan, A, Rubacek, L, Rubin, J, Ryckbosch, D, Salomatin, Y, Sanjiev, I, Savin, I, Schäfer, A, Schnell, G, Schüler, KP, Seele, J, Seidl, R, Seitz, B, Shearer, C, Shibata, TA, Shutov, V, Sinram, K, Stancari, M, Statera, M, Steffens, E, Steijger, JJM, Stenzel, H, Stewart, J, Stinzing, F, Streit, J, Tait, P, Tanaka, H, Taroian, S, Tchuiko, B, Terkulov, A, Trzcinski, A, Tytgat, M, Vandenbroucke, A, van der Nat, PB, van der Steenhoven, G, van Haarlem, Y, Vikhrov, V, Vogel, C, Wang, S, Ye, Y, Ye, Z, Yen, S, Zihlmann, B & Zupranski, P 2007, 'Beam-spin asymmetries in the azimuthal distribution of pion electroproduction', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 648, no. 2-3, pp. 164-170. https://doi.org/10.1016/j.physletb.2007.03.015

@article{0bf71e7e339e4caf9eabce496293cacd,

title = "Beam-spin asymmetries in the azimuthal distribution of pion electroproduction",

abstract = "A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was performed using the HERMES spectrometer with a hydrogen gas target and the longitudinally polarized 27.6 GeV positron beam of HERA. The sinusoidal amplitude of the dependence of the asymmetry on the angle φ{symbol} of the hadron production plane around the virtual photon direction relative to the lepton scattering plane was measured for π+, π- and π0 mesons. The dependence of this amplitude on the Bjorken scaling variable and on the pion fractional energy and transverse momentum is presented. The results are compared to theoretical model calculations.",

author = "A. Airapetian and Z. Akopov and M. Amarian and A. Andrus and Aschenauer, {E. C.} and W. Augustyniak and H. Avakian and R. Avakian and A. Avetissian and E. Avetisyan and A. Bacchetta and P. Bailey and S. Belostotski and N. Bianchi and Blok, {H. P.} and H. B{\"o}ttcher and A. Borissov and A. Borysenko and A. Br{\"u}ll and V. Bryzgalov and M. Capiluppi and Capitani, {G. P.} and G. Ciullo and M. Contalbrigo and Dalpiaz, {P. F.} and W. Deconinck and {De Leo}, R. and M. Demey and {De Nardo}, L. and {De Sanctis}, E. and E. Devitsin and M. Diefenthaler and {Di Nezza}, P. and J. Dreschler and M. D{\"u}ren and M. Ehrenfried and A. Elalaoui-Moulay and G. Elbakian and F. Ellinghaus and U. Elschenbroich and R. Fabbri and A. Fantoni and L. Felawka and S. Frullani and A. Funel and G. Gapienko and V. Gapienko and F. Garibaldi and K. Garrow and G. Gavrilov and V. Gharibyan and F. Giordano and O. Grebeniouk and Gregor, {I. M.} and H. Guler and C. Hadjidakis and K. Hafidi and M. Hartig and D. Hasch and T. Hasegawa and Hesselink, {W. H.A.} and A. Hillenbrand and M. Hoek and Y. Holler and B. Hommez and I. Hristova and G. Iarygin and A. Ivanilov and A. Izotov and Jackson, {H. E.} and A. Jgoun and R. Kaiser and T. Keri and E. Kinney and A. Kisselev and T. Kobayashi and M. Kopytin and V. Korotkov and V. Kozlov and B. Krauss and P. Kravchenko and Krivokhijine, {V. G.} and L. Lagamba and L. Lapik{\'a}s and P. Lenisa and P. Liebing and Linden-Levy, {L. A.} and W. Lorenzon and J. Lu and S. Lu and Ma, {B. Q.} and B. Maiheu and Makins, {N. C.R.} and Y. Mao and B. Marianski and H. Marukyan and F. Masoli and V. Mexner and N. Meyners and T. Michler and O. Mikloukho and Miller, {C. A.} and Y. Miyachi and V. Muccifora and M. Murray and A. Nagaitsev and E. Nappi and Y. Naryshkin and M. Negodaev and Nowak, {W. D.} and K. Oganessyan and H. Ohsuga and A. Osborne and R. Perez-Benito and N. Pickert and M. Raithel and D. Reggiani and Reimer, {P. E.} and A. Reischl and Reolon, {A. R.} and C. Riedl and K. Rith and G. Rosner and A. Rostomyan and L. Rubacek and J. Rubin and D. Ryckbosch and Y. Salomatin and I. Sanjiev and I. Savin and A. Sch{\"a}fer and G. Schnell and Sch{\"u}ler, {K. P.} and J. Seele and R. Seidl and B. Seitz and C. Shearer and Shibata, {T. A.} and V. Shutov and K. Sinram and M. Stancari and M. Statera and E. Steffens and Steijger, {J. J.M.} and H. Stenzel and J. Stewart and F. Stinzing and J. Streit and P. Tait and H. Tanaka and S. Taroian and B. Tchuiko and A. Terkulov and A. Trzcinski and M. Tytgat and A. Vandenbroucke and {van der Nat}, {P. B.} and {van der Steenhoven}, G. and {van Haarlem}, Y. and V. Vikhrov and C. Vogel and S. Wang and Y. Ye and Z. Ye and S. Yen and B. Zihlmann and P. Zupranski",

note = "Funding Information: We gratefully acknowledge the DESY management for its support and the staff at DESY and the collaborating institutions for their significant effort. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the National Natural Science Foundation of China; the Alexander von Humboldt Stiftung; the German Bundesministerium f{\"u}r Bildung und Forschung (BMBF); the Deutsche Forschungsgemeinschaft (DFG); the Italian Istituto Nazionale di Fisica Nucleare (INFN); the MEXT, JSPS, and COE21 of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the UK Engineering and Physical Sciences Research Council, the Particle Physics and Astronomy Research Council and the Scottish Universities Physics Alliance; the US Department of Energy (DOE) and the National Science Foundation (NSF); the Russian Academy of Science and the Russian Federal Agency for Science and Innovations; the Ministry of Trade and Economical Development and the Ministry of Education and Science of Armenia; and the European Community-Research Infrastructure Activity under the FP6 “Structuring the European Research Area” program (HadronPhysics, contract number RII3-CT-2004-506078).",

year = "2007",

month = may,

day = "3",

doi = "10.1016/j.physletb.2007.03.015",

language = "English (US)",

volume = "648",

pages = "164--170",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "2-3",

}

TY - JOUR

T1 - Beam-spin asymmetries in the azimuthal distribution of pion electroproduction

AU - Airapetian, A.

AU - Akopov, Z.

AU - Amarian, M.

AU - Andrus, A.

AU - Aschenauer, E. C.

AU - Augustyniak, W.

AU - Avakian, H.

AU - Avakian, R.

AU - Avetissian, A.

AU - Avetisyan, E.

AU - Bacchetta, A.

AU - Bailey, P.

AU - Belostotski, S.

AU - Bianchi, N.

AU - Blok, H. P.

AU - Böttcher, H.

AU - Borissov, A.

AU - Borysenko, A.

AU - Brüll, A.

AU - Bryzgalov, V.

AU - Capiluppi, M.

AU - Capitani, G. P.

AU - Ciullo, G.

AU - Contalbrigo, M.

AU - Dalpiaz, P. F.

AU - Deconinck, W.

AU - De Leo, R.

AU - Demey, M.

AU - De Nardo, L.

AU - De Sanctis, E.

AU - Devitsin, E.

AU - Diefenthaler, M.

AU - Di Nezza, P.

AU - Dreschler, J.

AU - Düren, M.

AU - Ehrenfried, M.

AU - Elalaoui-Moulay, A.

AU - Elbakian, G.

AU - Ellinghaus, F.

AU - Elschenbroich, U.

AU - Fabbri, R.

AU - Fantoni, A.

AU - Felawka, L.

AU - Frullani, S.

AU - Funel, A.

AU - Gapienko, G.

AU - Gapienko, V.

AU - Garibaldi, F.

AU - Garrow, K.

AU - Gavrilov, G.

AU - Gharibyan, V.

AU - Giordano, F.

AU - Grebeniouk, O.

AU - Gregor, I. M.

AU - Guler, H.

AU - Hadjidakis, C.

AU - Hafidi, K.

AU - Hartig, M.

AU - Hasch, D.

AU - Hasegawa, T.

AU - Hesselink, W. H.A.

AU - Hillenbrand, A.

AU - Hoek, M.

AU - Holler, Y.

AU - Hommez, B.

AU - Hristova, I.

AU - Iarygin, G.

AU - Ivanilov, A.

AU - Izotov, A.

AU - Jackson, H. E.

AU - Jgoun, A.

AU - Kaiser, R.

AU - Keri, T.

AU - Kinney, E.

AU - Kisselev, A.

AU - Kobayashi, T.

AU - Kopytin, M.

AU - Korotkov, V.

AU - Kozlov, V.

AU - Krauss, B.

AU - Kravchenko, P.

AU - Krivokhijine, V. G.

AU - Lagamba, L.

AU - Lapikás, L.

AU - Lenisa, P.

AU - Liebing, P.

AU - Linden-Levy, L. A.

AU - Lorenzon, W.

AU - Lu, J.

AU - Lu, S.

AU - Ma, B. Q.

AU - Maiheu, B.

AU - Makins, N. C.R.

AU - Mao, Y.

AU - Marianski, B.

AU - Marukyan, H.

AU - Masoli, F.

AU - Mexner, V.

AU - Meyners, N.

AU - Michler, T.

AU - Mikloukho, O.

AU - Miller, C. A.

AU - Miyachi, Y.

AU - Muccifora, V.

AU - Murray, M.

AU - Nagaitsev, A.

AU - Nappi, E.

AU - Naryshkin, Y.

AU - Negodaev, M.

AU - Nowak, W. D.

AU - Oganessyan, K.

AU - Ohsuga, H.

AU - Osborne, A.

AU - Perez-Benito, R.

AU - Pickert, N.

AU - Raithel, M.

AU - Reggiani, D.

AU - Reimer, P. E.

AU - Reischl, A.

AU - Reolon, A. R.

AU - Riedl, C.

AU - Rith, K.

AU - Rosner, G.

AU - Rostomyan, A.

AU - Rubacek, L.

AU - Rubin, J.

AU - Ryckbosch, D.

AU - Salomatin, Y.

AU - Sanjiev, I.

AU - Savin, I.

AU - Schäfer, A.

AU - Schnell, G.

AU - Schüler, K. P.

AU - Seele, J.

AU - Seidl, R.

AU - Seitz, B.

AU - Shearer, C.

AU - Shibata, T. A.

AU - Shutov, V.

AU - Sinram, K.

AU - Stancari, M.

AU - Statera, M.

AU - Steffens, E.

AU - Steijger, J. J.M.

AU - Stenzel, H.

AU - Stewart, J.

AU - Stinzing, F.

AU - Streit, J.

AU - Tait, P.

AU - Tanaka, H.

AU - Taroian, S.

AU - Tchuiko, B.

AU - Terkulov, A.

AU - Trzcinski, A.

AU - Tytgat, M.

AU - Vandenbroucke, A.

AU - van der Nat, P. B.

AU - van der Steenhoven, G.

AU - van Haarlem, Y.

AU - Vikhrov, V.

AU - Vogel, C.

AU - Wang, S.

AU - Ye, Y.

AU - Ye, Z.

AU - Yen, S.

AU - Zihlmann, B.

AU - Zupranski, P.

N1 - Funding Information: We gratefully acknowledge the DESY management for its support and the staff at DESY and the collaborating institutions for their significant effort. This work was supported by the FWO-Flanders, Belgium; the Natural Sciences and Engineering Research Council of Canada; the National Natural Science Foundation of China; the Alexander von Humboldt Stiftung; the German Bundesministerium für Bildung und Forschung (BMBF); the Deutsche Forschungsgemeinschaft (DFG); the Italian Istituto Nazionale di Fisica Nucleare (INFN); the MEXT, JSPS, and COE21 of Japan; the Dutch Foundation for Fundamenteel Onderzoek der Materie (FOM); the UK Engineering and Physical Sciences Research Council, the Particle Physics and Astronomy Research Council and the Scottish Universities Physics Alliance; the US Department of Energy (DOE) and the National Science Foundation (NSF); the Russian Academy of Science and the Russian Federal Agency for Science and Innovations; the Ministry of Trade and Economical Development and the Ministry of Education and Science of Armenia; and the European Community-Research Infrastructure Activity under the FP6 “Structuring the European Research Area” program (HadronPhysics, contract number RII3-CT-2004-506078).

PY - 2007/5/3

Y1 - 2007/5/3

N2 - A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was performed using the HERMES spectrometer with a hydrogen gas target and the longitudinally polarized 27.6 GeV positron beam of HERA. The sinusoidal amplitude of the dependence of the asymmetry on the angle φ{symbol} of the hadron production plane around the virtual photon direction relative to the lepton scattering plane was measured for π+, π- and π0 mesons. The dependence of this amplitude on the Bjorken scaling variable and on the pion fractional energy and transverse momentum is presented. The results are compared to theoretical model calculations.

AB - A measurement of the beam-spin asymmetry in the azimuthal distribution of pions produced in semi-inclusive deep-inelastic scattering off protons is presented. The measurement was performed using the HERMES spectrometer with a hydrogen gas target and the longitudinally polarized 27.6 GeV positron beam of HERA. The sinusoidal amplitude of the dependence of the asymmetry on the angle φ{symbol} of the hadron production plane around the virtual photon direction relative to the lepton scattering plane was measured for π+, π- and π0 mesons. The dependence of this amplitude on the Bjorken scaling variable and on the pion fractional energy and transverse momentum is presented. The results are compared to theoretical model calculations.

UR - http://www.scopus.com/inward/record.url?scp=34147224190&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34147224190&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2007.03.015

DO - 10.1016/j.physletb.2007.03.015

M3 - Article

AN - SCOPUS:34147224190

SN - 0370-2693

VL - 648

SP - 164

EP - 170

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3

ER -

Beam-spin asymmetries in the azimuthal distribution of pion electroproduction

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