Single-spin azimuthal asymmetry in exclusive electroproduction of π + mesons

A. Airapetian; N. Akopov; Z. Akopov; M. Amarian; E. C. Aschenauer; H. Avakian; R. Avakian; A. Avetissian; E. Avetissian; P. Bailey; V. Baturin; C. Baumgarten; M. Beckmann; S. Belostotski; S. Bernreuther; N. Bianchi; H. Böttcher; A. Borissov; O. Bouhali; M. Bouwhuis; J. Brack; S. Brauksiepe; A. Brüll; I. Brunn; H. J. Bulten; G. P. Capitani; P. Chumney; E. Cisbani; G. Ciullo; G. R. Court; P. F. Dalpiaz; R. De Leo; L. De Nardo; E. De Sanctis; D. De Schepper; E. Devitsin; P. K.A. de Witt Huberts; P. Di Nezza; M. Düren; M. Ehrenfried; G. Elbakian; F. Ellinghaus; J. Ely; R. Fabbri; A. Fantoni; A. Fechtchenko; L. Felawka; B. W. Filippone; H. Fischer; B. Fox; J. Franz; S. Frullani; Y. Gärber; F. Garibaldi; E. Garutti; G. Gavrilov; V. Gharibyan; G. Graw; O. Grebeniouk; P. W. Green; L. G. Greeniaus; A. Gute; W. Haeberli; K. Hafidi; M. Hartig; D. Hasch; D. Heesbeen; F. H. Heinsius; M. Henoch; R. Hertenberger; W. H.A. Hesselink; G. Hofman; Y. Holler; R. J. Holt; B. Hommez; G. Iarygin; A. Izotov; H. E. Jackson; A. Jgoun; P. Jung; R. Kaiser; A. Kisselev; P. Kitching; K. Königsmann; H. Kolster; V. Korotkov; E. Kotik; V. Kozlov; B. Krauss; V. G. Krivokhijine; G. Kyle; L. Lagamba; A. Laziev; P. Lenisa; P. Liebing; T. Lindemann; W. Lorenzon; A. Maas; N. C.R. Makins; H. Marukyan; F. Masoli; K. McIlhany; F. Meissner; F. Menden; V. Mexner; N. Meyners; O. Mikloukho; R. Milner; V. Muccifora; A. Nagaitsev; E. Nappi; Y. Naryshkin; A. Nass; K. Negodaeva; W. D. Nowak; K. Oganessyan; T. G. O'Neill; B. R. Owen; S. F. Pate; S. Podiatchev; S. Potashov; D. H. Potterveld; M. Raithel; G. Rakness; V. Rappoport; R. Redwine; D. Reggiani; P. Reimer; A. R. Reolon; K. Rith; D. Robinson; A. Rostomyan; D. Ryckbosch; Y. Sakemi; I. Sanjiev; F. Sato; I. Savin; C. Scarlett; A. Schäfer; C. Schill; F. Schmidt; G. Schnell; K. P. Schüler; A. Schwind; J. Seibert; B. Seitz; T. A. Shibata; V. Shutov; M. C. Simani; A. Simon; K. Sinram; E. Steffens; J. J.M. Steijger; J. Stewart; U. Stösslein; K. Suetsugu; S. Taroian; A. Terkulov; S. Tessarin; E. Thomas; B. Tipton; M. Tytgat; G. M. Urciuoli; J. F.J. van den Brand; G. van der Steenhoven; R. van de Vyver; M. C. Vetterli; V. Vikhrov; M. G. Vincter; J. Visser; J. Volmer; C. Weiskopf; J. Wendland; J. Wilbert; T. Wise; S. Yen; S. Yoneyama; H. Zohrabian

doi:10.1016/S0370-2693(02)01780-X

Single-spin azimuthal asymmetry in exclusive electroproduction of π ⁺ mesons

A. Airapetian
, N. Akopov
, Z. Akopov
, M. Amarian
, E. C. Aschenauer
, H. Avakian
, R. Avakian
, A. Avetissian
, E. Avetissian
, P. Bailey
, V. Baturin
, C. Baumgarten
, M. Beckmann
, S. Belostotski
, S. Bernreuther
, N. Bianchi
, H. Böttcher
, A. Borissov
, O. Bouhali
, M. Bouwhuis

J. Brack, S. Brauksiepe, A. Brüll, I. Brunn, H. J. Bulten, G. P. Capitani, P. Chumney, E. Cisbani, G. Ciullo, G. R. Court, P. F. Dalpiaz, R. De Leo, L. De Nardo, E. De Sanctis, D. De Schepper, E. Devitsin, P. K.A. de Witt Huberts, P. Di Nezza, M. Düren, M. Ehrenfried, G. Elbakian, F. Ellinghaus, J. Ely, R. Fabbri, A. Fantoni, A. Fechtchenko, L. Felawka, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frullani, Y. Gärber, F. Garibaldi, E. Garutti, G. Gavrilov, V. Gharibyan, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, A. Gute, W. Haeberli, K. Hafidi, M. Hartig, D. Hasch, D. Heesbeen, F. H. Heinsius, M. Henoch, R. Hertenberger, W. H.A. Hesselink, G. Hofman, Y. Holler, R. J. Holt, B. Hommez, G. Iarygin, A. Izotov, H. E. Jackson, A. Jgoun, P. Jung, R. Kaiser, A. Kisselev, P. Kitching, K. Königsmann, H. Kolster, V. Korotkov, E. Kotik, V. Kozlov, B. Krauss, V. G. Krivokhijine, G. Kyle, L. Lagamba, A. Laziev, P. Lenisa, P. Liebing, T. Lindemann, W. Lorenzon, A. Maas, N. C.R. Makins, H. Marukyan, F. Masoli, K. McIlhany, F. Meissner, F. Menden, V. Mexner, N. Meyners, O. Mikloukho, R. Milner, V. Muccifora, A. Nagaitsev, E. Nappi, Y. Naryshkin, A. Nass, K. Negodaeva, W. D. Nowak, K. Oganessyan, T. G. O'Neill, B. R. Owen, S. F. Pate, S. Podiatchev, S. Potashov, D. H. Potterveld, M. Raithel, G. Rakness, V. Rappoport, R. Redwine, D. Reggiani, P. Reimer, A. R. Reolon, K. Rith, D. Robinson, A. Rostomyan, D. Ryckbosch, Y. Sakemi, I. Sanjiev, F. Sato, I. Savin, C. Scarlett, A. Schäfer, C. Schill, F. Schmidt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, B. Seitz, T. A. Shibata, V. Shutov, M. C. Simani, A. Simon, K. Sinram, E. Steffens, J. J.M. Steijger, J. Stewart, U. Stösslein, K. Suetsugu, S. Taroian, A. Terkulov, S. Tessarin, E. Thomas^*, B. Tipton, M. Tytgat, G. M. Urciuoli, J. F.J. van den Brand, G. van der Steenhoven, R. van de Vyver, M. C. Vetterli, V. Vikhrov, M. G. Vincter, J. Visser, J. Volmer, C. Weiskopf, J. Wendland, J. Wilbert, T. Wise, S. Yen, S. Yoneyama, H. Zohrabian

^*Corresponding author for this work

A. Alikhanian Yerevan Institute of Physics
Istituto Superiore di Sanita
German Electron Synchrotron
National Institute for Nuclear Physics
University of Illinois
RAS - Saint Petersburg Nuclear Physics Institute
Ludwig Maximilian University of Munich
University of Freiburg
Institute of Science Tokyo
University of Michigan, Ann Arbor
National Institute for Subatomic Physics
University of Colorado Boulder
Massachusetts Institute of Technology
Friedrich-Alexander University Erlangen-Nürnberg
Vrije Universiteit Amsterdam
New Mexico State University
Istituto Nazionale di Fisica Nucleare, Roma
University of Liverpool
University of Alberta
Argonne National Laboratory
RAS - P.N. Lebedev Physics Institute
Justus Liebig University Giessen
Joint Institute for Nuclear Research
TRIUMF
California Institute of Technology
University of Wisconsin-Madison
Ghent University
University of Regensburg
Simon Fraser University

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

39 Citations (Scopus)

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	https://doi.org/10.1016/S0370-2693(02)01780-X
Publication status	Published - 23 May 2002
Externally published	Yes

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10.1016/S0370-2693(02)01780-X

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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., ... Zohrabian, H. (2002). Single-spin azimuthal asymmetry in exclusive electroproduction of π ⁺ mesons. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 535(1-4), 85-92. https://doi.org/10.1016/S0370-2693(02)01780-X

@article{251a0d41f0e94ce18b97de987ea93585,

title = "Single-spin azimuthal asymmetry in exclusive electroproduction of π + mesons",

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).",

author = "A. Airapetian and N. Akopov and Z. Akopov and M. Amarian and Aschenauer, \{E. C.\} and H. Avakian and R. Avakian and A. Avetissian and E. Avetissian and P. Bailey and V. Baturin and C. Baumgarten and M. Beckmann and S. Belostotski and S. Bernreuther and N. Bianchi and H. B{\"o}ttcher and A. Borissov and O. Bouhali and M. Bouwhuis and J. Brack and S. Brauksiepe and A. Br{\"u}ll and I. Brunn and Bulten, \{H. J.\} and Capitani, \{G. P.\} and P. Chumney and E. Cisbani and G. Ciullo and Court, \{G. R.\} and Dalpiaz, \{P. F.\} and \{De Leo\}, R. and \{De Nardo\}, L. and \{De Sanctis\}, E. and \{De Schepper\}, D. and E. Devitsin and \{de Witt Huberts\}, \{P. K.A.\} and \{Di Nezza\}, P. and M. D{\"u}ren and M. Ehrenfried and G. Elbakian and F. Ellinghaus and J. Ely and R. Fabbri and A. Fantoni and A. Fechtchenko and L. Felawka and Filippone, \{B. W.\} and H. Fischer and B. Fox and J. Franz and S. Frullani and Y. G{\"a}rber and F. Garibaldi and E. Garutti and G. Gavrilov and V. Gharibyan and G. Graw and O. Grebeniouk and Green, \{P. W.\} and Greeniaus, \{L. G.\} and A. Gute and W. Haeberli and K. Hafidi and M. Hartig and D. Hasch and D. Heesbeen and Heinsius, \{F. H.\} and M. Henoch and R. Hertenberger and Hesselink, \{W. H.A.\} and G. Hofman and Y. Holler and Holt, \{R. J.\} and B. Hommez and G. Iarygin and A. Izotov and Jackson, \{H. E.\} and A. Jgoun and P. Jung and R. Kaiser and A. Kisselev and P. Kitching and K. K{\"o}nigsmann and H. Kolster and V. Korotkov and E. Kotik and V. Kozlov and B. Krauss and Krivokhijine, \{V. G.\} and G. Kyle and L. Lagamba and A. Laziev and P. Lenisa and P. Liebing and T. Lindemann and W. Lorenzon and A. Maas and Makins, \{N. C.R.\} and H. Marukyan and F. Masoli and K. McIlhany and F. Meissner and F. Menden and V. Mexner and N. Meyners and O. Mikloukho and R. Milner and V. Muccifora and A. Nagaitsev and E. Nappi and Y. Naryshkin and A. Nass and K. Negodaeva and Nowak, \{W. D.\} and K. Oganessyan and O'Neill, \{T. G.\} and Owen, \{B. R.\} and Pate, \{S. F.\} and S. Podiatchev and S. Potashov and Potterveld, \{D. H.\} and M. Raithel and G. Rakness and V. Rappoport and R. Redwine and D. Reggiani and P. Reimer and Reolon, \{A. R.\} and K. Rith and D. Robinson and A. Rostomyan and D. Ryckbosch and Y. Sakemi and I. Sanjiev and F. Sato and I. Savin and C. Scarlett and A. Sch{\"a}fer and C. Schill and F. Schmidt and G. Schnell and Sch{\"u}ler, \{K. P.\} and A. Schwind and J. Seibert and B. Seitz and Shibata, \{T. A.\} and V. Shutov and Simani, \{M. C.\} and A. Simon and K. Sinram and E. Steffens and Steijger, \{J. J.M.\} and J. Stewart and U. St{\"o}sslein and K. Suetsugu and S. Taroian and A. Terkulov and S. Tessarin and E. Thomas and B. Tipton and M. Tytgat and Urciuoli, \{G. M.\} and \{van den Brand\}, \{J. F.J.\} and \{van der Steenhoven\}, G. and \{van de Vyver\}, R. and Vetterli, \{M. C.\} and V. Vikhrov and Vincter, \{M. G.\} and J. Visser and J. Volmer and C. Weiskopf and J. Wendland and J. Wilbert and T. Wise and S. Yen and S. Yoneyama and H. Zohrabian",

year = "2002",

month = may,

day = "23",

doi = "10.1016/S0370-2693(02)01780-X",

language = "English",

volume = "535",

pages = "85--92",

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

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-4",

}

Airapetian, A, Akopov, N, Akopov, Z, Amarian, M, Aschenauer, EC, 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, HJ, Capitani, GP, Chumney, P, Cisbani, E, Ciullo, G, Court, GR, Dalpiaz, PF, De Leo, R, De Nardo, L, De Sanctis, E, De Schepper, D, Devitsin, E, de Witt Huberts, PKA, Di Nezza, P, Düren, M, Ehrenfried, M, Elbakian, G, Ellinghaus, F, Ely, J, Fabbri, R, Fantoni, A, Fechtchenko, A, Felawka, L, Filippone, BW, Fischer, H, Fox, B, Franz, J, Frullani, S, Gärber, Y, Garibaldi, F, Garutti, E, Gavrilov, G, Gharibyan, V, Graw, G, Grebeniouk, O, Green, PW, Greeniaus, LG, Gute, A, Haeberli, W, Hafidi, K, Hartig, M, Hasch, D, Heesbeen, D, Heinsius, FH, Henoch, M, Hertenberger, R, Hesselink, WHA, Hofman, G, Holler, Y, Holt, RJ, Hommez, B, Iarygin, G, Izotov, A, Jackson, HE, Jgoun, A, Jung, P, Kaiser, R, Kisselev, A, Kitching, P, Königsmann, K, Kolster, H, Korotkov, V, Kotik, E, Kozlov, V, Krauss, B, Krivokhijine, VG, Kyle, G, Lagamba, L, Laziev, A, Lenisa, P, Liebing, P, Lindemann, T, Lorenzon, W, Maas, A, Makins, NCR, 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, WD, Oganessyan, K, O'Neill, TG, Owen, BR, Pate, SF, Podiatchev, S, Potashov, S, Potterveld, DH, Raithel, M, Rakness, G, Rappoport, V, Redwine, R, Reggiani, D, Reimer, P, Reolon, AR, 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, KP, Schwind, A, Seibert, J, Seitz, B, Shibata, TA, Shutov, V, Simani, MC, Simon, A, Sinram, K, Steffens, E, Steijger, JJM, Stewart, J, Stösslein, U, Suetsugu, K, Taroian, S, Terkulov, A, Tessarin, S, Thomas, E, Tipton, B, Tytgat, M, Urciuoli, GM, van den Brand, JFJ, van der Steenhoven, G, van de Vyver, R, Vetterli, MC, Vikhrov, V, Vincter, MG, Visser, J, Volmer, J, Weiskopf, C, Wendland, J, Wilbert, J, Wise, T, Yen, S, Yoneyama, S & Zohrabian, H 2002, 'Single-spin azimuthal asymmetry in exclusive electroproduction of π ⁺ mesons', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 535, no. 1-4, pp. 85-92. https://doi.org/10.1016/S0370-2693(02)01780-X

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.

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 - https://www.scopus.com/pages/publications/0037161931

U2 - 10.1016/S0370-2693(02)01780-X

DO - 10.1016/S0370-2693(02)01780-X

M3 - Article

AN - SCOPUS:0037161931

SN - 0370-2693

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

IS - 1-4

ER -

Single-spin azimuthal asymmetry in exclusive electroproduction of π ⁺ mesons

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