Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

A. Airapetian; N. Akopov; Z. Akopov; E. C. Aschenauer; W. Augustyniak; R. Avakian; A. Avetissian; E. Avetisyan; S. Belostotski; H. P. Blok; A. Borissov; J. Bowles; I. Brodski; V. Bryzgalov; J. Burns; M. Capiluppi; G. P. Capitani; E. Cisbani; G. Ciullo; M. Contalbrigo; P. F. Dalpiaz; W. Deconinck; R. De Leo; L. De Nardo; E. De Sanctis; M. Diefenthaler; P. Di Nezza; M. Düren; M. Ehrenfried; G. Elbakian; F. Ellinghaus; E. Etzelmüller; R. Fabbri; A. Fantoni; L. Felawka; S. Frullani; G. Gapienko; V. Gapienko; F. Garibaldi; G. Gavrilov; V. Gharibyan; F. Giordano; S. Gliske; M. Golembiovskaya; I. M. Gregor; H. Guler; M. Hartig; D. Hasch; A. Hillenbrand; M. Hoek; Y. Holler; I. Hristova; A. Ivanilov; H. E. Jackson; H. S. Jo; S. Joosten; R. Kaiser; G. Karyan; T. Keri; E. Kinney; A. Kisselev; V. Korotkov; V. Kozlov; B. Krauss; P. Kravchenko; V. G. Krivokhijine; L. Lagamba; L. Lapikás; I. Lehmann; P. Lenisa; A. López Ruiz; W. Lorenzon; S. Lu; X. Lu; B. Q. Ma; D. Mahon; N. C.R. Makins; S. I. Manaenkov; L. Manfré; Y. Mao; B. Marianski; A. Martinez De La Ossa; H. Marukyan; C. A. Miller; Y. Miyachi; A. Movsisyan; M. Murray; A. Mussgiller; E. Nappi; Y. Naryshkin; A. Nass; M. Negodaev; W. D. Nowak; A. Osborne; L. L. Pappalardo; R. Perez-Benito; A. Petrosyan; P. E. Reimer; A. R. Reolon; C. Riedl; K. Rith; G. Rosner; A. Rostomyan; L. Rubacek; J. Rubin; D. Ryckbosch; A. Schäfer; G. Schnell; K. P. Schüler; B. Seitz; C. Shearer; T. A. Shibata; V. Shutov; M. Stancari; M. Statera; J. J.M. Steijger; J. Stewart; S. Taroian; A. Terkulov; R. Truty; A. Trzcinski; M. Tytgat; Y. Van Haarlem; C. Van Hulse; D. Veretennikov; V. Vikhrov; I. Vilardi; S. Wang; S. Yaschenko; Z. Ye; S. Yen; V. Zagrebelnyy; D. Zeiler; B. Zihlmann; P. Zupranski

doi:10.1007/JHEP10(2012)042

Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

A. Airapetian
, N. Akopov
, Z. Akopov
, E. C. Aschenauer
, W. Augustyniak
, R. Avakian
, A. Avetissian
, E. Avetisyan
, S. Belostotski
, H. P. Blok
, A. Borissov
, J. Bowles
, I. Brodski
, V. Bryzgalov
, J. Burns
, M. Capiluppi
, G. P. Capitani
, E. Cisbani
, G. Ciullo
, M. Contalbrigo

P. F. Dalpiaz, W. Deconinck, R. De Leo, L. De Nardo, E. De Sanctis, M. Diefenthaler, P. Di Nezza, M. Düren, M. Ehrenfried, G. Elbakian, F. Ellinghaus, E. Etzelmüller, R. Fabbri, A. Fantoni, L. Felawka, S. Frullani, G. Gapienko, V. Gapienko, F. Garibaldi, G. Gavrilov, V. Gharibyan, F. Giordano, S. Gliske, M. Golembiovskaya, I. M. Gregor, H. Guler, M. Hartig, D. Hasch, A. Hillenbrand, M. Hoek, Y. Holler, I. Hristova, A. Ivanilov, H. E. Jackson, H. S. Jo, S. Joosten, R. Kaiser, G. Karyan, T. Keri, E. Kinney, A. Kisselev, V. Korotkov, V. Kozlov, B. Krauss, P. Kravchenko, V. G. Krivokhijine, L. Lagamba, L. Lapikás, I. Lehmann, P. Lenisa, A. López Ruiz, W. Lorenzon, S. Lu, X. Lu, B. Q. Ma, D. Mahon, N. C.R. Makins, S. I. Manaenkov, L. Manfré, Y. Mao, B. Marianski, A. Martinez De La Ossa, H. Marukyan, C. A. Miller, Y. Miyachi, A. Movsisyan, M. Murray, A. Mussgiller, E. Nappi, Y. Naryshkin, A. Nass, M. Negodaev, W. D. Nowak, A. Osborne, L. L. Pappalardo, R. Perez-Benito, A. Petrosyan, P. E. Reimer, A. R. Reolon, C. Riedl, K. Rith, G. Rosner, A. Rostomyan, L. Rubacek, J. Rubin, D. Ryckbosch, A. Schäfer, G. Schnell, K. P. Schüler, B. Seitz, C. Shearer, T. A. Shibata, V. Shutov, M. Stancari, M. Statera, J. J.M. Steijger, J. Stewart, S. Taroian, A. Terkulov, R. Truty, A. Trzcinski, M. Tytgat, Y. Van Haarlem, C. Van Hulse, D. Veretennikov, V. Vikhrov, I. Vilardi, S. Wang, S. Yaschenko, Z. Ye, S. Yen, V. Zagrebelnyy, D. Zeiler, B. Zihlmann, P. Zupranski

Justus Liebig University Giessen
University of Michigan, Ann Arbor
A. Alikhanian Yerevan Institute of Physics
German Electron Synchrotron
Brookhaven National Laboratory
National Centre for Nuclear Research
RAS - Saint Petersburg Nuclear Physics Institute
National Institute for Subatomic Physics
Vrije Universiteit Amsterdam
University of Glasgow
Institute for High Energy Physics
University of Ferrara
National Institute for Nuclear Physics
Istituto Superiore di Sanita
Ghent University
TRIUMF
Friedrich-Alexander University Erlangen-Nürnberg
University of Illinois at Urbana-Champaign
University of Colorado Boulder
Argonne National Laboratory
International Atomic Energy Agency
RAS - P.N. Lebedev Physics Institute
Joint Institute for Nuclear Research
Peking University
Tokyo Institute of Technology
Yamagata University
University of Regensburg
University of the Basque Country
Ikerbasque Basque Foundation for Science

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

45 Scopus citations

Abstract

The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized Hera positron beam scattering off an unpolarized hydrogen target is measured at Hermes. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of ep → epγ events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of background from ep → eNπγ events, which was estimated to contribute an average of about 12% to the signal in previous Hermes publications. The removal of this background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0:054 ± 0:016 to - 0:328 ± 0:027 (stat:) ± 0:045 (syst:).

Original language	English
Article number	042
Journal	Journal of High Energy Physics
Volume	2012
Issue number	10
DOIs	https://doi.org/10.1007/JHEP10(2012)042
State	Published - Oct 2012

Keywords

Lepton-Nucleon Scattering

Access to Document

10.1007/JHEP10(2012)042

Cite this

Airapetian, A., Akopov, N., Akopov, Z., Aschenauer, E. C., Augustyniak, W., Avakian, R., Avetissian, A., Avetisyan, E., Belostotski, S., Blok, H. P., Borissov, A., Bowles, J., Brodski, I., Bryzgalov, V., Burns, J., Capiluppi, M., Capitani, G. P., Cisbani, E., Ciullo, G., ... Zupranski, P. (2012). Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction. Journal of High Energy Physics, 2012(10), Article 042. https://doi.org/10.1007/JHEP10(2012)042

@article{9193a68217d642c7ad8640e977a2c2c2,

title = "Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction",

abstract = "The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized Hera positron beam scattering off an unpolarized hydrogen target is measured at Hermes. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of ep → epγ events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of background from ep → eNπγ events, which was estimated to contribute an average of about 12\% to the signal in previous Hermes publications. The removal of this background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0:054 ± 0:016 to - 0:328 ± 0:027 (stat:) ± 0:045 (syst:).",

keywords = "Lepton-Nucleon Scattering",

author = "A. Airapetian and N. Akopov and Z. Akopov and Aschenauer, \{E. C.\} and W. Augustyniak and R. Avakian and A. Avetissian and E. Avetisyan and S. Belostotski and Blok, \{H. P.\} and A. Borissov and J. Bowles and I. Brodski and V. Bryzgalov and J. Burns and M. Capiluppi and Capitani, \{G. P.\} and E. Cisbani and G. Ciullo and M. Contalbrigo and Dalpiaz, \{P. F.\} and W. Deconinck and \{De Leo\}, R. and \{De Nardo\}, L. and \{De Sanctis\}, E. and M. Diefenthaler and \{Di Nezza\}, P. and M. D{\"u}ren and M. Ehrenfried and G. Elbakian and F. Ellinghaus and E. Etzelm{\"u}ller and R. Fabbri and A. Fantoni and L. Felawka and S. Frullani and G. Gapienko and V. Gapienko and F. Garibaldi and G. Gavrilov and V. Gharibyan and F. Giordano and S. Gliske and M. Golembiovskaya and Gregor, \{I. M.\} and H. Guler and M. Hartig and D. Hasch and A. Hillenbrand and M. Hoek and Y. Holler and I. Hristova and A. Ivanilov and Jackson, \{H. E.\} and Jo, \{H. S.\} and S. Joosten and R. Kaiser and G. Karyan and T. Keri and E. Kinney and A. Kisselev 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 I. Lehmann and P. Lenisa and \{L{\'o}pez Ruiz\}, A. and W. Lorenzon and S. Lu and X. Lu and Ma, \{B. Q.\} and D. Mahon and Makins, \{N. C.R.\} and Manaenkov, \{S. I.\} and L. Manfr{\'e} and Y. Mao and B. Marianski and \{Martinez De La Ossa\}, A. and H. Marukyan and Miller, \{C. A.\} and Y. Miyachi and A. Movsisyan and M. Murray and A. Mussgiller and E. Nappi and Y. Naryshkin and A. Nass and M. Negodaev and Nowak, \{W. D.\} and A. Osborne and Pappalardo, \{L. L.\} and R. Perez-Benito and A. Petrosyan and Reimer, \{P. E.\} 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 A. Sch{\"a}fer and G. Schnell and Sch{\"u}ler, \{K. P.\} and B. Seitz and C. Shearer and Shibata, \{T. A.\} and V. Shutov and M. Stancari and M. Statera and Steijger, \{J. J.M.\} and J. Stewart and S. Taroian and A. Terkulov and R. Truty and A. Trzcinski and M. Tytgat and \{Van Haarlem\}, Y. and \{Van Hulse\}, C. and D. Veretennikov and V. Vikhrov and I. Vilardi and S. Wang and S. Yaschenko and Z. Ye and S. Yen and V. Zagrebelnyy and D. Zeiler and B. Zihlmann and P. Zupranski",

year = "2012",

month = oct,

doi = "10.1007/JHEP10(2012)042",

language = "English",

volume = "2012",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "10",

}

Airapetian, A, Akopov, N, Akopov, Z, Aschenauer, EC, Augustyniak, W, Avakian, R, Avetissian, A, Avetisyan, E, Belostotski, S, Blok, HP, Borissov, A, Bowles, J, Brodski, I, Bryzgalov, V, Burns, J, Capiluppi, M, Capitani, GP, Cisbani, E, Ciullo, G, Contalbrigo, M, Dalpiaz, PF, Deconinck, W, De Leo, R, De Nardo, L, De Sanctis, E, Diefenthaler, M, Di Nezza, P, Düren, M, Ehrenfried, M, Elbakian, G, Ellinghaus, F, Etzelmüller, E, Fabbri, R, Fantoni, A, Felawka, L, Frullani, S, Gapienko, G, Gapienko, V, Garibaldi, F, Gavrilov, G, Gharibyan, V, Giordano, F, Gliske, S, Golembiovskaya, M, Gregor, IM, Guler, H, Hartig, M, Hasch, D, Hillenbrand, A, Hoek, M, Holler, Y, Hristova, I, Ivanilov, A, Jackson, HE, Jo, HS, Joosten, S, Kaiser, R, Karyan, G, Keri, T, Kinney, E, Kisselev, A, Korotkov, V, Kozlov, V, Krauss, B, Kravchenko, P, Krivokhijine, VG, Lagamba, L, Lapikás, L, Lehmann, I, Lenisa, P, López Ruiz, A, Lorenzon, W, Lu, S, Lu, X, Ma, BQ, Mahon, D, Makins, NCR, Manaenkov, SI, Manfré, L, Mao, Y, Marianski, B, Martinez De La Ossa, A, Marukyan, H, Miller, CA, Miyachi, Y, Movsisyan, A, Murray, M, Mussgiller, A, Nappi, E, Naryshkin, Y, Nass, A, Negodaev, M, Nowak, WD, Osborne, A, Pappalardo, LL, Perez-Benito, R, Petrosyan, A, Reimer, PE, Reolon, AR, Riedl, C, Rith, K, Rosner, G, Rostomyan, A, Rubacek, L, Rubin, J, Ryckbosch, D, Schäfer, A, Schnell, G, Schüler, KP, Seitz, B, Shearer, C, Shibata, TA, Shutov, V, Stancari, M, Statera, M, Steijger, JJM, Stewart, J, Taroian, S, Terkulov, A, Truty, R, Trzcinski, A, Tytgat, M, Van Haarlem, Y, Van Hulse, C, Veretennikov, D, Vikhrov, V, Vilardi, I, Wang, S, Yaschenko, S, Ye, Z, Yen, S, Zagrebelnyy, V, Zeiler, D, Zihlmann, B & Zupranski, P 2012, 'Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction', Journal of High Energy Physics, vol. 2012, no. 10, 042. https://doi.org/10.1007/JHEP10(2012)042

TY - JOUR

T1 - Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

AU - Airapetian, A.

AU - Akopov, N.

AU - Akopov, Z.

AU - Aschenauer, E. C.

AU - Augustyniak, W.

AU - Avakian, R.

AU - Avetissian, A.

AU - Avetisyan, E.

AU - Belostotski, S.

AU - Blok, H. P.

AU - Borissov, A.

AU - Bowles, J.

AU - Brodski, I.

AU - Bryzgalov, V.

AU - Burns, J.

AU - Capiluppi, M.

AU - Capitani, G. P.

AU - Cisbani, E.

AU - Ciullo, G.

AU - Contalbrigo, M.

AU - Dalpiaz, P. F.

AU - Deconinck, W.

AU - De Leo, R.

AU - De Nardo, L.

AU - De Sanctis, E.

AU - Diefenthaler, M.

AU - Di Nezza, P.

AU - Düren, M.

AU - Ehrenfried, M.

AU - Elbakian, G.

AU - Ellinghaus, F.

AU - Etzelmüller, E.

AU - Fabbri, R.

AU - Fantoni, A.

AU - Felawka, L.

AU - Frullani, S.

AU - Gapienko, G.

AU - Gapienko, V.

AU - Garibaldi, F.

AU - Gavrilov, G.

AU - Gharibyan, V.

AU - Giordano, F.

AU - Gliske, S.

AU - Golembiovskaya, M.

AU - Gregor, I. M.

AU - Guler, H.

AU - Hartig, M.

AU - Hasch, D.

AU - Hillenbrand, A.

AU - Hoek, M.

AU - Holler, Y.

AU - Hristova, I.

AU - Ivanilov, A.

AU - Jackson, H. E.

AU - Jo, H. S.

AU - Joosten, S.

AU - Kaiser, R.

AU - Karyan, G.

AU - Keri, T.

AU - Kinney, E.

AU - Kisselev, A.

AU - Korotkov, V.

AU - Kozlov, V.

AU - Krauss, B.

AU - Kravchenko, P.

AU - Krivokhijine, V. G.

AU - Lagamba, L.

AU - Lapikás, L.

AU - Lehmann, I.

AU - Lenisa, P.

AU - López Ruiz, A.

AU - Lorenzon, W.

AU - Lu, S.

AU - Lu, X.

AU - Ma, B. Q.

AU - Mahon, D.

AU - Makins, N. C.R.

AU - Manaenkov, S. I.

AU - Manfré, L.

AU - Mao, Y.

AU - Marianski, B.

AU - Martinez De La Ossa, A.

AU - Marukyan, H.

AU - Miller, C. A.

AU - Miyachi, Y.

AU - Movsisyan, A.

AU - Murray, M.

AU - Mussgiller, A.

AU - Nappi, E.

AU - Naryshkin, Y.

AU - Nass, A.

AU - Negodaev, M.

AU - Nowak, W. D.

AU - Osborne, A.

AU - Pappalardo, L. L.

AU - Perez-Benito, R.

AU - Petrosyan, A.

AU - Reimer, P. E.

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 - Schäfer, A.

AU - Schnell, G.

AU - Schüler, K. P.

AU - Seitz, B.

AU - Shearer, C.

AU - Shibata, T. A.

AU - Shutov, V.

AU - Stancari, M.

AU - Statera, M.

AU - Steijger, J. J.M.

AU - Stewart, J.

AU - Taroian, S.

AU - Terkulov, A.

AU - Truty, R.

AU - Trzcinski, A.

AU - Tytgat, M.

AU - Van Haarlem, Y.

AU - Van Hulse, C.

AU - Veretennikov, D.

AU - Vikhrov, V.

AU - Vilardi, I.

AU - Wang, S.

AU - Yaschenko, S.

AU - Ye, Z.

AU - Yen, S.

AU - Zagrebelnyy, V.

AU - Zeiler, D.

AU - Zihlmann, B.

AU - Zupranski, P.

PY - 2012/10

Y1 - 2012/10

N2 - The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized Hera positron beam scattering off an unpolarized hydrogen target is measured at Hermes. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of ep → epγ events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of background from ep → eNπγ events, which was estimated to contribute an average of about 12% to the signal in previous Hermes publications. The removal of this background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0:054 ± 0:016 to - 0:328 ± 0:027 (stat:) ± 0:045 (syst:).

AB - The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized Hera positron beam scattering off an unpolarized hydrogen target is measured at Hermes. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of ep → epγ events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of background from ep → eNπγ events, which was estimated to contribute an average of about 12% to the signal in previous Hermes publications. The removal of this background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0:054 ± 0:016 to - 0:328 ± 0:027 (stat:) ± 0:045 (syst:).

KW - Lepton-Nucleon Scattering

UR - https://www.scopus.com/pages/publications/84868134354

U2 - 10.1007/JHEP10(2012)042

DO - 10.1007/JHEP10(2012)042

M3 - Article

AN - SCOPUS:84868134354

SN - 1029-8479

VL - 2012

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 10

M1 - 042

ER -

Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this