Measurement of deeply virtual compton scattering beam-spin asymmetries

CLAS Collaboration; F. X. Girod; R. A. Niyazov; H. Avakian; J. Ball; I. Bedlinskiy; V. D. Burkert; R. De Masi; L. Elouadrhiri; M. Garcon; M. Guidal; H. S. Jo; K. Joo; V. Kubarovsky; S. V. Kuleshov; M. MacCormick; S. Niccolai; O. Pogorelko; F. Sabatie; S. Stepanyan; P. Stoler; M. Ungaro; B. Zhao; M. J. Amaryan; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; V. Batourine; M. Battaglieri; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; L. Blaszczyk; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bultmann; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; L. Casey; D. P. Watts

doi:10.1103/PhysRevLett.100.162002

Measurement of deeply virtual compton scattering beam-spin asymmetries

CLAS Collaboration, F. X. Girod, R. A. Niyazov, H. Avakian, J. Ball, I. Bedlinskiy, V. D. Burkert, R. De Masi, L. Elouadrhiri, M. Garcon, M. Guidal, H. S. Jo, K. Joo, V. Kubarovsky, S. V. Kuleshov, M. MacCormick, S. Niccolai, O. Pogorelko, F. Sabatie, S. StepanyanP. Stoler, M. Ungaro, B. Zhao, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, M. Battaglieri, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bultmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, D. P. Watts

School of Physics and Astronomy

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Abstract / Description of output

The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e(->)p -> ep gamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q(2) from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A similar or equal to a sin phi/(1+c cos phi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

Original language	English
Article number	162002
Number of pages	6
Journal	Physical Review Letters
Volume	100
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.100.162002
Publication status	Published - 25 Apr 2008

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CLAS Collaboration, Girod, F. X., Niyazov, R. A., Avakian, H., Ball, J., Bedlinskiy, I., Burkert, V. D., De Masi, R., Elouadrhiri, L., Garcon, M., Guidal, M., Jo, H. S., Joo, K., Kubarovsky, V., Kuleshov, S. V., MacCormick, M., Niccolai, S., Pogorelko, O., Sabatie, F., ... Watts, D. P. (2008). Measurement of deeply virtual compton scattering beam-spin asymmetries. Physical Review Letters, 100(16), Article 162002. https://doi.org/10.1103/PhysRevLett.100.162002

@article{2350bd5ecfb84d9688422e415bcc6749,

title = "Measurement of deeply virtual compton scattering beam-spin asymmetries",

abstract = "The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e(->)p -> ep gamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q(2) from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A similar or equal to a sin phi/(1+c cos phi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.",

author = "{CLAS Collaboration} and Girod, {F. X.} and Niyazov, {R. A.} and H. Avakian and J. Ball and I. Bedlinskiy and Burkert, {V. D.} and {De Masi}, R. and L. Elouadrhiri and M. Garcon and M. Guidal and Jo, {H. S.} and K. Joo and V. Kubarovsky and Kuleshov, {S. V.} and M. MacCormick and S. Niccolai and O. Pogorelko and F. Sabatie and S. Stepanyan and P. Stoler and M. Ungaro and B. Zhao and Amaryan, {M. J.} and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and Baltzell, {N. A.} and V. Batourine and M. Battaglieri and M. Bellis and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and L. Blaszczyk and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and S. Bultmann and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and L. Casey and Watts, {D. P.}",

year = "2008",

month = apr,

day = "25",

doi = "10.1103/PhysRevLett.100.162002",

language = "English",

volume = "100",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "16",

}

CLAS Collaboration, Girod, FX, Niyazov, RA, Avakian, H, Ball, J, Bedlinskiy, I, Burkert, VD, De Masi, R, Elouadrhiri, L, Garcon, M, Guidal, M, Jo, HS, Joo, K, Kubarovsky, V, Kuleshov, SV, MacCormick, M, Niccolai, S, Pogorelko, O, Sabatie, F, Stepanyan, S, Stoler, P, Ungaro, M, Zhao, B, Amaryan, MJ, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Batourine, V, Battaglieri, M, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Blaszczyk, L, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bultmann, S, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Casey, L & Watts, DP 2008, 'Measurement of deeply virtual compton scattering beam-spin asymmetries', Physical Review Letters, vol. 100, no. 16, 162002. https://doi.org/10.1103/PhysRevLett.100.162002

TY - JOUR

T1 - Measurement of deeply virtual compton scattering beam-spin asymmetries

AU - CLAS Collaboration

AU - Girod, F. X.

AU - Niyazov, R. A.

AU - Avakian, H.

AU - Ball, J.

AU - Bedlinskiy, I.

AU - Burkert, V. D.

AU - De Masi, R.

AU - Elouadrhiri, L.

AU - Garcon, M.

AU - Guidal, M.

AU - Jo, H. S.

AU - Joo, K.

AU - Kubarovsky, V.

AU - Kuleshov, S. V.

AU - MacCormick, M.

AU - Niccolai, S.

AU - Pogorelko, O.

AU - Sabatie, F.

AU - Stepanyan, S.

AU - Stoler, P.

AU - Ungaro, M.

AU - Zhao, B.

AU - Amaryan, M. J.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Batourine, V.

AU - Battaglieri, M.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Blaszczyk, L.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bultmann, S.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Casey, L.

AU - Watts, D. P.

PY - 2008/4/25

Y1 - 2008/4/25

N2 - The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e(->)p -> ep gamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q(2) from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A similar or equal to a sin phi/(1+c cos phi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

AB - The beam-spin asymmetries in the hard exclusive electroproduction of photons on the proton (e(->)p -> ep gamma) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x(B) from 0.11 to 0.58, Q(2) from 1 to 4.8 GeV2, -t from 0.09 to 1.8 GeV2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A similar or equal to a sin phi/(1+c cos phi). This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

U2 - 10.1103/PhysRevLett.100.162002

DO - 10.1103/PhysRevLett.100.162002

M3 - Article

SN - 0031-9007

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

IS - 16

M1 - 162002

ER -

Measurement of deeply virtual compton scattering beam-spin asymmetries

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