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Measurement of Deeply Virtual Compton Scattering Beam-Spin Asymmetries
- Source :
- Physical Review Letters, Physical Review Letters, American Physical Society, 2008, 100, pp.162002. ⟨10.1103/PhysRevLett.100.162002⟩, Physical Review Letters, 2008, 100, pp.162002. ⟨10.1103/PhysRevLett.100.162002⟩, 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, Stepanyan, S, Stoler, P, Ungaro, M, Zhao, B, Amaryan, M J, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Bagdasaryan, H, Baillie, N, Ball, J P, Baltzell, N A, Batourine, V, Battaglieri, M, Bellis, M, Benmouna, N, Berman, B L, Biselli, A S, Blaszczyk, L, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, W J, Brooks, W K, Bultmann, S, Butuceanu, C, Calarco, J R, Careccia, S L, Carman, D S & Casey, L & Watts, D P 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
- Publication Year :
- 2008
- Publisher :
- HAL CCSD, 2008.
-
Abstract
- 1 tex file (6 pages), 4 (eps) figures; The beam spin asymmetries in the hard exclusive electroproduction of photons on the proton (ep -> epg) 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 GeV^2, -t from 0.09 to 1.8 GeV^2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A = 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.
- Subjects :
- Quark
Particle physics
Photon
Proton
media_common.quotation_subject
HERA
General Physics and Astronomy
Parton
Kinematics
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
01 natural sciences
Asymmetry
Nuclear physics
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
PARTON DISTRIBUTIONS, NUCLEON, HERA
NUCLEON
010306 general physics
Nuclear Experiment
media_common
Physics
010308 nuclear & particles physics
Compton scattering
12.40.Vv,13.40.Gp,13.60.Fz,13.60.Hb,13.60.-r,14.20.Dh,24.85.+p
PARTON DISTRIBUTIONS
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
High Energy Physics::Experiment
Nucleon
Subjects
Details
- Language :
- English
- ISSN :
- 00319007 and 10797114
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters, Physical Review Letters, American Physical Society, 2008, 100, pp.162002. ⟨10.1103/PhysRevLett.100.162002⟩, Physical Review Letters, 2008, 100, pp.162002. ⟨10.1103/PhysRevLett.100.162002⟩, 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, Stepanyan, S, Stoler, P, Ungaro, M, Zhao, B, Amaryan, M J, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Bagdasaryan, H, Baillie, N, Ball, J P, Baltzell, N A, Batourine, V, Battaglieri, M, Bellis, M, Benmouna, N, Berman, B L, Biselli, A S, Blaszczyk, L, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, W J, Brooks, W K, Bultmann, S, Butuceanu, C, Calarco, J R, Careccia, S L, Carman, D S & Casey, L & Watts, D P 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
- Accession number :
- edsair.doi.dedup.....a0e5b3aca787543fa76282c4d7b7ce90