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Single-spin azimuthal asymmetry in exclusive electroproduction of pi^+ mesons
- Source :
- Airapetian, A, Bulten, H J, Hesselink, W H A, Laziev, A, Schmidt, F, Simani, M C, Thomas, E, van den Brand, J F J, de Visser, J A G M & Volmer, J 2002, ' Single-spin azimuthal asymmetry in exclusive electroproduction of pi(+) mesons ', Physics Letters B, vol. 535, no. 1-4, pp. 85-92 . https://doi.org/10.1016/S0370-2693(02)01780-X, Physics Letters B, 535(1-4), 85-92. Elsevier, PHYSICS LETTERS B
- Publication Year :
- 2001
- Publisher :
- arXiv, 2001.
-
Abstract
- A single-spin asymmetry in the distribution of exclusively produced pi^+ 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 \phi 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).<br />Comment: PLB accepted version, 6 pages, 4 figures, LaTex (revtex4), corrected typo
- Subjects :
- Nuclear and High Energy Physics
Particle physics
Meson
media_common.quotation_subject
Virtual particle
FOS: Physical sciences
01 natural sciences
Asymmetry
NO
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
Positron
13.88.+e
0103 physical sciences
13.60.-r
13.60.Le
13.85.Fb
010306 general physics
Nuclear Experiment
media_common
Physics
010308 nuclear & particles physics
Scattering
LEADING ORDER
Polarization (waves)
Physics and Astronomy
Condensed Matter::Strongly Correlated Electrons
High Energy Physics::Experiment
Nucleon
Lepton
Subjects
Details
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Airapetian, A, Bulten, H J, Hesselink, W H A, Laziev, A, Schmidt, F, Simani, M C, Thomas, E, van den Brand, J F J, de Visser, J A G M & Volmer, J 2002, ' Single-spin azimuthal asymmetry in exclusive electroproduction of pi(+) mesons ', Physics Letters B, vol. 535, no. 1-4, pp. 85-92 . https://doi.org/10.1016/S0370-2693(02)01780-X, Physics Letters B, 535(1-4), 85-92. Elsevier, PHYSICS LETTERS B
- Accession number :
- edsair.doi.dedup.....b154a2d4e750c2c3bd15fe8ffe7e01eb
- Full Text :
- https://doi.org/10.48550/arxiv.hep-ex/0112022