e1-dvcs E06-003
- Spokespersons
- V. D. Burkert, L. Elouadrhiri, M. Garçon, S. Stepanyan
- Year
- 2007
- Abstract
- The beam spin asymmetry (BSA) in the exclusive reaction ep → epπ0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer (CLAS). The xb, Q2, t, and φ dependences of the π0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin φ function and their amplitudes are extracted. Overall, they are of the order of 0.04 - 0.11 and roughly independent of t. This is the signature of a non-zero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.
- Publication
-
- R. De Masi, M. Garçon, B. Zhao, and CLAS Collaboration Beam spin asymmetry in deep and exclusive π0 electroproduction // arXiv:0711.4736
- Quantities
- A
Measurements
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ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
---|---|---|---|---|---|---|---|---|
E25M1 | A | e | p | π0p | 1.07 | 1.16 | None | None |
E25M2 | A | e | p | π0p | 1.14 | 1.17 | None | None |
E25M3 | A | e | p | π0p | 1.06 | 1.17 | None | None |
E25M4 | A | e | p | π0p | 1.12 | 1.16 | None | None |
E25M5 | A | e | p | π0p | 1.14 | 1.18 | None | None |
E25M6 | A | e | p | π0p | 1.33 | 1.37 | None | None |
E25M7 | A | e | p | π0p | 1.34 | 1.4 | None | None |
E25M8 | A | e | p | π0p | 1.23 | 1.37 | None | None |
E25M9 | A | e | p | π0p | 1.32 | 1.36 | None | None |
E25M10 | A | e | p | π0p | 1.27 | 1.47 | None | None |
E25M11 | A | e | p | π0p | 1.53 | 1.63 | None | None |
E25M12 | A | e | p | π0p | 1.55 | 1.59 | None | None |
E25M13 | A | e | p | π0p | 1.43 | 1.57 | None | None |
E25M14 | A | e | p | π0p | 1.51 | 1.58 | None | None |
E25M15 | A | e | p | π0p | 1.47 | 1.61 | None | None |
E25M16 | A | e | p | π0p | 1.59 | 1.69 | None | None |
E25M17 | A | e | p | π0p | 1.64 | 1.73 | None | None |
E25M18 | A | e | p | π0p | 1.65 | 1.76 | None | None |
E25M19 | A | e | p | π0p | 1.65 | 1.76 | None | None |
E25M20 | A | e | p | π0p | 1.64 | 1.72 | None | None |
E25M21 | A | e | p | π0p | 1.82 | 1.98 | None | None |
E25M22 | A | e | p | π0p | 1.87 | 2.05 | None | None |
E25M23 | A | e | p | π0p | 1.87 | 2.06 | None | None |
E25M24 | A | e | p | π0p | 1.89 | 2.0 | None | None |
E25M25 | A | e | p | π0p | 1.88 | 2.08 | None | None |
E25M26 | A | e | p | π0p | 2.1 | 2.27 | None | None |
E25M27 | A | e | p | π0p | 2.09 | 2.38 | None | None |
E25M28 | A | e | p | π0p | 2.04 | 2.51 | None | None |
E25M29 | A | e | p | π0p | 2.06 | 2.22 | None | None |
E25M30 | A | e | p | π0p | 2.16 | 2.28 | None | None |
E25M31 | A | e | p | π0p | 1.83 | 1.97 | None | None |
E25M32 | A | e | p | π0p | 1.9 | 2.04 | None | None |
E25M33 | A | e | p | π0p | 1.9 | 2.11 | None | None |
E25M34 | A | e | p | π0p | 1.95 | 2.05 | None | None |
E25M35 | A | e | p | π0p | 1.99 | 2.07 | None | None |
E25M36 | A | e | p | π0p | 2.2 | 2.23 | None | None |
E25M37 | A | e | p | π0p | 2.12 | 2.35 | None | None |
E25M38 | A | e | p | π0p | 2.25 | 2.4 | None | None |
E25M39 | A | e | p | π0p | 2.23 | 2.42 | None | None |
E25M40 | A | e | p | π0p | 2.33 | 2.44 | None | None |
E25M41 | A | e | p | π0p | 2.42 | 2.55 | None | None |
E25M42 | A | e | p | π0p | 2.52 | 2.71 | None | None |
E25M43 | A | e | p | π0p | 2.64 | 2.74 | None | None |
E25M44 | A | e | p | π0p | 2.63 | 2.95 | None | None |
E25M45 | A | e | p | π0p | 2.64 | 2.99 | None | None |
E25M46 | A | e | p | π0p | 2.71 | 2.88 | None | None |
E25M47 | A | e | p | π0p | 2.87 | 3.1 | None | None |
E25M48 | A | e | p | π0p | 3.0 | 3.18 | None | None |
E25M49 | A | e | p | π0p | 3.01 | 3.21 | None | None |
E25M50 | A | e | p | π0p | 2.93 | 3.19 | None | None |
E25M51 | A | e | p | π0p | 2.54 | 2.74 | None | None |
E25M52 | A | e | p | π0p | 2.53 | 2.83 | None | None |
E25M53 | A | e | p | π0p | 2.66 | 2.82 | None | None |
E25M54 | A | e | p | π0p | 2.71 | 2.82 | None | None |
E25M55 | A | e | p | π0p | 3.12 | 3.24 | None | None |
E25M56 | A | e | p | π0p | 3.21 | 3.33 | None | None |
E25M57 | A | e | p | π0p | 3.08 | 3.4 | None | None |
E25M58 | A | e | p | π0p | 3.06 | 3.42 | None | None |
E25M59 | A | e | p | π0p | 3.48 | 3.67 | None | None |
E25M60 | A | e | p | π0p | 3.58 | 3.81 | None | None |
E25M61 | A | e | p | π0p | 3.61 | 4.0 | None | None |
E25M62 | A | e | p | π0p | 3.55 | 4.05 | None | None |
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