Beam-spin asymmetries from semi-inclusive pion electroproduction
- Gohn, W
- Avakian, H
- Joo, K
- Ungaro, M
- Adhikari K, P
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- Amaryan M, J
- Anderson M, D
- Pereira S, A
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- Bono, J
- Briscoe W, J
- Brooks W, K
- Burkert V, D
- Carman D, S
- Celentano, A
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- Cole P, L
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- Cortes, O
- Crede, V
- Dashyan, N
- De Vita, R
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- Eugenio, P
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- Hanretty, C
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- Hicks, K
- Ho, D
- Holtrop, M
- Hyde, C
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- Ireland D, G
- Ishkhanov B, S
- Jo H, S
- Keller, D
- Khandaker, M
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- Klein F, J
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- Kuleshov S, V
- Lenisa, P
- Livingston, K
- Lu H, Y
- MacGregor I. J, D
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- McKinnon, B
- Mineeva, T
- Mirazita, M
- Mokeev, V
- Movsisyan, A
- Nadel Turonski, P
- Niccolai, S
- Niculescu, I
- Osipenko, M
- Ostrovidov A, I
- Pappalardo L, L
- Paremuzyan, R
- Park, K
- Pasyuk, E
- Peng, P
- Phillips J, J
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- Procureur, S
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- Sharabian Y, G
- Simonyan, A
- Smith G, D
- Sober D, I
- Sokhan, D
- Stoler, P
- Strakovsky I, I
- Stepanyan, S
- Strauch, S
- Tang, W
- Tkachenko, S
- Vernarsky, B
- Voskanyan, H
- Voutier, E
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- Weinstein L, B
- Wood M, H
- Zachariou, N
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- Zhang, J
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- D'ANGELO, ANNALISA
DOIAbstract
We have measured the moment AsinϕLU corresponding to the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering. AsinϕLU is a twist-3 quantity providing information about quark-gluon correlations. Data were taken with the CLAS Spectrometer at Jefferson Lab using a 5.498 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. All three pion channels (π+, π0 and π−) were measured simultaneously over a large range of kinematics within the virtuality range Q2≈ 1.0–4.5 GeV2. The observable was measured with better than 1% statistical precision over a large range of z, PT, xB, and Q2, which permits comparison with several reaction models. The discussed measurements provide an upgrade in s...
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