Physical Review Letters
The first measurements of the transferred polarization for the exclusive →ep → e'K+ →Λ over right arrow reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5 (GeV/c)2, W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the s -s quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.
Original Publication Citation
Carman, D.S., Dodge, G.E., Hyde-Wright, C.E., Kuhn, S.E., Weinstein, L.B., Zhou, Z. (2003). First measurement of transferred polarization in the exclusive →e p → e'K+ →Λ Physical Review Letters, 90(13), 1-6, Article 131804. https://doi.org/10.1103/PhysRevLett.90.131804
0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde-Wright), 0000-0003-2243-6836 (Kuhn), 0000-0001-5416-2900 (Weinstein)
Bektasoglu, M.; Dharmawardane, K. V.; Dodge, G. E.; Forest, T. A.; Hyde-Wright, C. E.; Klimenko, A. V.; Kuhn, S. E.; Niyazov, R. A.; Qin, L. M.; Weinstein, L. B.; and Yun, J., "First Measurement of Transferred Polarization in the Exclusive →e p → e'K+ →Λ" (2003). Physics Faculty Publications. 504.