We report the first measurements of the E beam-target helicity asymmetry for the γ - n - →K0Λ and K0Σ0 channels in the energy range 1.70≤W≤2.34 GeV. The CLAS system at Jefferson Lab uses a circularly polarized photon beam and a target consisting of longitudinally polarized solid molecular hydrogen deuteride with low background contamination for the measurements. The multivariate analysis method boosted decision trees is used to isolate the reactions of interest. Comparisons with predictions from the KaonMAID, SAID, and Bonn-Gatchina models are presented. These results will help separate the isospin I=0 and I=1 photocoupling transition amplitudes in pseudoscalar meson photoproduction.

Ho, D.h., Schumacher, R.a., D'Angelo, A., Deur, A., Fleming, J., Hanretty, C., et al. (2018). Beam-target helicity asymmetry e in K0 Λ and K0 Σ0 photoproduction on the neutron. PHYSICAL REVIEW C, 98(4) [10.1103/PhysRevC.98.045205].

Beam-target helicity asymmetry e in K0 Λ and K0 Σ0 photoproduction on the neutron

D'Angelo, A.
Supervision
;
Lanza, L.;Rizzo, A.
Membro del Collaboration Group
;
Zonta, I.
2018-10-19

Abstract

We report the first measurements of the E beam-target helicity asymmetry for the γ - n - →K0Λ and K0Σ0 channels in the energy range 1.70≤W≤2.34 GeV. The CLAS system at Jefferson Lab uses a circularly polarized photon beam and a target consisting of longitudinally polarized solid molecular hydrogen deuteride with low background contamination for the measurements. The multivariate analysis method boosted decision trees is used to isolate the reactions of interest. Comparisons with predictions from the KaonMAID, SAID, and Bonn-Gatchina models are presented. These results will help separate the isospin I=0 and I=1 photocoupling transition amplitudes in pseudoscalar meson photoproduction.
19-ott-2018
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
Nuclear and High Energy Physics
CLAS Collaboration; HD-ice
http://harvest.aps.org/bagit/articles/10.1103/PhysRevC.98.045205/apsxml
Ho, D.h., Schumacher, R.a., D'Angelo, A., Deur, A., Fleming, J., Hanretty, C., et al. (2018). Beam-target helicity asymmetry e in K0 Λ and K0 Σ0 photoproduction on the neutron. PHYSICAL REVIEW C, 98(4) [10.1103/PhysRevC.98.045205].
Ho, Dh; Schumacher, Ra; D'Angelo, A; Deur, A; Fleming, J; Hanretty, C; Kageya, T; Klein, Fj; Klempt, E; Lowry, Mm; Lu, H; Nikonov, Va; Peng, P; Sandor...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/207339
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