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.

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

SANDORFI, ANDREW MICHAEL;Barion, L.;Ciullo, G.;Contalbrigo, M.;Lenisa, P.;Movsisyan, A.;
2018

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.
Ho, D. H.; Schumacher, R. A.; D'Angelo, A.; Deur, A.; Fleming, J.; Hanretty, C.; Kageya, T.; Klein, F. J.; Klempt, E.; Lowry, M. M.; Lu, H.; Nikonov, V. A.; Peng, P.; Sandorfi, ANDREW MICHAEL; Sarantsev, A. V.; Strakovsky, I. I.; Walford, N. K.; Wei, X.; Workman, R. L.; Adhikari, K. P.; Adhikari, S.; Adikaram, D.; Akbar, Z.; Ball, J.; Barion, L.; Bashkanov, M.; Bass, C. D.; Battaglieri, M.; Bedlinskiy, I.; Biselli, A. S.; Briscoe, W. J.; Boiarinov, S.; Burkert, V. D.; Cao, F.; Carman, D. S.; Celentano, A.; Chandavar, S.; Charles, G.; Chatagnon, P.; Chetry, T.; Ciullo, G.; Clary, B. A.; Cole, P.; Collins, P.; Contalbrigo, M.; Crede, V.; De Vita, R.; Defurne, M.; Diehl, S.; Djalali, C.; Dupre, R.; Egiyan, H.; Ehrhart, M.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Fersch, R.; Filippi, A.; Fradi, A.; Ghandilyan, Y.; Giovanetti, K. L.; Girod, F. X.; Gohn, W.; Golovatch, E.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Hafidi, K.; Hakobyan, H.; Harrison, N.; Hattawy, M.; Heddle, D.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jenkins, D.; Jo, H. S.; Johnston, S.; Kabir, M. L.; Keller, D.; Khachatryan, G.; Khachatryan, M.; Khandaker, M.; Kim, A.; Kim, W.; Klein, A.; Kubarovsky, V.; Laine, V.; Lanza, L.; Lenisa, P.; Livingston, K.; Macgregor, I. J. D.; Marchand, D.; Markov, N.; Mayer, M.; Mckinnon, B.; Meyer, C. A.; Mirazita, M.; Mokeev, V.; Montgomery, R. A.; Movsisyan, A.; Munoz Camacho, C.; Nadel-Turonski, P.; Niccolai, S.; Niculescu, G.; O'Connell, T.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Paremuzyan, R.; Park, K.; Pasyuk, E.; Pogorelko, O.; Price, J. W.; Prok, Y.; Protopopescu, D.; Rehfuss, M.; Ripani, M.; Riser, D.; Rizzo, A.; Rosner, G.; Sabatié, F.; Salgado, C.; Sharabian, Y. G.; Skorodumina, Iu.; Smith, G. D.; Sober, D. I.; Sokhan, D.; Sparveris, N.; Strauch, S.; Taiuti, M.; Tan, J. A.; Ungaro, M.; Voskanyan, H.; Voutier, E.; Wang, R.; Watts, D. P.; Weinstein, L. B.; Whisnant, C. S.; Wood, M. H.; Zachariou, N.; Zhang, J.; Zhao, Z. W.; Zonta, I.
File in questo prodotto:
File Dimensione Formato  
2018_PhysRevC.98.045205_beam_target_helicity.pdf

solo gestori archivio

Descrizione: Full text editoriale
Tipologia: Full text (versione editoriale)
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 1.88 MB
Formato Adobe PDF
1.88 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
1805.04561.pdf

accesso aperto

Descrizione: Pre-print
Tipologia: Pre-print
Licenza: Creative commons
Dimensione 860.82 kB
Formato Adobe PDF
860.82 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2400500
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 9
social impact