Beam-target helicity asymmetry E in K0Λ and K0Σ0 photoproduction on the neutron

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, A. M.; 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.; The CLAS Collaboration

doi:10.1103/PhysRevC.98.045205

A study of

Λ_{b}^{0}

and

Ξ_{b}^{0}

decays to

Λ h^{+} h^{' -}

(

h^{(')} = π, K

) is performed using

p p

collision data collected by the LHCb experiment during LHC Runs 1–2, corresponding to an integrated luminosity of

9 {fb}^{- 1}

. The branching fractions for these decays are measured using the

Λ_{b}^{0} \to Λ_{c}^{+} (\to Λ π^{+}) π^{-}

decay as a control channel. The decays

Λ_{b}^{0} \to Λ π^{+} π^{-}

and

Ξ_{b}^{0} \to Λ K^{-} π^{+}

are observed for the first time. For decay modes with sufficient signal yields,

C P

asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for

C P

violation in the

Λ_{b}^{0} \to Λ K^{+} K^{-}

decay, interpreted as originating primarily from an asymmetric

Λ_{b}^{0} \to N^{* +} K^{-}

decay amplitude. The measured

C P

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