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Measurement of single- and double-polarization observables in the photoproduction of $π^{+} π^{-}$ meson pairs off the proton using CLAS at Jefferson Laboratory

https://doi.org/10.1103/bddq-9qlq

Roy, P; Cao, S; Crede, V; Klempt, E; Nikonov, V A; Sarantsev, A V; Burkert, V D; Mokeev, V; Achenbach, P; Alvarado, J S; et al (September 2025, Physical Review C)

Free, publicly-accessible full text available September 1, 2026
$$K^{+}\Lambda $$ photoproduction at forward angles and low momentum transfer

https://doi.org/10.1140/epja/s10050-021-00392-0

Alef, S.; Bauer, P.; Bayadilov, D.; Beck, R.; Bella, A.; Bieling, J.; Braghieri, A.; Cole, P. L.; Elsner, D.; Di Salvo, R.; et al (February 2021, The European Physical Journal A)
null (Ed.)
Abstract $$\gamma p \rightarrow K^{+} \Lambda $$ γ p → K + Λ differential cross sections and recoil polarisation data from threshold for extremely forward angles are presented. The measurements were performed at the BGOOD experiment at ELSA, utilising the high angular and momentum resolution forward spectrometer for charged particle identification. The high statistics and forward angle acceptance enables the extraction of the cross section as the minimum momentum transfer to the recoiling hyperon is approached.
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First Measurements of the Double-Polarization Observables $F$ , $P$ , and $H$ in $ω$ Photoproduction off Transversely Polarized Protons in the $N^{*}$ Resonance Region

https://doi.org/10.1103/PhysRevLett.122.162301

Roy, P.; Park, S.; Crede, V.; Anisovich, A. V.; Klempt, E.; Nikonov, V. A.; Sarantsev, A. V.; Wei, N. C.; Huang, F.; Nakayama, K.; et al (April 2019, Physical Review Letters)
Beam-target helicity asymmetry $E$ in $K^{0} Λ$ and $K^{0} Σ^{0}$ photoproduction on the neutron

https://doi.org/10.1103/PhysRevC.98.045205

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.; et al (October 2018, Physical Review C)
Beam-Target Helicity Asymmetry for $\vec{γ} \vec{n} \to π^{-} p$ in the $N^{*}$ Resonance Region

https://doi.org/10.1103/PhysRevLett.118.242002

Ho, D.; Peng, P.; Bass, C.; Collins, P.; D’Angelo, A.; Deur, A.; Fleming, J.; Hanretty, C.; Kageya, T.; Khandaker, M.; et al (June 2017, Physical Review Letters)
Measurement of the differential and total cross sections of the $γ d \to K^{0} Λ (p)$ reaction within the resonance region

https://doi.org/10.1103/PhysRevC.96.065201

Compton, N.; Taylor, C. E.; Hicks, K.; Cole, P.; Zachariou, N.; Ilieva, Y.; Nadel-Turonski, P.; Klempt, E.; Nikonov, V. A.; Sarantsev, A. V.; et al (December 2017, Physical Review C)

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