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Photoproduction of K^{+}K^{-} Pairs in Ultraperipheral Collisions.
Phys Rev Lett
May 2024
INFN, Sezione di Pavia, Pavia, Italy.
K^{+}K^{-} pairs may be produced in photonuclear collisions, either from the decays of photoproduced ϕ(1020) mesons or directly as nonresonant K^{+}K^{-} pairs. Measurements of K^{+}K^{-} photoproduction probe the couplings between the ϕ(1020) and charged kaons with photons and nuclear targets. The kaon-proton scattering occurs at energies far above those available elsewhere.
View Article and Find Full Text PDFKaon Photoproduction and the Λ Decay Parameter α_{-}.
Phys Rev Lett
November 2019
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, 53115 Bonn, Germany.
The weak decay parameter α_{-} of the Λ is an important quantity for the extraction of polarization observables in various experiments. Moreover, in combination with α_{+} from Λ[over ¯] decay it provides a measure for matter-antimatter asymmetry. The weak decay parameter also affects the decay parameters of the Ξ and Ω baryons and, in general, any quantity in which the polarization of the Λ is relevant.
View Article and Find Full Text PDFCoherent rho;{0} photoproduction in bulk matter at high energies.
Phys Rev Lett
August 2009
Lawrence Berkeley National Laboratory, Berkeley, California, 94720, USA.
The momentum transfer Deltak required for a photon to scatter from a target and emerge as a rho;{0} decreases as the photon energy k rises. For k > 3 x 10;{14} eV, Deltak is small enough that the interaction cannot be localized to a single nucleus. At still higher energies, photons may coherently scatter elastically from bulk matter and emerge as a rho;{0}, in a manner akin to kaon regeneration.
View Article and Find Full Text PDFNodal trajectories of spin observables and kaon photoproduction dynamics.
Phys Rev C Nucl Phys
January 1996
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