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001     892607
005     20240610120650.0
024 7 _ |a 10.1140/epjc/s10052-021-09169-7
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024 7 _ |a 1434-6044
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024 7 _ |a 1434-6052
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037 _ _ |a FZJ-2021-02196
082 _ _ |a 530
100 1 _ |a von Detten, L.
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245 _ _ |a On the scalar ${\pi K}$ form factor beyond the elastic region
260 _ _ |a Heidelberg
|c 2021
|b Springer
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520 _ _ |a Pion–kaon (πK) pairs occur frequently as final states in heavy-particle decays. A consistent treatment of πK scattering and production amplitudes over a wide energy range is therefore mandatory for multiple applications: in Standard Model tests; to describe crossed channels in the quest for exotic hadronic states; and for an improved spectroscopy of excited kaon resonances. In the elastic region, the phase shifts of πK scattering in a given partial wave are related to the phases of the respective πK form factors by Watson’s theorem. Going beyond that, we here construct a representation of the scalar πK form factor that includes inelastic effects via resonance exchange, while fulfilling all constraints from πK scattering and maintaining the correct analytic structure. As a first application, we consider the decay τ→KSπντ, in particular, we study to which extent the S-wave K∗0(1430) and the P-wave K∗(1410) resonances can be differentiated and provide an improved estimate of the CP asymmetry produced by a tensor operator.
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536 _ _ |a DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076)
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700 1 _ |a Noël, F.
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700 1 _ |a Hanhart, Christoph
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700 1 _ |a Hoferichter, M.
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700 1 _ |a Kubis, B.
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773 _ _ |a 10.1140/epjc/s10052-021-09169-7
|g Vol. 81, no. 5, p. 420
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|t The European physical journal / C
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|y 2021
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856 4 _ |y OpenAccess
|u https://juser.fz-juelich.de/record/892607/files/Detten2021_Article_OnTheScalarVarvecPiK%CE%A0KFormFact.pdf
856 4 _ |y OpenAccess
|u https://juser.fz-juelich.de/record/892607/files/piKFFbeyond_arXiv.pdf
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