# Strange Hadron Spectroscopy with Secondary KL Beam in Hall D

Abstract : We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF electron beam will enable a flux on the order of $1\times 10^4~K_L/sec$, which exceeds the flux of that previously attained at SLAC by three orders of magnitude. The use of a deuteron target will provide first measurements ever with neutral kaons on neutrons. The experiment will measure both differential cross sections and self-analyzed polarizations of the produced $\Lambda$, $\Sigma$, $\Xi$, and $\Omega$ hyperons using the GlueX detector at the Jefferson Lab Hall D. The measurements will span CM $\cos\theta$ from $-0.95$ to 0.95 in the range W = 1490 MeV to 2500 MeV. The new data will significantly constrain the partial wave analyses and reduce model-dependent uncertainties in the extraction of the properties and pole positions of the strange hyperon resonances, and establish the orbitally excited multiplets in the spectra of the $\Xi$ and $\Omega$ hyperons. Comparison with the corresponding multiplets in the spectra of the charm and bottom hyperons will provide insight into he accuracy of QCD-based calculations over a large range of masses. The proposed facility will have a defining impact in the strange meson sector through measurements of the final state $K\pi$ system up to 2 GeV invariant mass. This will allow the determination of pole positions and widths of all relevant $K^\ast(K\pi)$ $S$-,$P$-,$D$-,$F$-, and $G$-wave resonances, settle the question of the existence or nonexistence of scalar meson $\kappa/K_0^\ast(700)$ and improve the constrains on their pole parameters. Subsequently improving our knowledge of the low-lying scalar nonet in general.
Document type :
Preprints, Working Papers, ...
Domain :

http://hal.in2p3.fr/in2p3-03042546
Contributor : Sabine Starita <>
Submitted on : Sunday, December 6, 2020 - 9:36:32 PM
Last modification on : Tuesday, December 8, 2020 - 3:06:13 AM

### Identifiers

• HAL Id : in2p3-03042546, version 1
• ARXIV : 2008.08215

### Citation

Moskov Amaryan, Mikhail Bashkanov, Sean Dobbs, James Ritman, Justin Stevens, et al.. Strange Hadron Spectroscopy with Secondary KL Beam in Hall D. 2020. ⟨in2p3-03042546⟩

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