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Differential cross sections for {Λ}(1520) using photoproduction at CLAS

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arxiv 2101.06134 v1 pith:UO42BIJ5 submitted 2021-01-15 hep-ex

Differential cross sections for {Λ}(1520) using photoproduction at CLAS

U. Shrestha , T. Chetry , C. Djalali , K. Hicks , S.i. Nam , K.P. Adhikari , S. Adhikari , M.J. Amaryan
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classification hep-ex
keywords lambdacrossdifferentialsectionsclasfunctionphotoproductionreaction
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The reaction $\gamma p \rightarrow K^{+} \Lambda(1520)$ using photoproduction data from the CLAS $g12$ experiment at Jefferson Lab is studied. The decay of $\Lambda(1520)$ into two exclusive channels, $\Sigma^{+}\pi^{-}$ and $\Sigma^{-}\pi^{+}$, is studied from the detected $K^{+}$, $\pi^{+}$, and $\pi^{-}$ particles. A good agreement is established for the $\Lambda(1520)$ differential cross sections with the previous CLAS measurements. The differential cross sections as a function of CM angle are extended to higher photon energies. Newly added are the differential cross sections as a function of invariant 4-momentum transfer $t$, which is the natural variable to use for a theoretical model based on a Regge-exchange reaction mechanism. No new $N^*$ resonances decaying into the $K^+\Lambda(1520)$ final state are found.

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