Partial-wave analysis to determine the spin of Ξ(1690)^- and Ξ(1820)^- produced in pp annihilation

2024/09/07 by Pachattu, Deepak
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2409.04886

Abstract

Recently [arXiv:2201.03852v2] the PANDA collaboration studied the feasibility of determining the spin and parity of the Ξ(1690)^-and Ξ(1820)^- resonances in the ΛK^- system produced in pp collisions via the reaction channel p p → Ξ⁺ ΛK^-. This contribution aims to study these reactions using a model-independent irreducible tensor formalism developed earlier. This study leads us to identify the partial-wave amplitude, which would be zero if Ξ(1690)^- or Ξ(1820)^- had spin-1/2, provided these resonances are produced at threshold (s-wave production).

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