Investigation of the $K^{-}pp$ Bound State via the $ K^{-} + {}^{3}\mathrm{He} $ Reaction

Sajjad Marri; Ahmad Naderi Beni

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arXiv · 2602.19716

Investigation of the $K^{-}pp$ Bound State via the $ K^{-} + {}^{3}\mathrm{He} $ Reaction

Sajjad Marri·Ahmad Naderi Beni

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Abstract

Using the four-body Alt-Grassberger-Sandhas (AGS) equations for the $ K^{-}ppn $ system, we investigate the possible formation of a $ K^{-}pp $ quasi-bound state through the low-energy $ K^{-} + {}^{3}\mathrm{He} $ reaction. The neutron missing mass spectrum in the final state was calculated for different models of the $ \bar{K}N $ interaction. The results indicate that, irrespective of the specific nature of the $ \Lambda(1405) $ structure or the details of the $ \bar{K}N $ interaction model, a signal corresponding to the $ K^{-}pp $ quasi-bound state could appear in the $ \pi \Sigma p $ mass spectrum. This supports the feasibility of observing the $ K^{-}pp $ cluster in low-energy kaon-induced reactions on helium-3.

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Sajjad Marri, Ahmad Naderi Beni. 2026-02-23. Investigation of the $K^{-}pp$ Bound State via the $ K^{-} + {}^{3}\mathrm{He} $ Reaction. https://arxiv.org/abs/2602.19716

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