Excitation of the quasi-bound state in 4He by electron scattering at medium momentum transfer

Experimental confirmation of the Λ(1405)

Experimental confirmation of the Λ(1405) Ansatz from resonant formation of a K−p quasi-bound state in K− absorption by 3He and 4He

✍ Jafar Esmaili; Yoshinori Akaishi; Toshimitsu Yamazaki 📂 Article 📅 2010 🏛 Elsevier Science 🌐 English ⚖ 144 KB

The Σπ invariant-mass spectra in the resonant capture of K -at rest in 4 He, 3 He and d are calculated by a coupled-channel procedure for a K -p quasi-bound state of an arbitrary chosen mass (M) and width (Γ). A χ 2 analysis of old 4 He bubble chamber data shows a dominance of the s-orbit absorption