#norelated
* Study of Hyperon Resonances below KbarN threshold via the (K-,n) reaction on deuteron [#hae650aa]

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** Introduction [#oc2fcf3e]

- Structure of Λ(1405)

~The Λ(1405) hyperon is a well-known hyperon resonance with the mass, width and spin-parity of 1405.1+1.3-1.0 MeV/c2, 50 MeV, and 1/2-, which is located just below the KbarN threshold. 
There is a long-standing puzzle whether the Λ(1405) is a KbarN bound state or not. 

- What we measure/How we measure?

//#ref(reaction.png,right,wrap,around)
~We propose an experiment at the J-PARC K1.8BR beam line to study the Λ(1405) hyperon via the (K-,n) reaction on deuteron, where a 1 GeV/c kaon is incident on the deuteron target knocking out a neutron at the forward angle and a recoiled kaon can be scattered with a residual nucleon to form the Λ(1405).

~The d(K-,n) reaction populates both the isospin states of '''I=0''' and '''I=1'''. All the decay final states of Λ(1405), Σ-π+, Σ+π-, and Σ0π0 are identified in order to decompose the isospin amplitude in the reaction.  


** Collaboration [#dfcfe96a]

-This activity is based on the collaborative research at J-PARC.

** Activity [#z876a7d9]

- [[Beam Line]]
-- 
- [[Spectrometer]]
-- [[Backward Proton Chamber(BPC)>Spectrometer#BPC]]
-- [[Backward Proton Detector(BPD)>Spectrometer#BPD]]


- [[Target]]

** Event [#qf2c0d5d]


** Document [#v9783986]

- [[PAC/Review]]

- [[Conference/Symposium/Workshop]]

- [[Publication]]

- [[Others]]

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