T. Koike

Observation of Spin-Dependent Charge Symmetry Breaking in

The energy spacing between the spin-doublet bound state of _{Λ}^{4}He(1^{+},0^{+}) was determined to be 1406±2±2  keV, by measuring γ rays for the 1^{+}→0^{+} transition with a high efficiency germanium detector array in coincidence with the ^{4}He(K^{-},π^{-})_{Λ}^{4}He reaction at J-PARC. In comparison to the corresponding energy spacing in the mirror hypernucleus _{Λ}^{4}H, the present result clearly indicates the existence of charge symmetry breaking (CSB) in ΛN interaction. By combining the energy spacings with the known ground-state binding energies, it is also found that the CSB effect is large in the 0^{+} ground state but is vanishingly small in the 1^{+} excited state, demonstrating that the ΛN CSB interaction has spin dependence.

\Lambda N

We have observed a “

Interaction: Gamma-Ray Spectroscopy of

K^{-}pp

^4_{\Lambda }

”-like structure in the

He

d(\pi ^{+ },K^{+ })

Observation of the “K− pp”-like structure in the d(π+, K+) reaction at 1.69 GeV/c

reaction at 1.69 GeV

Shape of {Lambda} hypernuclei in the ({beta},{gamma}) deformation plane

/c

Search for the Θ+ pentaquark via the π(-)p→K(-)X reaction at 1.92 GeV/c.

. In this reaction, a

Inclusive spectrum of the d(π+, K+) reaction at 1.69 GeV/c

\Lambda (1405)

Search for the Θ+ via the K+p→π+X reaction with a 1.2 GeV/c K+ beam

hyperon resonance is expected to be produced as a doorway to form