Author/Authors :
O. Hashimoto and H. Tamura، نويسنده , , K. Hosomi، نويسنده , , S. Bufalino، نويسنده , , N. Chiga، نويسنده , , P. Evtoukhovitch، نويسنده , , A. Feliciello، نويسنده , , Jennifer R. Honda، نويسنده , , T. Koike، نويسنده , , Y. Ma، نويسنده , , K. Miwa، نويسنده , , A. Sasaki، نويسنده , , Y. Sasaki، نويسنده , , K. Shirotori، نويسنده , , K. Tanida، نويسنده , , Z. Tsamalaidze، نويسنده , , M. Ukai، نويسنده , , T.O. Yamamoto، نويسنده , , S.B. Yang، نويسنده ,
Abstract :
Recent results and future directions of the γ-ray spectroscopy of Λ hypernuclei are discussed. A further analysis of the last KEK experiment (E566) has revealed a new γ transition in 12ΛC at image (preliminary), which is ascribed to the image transition. At J-PARC, studies will be extended from p-shell to s-shell and sd-shell hypernuclei. In the first part of the J-PARC E13 experiment, we will measure the 4ΛHe(image) transition to study charge-symmetry breaking in the ΛN interaction and investigate the 19ΛF hypernucleus to study ΛN spin–spin interaction further using one of the sd-shell hypernuclei. In the second part of E13, we will precisely measure the spin-flip image value for the 7ΛLi(image) transition. Beyond E13, we plan to study impurity effects by observing possible changes in nuclear deformation caused by the presence of a Λ in sd-shell hypernuclei, as well as to investigate various heavier Λ hypernuclei in order to precisely determine the energies of Λ single-particle orbits.
Keywords :
?-Ray spectroscopy , J-PARC , Impurity effect , ?N interaction , ? hypernuclei
