Mesonic weak decay of Λ4H and Λ4He

H. Outa; M. Aoki; R. S. Hayano; T. Ishikawa; M. Iwasaki; A. Sakaguchi; E. Takada; H. Tamura; T. Yamazaki

doi:10.1016/0375-9474(94)00552-X

Mesonic weak decay of _Λ⁴H and _Λ⁴He

H. Outa, M. Aoki, R. S. Hayano, T. Ishikawa, M. Iwasaki, A. Sakaguchi, E. Takada, H. Tamura, T. Yamazaki

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

New observables on the mesonic decay of light Λ hypernuclei with A=4 (_Λ⁴H and _Λ⁴He) are directly measured by using ⁴He (K_stopped^-,π^-) reaction: 1) The lifetime of _Λ⁴H is measured as 194_-26⁺²⁴ ps, 2) The π° decay branching ratio of _Λ⁴He is determined as 51.5±3.5%. Incorporating the results of bubble chamber experiments, partial mesonic decay widths of _Λ⁴H and _Λ⁴He are derived and they are compared with recent theoretical estimates. Our results favors ΛN interaction with inner repulsive core.

Original language	English
Pages (from-to)	109-112
Number of pages	4
Journal	Nuclear Physics, Section A
Volume	585
Issue number	1-2
DOIs	https://doi.org/10.1016/0375-9474(94)00552-X
Publication status	Published - 1995 Mar 13
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0375-9474(94)00552-X

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title = "Mesonic weak decay of Λ4H and Λ4He",

abstract = "New observables on the mesonic decay of light Λ hypernuclei with A=4 (Λ4H and Λ4He) are directly measured by using 4He (Kstopped-,π-) reaction: 1) The lifetime of Λ4H is measured as 194-26+24 ps, 2) The π° decay branching ratio of Λ4He is determined as 51.5±3.5%. Incorporating the results of bubble chamber experiments, partial mesonic decay widths of Λ4H and Λ4He are derived and they are compared with recent theoretical estimates. Our results favors ΛN interaction with inner repulsive core.",

author = "H. Outa and M. Aoki and Hayano, {R. S.} and T. Ishikawa and M. Iwasaki and A. Sakaguchi and E. Takada and H. Tamura and T. Yamazaki",

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doi = "10.1016/0375-9474(94)00552-X",

language = "English",

volume = "585",

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journal = "Nuclear Physics A",

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TY - JOUR

T1 - Mesonic weak decay of Λ4H and Λ4He

AU - Outa, H.

AU - Aoki, M.

AU - Hayano, R. S.

AU - Ishikawa, T.

AU - Iwasaki, M.

AU - Sakaguchi, A.

AU - Takada, E.

AU - Tamura, H.

AU - Yamazaki, T.

PY - 1995/3/13

Y1 - 1995/3/13

N2 - New observables on the mesonic decay of light Λ hypernuclei with A=4 (Λ4H and Λ4He) are directly measured by using 4He (Kstopped-,π-) reaction: 1) The lifetime of Λ4H is measured as 194-26+24 ps, 2) The π° decay branching ratio of Λ4He is determined as 51.5±3.5%. Incorporating the results of bubble chamber experiments, partial mesonic decay widths of Λ4H and Λ4He are derived and they are compared with recent theoretical estimates. Our results favors ΛN interaction with inner repulsive core.

AB - New observables on the mesonic decay of light Λ hypernuclei with A=4 (Λ4H and Λ4He) are directly measured by using 4He (Kstopped-,π-) reaction: 1) The lifetime of Λ4H is measured as 194-26+24 ps, 2) The π° decay branching ratio of Λ4He is determined as 51.5±3.5%. Incorporating the results of bubble chamber experiments, partial mesonic decay widths of Λ4H and Λ4He are derived and they are compared with recent theoretical estimates. Our results favors ΛN interaction with inner repulsive core.

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DO - 10.1016/0375-9474(94)00552-X

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VL - 585

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EP - 112

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-2

ER -

Mesonic weak decay of _Λ⁴H and _Λ⁴He

Abstract

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