Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei

H. Bhang; S. Ajimura; K. Aoki; A. Banu; T. Fukuda; O. Hashimoto; J. I. Hwang; S. Kameoka; B. H. Kang; E. Kim; J. H. Kim; M. Kim; T. Maruta; Y. Miura; Y. Miyake; T. Nagae; M. Nakamura; S. N. Nakamura; H. Noumi; S. Okada; Y. Okayasu; H. Outa; H. Park; P. K. Saha; Y. Sato; M. Sekimoto; T. Takahashi; H. Tamura; K. Tanida; A. Toyoda; K. Tshoo; K. Tsukada; T. Watanabe; H. J. Yim

doi:10.1007/s00601-012-0370-x

Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei

H. Bhang
, S. Ajimura
, K. Aoki
, A. Banu
, T. Fukuda
, O. Hashimoto
, J. I. Hwang
, S. Kameoka
, B. H. Kang
, E. Kim
, J. H. Kim
, M. Kim
, T. Maruta
, Y. Miura
, Y. Miyake
, T. Nagae
, M. Nakamura
, S. N. Nakamura
, H. Noumi
, S. Okada

Y. Okayasu, H. Outa, H. Park, P. K. Saha, Y. Sato, M. Sekimoto, T. Takahashi, H. Tamura, K. Tanida, A. Toyoda, K. Tshoo, K. Tsukada, T. Watanabe, H. J. Yim

School of Earth System Sciences

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

Abstract

The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon-baryon weak interaction in SU3_f group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γ_n/Γ_p value converging to ~0.5. The large experimental values of Γ_n/Γ_p of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented.

Original language	English
Pages (from-to)	103-110
Number of pages	8
Journal	Few-Body Systems
Volume	54
Issue number	1-4
DOIs	https://doi.org/10.1007/s00601-012-0370-x
State	Published - Mar 2013

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Bhang, H., Ajimura, S., Aoki, K., Banu, A., Fukuda, T., Hashimoto, O., Hwang, J. I., Kameoka, S., Kang, B. H., Kim, E., Kim, J. H., Kim, M., Maruta, T., Miura, Y., Miyake, Y., Nagae, T., Nakamura, M., Nakamura, S. N., Noumi, H., ... Yim, H. J. (2013). Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei. Few-Body Systems, 54(1-4), 103-110. https://doi.org/10.1007/s00601-012-0370-x

@article{38c662ef39bc4bc8b9b60b0ee9629ab1,

title = "Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei",

abstract = "The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon-baryon weak interaction in SU3f group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γn/Γp value converging to \textasciitilde{}0.5. The large experimental values of Γn/Γp of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented.",

author = "H. Bhang and S. Ajimura and K. Aoki and A. Banu and T. Fukuda and O. Hashimoto and Hwang, \{J. I.\} and S. Kameoka and Kang, \{B. H.\} and E. Kim and Kim, \{J. H.\} and M. Kim and T. Maruta and Y. Miura and Y. Miyake and T. Nagae and M. Nakamura and Nakamura, \{S. N.\} and H. Noumi and S. Okada and Y. Okayasu and H. Outa and H. Park and Saha, \{P. K.\} and Y. Sato and M. Sekimoto and T. Takahashi and H. Tamura and K. Tanida and A. Toyoda and K. Tshoo and K. Tsukada and T. Watanabe and Yim, \{H. J.\}",

year = "2013",

month = mar,

doi = "10.1007/s00601-012-0370-x",

language = "English",

volume = "54",

pages = "103--110",

journal = "Few-Body Systems",

issn = "0177-7963",

publisher = "Springer-Verlag Wien",

number = "1-4",

}

Bhang, H, Ajimura, S, Aoki, K, Banu, A, Fukuda, T, Hashimoto, O, Hwang, JI, Kameoka, S, Kang, BH, Kim, E, Kim, JH, Kim, M, Maruta, T, Miura, Y, Miyake, Y, Nagae, T, Nakamura, M, Nakamura, SN, Noumi, H, Okada, S, Okayasu, Y, Outa, H, Park, H, Saha, PK, Sato, Y, Sekimoto, M, Takahashi, T, Tamura, H, Tanida, K, Toyoda, A, Tshoo, K, Tsukada, K, Watanabe, T & Yim, HJ 2013, 'Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei', Few-Body Systems, vol. 54, no. 1-4, pp. 103-110. https://doi.org/10.1007/s00601-012-0370-x

TY - JOUR

T1 - Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei

AU - Bhang, H.

AU - Ajimura, S.

AU - Aoki, K.

AU - Banu, A.

AU - Fukuda, T.

AU - Hashimoto, O.

AU - Hwang, J. I.

AU - Kameoka, S.

AU - Kang, B. H.

AU - Kim, E.

AU - Kim, J. H.

AU - Kim, M.

AU - Maruta, T.

AU - Miura, Y.

AU - Miyake, Y.

AU - Nagae, T.

AU - Nakamura, M.

AU - Nakamura, S. N.

AU - Noumi, H.

AU - Okada, S.

AU - Okayasu, Y.

AU - Outa, H.

AU - Park, H.

AU - Saha, P. K.

AU - Sato, Y.

AU - Sekimoto, M.

AU - Takahashi, T.

AU - Tamura, H.

AU - Tanida, K.

AU - Toyoda, A.

AU - Tshoo, K.

AU - Tsukada, K.

AU - Watanabe, T.

AU - Yim, H. J.

PY - 2013/3

Y1 - 2013/3

N2 - The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon-baryon weak interaction in SU3f group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γn/Γp value converging to ~0.5. The large experimental values of Γn/Γp of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented.

AB - The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon-baryon weak interaction in SU3f group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γn/Γp value converging to ~0.5. The large experimental values of Γn/Γp of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented.

UR - https://www.scopus.com/pages/publications/84873060677

U2 - 10.1007/s00601-012-0370-x

DO - 10.1007/s00601-012-0370-x

M3 - Article

AN - SCOPUS:84873060677

SN - 0177-7963

VL - 54

SP - 103

EP - 110

JO - Few-Body Systems

JF - Few-Body Systems

IS - 1-4

ER -

Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei

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