Search for the G-parity violation of weak nucleon current in β decays of mass 8 system

T. Sumikama; K. Matsuta; T. Nagatomo; M. Ogura; T. Iwakoshi; Y. Nakashima; H. Fujiwara; M. Fukuda; M. Mihara; K. Minamisono; T. Yamaguchi; T. Minamisono

doi:10.1063/1.2750769

Search for the G-parity violation of weak nucleon current in β decays of mass 8 system

T. Sumikama, K. Matsuta, T. Nagatomo, M. Ogura, T. Iwakoshi, Y. Nakashima, H. Fujiwara, M. Fukuda, M. Mihara, K. Minamisono, T. Yamaguchi, T. Minamisono

SCI - Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

The β-ray angular distribution from the mirror pair ⁸Li and ⁸B have been observed to search for the G-parity violating induced tensor term g_II in the weak nucleon current The pure nuclear spin alignment of ⁸Li and ⁸B (I^π = 2⁺) was successfully converted from the nuclear spin polarization by applying a β-NMR technique. The alignment correlation term in the β-ray angular distribution was observed as a function of β-ray energy. The g_II was extracted from the alignment correlation term by combining the known β-α correlation term and weak magnetism to be g_II/g _A = -0.28 ± 0.28(stat.)±0.15(syst.) at a 1σ (68%) level.

Original language	English
Title of host publication	Proceedings of the 17th International Spin Physics Symposium
Pages	230-233
Number of pages	4
DOIs	https://doi.org/10.1063/1.2750769
Publication status	Published - 2007
Event	17th International Spin Physics Symposium - Kyoto, Japan Duration: 2006 Oct 2 → 2006 Oct 7

Publication series

Name	AIP Conference Proceedings
Volume	915
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	17th International Spin Physics Symposium
Country	Japan
City	Kyoto
Period	06/10/2 → 06/10/7

Keywords

Alignment correlation term
G parity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2750769

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Sumikama, T., Matsuta, K., Nagatomo, T., Ogura, M., Iwakoshi, T., Nakashima, Y., Fujiwara, H., Fukuda, M., Mihara, M., Minamisono, K., Yamaguchi, T., & Minamisono, T. (2007). Search for the G-parity violation of weak nucleon current in β decays of mass 8 system. In Proceedings of the 17th International Spin Physics Symposium (pp. 230-233). (AIP Conference Proceedings; Vol. 915). https://doi.org/10.1063/1.2750769

Search for the G-parity violation of weak nucleon current in β decays of mass 8 system. / Sumikama, T.; Matsuta, K.; Nagatomo, T.; Ogura, M.; Iwakoshi, T.; Nakashima, Y.; Fujiwara, H.; Fukuda, M.; Mihara, M.; Minamisono, K.; Yamaguchi, T.; Minamisono, T.

Proceedings of the 17th International Spin Physics Symposium. 2007. p. 230-233 (AIP Conference Proceedings; Vol. 915).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Sumikama, T, Matsuta, K, Nagatomo, T, Ogura, M, Iwakoshi, T, Nakashima, Y, Fujiwara, H, Fukuda, M, Mihara, M, Minamisono, K, Yamaguchi, T & Minamisono, T 2007, Search for the G-parity violation of weak nucleon current in β decays of mass 8 system. in Proceedings of the 17th International Spin Physics Symposium. AIP Conference Proceedings, vol. 915, pp. 230-233, 17th International Spin Physics Symposium, Kyoto, Japan, 06/10/2. https://doi.org/10.1063/1.2750769

Sumikama, T. ; Matsuta, K. ; Nagatomo, T. ; Ogura, M. ; Iwakoshi, T. ; Nakashima, Y. ; Fujiwara, H. ; Fukuda, M. ; Mihara, M. ; Minamisono, K. ; Yamaguchi, T. ; Minamisono, T. / Search for the G-parity violation of weak nucleon current in β decays of mass 8 system. Proceedings of the 17th International Spin Physics Symposium. 2007. pp. 230-233 (AIP Conference Proceedings).

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title = "Search for the G-parity violation of weak nucleon current in β decays of mass 8 system",

abstract = "The β-ray angular distribution from the mirror pair 8Li and 8B have been observed to search for the G-parity violating induced tensor term gII in the weak nucleon current The pure nuclear spin alignment of 8Li and 8B (Iπ = 2+) was successfully converted from the nuclear spin polarization by applying a β-NMR technique. The alignment correlation term in the β-ray angular distribution was observed as a function of β-ray energy. The gII was extracted from the alignment correlation term by combining the known β-α correlation term and weak magnetism to be gII/g A = -0.28 ± 0.28(stat.)±0.15(syst.) at a 1σ (68%) level.",

keywords = "Alignment correlation term, G parity",

author = "T. Sumikama and K. Matsuta and T. Nagatomo and M. Ogura and T. Iwakoshi and Y. Nakashima and H. Fujiwara and M. Fukuda and M. Mihara and K. Minamisono and T. Yamaguchi and T. Minamisono",

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AU - Nagatomo, T.

AU - Ogura, M.

AU - Iwakoshi, T.

AU - Nakashima, Y.

AU - Fujiwara, H.

AU - Fukuda, M.

AU - Mihara, M.

AU - Minamisono, K.

AU - Yamaguchi, T.

AU - Minamisono, T.

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N2 - The β-ray angular distribution from the mirror pair 8Li and 8B have been observed to search for the G-parity violating induced tensor term gII in the weak nucleon current The pure nuclear spin alignment of 8Li and 8B (Iπ = 2+) was successfully converted from the nuclear spin polarization by applying a β-NMR technique. The alignment correlation term in the β-ray angular distribution was observed as a function of β-ray energy. The gII was extracted from the alignment correlation term by combining the known β-α correlation term and weak magnetism to be gII/g A = -0.28 ± 0.28(stat.)±0.15(syst.) at a 1σ (68%) level.

AB - The β-ray angular distribution from the mirror pair 8Li and 8B have been observed to search for the G-parity violating induced tensor term gII in the weak nucleon current The pure nuclear spin alignment of 8Li and 8B (Iπ = 2+) was successfully converted from the nuclear spin polarization by applying a β-NMR technique. The alignment correlation term in the β-ray angular distribution was observed as a function of β-ray energy. The gII was extracted from the alignment correlation term by combining the known β-α correlation term and weak magnetism to be gII/g A = -0.28 ± 0.28(stat.)±0.15(syst.) at a 1σ (68%) level.

KW - Alignment correlation term

KW - G parity

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