Test of time reversal invariance in the decay K+ → π0μ+ν

KEK-E246 Collaboration

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The T violating parameter, ℑ(ξ), of the decay K+ → π0μ+v, has been determined in KEK experiment E246 from a measurement of the transverse μ+ polarization, PT. The experiment is the first to use stopped K+, which allows a null test, formation of a double ratio for PT, and enhances the ratio ℑ(ξ)/PT. The results from the 1996-1997 data are: ℑ(ξ) = -0.013 ± 0.016 ± 0.003 ˜ 3PT. The first error, due to statistics, dominates over the second which is due to systematics. Considerably more data taken in 1998 is under analysis and additional running time has been approved by KEK.

Original languageEnglish
Pages (from-to)919c-922c
JournalNuclear Physics A
Volume663-664
Issue number1-2
DOIs
Publication statusPublished - 2000 Jan 31

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invariance
statistics
decay
polarization

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

KEK-E246 Collaboration. / Test of time reversal invariance in the decay K+ → π0μ+ν. In: Nuclear Physics A. 2000 ; Vol. 663-664, No. 1-2. pp. 919c-922c.
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title = "Test of time reversal invariance in the decay K+ → π0μ+ν",
abstract = "The T violating parameter, ℑ(ξ), of the decay K+ → π0μ+v, has been determined in KEK experiment E246 from a measurement of the transverse μ+ polarization, PT. The experiment is the first to use stopped K+, which allows a null test, formation of a double ratio for PT, and enhances the ratio ℑ(ξ)/PT. The results from the 1996-1997 data are: ℑ(ξ) = -0.013 ± 0.016 ± 0.003 ˜ 3PT. The first error, due to statistics, dominates over the second which is due to systematics. Considerably more data taken in 1998 is under analysis and additional running time has been approved by KEK.",
author = "{KEK-E246 Collaboration} and M. Abe and M. Aoki and I. Arai and Y. Asano and T. Baker and M. Blecher and Chapman, {M. D.} and Dementyev, {D. V.} and P. Depommier and Grigoriev, {M. P.} and P. Gumplinger and M. Hasinoff and R. Henderson and K. Horie and Hou, {W. S.} and Huang, {H. C.} and Y. Igarashi and T. Ikeda and J. Imazato and Ivashkin, {A. P.} and Kang, {Ju Hwan} and W. Keil and Khabibullin, {M. M.} and Khotyantsev, {A. N.} and Kudenko, {Yu G.} and Y. Kuno and Lee, {J. M.} and Lee, {K. S.} and Lim, {G. Y.} and Macdonald, {J. A.} and Marlow, {D. R.} and Mindas, {C. R.} and Mineev, {O. V.} and C. Rangacharyulu and Sahu, {S. K.} and S. Sekikawa and K. Shibata and Shimizu, {H. M.} and S. Shimizu and Shin, {Y. M.} and Shin, {Y. H.} and Sim, {K. S.} and A. Suzuki and T. Tashiro and A. Watanabe and D. Wright and T. Yokoi",
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Test of time reversal invariance in the decay K+ → π0μ+ν. / KEK-E246 Collaboration.

In: Nuclear Physics A, Vol. 663-664, No. 1-2, 31.01.2000, p. 919c-922c.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Test of time reversal invariance in the decay K+ → π0μ+ν

AU - KEK-E246 Collaboration

AU - Abe, M.

AU - Aoki, M.

AU - Arai, I.

AU - Asano, Y.

AU - Baker, T.

AU - Blecher, M.

AU - Chapman, M. D.

AU - Dementyev, D. V.

AU - Depommier, P.

AU - Grigoriev, M. P.

AU - Gumplinger, P.

AU - Hasinoff, M.

AU - Henderson, R.

AU - Horie, K.

AU - Hou, W. S.

AU - Huang, H. C.

AU - Igarashi, Y.

AU - Ikeda, T.

AU - Imazato, J.

AU - Ivashkin, A. P.

AU - Kang, Ju Hwan

AU - Keil, W.

AU - Khabibullin, M. M.

AU - Khotyantsev, A. N.

AU - Kudenko, Yu G.

AU - Kuno, Y.

AU - Lee, J. M.

AU - Lee, K. S.

AU - Lim, G. Y.

AU - Macdonald, J. A.

AU - Marlow, D. R.

AU - Mindas, C. R.

AU - Mineev, O. V.

AU - Rangacharyulu, C.

AU - Sahu, S. K.

AU - Sekikawa, S.

AU - Shibata, K.

AU - Shimizu, H. M.

AU - Shimizu, S.

AU - Shin, Y. M.

AU - Shin, Y. H.

AU - Sim, K. S.

AU - Suzuki, A.

AU - Tashiro, T.

AU - Watanabe, A.

AU - Wright, D.

AU - Yokoi, T.

PY - 2000/1/31

Y1 - 2000/1/31

N2 - The T violating parameter, ℑ(ξ), of the decay K+ → π0μ+v, has been determined in KEK experiment E246 from a measurement of the transverse μ+ polarization, PT. The experiment is the first to use stopped K+, which allows a null test, formation of a double ratio for PT, and enhances the ratio ℑ(ξ)/PT. The results from the 1996-1997 data are: ℑ(ξ) = -0.013 ± 0.016 ± 0.003 ˜ 3PT. The first error, due to statistics, dominates over the second which is due to systematics. Considerably more data taken in 1998 is under analysis and additional running time has been approved by KEK.

AB - The T violating parameter, ℑ(ξ), of the decay K+ → π0μ+v, has been determined in KEK experiment E246 from a measurement of the transverse μ+ polarization, PT. The experiment is the first to use stopped K+, which allows a null test, formation of a double ratio for PT, and enhances the ratio ℑ(ξ)/PT. The results from the 1996-1997 data are: ℑ(ξ) = -0.013 ± 0.016 ± 0.003 ˜ 3PT. The first error, due to statistics, dominates over the second which is due to systematics. Considerably more data taken in 1998 is under analysis and additional running time has been approved by KEK.

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DO - 10.1016/S0375-9474(99)00797-6

M3 - Article

VL - 663-664

SP - 919c-922c

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

IS - 1-2

ER -