Measurement of ε′ε in the neutral kaon system

R. H. Bernstein; G. J. Bock; D. Carlsmith; D. Coupal; J. W. Cronin; G. D. Gollin; Wen Keling; K. Nishikawa; H. W.M. Norton; B. Winstein; B. Peyaud; R. Turlay; A. Zylberstejn

doi:10.1103/PhysRevLett.54.1631

Measurement of ε′ε in the neutral kaon system

R. H. Bernstein, G. J. Bock, D. Carlsmith, D. Coupal, J. W. Cronin, G. D. Gollin, Wen Keling, K. Nishikawa, H. W.M. Norton, B. Winstein, B. Peyaud, R. Turlay, A. Zylberstejn

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Abstract

A measurement of the ratio of the CP-nonconservation parameters, ε′ε, in the K0K̄0 system was performed through a study of two-pion decays with and without a regenerator. To reduce systematic effects, KL and KS decays were recorded simultaneously with a double beam. Over 3100 KL→2π0 events were reconstructed leading to the result ε′ε=-0.0046±0.0053±0.0024 (the first error is statistical, the second systematic). The measurement agrees with previous less precise determinations but, because of theoretical uncertainties, is not able to test decisively the Kobayashi-Maskawa mechanism.

Original language	English (US)
Pages (from-to)	1631-1634
Number of pages	4
Journal	Physical review letters
Volume	54
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.54.1631
State	Published - 1985
Externally published	Yes

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General Physics and Astronomy

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title = "Measurement of ε′ε in the neutral kaon system",

abstract = "A measurement of the ratio of the CP-nonconservation parameters, ε′ε, in the K0{\=K}0 system was performed through a study of two-pion decays with and without a regenerator. To reduce systematic effects, KL and KS decays were recorded simultaneously with a double beam. Over 3100 KL→2π0 events were reconstructed leading to the result ε′ε=-0.0046±0.0053±0.0024 (the first error is statistical, the second systematic). The measurement agrees with previous less precise determinations but, because of theoretical uncertainties, is not able to test decisively the Kobayashi-Maskawa mechanism.",

author = "Bernstein, {R. H.} and Bock, {G. J.} and D. Carlsmith and D. Coupal and Cronin, {J. W.} and Gollin, {G. D.} and Wen Keling and K. Nishikawa and Norton, {H. W.M.} and B. Winstein and B. Peyaud and R. Turlay and A. Zylberstejn",

year = "1985",

doi = "10.1103/PhysRevLett.54.1631",

language = "English (US)",

volume = "54",

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journal = "Physical review letters",

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T1 - Measurement of ε′ε in the neutral kaon system

AU - Bernstein, R. H.

AU - Bock, G. J.

AU - Carlsmith, D.

AU - Coupal, D.

AU - Cronin, J. W.

AU - Gollin, G. D.

AU - Keling, Wen

AU - Nishikawa, K.

AU - Norton, H. W.M.

AU - Winstein, B.

AU - Peyaud, B.

AU - Turlay, R.

AU - Zylberstejn, A.

PY - 1985

Y1 - 1985

N2 - A measurement of the ratio of the CP-nonconservation parameters, ε′ε, in the K0K̄0 system was performed through a study of two-pion decays with and without a regenerator. To reduce systematic effects, KL and KS decays were recorded simultaneously with a double beam. Over 3100 KL→2π0 events were reconstructed leading to the result ε′ε=-0.0046±0.0053±0.0024 (the first error is statistical, the second systematic). The measurement agrees with previous less precise determinations but, because of theoretical uncertainties, is not able to test decisively the Kobayashi-Maskawa mechanism.

AB - A measurement of the ratio of the CP-nonconservation parameters, ε′ε, in the K0K̄0 system was performed through a study of two-pion decays with and without a regenerator. To reduce systematic effects, KL and KS decays were recorded simultaneously with a double beam. Over 3100 KL→2π0 events were reconstructed leading to the result ε′ε=-0.0046±0.0053±0.0024 (the first error is statistical, the second systematic). The measurement agrees with previous less precise determinations but, because of theoretical uncertainties, is not able to test decisively the Kobayashi-Maskawa mechanism.

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JF - Physical review letters

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Measurement of ε′ε in the neutral kaon system

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