Measurement of the amplitude of the CP conserving decay KS0 → π+π-π0

G. B. Thomson; Y. Zhou; A. Beretvas; A. Caracappa; T. Devlin; H. T. Diehl; K. Krueger; S. S. Myung; S. Teige; N. Grossman; K. Heller; K. Thorne; P. Border; M. J. Longo

doi:10.1016/0370-2693(94)90995-4

Measurement of the amplitude of the CP conserving decay K_S⁰ → π⁺π^-π⁰

G. B. Thomson, Y. Zhou, A. Beretvas, A. Caracappa, T. Devlin, H. T. Diehl, K. Krueger, S. S. Myung, S. Teige, N. Grossman, K. Heller, K. Thorne, P. Border, M. J. Longo

Physics and Astronomy (Twin Cities)

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Abstract

We measured the amplitude for the CP-symmetry-conserving decay K_S⁰ → π⁺π^-π⁰ in an experiment at Fermilab. This decay manifests itself as a time dependent charge asymmetry in the inteference between the coherent K_S and K_L decays. We collected π⁺π^-π⁰ decays between 0.6 and 7.6 K_S Lifetimes from the production target using a detector that consisted of a magnetic spectrometer and a lead glass electromagnetic. K_S⁰ → π⁺π^- decays that were collected simultaneously were used for normalization. The ratio p+-0 of the CP-conserving K_S amplitude to the K_L amplitude is found to be: •p+-0• = 0.035^+0.019_-0.011 (stat.) ±0.004 (syst.), with a phase Ø_p=-59°±48°. This yields a branching ratio of (3.9 ^+5.4-1.8(stat.) ^+0.9_-0.7 (syst.)) × 10^-7.

Original language	English (US)
Pages (from-to)	411-415
Number of pages	5
Journal	Physics Letters B
Volume	337
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(94)90995-4
State	Published - Oct 13 1994

Bibliographical note

Funding Information:
We would like to acknowledge the help of E Cush-man, R. Handler, C. James, U. Joshi, E. Kneedler, O.E. Overseth, A. Pal, M. Sheaff, and M. Shupe in the early stages of the experiment; L. Pondrom for the loan of the MWPC system; and the staffs of the Fermilab Experimental Areas and Computing Departments for assistance at all stages. This work was supported in part by the National Science Foundation and the U. S. Department of Energy.

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@article{50b7acece4c74d3e8cd362261ebb848a,

title = "Measurement of the amplitude of the CP conserving decay KS0 → π+π-π0",

abstract = "We measured the amplitude for the CP-symmetry-conserving decay KS0 → π+π-π0 in an experiment at Fermilab. This decay manifests itself as a time dependent charge asymmetry in the inteference between the coherent KS and KL decays. We collected π+π-π0 decays between 0.6 and 7.6 KS Lifetimes from the production target using a detector that consisted of a magnetic spectrometer and a lead glass electromagnetic. KS0 → π+π- decays that were collected simultaneously were used for normalization. The ratio p+-0 of the CP-conserving KS amplitude to the KL amplitude is found to be: •p+-0• = 0.035+0.019-0.011 (stat.) ±0.004 (syst.), with a phase {\O}p=-59°±48°. This yields a branching ratio of (3.9 +5.4-1.8(stat.) +0.9-0.7 (syst.)) × 10-7.",

author = "Thomson, {G. B.} and Y. Zhou and A. Beretvas and A. Caracappa and T. Devlin and Diehl, {H. T.} and K. Krueger and Myung, {S. S.} and S. Teige and N. Grossman and K. Heller and K. Thorne and P. Border and Longo, {M. J.}",

note = "Funding Information: We would like to acknowledge the help of E Cush-man, R. Handler, C. James, U. Joshi, E. Kneedler, O.E. Overseth, A. Pal, M. Sheaff, and M. Shupe in the early stages of the experiment; L. Pondrom for the loan of the MWPC system; and the staffs of the Fermilab Experimental Areas and Computing Departments for assistance at all stages. This work was supported in part by the National Science Foundation and the U. S. Department of Energy.",

year = "1994",

month = oct,

day = "13",

doi = "10.1016/0370-2693(94)90995-4",

language = "English (US)",

volume = "337",

pages = "411--415",

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TY - JOUR

T1 - Measurement of the amplitude of the CP conserving decay KS0 → π+π-π0

AU - Thomson, G. B.

AU - Zhou, Y.

AU - Beretvas, A.

AU - Caracappa, A.

AU - Devlin, T.

AU - Diehl, H. T.

AU - Krueger, K.

AU - Myung, S. S.

AU - Teige, S.

AU - Grossman, N.

AU - Heller, K.

AU - Thorne, K.

AU - Border, P.

AU - Longo, M. J.

N1 - Funding Information: We would like to acknowledge the help of E Cush-man, R. Handler, C. James, U. Joshi, E. Kneedler, O.E. Overseth, A. Pal, M. Sheaff, and M. Shupe in the early stages of the experiment; L. Pondrom for the loan of the MWPC system; and the staffs of the Fermilab Experimental Areas and Computing Departments for assistance at all stages. This work was supported in part by the National Science Foundation and the U. S. Department of Energy.

PY - 1994/10/13

Y1 - 1994/10/13

N2 - We measured the amplitude for the CP-symmetry-conserving decay KS0 → π+π-π0 in an experiment at Fermilab. This decay manifests itself as a time dependent charge asymmetry in the inteference between the coherent KS and KL decays. We collected π+π-π0 decays between 0.6 and 7.6 KS Lifetimes from the production target using a detector that consisted of a magnetic spectrometer and a lead glass electromagnetic. KS0 → π+π- decays that were collected simultaneously were used for normalization. The ratio p+-0 of the CP-conserving KS amplitude to the KL amplitude is found to be: •p+-0• = 0.035+0.019-0.011 (stat.) ±0.004 (syst.), with a phase Øp=-59°±48°. This yields a branching ratio of (3.9 +5.4-1.8(stat.) +0.9-0.7 (syst.)) × 10-7.

AB - We measured the amplitude for the CP-symmetry-conserving decay KS0 → π+π-π0 in an experiment at Fermilab. This decay manifests itself as a time dependent charge asymmetry in the inteference between the coherent KS and KL decays. We collected π+π-π0 decays between 0.6 and 7.6 KS Lifetimes from the production target using a detector that consisted of a magnetic spectrometer and a lead glass electromagnetic. KS0 → π+π- decays that were collected simultaneously were used for normalization. The ratio p+-0 of the CP-conserving KS amplitude to the KL amplitude is found to be: •p+-0• = 0.035+0.019-0.011 (stat.) ±0.004 (syst.), with a phase Øp=-59°±48°. This yields a branching ratio of (3.9 +5.4-1.8(stat.) +0.9-0.7 (syst.)) × 10-7.

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