Search for violation of CP invariance in τ± decay

W. T. Ford; P. A. Piroué; R. S. Remmel; A. J.S. Smith; P. A. Souder

doi:10.1103/PhysRevLett.25.1370

Search for violation of CP invariance in τ± decay

W. T. Ford, P. A. Piroué, R. S. Remmel, A. J.S. Smith, P. A. Souder

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

47 Scopus citations

Abstract

We report a comparison of the Dalitz-plot distributions of 1.6 million τ+ decays (K+→π+π+π-) and an equal number of τ- decays. No significant asymmetry has been found in any region of the plot. In terms of the difference in the slope parameters a+ and a- for the odd-pion c.m.-energy spectra, the asymmetry is Δ=(a+-a-)(a++a-)=-0.0070±0.0053. We also present a preliminary result for the slope parameter itself: a=0.283±0.005. New measurements of the τ± decay rates and their difference confirm previous results.

Original language	English (US)
Pages (from-to)	1370-1373
Number of pages	4
Journal	Physical Review Letters
Volume	25
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.25.1370
State	Published - 1970
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1103/PhysRevLett.25.1370

Cite this

@article{fc59430df9604c25abaa5908a5b9225a,

title = "Search for violation of CP invariance in τ± decay",

abstract = "We report a comparison of the Dalitz-plot distributions of 1.6 million τ+ decays (K+→π+π+π-) and an equal number of τ- decays. No significant asymmetry has been found in any region of the plot. In terms of the difference in the slope parameters a+ and a- for the odd-pion c.m.-energy spectra, the asymmetry is Δ=(a+-a-)(a++a-)=-0.0070±0.0053. We also present a preliminary result for the slope parameter itself: a=0.283±0.005. New measurements of the τ± decay rates and their difference confirm previous results.",

author = "Ford, {W. T.} and Pirou{\'e}, {P. A.} and Remmel, {R. S.} and Smith, {A. J.S.} and Souder, {P. A.}",

year = "1970",

doi = "10.1103/PhysRevLett.25.1370",

language = "English (US)",

volume = "25",

pages = "1370--1373",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "19",

}

TY - JOUR

T1 - Search for violation of CP invariance in τ± decay

AU - Ford, W. T.

AU - Piroué, P. A.

AU - Remmel, R. S.

AU - Smith, A. J.S.

AU - Souder, P. A.

PY - 1970

Y1 - 1970

N2 - We report a comparison of the Dalitz-plot distributions of 1.6 million τ+ decays (K+→π+π+π-) and an equal number of τ- decays. No significant asymmetry has been found in any region of the plot. In terms of the difference in the slope parameters a+ and a- for the odd-pion c.m.-energy spectra, the asymmetry is Δ=(a+-a-)(a++a-)=-0.0070±0.0053. We also present a preliminary result for the slope parameter itself: a=0.283±0.005. New measurements of the τ± decay rates and their difference confirm previous results.

AB - We report a comparison of the Dalitz-plot distributions of 1.6 million τ+ decays (K+→π+π+π-) and an equal number of τ- decays. No significant asymmetry has been found in any region of the plot. In terms of the difference in the slope parameters a+ and a- for the odd-pion c.m.-energy spectra, the asymmetry is Δ=(a+-a-)(a++a-)=-0.0070±0.0053. We also present a preliminary result for the slope parameter itself: a=0.283±0.005. New measurements of the τ± decay rates and their difference confirm previous results.

UR - http://www.scopus.com/inward/record.url?scp=4243632480&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243632480&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.25.1370

DO - 10.1103/PhysRevLett.25.1370

M3 - Article

AN - SCOPUS:4243632480

SN - 0031-9007

VL - 25

SP - 1370

EP - 1373

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

ER -

Search for violation of CP invariance in τ± decay

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this