Search for direct CP violating charge asymmetries in K±→π±π+π- and K±→π±π0π0 decays

被引：0
|
作者：
J.R. Batley
A.J. Culling
G. Kalmus
C. Lazzeroni
D.J. Munday
M.W. Slater
S.A. Wotton
R. Arcidiacono
G. Bocquet
N. Cabibbo
A. Ceccucci
D. Cundy
V. Falaleev
M. Fidecaro
L. Gatignon
A. Gonidec
W. Kubischta
A. Norton
A. Maier
M. Patel
A. Peters
S. Balev
P.L. Frabetti
E. Goudzovski
P. Hristov
V. Kekelidze
V. Kozhuharov
L. Litov
D. Madigozhin
E. Marinova
N. Molokanova
I. Polenkevich
Y. Potrebenikov
S. Stoynev
A. Zinchenko
E. Monnier
E. Swallow
R. Winston
P. Rubin
A. Walker
W. Baldini
A. Cotta Ramusino
P. Dalpiaz
C. Damiani
M. Fiorini
A. Gianoli
M. Martini
F. Petrucci
M. Savrié
M. Scarpa
机构：
[1] University of Cambridge,Cavendish Laboratory
[2] CERN,The Enrico Fermi Institute
[3] Joint Institute for Nuclear Research,Department of Physics and Astronomy
[4] The University of Chicago,Institut für Physik
[5] University of Edinburgh,Department of Physics and Astronomy
[6] JCMB King’s Buildings,Dipartimento di Fisica dell’Università
[7] Dipartimento di Fisica dell’Università e Sezione dell’INFN di Ferrara,Fachbereich Physik
[8] Dipartimento di Fisica dell’Università e Sezione dell’INFN di Firenze,Institut für Hochenergiephysik
[9] Universität Mainz,Centre de Physique des Particules de Marseille, IN2P3
[10] Northwestern University,CNRS
[11] Dipartimento di Fisica dell’Università e Sezione dell’INFN di Perugia,Istituto di Fisica
[12] Scuola Normale Superiore e Sezione dell’INFN di Pisa,Istituto di Fisica
[13] DSM/DAPNIA – CEA Saclay,Physikalisches Institut
[14] Universität Siegen,undefined
[15] Dipartimento di Fisica Sperimentale dell’Università e Sezione dell’INFN di Torino,undefined
[16] Österreichische Akademie der Wissenschaften,undefined
[17] Istituto di Cosmogeofisica del CNR di Torino,undefined
[18] Scuola Normale Superiore and INFN,undefined
[19] CERN,undefined
[20] Université de la Méditerranée,undefined
[21] Università di Modena,undefined
[22] Università di Urbino,undefined
[23] Universität Bonn,undefined
[24] SLAC,undefined
[25] Stanford University,undefined
[26] UCLA,undefined
来源：
The European Physical Journal C | 2007年 / 52卷
关键词：
Monte Carlo; Invariant Mass; Systematic Uncertainty; Charge Asymmetry; Dalitz Plot;
D O I：
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中图分类号：
学科分类号：
摘要：
A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag=(g+-g-)/(g++g-) in K±→π±π+π- and K±→π±π0π0 decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous K+ and K- beams and a large data sample collected allowed a result of an unprecedented precision. The charge asymmetries were measured to be Acg=(-1.5±2.2)×10-4 with 3.11×109K±→π±π+π- decays, and Ang=(1.8±1.8)×10-4 with 9.13×107K±→π±π0π0 decays. The precision of the results is limited mainly by the size of the data sample.
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页码：875 / 891
页数：16
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