Search for direct CP-violation in K±→π±π0π0 decays

被引：16

作者：

Batley, J. R.

Culling, A. J.

Kalmus, G.

Lazzeroni, C.

Munday, D. J.

Slater, M. W.

Wotton, S. A.

Arcidiacono, R.

Bocquet, G.

Cabibbo, N.

Ceccucci, A.

Cundy, D.

Falaleev, V.

Fidecaro, M.

Gatignon, L.

Gonidec, A.

Kubischta, W.

Norton, A.

Maier, A.

Patel, M.

Peters, A.

Balev, S. ^{[1
]}

Frabetti, P. L.

Goudzovski, E.

Hristov, P.

Kekelidze, V.

Kozhuharov, V.

Litov, L.

Madigozhin, D.

Marinova, E.

Molokanova, N.

Polenkevich, I.

Potrebenikov, Yu.

Stoynev, S.

Zinchenko, A.

Monnier, E.

Swallow, E.

Winston, R.

Rubin, P.

Walker, A.

Baldini, W.

Cotta Ramusino, A.

Dalpiaz, P.

Damiani, C.

Fiorini, M.

Gianoli, A.

Martini, M.

Petrucci, F.

Savrie, M.

Scarpa, M.

机构：

[1] Joint Nucl Res Inst, Dubna, Russia

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[3] CERN, CH-1211 Geneva 23, Switzerland

[4] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60126 USA

[5] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

[6] Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy

[7] Ist Nazl Fis Nucl, I-44100 Ferrara, Italy

[8] Univ Florence, Dipartimento Fis, I-50125 Florence, Italy

[9] Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy

[10] Johannes Gutenberg Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[11] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[12] Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy

[13] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy

[14] Univ Pisa, Scuola Normale Super Pisa, Dipartimento Fis, I-56100 Pisa, Italy

[15] Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy

[16] CEA Saclay, DSM, DAPNIA, F-91191 Gif Sur Yvette, France

[17] Univ Siegen, Fachbereich Phys, D-57068 Siegen, Germany

[18] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy

[19] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[20] Austrian Acad Sci, Inst Hochenergiephys, A-10560 Vienna, Austria

来源：

PHYSICS LETTERS B | 2006年 / 638卷 / 01期

关键词：

D O I：

10.1016/j.physletb.2006.05.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for direct CP-violation in K-+/- -> pi(+/-)pi(0)pi(0) decay based on 47.14 million events has been performed by the NA48/2 experiment at the CERN SPS. The asymmetry in the Dalitz plot linear slopes Ag = (g(+)-g(-))/(g(+)+g(-)) is measured to be A(g) = (1.8 +/- 2.6) x 10(-4). The design of the experiment and the method of analysis provide good control of instrumental charge asymmetries in this measurement. The precision of the result is limited by statistics and is almost one order of magnitude better than that of previous measurements by other experiments. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：22 / 29

页数：8

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