Measurement of the branching ratio and form factors for the decay KL→π±π0e∓νe((ν)over-bare)

被引：7

作者：

Batley, JR ^{[1
]}

Dosanjh, RS

Gershon, TJ

Kalmus, GE

Lazzeroni, C

Munday, D

Olaiya, E

Patel, M

Parker, MA

White, TO

Wotton, SA

Arcidiacono, R

Bocquet, G

Ceccucci, A

Cuhadar-Dönszelmann, T

Cundy, D

Doble, N

Falaleev, V

Gatignon, L

Gonidec, A

Gorini, B

Grafström, P

Kubischta, W

Mikulec, I

Norton, A

Palestini, S

Wahl, H

Cheshkov, C

Hristov, P

Kekelidze, V

Litov, L

Madigozhin, D

Molokanova, N

Potrebenikov, Y

Zinchenko, A

Rubin, P

Sacco, R

Walker, A

Bettoni, D

Calabrese, R

Dalpiaz, P

Duclos, J

Frabetti, PL

Gianoli, A

Martini, M

Masetti, L

Petrucci, E

Savrié, M

Scarpa, M

Bizzeti, A

机构：

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

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

[3] Joint Inst Nucl Res, Dubna 141980, Russia

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

[5] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

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

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

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

[9] Univ Mainz, Inst Phys, D-55099 Mainz, Germany

[10] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France

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

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

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

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

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

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

[17] Soltan Inst Nucl Studies, High Energy Phys Lab, PL-00681 Warsaw, Poland

[18] Austrian Acad Sci, Inst Hochenergiephys, A-1050 Vienna, Austria

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

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

[21] Univ Pisa, Dipartimento Fis, I-56100 Pisa, Italy

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

[23] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA

来源：

PHYSICS LETTERS B | 2004年 / 595卷

关键词：

D O I：

10.1016/j.physletb.2004.05.026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The K-L --> pi(+/-)pi(0)e(-/+)v(e) ((v) over bar (e)) decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio Br(K-L --> pi(+/-)pi(0)e(-/+)v(e)((v) over bar (e)) = (5.21 +/- 0.07(stat) +/-0.09(syst)) x 10(-5) was fixed from a sample of 5464 events with 62 background events. The form factors (f) over bar (s), (f) over bar (p), lambda(g) and (h) over bar were found to be in agreement with previous measurements but with higher accuracy. The coupling parameter of the chiral Lagrangian L-3 = (-4.1 +/- 0.2) x 10(-3) was evaluated from the data. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：75 / 85

页数：11

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