First measurement of the π+π- atom lifetime

被引：98

作者：

Adeva, B ^{[1
]}

Afanasyev, L

Benayoun, M

Benelli, A

Berka, Z

Brekhovskikh, V

Caragheorgheopol, G

Cechak, T

Chiba, M

Constantinescu, S

Detraz, C

Dreossi, D

Drijard, D

Dudarev, A

Evangelou, I

Ferro-Luzzi, M

Gallas, MV

Gerndt, J

Giacomich, R

Gianotti, P

Goldin, D

Gómez, F

Gorin, A

Gorchakov, O

Guaraldo, C

Hansroul, M

Hosek, R

Iliescu, M

Karpukhin, V

Kluson, J

Kobayashi, M

Kokkas, P

Komarov, V

Kruglov, V

Kruglova, L

Kulikov, A

Kuptsov, A

Kurochkin, I

Kuroda, KI

Lamberto, A

Lanaro, A

Lapshin, V

Lednicky, R

Leruste, P

Sandri, PL

Aguera, AL

Lucherini, V

Maki, T

Manthos, N

Manuilov, I

机构：

[1] CERN, Geneva, Switzerland

[2] Czech Tech Univ, CR-16635 Prague, Czech Republic

[3] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic

[4] Univ Ioannina, GR-45110 Ioannina, Greece

[5] Univ Paris 06, LPNHE, CNRS, IN2P3, F-75252 Paris, France

[6] Univ Paris 07, LPNHE, CNRS, IN2P3, F-75252 Paris, France

[7] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[8] Ist Nazl Fis Nucl, Trieste, Italy

[9] Univ Trieste, Trieste, Italy

[10] KEK, Tsukuba, Ibaraki 305, Japan

[11] Kyoto Sangyo Univ, Kyoto 603, Japan

[12] UOEH, Kyushu, Japan

[13] Tokyo Metropolitan Univ, Tokyo, Japan

[14] JINR, Dubna, Russia

[15] Natl Inst Phys & Nucl Engn, IFIN HH, Bucharest, Romania

[16] Moscow MV Lomonosov State Univ, Skobeltsin Inst Nucl Phys, Moscow, Russia

[17] IHEP, Protvino, Russia

[18] Univ Santiago Compostela, Santiago De Compostela, Spain

[19] Univ Basel, CH-4003 Basel, Switzerland

[20] Univ Bern, CH-3012 Bern, Switzerland

来源：

PHYSICS LETTERS B | 2005年 / 619卷 / 1-2期

基金：

日本学术振兴会; 俄罗斯基础研究基金会;

关键词：

DIRAC experiment; elementary atom; pionium atom; pion scattering;

D O I：

10.1016/j.physletb.2005.05.045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The goal of the DIRAC experiment at CERN (PS212) is to measure the pi(+)pi(-) atom lifetime with 10% precision. Such a measurement would yield a precision of 5% on the value of the S-wave pi pi scattering lengths combination vertical bar a(0)-a(2)vertical bar. Based on part of the collected data we present a first result on the lifetime, tau = [2.91(-0.62)(+0.49)] x 10(-15) s, and discuss the major systematic errors. This lifetime corresponds to vertical bar a(0)-a(2)vertical bar = 0.264(-0.020)(+0.033) m(pi)(-1). (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：50 / 60

页数：11

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