Determination of <ce:italic>ππ</ce:italic> scattering lengths from measurement of <mml:math xmlns:mml='http://www.w3.org/1998/Math/MathML' altimg='si1.gif' display='inline' overflow='scroll'> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>?</mml:mo> </mml:msup> </mml:math> atom lifetime

B. Adeva; L. Afanasyev; M. Benayoun; A. Benelli; Z. Berka; V. Brekhovskikh; G. Caragheorgheopol; T. Cechak; M. Chiba; P.V. Chliapnikov; C. Ciocarlan; S. Constantinescu; S. Costantini; C. Curceanu (Petrascu); P. Doskarova; D. Dreossi; D. Drijard; A. Dudarev; M. Ferro-Luzzi; J.L. Fungueiri?o Pazos; M. Gallas Torreira; J. Gerndt; P. Gianotti; D. Goldin; F. Gomez; A. Gorin; O. Gorchakov; C. Guaraldo; M. Gugiu; M. Hansroul; Z. Hons; R. Hosek; M. Iliescu; V. Karpukhin; J. Kluson; M. Kobayashi; P. Kokkas; V. Komarov; V. Kruglov; L. Kruglova; A. Kulikov; A. Kuptsov; K.I. Kuroda; A. Lamberto; A. Lanaro; V. Lapshin; R. Lednicky; P. Leruste; P. Levi Sandri; A. Lopez Aguera; V. Lucherini; T. Maki; I. Manuilov; J. Marin; J.L. Narjoux; L. Nemenov; M. Nikitin; T. Nunez Pardo; K. Okada; V. Olchevskii; A. Pazos; M. Pentia; A. Penzo; J.M. Perreau; M. Plo; T. Ponta; G.F. Rappazzo; A. Riazantsev; J.M. Rodriguez; A. Rodriguez Fernandez; A. Romero Vidal; V.M. Ronjin; V. Rykalin; J. Saborido; C. Santamarina; J. Schacher; C. Schuetz; A. Sidorov; J. Smolik; F. Takeutchi; A. Tarasov; L. Tauscher; M.J. Tobar; T. Trojek; S. Trusov; V. Utkin; O. Vázquez Doce; S. Vlachos; O. Voskresenskaya; T. Vrba; C. Willmott; V. Yazkov; Y. Yoshimura; M. Zhabitsky; P. Zrelov

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Determination of ππ scattering lengths from measurement of π + π ? atom lifetime

机译：根据测量ππ散射长度“ display =” inline“ overflow =” scroll“> π + π ？原子寿命

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The DIRAC experiment at CERN has achieved a sizeable production ofπ+π?atoms and has significantly improved the precision on its lifetime determination. From a sample of 21?227 atomic pairs, a 4% measurement of the S-waveππscattering length difference|a0?a2|=(0.2533?0.0078+0.0080|stat|syst?0.0073+0.0078)Mπ+?1has been attained, providing an important test of Chiral Perturbation Theory.

机译：CERN的DIRAC实验已经实现了相当数量的π+πα原子生产，并显着提高了其寿命确定的精度。从21〜227个原子对的样本中，获得S波ππ散射长度差|a0≤a2| =（0.2533≤0.0078+ 0.0080 | stat |syst≤0.0073+ 0.0078）Mπ+≤1的4％的测量值，手性摄动理论的重要检验。

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《Physics letters》 |2011年第2期|共6页
作者
B. Adeva; L. Afanasyev; M. Benayoun; A. Benelli; Z. Berka; V. Brekhovskikh; G. Caragheorgheopol; T. Cechak; M. Chiba; P.V. Chliapnikov; C. Ciocarlan; S. Constantinescu; S. Costantini; C. Curceanu (Petrascu); P. Doskarova; D. Dreossi; D. Drijard; A. Dudarev; M. Ferro-Luzzi; J.L. Fungueiri?o Pazos; M. Gallas Torreira; J. Gerndt; P. Gianotti; D. Goldin; F. Gomez; A. Gorin; O. Gorchakov; C. Guaraldo; M. Gugiu; M. Hansroul; Z. Hons; R. Hosek; M. Iliescu; V. Karpukhin; J. Kluson; M. Kobayashi; P. Kokkas; V. Komarov; V. Kruglov; L. Kruglova; A. Kulikov; A. Kuptsov; K.I. Kuroda; A. Lamberto; A. Lanaro; V. Lapshin; R. Lednicky; P. Leruste; P. Levi Sandri; A. Lopez Aguera; V. Lucherini; T. Maki; I. Manuilov; J. Marin; J.L. Narjoux; L. Nemenov; M. Nikitin; T. Nunez Pardo; K. Okada; V. Olchevskii; A. Pazos; M. Pentia; A. Penzo; J.M. Perreau; M. Plo; T. Ponta; G.F. Rappazzo; A. Riazantsev; J.M. Rodriguez; A. Rodriguez Fernandez; A. Romero Vidal; V.M. Ronjin; V. Rykalin; J. Saborido; C. Santamarina; J. Schacher; C. Schuetz; A. Sidorov; J. Smolik; F. Takeutchi; A. Tarasov; L. Tauscher; M.J. Tobar; T. Trojek; S. Trusov; V. Utkin; O. Vázquez Doce; S. Vlachos; O. Voskresenskaya; T. Vrba; C. Willmott; V. Yazkov; Y. Yoshimura; M. Zhabitsky; P. Zrelov;
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中图分类数理科学和化学;
关键词
DIRAC experimentElementary atomPionium atomPion scattering;

机译：DIRAC实验基本原子ion原子离子散射;

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Determination of ππ scattering lengths from measurement of π + π ? atom lifetime

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