First measurement of the [formula omitted] atom lifetime

B Adeva,M Iliescu,L Afanasyev,S Vlachos,C Guaraldo,D Drijard,Z Berka,A Lamberto,M Benayoun,I Kurochkin,J Schacher,S Trusov,M Chiba,A Ryazantsev,P Kokkas,M Kobayashi,C Detraz,N Manthos,V Olchevskii,T Núñez Pardo,M.J Tobar,O Vázquez Doce,P Zrelov,A Lanaro,V Lucherini,T Ponta,L Montanet,Y Yoshimura,A Sidorov,J Saborido,A Penzo,P Gianotti,M Hansroul,D Pop,A Pazos,L Tauscher,A Dudarev,D Goldin,A Benelli,P Vázquez,M Pló,V Brekhovskikh,C Santamarina,I Manuilov,A Romero,M Zhabitsky,A Rodriguez Fernandez,A Kulikov,R Giacomich,A Gorin,M Nikitin,C Petrascu,F Gómez,I Evangelou,J Gerndt,M Pentia,G Caragheorgheopol,S Constantinescu,V Yazkov,L Kruglova,P Levi Sandri,A.v Tarasov ,M V Gallas ,V.g Lapshin ,V.i Rykalin ,Kenji Okada ,J L Narjoux ,O.e Gorchakov ,C Schuetz ,M Ferro‐Luzzi ,T Čechák ,G F Rappazzo ,A López Agüera ,R Hošek ,Ph Leruste ,F Takéutchi ,Victor A Utkin ,Diego Dreossi ,R Lednický ,T Mäki ,V.v Karpukhin ,V.i Komarov ,J Klusoň ,J Smolík ,L.l Nemenov ,J.m Perreau ,V.v Kruglov ,K Kuroda ,A.v Kuptsov

doi:10.1016/j.physletb.2005.05.045

First measurement of the [formula omitted] atom lifetime

B Adeva, M Iliescu + Show 87 more

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https://doi.org/10.1016/j.physletb.2005.05.045

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Journal: Physics Letters B	Publication Date: May 31, 2005
Citations: 91	License type: cc-by

Affiliation: University of Santiago de Compostela, Dubna State University, European Organization for Nuclear Research, Czech Technical University in Prague, Sorbonne Université, Université Paris Cité, Laboratoire de Physique Nucléaire et de Hautes Énergies, Institut National de Physique Nucléaire et de Physique des Particules, French National Centre for Scientific Research, National Laboratory of Frascati, Tokyo Metropolitan University, University of Basel, Institute for High Energy Physics, University of Ioannina, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering

#Atom Lifetime #Major Errors + Show 3 more

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Abstract

The goal of the DIRAC experiment at CERN (PS212) is to measure the π+π− atom lifetime with 10% precision. Such a measurement would yield a precision of 5% on the value of the S-wave ππ scattering lengths combination |a0−a2|. Based on part of the collected data we present a first result on the lifetime, τ=[2.91−0.62+0.49]×10−15 s, and discuss the major systematic errors. This lifetime corresponds to |a0−a2|=0.264−0.020+0.033mπ−1.

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