D-meson lifetimes

M. Aguilar-Benitez,W.W.M. Allison,J.L. Bailly,W. Bartl,M. Begalli,P. Beilliére,H. Briand, V. Canale,C. Caso,E. Castelli,P. Checchia,P.V. Chliapnikov, N. Colino,S.J. Colwill,R. Contri,D. Crennell,A. De Angelis,L. De Billy,C. Defoix,R. Di Marco,E. Di Capua,F. Diez-Hedo,J. Dolbeau,J. Duboc,Mats Eriksson,S. Falciano,C. Fernandez,C. Fisher,Yu.V. Fisyak,F. Fontanelli,J R Fry, U. Gasparini,U. Gensch,S. Gentile,D.B. Gibaut, A.T. Goshaw,F. Grard,R. Hamatsu,L. Haupt,S. Hellman,J.J. Hernandez, S.O. Holmgren, M. Houlden, J. Hrubec,P. Hughes,D. Huss,Y. Iga,M. Iori,E. Jegham,K.E. Johansson,M.I. Josa,M. Kalelkar,A.G. Kholodenko,E.P. Kistenev,S. Kitamura,D. Knauss,V.V. Kniazev,W. Kowald, D. Kuhn,M. Laloum,P. Legros,H. Leutz,Louis Lyons,M. Macdermott,P.K. Malhotra,Peggy A Mason, M. Mazzucato,A. Michalon,M.E. Michalon-Mentzer, T. Moa,R. Monge,L. Montanet,G. Neuhofer,H.K. Nguyen,S. Nilsson,H. Nowak,N. Oshima,G. Otter,R. Ouared,J. Panella Comellas,G D Patel, M. Pernicka,P. Pilette,C. Pinori,G. Piredda,R J Plano,A. Poppleton,P. Poropat,Raghu Pati Raghavan, S. Reucroft,Kari M Roberts,W.J. Robertson, H. Rohringer,J.M. Salicio,R. Schulte,B. Sellden,M. Sessa,S. Squarcia,P. Stamer,V.A. Stopchenko,Arvind Subramanian, K. Sudhakar,Kenichiro Takahashi,M.C. Touboul,U. Trevisan,C. Troncon,T. Tsurugai,P. Vilain,E.V. Vlasov,C. Voltolini,B. Vonck,W.D. Walker,C.F. Wild, G. Zumerle

Physics Letters B（1987）

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摘要

We present the final results on the D-meson liftime measurements obtained by the NA27 experiment. From a sample of 145 D 0 D 0 and 149 D ± decays, we have measured τ (D 0 )=(4.6 +0.6 −0.5 )×10 −13 s, τ (D ± )=(11.2 +1.4 −1.1 )×10 −13 s, with a ratio R= τ( D ± ) τ( D 0 ) =2.4±0.4 .

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