Study of the decay asymmetry parameter and CP violation parameter in the Λ+c →Λπ+ decay

J. M. Link; P. M. Yager; J. C. Anjos; I. Bediaga; C. Castromonte; C. Gobel; A. A. Machado; J. Magnin; A. Massafferri; J. M. de Miranda; I. M. Pepe; E. Polycarpo; A. C. dos Reis; S. Carrillo; E. Casimiro; E. Cuautle; A. Sanchez Hernandez; C. Uribe; F. Vazquez; L. Agostino; L. Cinquini; J. P. Cumalat; B. O'Reilly; I. Segoni; K. Stenson; J. N. Butler; Falso Cheung; G. Chiodini; I. Gaines; P. H. Garbincius; L. A. Garren; E. Gottschalk; P. H. Kasper; A. E. Kreymer; R. Kutschke; M. Wang; L. Benussi; M. Bertani; S. Bianco; F. L. Fabbri; S. Pacetti; A. Zallo; M. Reyes; C. Cawlfield; D. Y. Kim; A. Rahimi; J. Wiss; R. Gardner; A. Kryemadhi; Y. S. Chung; J. S. Kang; B. R. Ko; J. W. Kwak; K. B. Lee; K. Cho; H. Park; G. Alimonti; S. Barberis; M. Boschini; A. Cerutti; P. D'Angelo; M. Di Corato; P. Dini; L. Edera; S. Erba; P. Inzani; F. Leveraro; S. Malvezzi; D. Menasce; M. Mezzadri; L. Moroni; D. Pedrini; C. Pontoglio; F. Prelz; M. Rovere; S. Sala; T. F. Davenport; V. Arena; G. Boca; G. Bonomi; G. Gianini; G. Liguori; D. L. Pegna; M. M. Merlo; D. Pantea; S. P. Ratti; C. Riccardi; P. Vitulo; H. Hernandez; A. M. Lopez; H. Mendez; A. Paris; J. Quinones; J. E. Ramirez; Y. Zhang; J. R. Wilson; T. Handler; R. Mitchell; D. Engh; M. Hosack; W. E. Johns; E. Luiggi; J. E. Moore; M. Nehring; P. D. Sheldon; E. W. Vaandering; M. Webster; M. Sheaff

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Archivio Istituzionale della Ricerca dell'Università degli Studi di Milano

Article . 2006

Data sources: Archivio Istituzionale della Ricerca dell'Università degli Studi di Milano

Study of the decay asymmetry parameter and CP violation parameter in the Λ+c →Λπ+ decay

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2006 Italy English Publisher:North-Holland

Authors: J. M. Link; P. M. Yager; J. C. Anjos; I. Bediaga; C. Castromonte; C. Gobel; A. A. Machado; +101 Authors

handle: 2434/30073

Study of the decay asymmetry parameter and CP violation parameter in the Λ+c →Λπ+ decay

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Abstract

Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter alpha(Lambdac) in Lambdac --> Lambda pi decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter : A = [alpha(Lambdac)+alpha(antiLambda_c)]/[alpha(Lambdac)-alpha(antiLambda_c)]. We obtain alpha(Lambdac)=-0.78+-0.16+-0.13 and A = -0.07+-0.19+-0.12 where errors are statistical and systematic.

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Italy

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University of Milan
Italy

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