Title
Study of the decay asymmetry parameter and CP violation parameter in the Λc+ → Λπ+ decay
Date Issued
09 March 2006
Access level
open access
Resource Type
journal article
Author(s)
Link J.M.
Yager P.M.
Anjos J.C.
Bediaga I.
Machado A.A.
Magnin J.
Massafferri A.
De Miranda J.M.
Pepe I.M.
Polycarpo E.
Dos Reis A.C.
Carrillo S.
Casimiro E.
Cuautle E.
Sánchez-Hernández A.
Uribe C.
Vázquez F.
Agostino L.
Cinquini L.
Cumalat J.P.
O'Reilly B.
Segoni I.
Stenson K.
Butler J.N.
Cheung H.W.K.
Chiodini G.
Gaines I.
Garbincius P.H.
Garren L.A.
Gottschalk E.
Kasper P.H.
Kreymer A.E.
Kutschke R.
Wang M.
Benussi L.
Bertani M.
Bianco S.
Fabbri F.L.
Pacetti S.
Zallo A.
Reyes M.
Cawlfield C.
Kim D.Y.
Rahimi A.
Wiss J.
Gardner R.
Kryemadhi A.
Chung Y.S.
Kang J.S.
Ko B.R.
Kwak J.W.
Lee K.B.
Cho K.
Park H.
Alimonti G.
Barberis S.
Boschini M.
Cerutti A.
D'Angelo P.
DiCorato M.
Dini P.
Edera L.
Erba S.
Inzani P.
Leveraro F.
Malvezzi S.
Menasce D.
Mezzadri M.
Moroni L.
Pedrini D.
Pontoglio C.
Prelz F.
Rovere M.
Sala S.
Davenport T.F.
Arena V.
Boca G.
Bonomi G.
Gianini G.
Liguori G.
Lopes Pegna D.
Merlo M.M.
Pantea D.
Ratti S.P.
Riccardi C.
Vitulo P.
Göbel C.
Olatora J.
Hernandez H.
Lopez A.M.
Mendez H.
Paris A.
Quinones J.
Ramirez J.E.
Zhang Y.
Wilson J.R.
Handler T.
Mitchell R.
Engh D.
Centro Brasileiro de Pesquisas Físicas
Abstract
Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the weak decay-asymmetry parameter αΛc in Λc+→Λπ+ decay. Comparing particle with antiparticle decays, we obtain the first measurement of the CP violation parameter A≡αΛc+α Λc/αΛc-αΛc. We obtain αΛc=-0.78±0.16±0.19 and A=-0.07±0.19±0.24 where errors are statistical and systematic. © 2006 Elsevier B.V. All rights reserved.
Start page
165
End page
172
Volume
634
Issue
March 2
Language
English
OCDE Knowledge area
Física nuclear
Scopus EID
2-s2.0-33144475210
Source
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN of the container
03702693
Sponsor(s)
We wish to acknowledge the assistance of the staffs of Fermi National Accelerator Laboratory, the INFN of Italy, and the physics departments of the collaborating institutions. This research was supported in part by the US National Science Foundation, the US Department of Energy, the Italian Istituto Nazionale di Fisica Nucleare and Ministero della Istruzione Università e Ricerca, the Brazilian Conselho Nacional de Desenvolvimento Científico e Tecnológico, CONACyT-México, and the Korea Research Foundation of the Korean Ministry of Education.
Sources of information:
Directorio de Producción Científica
Scopus