visitant ::
identificació
|
|||||||||||||||
Cerca | Lliura | Ajuda | Servei de Biblioteques | Sobre el DDD | Català English Español |
Pàgina inicial > Articles > Articles publicats > Measurement of partial widths and search for direct CP violation in D0 meson decays to K−K+ and π−π+ |
Data: | 2005 |
Resum: | We present a measurement of relative partial widths and decay rate CP asymmetries in K−K+ and π−π+ decays of D0 mesons produced in pp¯ collisions at s√=1. 96 TeV. We use a sample of 2×105 D*+→D0π+ (and charge conjugate) decays with the D0 decaying to K−π+, K−K+, and π−π+, corresponding to 123 pb−1 of data collected by the Collider Detector at Fermilab II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed. We measure Γ(D0→K−K+)/Γ(D0→K−π+)=0. 0992±0. 0011±0. 0012, Γ(D0→π−π+)/Γ(D0→K−π+)=0. 035 94±0. 000 54±0. 000 40, ACP(K−K+)=(2. 0±1. 2±0. 6)%, and ACP(π−π+)=(1. 0±1. 3±0. 6)%, where, in all cases, the first uncertainty is statistical and the second is systematic. |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; Versió publicada |
Matèria: | 1960 GeV-cms ; Batavia TEVATRON Coll ; CDF ; D*(2010) --> D0 pi+ ; D*(2010): hadronic decay ; D0 --> K+ K- ; D0 --> K- pi+ ; D0 --> pi+ pi- ; D0: hadronic decay ; D0: width ; Anti-p p ; D*(2010) anything ; Colliding beams ; Inclusive reaction |
Publicat a: | Physical review letters, Vol. 94, Issue 12 (April 2005) , p. 122001-1-122001-7, ISSN 1079-7114 |
7 p, 143.5 KB |