Measurement of the doubly Cabibbo suppressed decay D0 ---> K+ pi- and a search for charm mixing

Journal Article · Wed Dec 01 04:00:00 EST 2004 · Phys.Lett.B618:23-33,2005

OSTI ID:15017333

Link, J M; Yager, P M; Anjos, J C; Bediaga, I; Gobel, C; Machado, A A; Magnin, J; Massafferri, A; de Miranda, J M; Pepe, I M; Polycarpo, E; dosReis, A C; Carrillo, S; Casimiro, E; Cuautle, E; Sanchez-Hernandez, A; Uribe, C; Vazquez, F; Agostino, L; Cinquini, L

The authors present an analysis of the decay D{sup 0} {yields} K{sup +}{pi}{sup -} based on FOCUS data. From a sample of 234 signal events, they find a branching ratio of {Lambda}(D{sup 0} {yields} K{sup +}{pi}{sup -})/{Lambda}(D{sup 0} {yields} K{sup -}{pi}{sup +}) = (0.429{sub -0.061}{sup +0-.063} {+-} 0.027)% under the assumptions of no mixing and no CP violation. Allowing for CP violation, the find a branching ratio of (0.435{sub -0.061}{sup +0.063} {+-} 0.028)% and a CP asymmetry of 0.178{sub -0.141}{sup +0.144} {+-} 0.041. The branching ratio for the case of mixing with no CP violation is (0.381{sub -0.163}{sup +0.167} {+-} 0.092)%. They also present limits on charm mixing.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 15017333
• Report Number(s): FERMILAB-PUB-04-398-E; arXiv eprint number hep-ex/0412034
• Journal Information: Phys.Lett.B618:23-33,2005, Journal Name: Phys.Lett.B618:23-33,2005
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BRANCHING RATIO
DECAY
Experiment-HEP