A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for  D + → K S π +  and  D + → K S K + . We have measured the following asymmetry parameters relative to  D + → K − π + π + :  A CP ( K S π + ) = ( − 1.6 ± 1.5 ± 0.9 ) % ,  A CP ( K S K + ) = ( + 6.9 ± 6.0 ± 1.5 ) % , and  A CP ( K S K + ) = ( + 7.1 ± 6.1 ± 1.2 ) %  relative to  D + → K S π + . We have also measured the relative branching ratios and found  Γ ( D + → ¯ K 0 π + ) / Γ ( D + → K − π + π + ) = ( 30.60 ± 0.46 ± 0.32 ) % ,  Γ ( D + → ¯ K 0 K + ) / Γ ( D + → K − π + π + ) = ( 6.04 ± 0.35 ± 0.30 ) % , and  Γ ( D + → ¯ K 0 K + ) / Γ ( D + → ¯ K 0 π + ) = ( 19.96 ± 1.19 ± 0.96 ) % .

Link, J., Reyes, M., Yager, P., Anjos, J., Bediaga, I., Gobel, C., et al. (2002). Search for CP Violation in the decays D + → K S π + and D + → K S K +. PHYSICAL REVIEW LETTERS, 88(4) [10.1103/PhysRevLett.88.041602].

Search for CP Violation in the decays D + → K S π + and D + → K S K +

Gianini G;
2002

Abstract

A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for  D + → K S π +  and  D + → K S K + . We have measured the following asymmetry parameters relative to  D + → K − π + π + :  A CP ( K S π + ) = ( − 1.6 ± 1.5 ± 0.9 ) % ,  A CP ( K S K + ) = ( + 6.9 ± 6.0 ± 1.5 ) % , and  A CP ( K S K + ) = ( + 7.1 ± 6.1 ± 1.2 ) %  relative to  D + → K S π + . We have also measured the relative branching ratios and found  Γ ( D + → ¯ K 0 π + ) / Γ ( D + → K − π + π + ) = ( 30.60 ± 0.46 ± 0.32 ) % ,  Γ ( D + → ¯ K 0 K + ) / Γ ( D + → K − π + π + ) = ( 6.04 ± 0.35 ± 0.30 ) % , and  Γ ( D + → ¯ K 0 K + ) / Γ ( D + → ¯ K 0 π + ) = ( 19.96 ± 1.19 ± 0.96 ) % .
Articolo in rivista - Articolo scientifico
Physic
English
2002
88
4
041602
none
Link, J., Reyes, M., Yager, P., Anjos, J., Bediaga, I., Gobel, C., et al. (2002). Search for CP Violation in the decays D + → K S π + and D + → K S K +. PHYSICAL REVIEW LETTERS, 88(4) [10.1103/PhysRevLett.88.041602].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/455820
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