Search for CP violation in the decays D+--> K(S)pi+ and D+-->K(S)K+

J M Link; M Reyes; P M Yager; J C Anjos; I Bediaga; C Göbel; J Magnin; A Massafferri; J M de Miranda; I M Pepe; A C dos Reis; S Carrillo; E Casimiro; A Sánchez-Hernández; C Uribe; F Vázquez; L Cinquini; J P Cumalat; B O'Reilly; J E Ramirez; E W Vaandering; J N Butler; H W K Cheung; I Gaines; P H Garbincius; L A Garren; E Gottschalk; P H Kasper; A E Kreymer; R Kutschke; S Bianco; F L Fabbri; A Zallo; 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; H Park; G Alimonti; M Boschini; P D'Angelo; M DiCorato; P Dini; M Giammarchi; P Inzani; F Leveraro; S Malvezzi; D Menasce; M Mezzadri; L Milazzo; L Moroni; D Pedrini; C Pontoglio; F Prelz; M Rovere; S Sala; T F Davenport 3rd; L Agostino; V Arena; G Boca; G Bonomi; G Gianini; G Liguori; M M Merlo; D Pantea; S P Ratti; C Riccardi; I Segoni; P Vitulo; H Hernandez; A M Lopez; H Mendez; L Mendez; A Mirles; E Montiel; D Olaya; A Paris; J Quinones; C Rivera; W Xiong; Y Zhang; J R Wilson; K Cho; T Handler; R Mitchell; D Engh; M Hosack; W E Johns; M Nehring; P D Sheldon; K Stenson; M Webster; M Sheaff; FOCUS Collaboration

doi:10.1103/PhysRevLett.88.041602

Search for CP violation in the decays D+--> K(S)pi+ and D+-->K(S)K+

Phys Rev Lett. 2002 Jan 28;88(4):041602. doi: 10.1103/PhysRevLett.88.041602. Epub 2002 Jan 14.

Authors

J M Link¹, M Reyes, P M Yager, J C Anjos, I Bediaga, C Göbel, J Magnin, A Massafferri, J M de Miranda, I M Pepe, A C dos Reis, S Carrillo, E Casimiro, A Sánchez-Hernández, C Uribe, F Vázquez, L Cinquini, J P Cumalat, B O'Reilly, J E Ramirez, E W Vaandering, J N Butler, H W K Cheung, I Gaines, P H Garbincius, L A Garren, E Gottschalk, P H Kasper, A E Kreymer, R Kutschke, S Bianco, F L Fabbri, A Zallo, 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, H Park, G Alimonti, M Boschini, P D'Angelo, M DiCorato, P Dini, M Giammarchi, P Inzani, F Leveraro, S Malvezzi, D Menasce, M Mezzadri, L Milazzo, L Moroni, D Pedrini, C Pontoglio, F Prelz, M Rovere, S Sala, T F Davenport 3rd, L Agostino, V Arena, G Boca, G Bonomi, G Gianini, G Liguori, M M Merlo, D Pantea, S P Ratti, C Riccardi, I Segoni, P Vitulo, H Hernandez, A M Lopez, H Mendez, L Mendez, A Mirles, E Montiel, D Olaya, A Paris, J Quinones, C Rivera, W Xiong, Y Zhang, J R Wilson, K Cho, T Handler, R Mitchell, D Engh, M Hosack, W E Johns, M Nehring, P D Sheldon, K Stenson, M Webster, M Sheaff; FOCUS Collaboration

Affiliation

¹ University of California, Davis, California 95616, USA.

PMID: 11801103
DOI: 10.1103/PhysRevLett.88.041602

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)pi+ and D+-->K(S)K+. We have measured the following asymmetry parameters relative to D+-->K-pi+pi+: A(CP)(K(S)pi+) = (-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)pi+. We have also measured the relative branching ratios and found Gamma(D+-->K(0)pi+)/Gamma(D+-->K-pi+pi+) = (30.60+/-0.46+/-0.32)%, Gamma(D+-->K(0)K+)/Gamma(D+-->K-pi+pi+) = (6.04+/-0.35+/-0.30)%, and Gamma(D+-->K(0)K+)/Gamma(D+-->K(0)pi+) = (19.96+/-1.19+/-0.96)%.