Download or read book Study of the D0 ---] K+ K- Pi+ Pi- written by and published by . This book was released on 2004 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data from the FOCUS (E831) experiment at Fermilab, the authors present a new measurement for the Cabibbo-suppressed decay mode D° 2!KK−?+?−. They measure:?(D° 2!K+K−?+?−)/?(D° 2!K−?−?+?+) = 0.0295 ± 0.0011 ± 0.0008. An amplitude analysis has been performed in order to determine the resonant substructure of this decay mode. The dominant components are the decays D° 2!K1(1270)+ K−, D° 2!K1(1400)+K− and D° 2!?(770)°?(1020).