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Title: Study of the doubly and singly Cabibbo suppressed decays D+ ---> K+ pi+ pi- and D+(s) ---> K+ pi+ pi-

Journal Article · · Phys.Lett.B

Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we study the doubly and singly Cabibbo suppressed decays D + and D s + → K + π + π - . Our measurements of Γ ( D + → K + π + π - ) / Γ ( D + → K - π + π + ) = 0.0065 ± 0.0008 ± 0.0004 and Γ ( D s + → K + π + π - ) / Γ ( D s + → K + K - π + ) = 0.127 ± 0.007 ± 0.014 are based on samples of 189 ± 24 D + and 567 ± 31 D s + reconstructed events, respectively. We also present Dalitz plot analyses of the two decay channels; the amplitude analysis of the D s + → K + π + π - mode is performed for the first time.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
FOCUS
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1893512
Report Number(s):
FERMILAB-PUB-04-115-E; arXiv:hep-ex/0407014; oai:inspirehep.net:654030
Journal Information:
Phys.Lett.B, Vol. 601
Country of Publication:
United States
Language:
English

References (9)

Study of the Cabibbo-suppressed decay modes D0→π−π+ and D0→K−K+ journal March 2003
New measurements of the D0 and D+ lifetimes journal June 2002
Dalitz plot analysis of Ds+ and D+ decay to π+π−π+ using the K-matrix formalism journal April 2004
Review of Particle Properties journal July 2002
Description and performance of the Fermilab E687 spectrometer
  • Frabetti, P. L.; Giordano, V.; Molinari, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 320, Issue 3 https://doi.org/10.1016/0168-9002(92)90948-4
journal September 1992
Analysis of the D+, Ds+ → K+K−π+ Dalitz plots journal June 1995
On the nature of 0+ mesons journal July 1976
Analysis of the D+, Ds+ → π−π+π+ Dalitz plots journal August 1997
A measurement of lifetime differences in the neutral D-meson system journal July 2000

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS