Dalitz plot analysis of the D+ ---> K- pi+ pi+ decay in the FOCUS experiment

Journal Article · Tue May 01 04:00:00 EDT 2007 · Phys.Lett.B653:1-11,2007

DOI:https://doi.org/10.1016/j.physletb.2007.06.070· OSTI ID:914595

Link, J M; Yager, P M; Anjos, J C; Bediaga, I; Castromonte, C; Machado, A A; Magnin, J; Massafferri, A; de Miranda, J M; Pepe, I M; Polycarpo, E

Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we performed a Dalitz plot analysis of the Cabibbo favored decay D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup +}. This study uses 53653 Dalitz-plot events with a signal fraction of {approx} 97%, and represents the highest statistics, most complete Dalitz plot analysis for this channel. Results are presented and discussed using two different formalisms. The first is a simple sum of Breit-Wigner functions with freely fitted masses and widths. It is the model traditionally adopted and serves as comparison with the already published analyses. The second uses a K-matrix approach for the dominant S-wave, in which the parameters are fixed by first fitting K{pi} scattering data and continued to threshold by Chiral Perturbation Theory. We show that the Dalitz plot distribution for this decay is consistent with the assumption of two body dominance of the final state interactions and the description of these interactions is in agreement with other data on the K{pi} final state.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 914595
• Report Number(s): FERMILAB-PUB-07-127-E; arXiv eprint number arXiv:0705.2248
• Journal Information: Phys.Lett.B653:1-11,2007, Journal Name: Phys.Lett.B653:1-11,2007 Vol. 653
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
DALITZ PLOT
DECAY
DISTRIBUTION
Experiment-HEP
FERMILAB
FINAL-STATE INTERACTIONS
K MATRIX
PERTURBATION THEORY
PHOTOPRODUCTION
SCATTERING
STATISTICS