DALITZ PLOT ANALYSES FROM FOCUS

2005 ◽  
Vol 20 (02n03) ◽  
pp. 482-492 ◽  
Author(s):  
◽  
PAOLO DINI
Keyword(s):  
Matrix Model ◽  
Dalitz Plot ◽  
Decay Amplitude ◽  
Meson Decay ◽  
Charm Meson ◽  
Final State ◽  
Isobar Model ◽  
Plot Analysis ◽  
Final State Interactions ◽  
K Matrix

Charm meson decay-dynamics has been extensively studied in the last decade. Dalitz plot analysis has revealed as a powerful tool for investigating effects of resonant substructures, interference patterns and final-state-interactions in the charm sector. Recent results from FOCUS on D+ and Ds decays will be presented with particular emphasis on the decay amplitude formalism; Isobar model and K-matrix model results will be compared and discussed.

scholarly journals RESONANCES AND WEAK INTERACTIONS IN D+→ π+π−π+ DECAYS

2007 ◽  
Vol 16 (09) ◽  
pp. 2876-2879 ◽  
Author(s):  
DIOGO R. BOITO ◽  
BRUNO EL-BENNICH ◽  
BENOÎT LOISEAU ◽  
OLIVIER LEITNER
Keyword(s):  
Weak Interactions ◽  
Decay Amplitude ◽  
D Meson ◽  
Final State ◽  
Meson Decays ◽  
Factorization Approximation ◽  
Weak Part ◽  
Unitary Model ◽  
Final State Interactions ◽  
Three Body

We describe the ππS-wave in D+→ π+π−π+ decays using a unitary model for the ππ Final State Interactions (FSI). The three body decay is treated as a quasi two-body process where, at the weak vertex, the D meson decays into a resonance and a pion. The weak part of the decay amplitude is evaluated using the effective weak Hamiltonian within the factorization approximation.

Generalized Dalitz plot analysis of the near-thresholdpp→ppK+K−reaction in view of theK+K−final state interaction

2009 ◽  
Vol 80 (4) ◽  
Author(s):  
M. Silarski ◽  
P. Moskal ◽  
E. Czerwiński ◽  
R. Czyżykiewicz ◽  
D. Gil ◽  
...  
Keyword(s):  
Dalitz Plot ◽  
Final State Interaction ◽  
State Interaction ◽  
Final State ◽  
Plot Analysis

scholarly journals On the role of final-state interactions in Dalitz plot studies

2012 ◽  
Vol 225-227 ◽  
pp. 75-79 ◽  
Author(s):  
Bastian Kubis ◽  
Franz Niecknig ◽  
Sebastian P. Schneider
Keyword(s):  
Dalitz Plot ◽  
Final State ◽  
Final State Interactions

EXTRACTING THE CKM PHASE ANGLE γ(≡ φ3) FROM ISOSPIN ANALYSIS IN B → Kπ DECAY

2008 ◽  
Vol 23 (21) ◽  
pp. 3300-3303
Author(s):  
C. S. KIM ◽  
SECHUL OH ◽  
YEO WOONG YOON
Keyword(s):  
Phase Angle ◽  
New Physics ◽  
Theoretical Assumption ◽  
Final State ◽  
Cp Asymmetry ◽  
Breaking Effect ◽  
Plot Analysis ◽  
Hadronic Uncertainty ◽  
Final State Interactions ◽  
Current Experimental Data

We propose a new method to extract the CKM phase angle γ(≡ φ3) from the isospin analysis in B → Kπ decays only. Unlike previously proposed methods, we do not employ flavor SU (3) symmetry, so that this method is free from the hadronic uncertainty coming from the SU (3) breaking effect. Neither we adopt any Dalitz-plot analysis, which may involve multiple strong phases and large final state interactions. Since no theoretical assumption, except the isospin relations, is imposed on B → Kπ decays, this method will work well, regardless of possible new physics effects unless the isospin relations do not hold. Since the mixing induced CP asymmetry SKSπ0 plays a crucial role in this method, more precise measurement on SKSπ0 in future experiments will be greatly helpful to extract γ accurately. Using current experimental data for B → Kπ including SKSπ0, we extract γ within [Formula: see text] or [Formula: see text].

scholarly journals Unitarization Technics in Hadron Physics with Historical Remarks

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1114
Author(s):  
José Antonio Oller
Keyword(s):  
Effective Range Expansion ◽  
Chiral Perturbation ◽  
Final State ◽  
Hadron Physics ◽  
Coupled Channels ◽  
Inverse Amplitude Method ◽  
Final State Interactions ◽  
Historical Remarks ◽  
K Matrix ◽  
Inverse Amplitude

We review a series of unitarization techniques that have been used during the last decades, many of them in connection with the advent and development of current algebra and later of Chiral Perturbation Theory. Several methods are discussed like the generalized effective-range expansion, K-matrix approach, Inverse Amplitude Method, Padé approximants and the N / D method. More details are given for the latter though. We also consider how to implement them in order to correct by final-state interactions. In connection with this some other methods are also introduced like the expansion of the inverse of the form factor, the Omnés solution, generalization to coupled channels and the Khuri-Treiman formalism, among others.

scholarly journals RESONANT FINAL-STATE INTERACTIONS IN $D^0\rightarrow{\bar K}^0\eta,~{\bar K}^0\eta^\prime$ DECAYS

2000 ◽  
Vol 15 (26) ◽  
pp. 4163-4178
Author(s):  
EL HASSAN EL AAOUD ◽  
A. N. KAMAL
Keyword(s):  
Resonant State ◽  
Decay Amplitude ◽  
Branching Ratio ◽  
Coupling Constants ◽  
Final State ◽  
Shell Effects ◽  
State Formula ◽  
Final State Interactions ◽  
Weak Transition ◽  
Sum Formula

We have investigated the effect of the isospin ½, JP=0+ resonant state [Formula: see text] on the decays [Formula: see text] and [Formula: see text] as a function of the branching ratio sum [Formula: see text] and coupling constants [Formula: see text]. We have used a factorized input for [Formula: see text] weak transition through a πK loop. We estimated both on- and off-shell contributions from the loop. Our calculation shows that the off-shell effects are significant. For r≥30% a fit to the decay amplitude [Formula: see text] was possible, but the amplitude [Formula: see text] remained at its factorized value. For small values of r, r≤18%, we were able to fit [Formula: see text], and despite the fact that [Formula: see text] could be raised by almost 100% over its factorized value, it still falls short of its experimental value. A simultaneous fit to both amplitudes [Formula: see text] and [Formula: see text] was not possible. We have also determined the strong phase of the resonant amplitudes for both decays.

ANALYSIS OF η → π+π-γ MEASURED WITH THE WASA FACILITY AT COSY

2011 ◽  
Vol 26 (03n04) ◽  
pp. 715-717
Author(s):  
◽  
CHRISTOPH F. REDMER
Keyword(s):  
Background Subtraction ◽  
Dalitz Plot ◽  
Final State ◽  
Data Set ◽  
Final State Interactions ◽  
Exclusive Measurement

The decay η → π+π-γ has been measured with the WASA facility at COSY. The largest data set taken so far in an exclusive measurement was acquired, with 13740±140 events after background subtraction. Efficiency corrected Dalitz plot distributions have been extracted, which show the importance of final state interactions for the understanding of the decay.

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