scholarly journals Axial vector transition form factors of N → Δ in QCD

2016 ◽  
Vol 913 ◽  
pp. 132-150 ◽  
Author(s):  
A. Kucukarslan ◽  
U. Ozdem ◽  
A. Ozpineci
Keyword(s):  
Axial Vector ◽  
Form Factors ◽  
Transition Form

scholarly journals Isovector axial vector and pseudoscalar transition form factors ofΔin QCD

2014 ◽  
Vol 90 (5) ◽  
Author(s):  
A. Kucukarslan ◽  
U. Ozdem ◽  
A. Ozpineci
Keyword(s):  
Axial Vector ◽  
Form Factors ◽  
Transition Form

scholarly journals D → a1, f1 transition form factors and semileptonic decays via 3-point QCD sum rules

2016 ◽  
Vol 31 (20n21) ◽  
pp. 1650116 ◽  
Author(s):  
Yabing Zuo ◽  
Yue Hu ◽  
Linlin He ◽  
Wei Yang ◽  
Yan Chen ◽  
...  
Keyword(s):  
Sum Rules ◽  
Axial Vector ◽  
Form Factors ◽  
Semileptonic Decays ◽  
Branching Ratios ◽  
Transition Form ◽  
Vector Mesons ◽  
Qcd Sum Rules ◽  
The Future ◽  
Spin Triplet

By using the 3-point QCD sum rules, we calculate the transition form factors of [Formula: see text] decays into the spin triplet axial vector mesons [Formula: see text], [Formula: see text], [Formula: see text]. In the calculations, we consider the quark contents of each meson in detail. In view of the fact that the isospin of [Formula: see text] is one, we calculate the [Formula: see text] and [Formula: see text] transition form factors separately. In the case of [Formula: see text], [Formula: see text], the mixing between light flavor [Formula: see text] singlet and octet is taken into account. Based on the form factors obtained here, we give predictions for the branching ratios of relevant semileptonic decays, which can be tested in the future experiments.

scholarly journals On the transition form factors of the axial-vector resonance f1(1285) and its decay into e+e−

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Marvin Zanke ◽  
Martin Hoferichter ◽  
Bastian Kubis
Keyword(s):  
Light Scattering ◽  
Axial Vector ◽  
Form Factors ◽  
Comprehensive Analysis ◽  
Vector Meson Dominance ◽  
Transition Form ◽  
Vector Resonance ◽  
The Impact ◽  
First Time

Abstract Estimating the contribution from axial-vector intermediate states to hadronic light-by-light scattering requires input on their transition form factors (TFFs). Due to the Landau–Yang theorem, any experiment sensitive to these TFFs needs to involve at least one virtual photon, which complicates their measurement. Phenomenologically, the situation is best for the f1(1285) resonance, for which information is available from e+e− → e+e−f1, f1 → 4π, f1 → ργ, f1 → ϕγ, and f1 → e+e−. We provide a comprehensive analysis of the f1 TFFs in the framework of vector meson dominance, including short-distance constraints, to determine to which extent the three independent TFFs can be constrained from the available experimental input — a prerequisite for improved calculations of the axial-vector contribution to hadronic light-by-light scattering. In particular, we focus on the process f1 → e+e−, evidence for which has been reported recently by SND for the first time, and discuss the impact that future improved measurements will have on the determination of the f1 TFFs.

scholarly journals Progress in the Calculation of Nucleon Transition form Factors

2016 ◽  
Vol 57 (10) ◽  
pp. 965-973 ◽  
Author(s):  
Gernot Eichmann
Keyword(s):  
Form Factors ◽  
Transition Form

A detailed analysis ofD-,D s - andB-meson transition form factors and the determination of |V cb |

1990 ◽  
Vol 48 (4) ◽  
pp. 663-671 ◽  
Author(s):  
J. G. Körner ◽  
K. Schilcher ◽  
M. Wirbel ◽  
Y. L. Wu
Keyword(s):  
Detailed Analysis ◽  
Form Factors ◽  
Transition Form
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