FORM-FACTORS
Review of recent measurements of meson and hyperon form factors
... two vector resonances of charmonium to leptons (via a photon) and hadrons (via gluons) are identical, because both are proportional to the wave functions at the origin. This relation was successfully used by us recently ...
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Finite temperature correlation functions from form factors
... contribution due to the non-unitarity of the model. As expected, similar to the (T = 0, m 6 = 0)-case, carried out in [26], we observe an extremely fast convergence of the series towards the expected value (4.6). The ...
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Electromagnetic form factors of nucleon resonances from CLAS
... double meson production were measured in CLAS, see Ref. [5] for details. The CLAS Physics Database [6] contains data files with all measured observables. In order to extract the electromagnetic transition form ...
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Form factors of integrable Heisenberg (higher) spin chains
... compute form factors and correlation functions of quantum spin chains of infinite length (and in their massive regime) by expressing them in terms of traces of q-deformed vertex operators over an ...
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Form Factors of the Elementary Field in the Bullough-Dodd Model
... all form factors of the elementary field ϕ(x) with an even number of external legs vanish, whereas the odd ones coincide with those of the Sinh-Gordon theory at λ = 2 √ ...
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Scalar isoscalar form factors for energies above 1 GeV
... and form factors, which is consistent with high-accuracy dispersive representations at low energies but at the same time allows for a data description of higher mass res- onances such as the f 0 (1500) and ...
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Form factors of the homogeneous sine-Gordon models
... between the tricritical Ising and the critical Ising model as analysed in [11]. How- ever, there is an important conceptual difference since we view the expressions (8) as describing the scattering of massive particles. ...
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Dispersive analysis of light-meson transition form factors
... on-shell form factors and scattering amplitudes, hence observables that can to a large extent again be related to experimentally accessible quantities ...such form factors and scattering ...
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Electromagnetic transition form factors of baryons in a relativistic Faddeev approach
... baryon form factors, and hereby especially on the transition form ...the form factors — are quite involved, and correspondingly over the last decades many detailed descriptions of such ...
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Bs → Kℓv form factors with 2+1 flavors
... Figure 3. Chiral-continuum fit to the lattice form factors. These form factors are blinded, i.e., the person doing the analysis is given the current renormalizations, but they have been ...
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Form factors and related quantities in clothed-particle representation
... Abstract. We show new applications of the notion of clothed particles in quantum field theory. Its realization by means of the clothing procedure put forward by Greenberg and Schweber allows one to express the total ...
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Charge symmetry violation in the electromagnetic form factors of the nucleon
... electroweak form factors of the nu- cleon. These ‘strange form factors’ have been the focus of intensive experimental and theoretical effort for the past two decades ...electromagnetic ...
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Gamma-gamma physics and meson transition form factors
... It is now clear that direct searches for new particles at the high-energy accelerators must be complemented by low-energy high-precision measurements. One very promising observable is the muon anomalous magnetic moment ...
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BESIII results on time-like baryon form factors
... BESIII is an excellent laboratory for the measurement of baryon time-like form factors. Both ISR and scan methods can be performed, and the kinematical threshold for different baryon pair productions is ...
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γγ Physics and Transition Form Factors with KLOE/KLOE2
... Transition Form Factors (TFFs) of pseudo-scalar mesons both in time-like and space-like regions of momentum transfer has been of interest in KLOE-2 and also a main item in the KLOE-2 physics program ...
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Baryon Form Factors at BESIII
... are assumed to be real, but the time-like form factors can be complex. At low momentum transfer, space-like FFs provide information on the distributions of the electric charges and magnetization within the ...
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Mutually local fields from form factors
... the form factors are generated in a non-trivial Wick contraction procedure, whereas when doing the same with (25) the Wick contractions will be ...the form factors F O|µ 1 ...
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Measurement of hadron form factors at BESIII
... Hadrons are not point-like. Their spatial extension has been studied e.g. in electron nucleon scattering since the 1960s, and it is still a topic of interest as manifested in the proton ra- dius puzzle [1]. In addition ...
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Determination of the Strange Nucleon Form Factors
... tors with lattice QCD determinations of the connected (or ‘valence’ quark) contributions to deduce the discon- nected (or ‘sea’ quark) components [22]. This method has been applied previously to determine the strange ...
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Towards a dispersive determination of the η and η′ transition form factors
... such form factors and scattering amplitudes can in turn also be analyzed using dispersion theory: they are reconstructed from their discontinuities or imaginary parts, whose most important contributions are ...
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