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We review recent results on hadron form factors and nucleon generalized parton distibutions obtained with dynamical lattice QCD simulations. We discuss lattice artifacts and open questions, and presen...
Scalar-isoscalar states, gravitational form factors, and dimension-2 condensates in a large-Nc Regge approach
Scalar-isoscalar states gravitational form factors dimension-2 condensates
2011/1/7
Scalar-isoscalar states are analyzed within the large-Nc Regge approach. We find that the lightest f0(600) scalar-isoscalar state fits very well into the pattern of the radial Regge trajectory. We con...
On form factors in N=4 sym
form factors N=4 sym
2010/12/23
In this paper we study the form factors for the half-BPS operators $\mathcal{O}^{(n)}_I$ and the $\mathcal{N}=4$ stress tensor supermultiplet current $W^{AB}$ up to the second order of perturbation th...
We present first results on the axial and pseudoscalar $\Delta$ form factors. The analysis is carried out in the quenched approximation where statistical errors are small and the lattice set-up can be...
Form Factors in N=4 Super Yang-Mills and Periodic Wilson Loops
N=4 Super Yang-Mills Periodic Wilson Loops
2010/12/23
We calculate form factors of half-BPS operators in N=4 super Yang-Mills theory at tree level and one loop using novel applications of recursion relations and unitarity. In particular, we determine the...
We review recent results on hadron form factors and nucleon generalized parton distibutions obtained with dynamical lattice QCD simulations. We discuss lattice artifacts and open questions, and presen...
Nucleon to Delta transition form factors with $N_F=2+1$ domain wall fermions
Nucleon Delta transition
2011/1/7
We calculate the electromagnetic, axial and pseudo-scalar form factors of the Nucleon to $\Delta(1232)$ transition using two dynamical light degenerate quarks and a dynamical strange quark simulated w...
We review recent results on hadron form factors and nucleon generalized parton distibutions obtained with dynamical lattice QCD simulations. We discuss lattice artifacts and open questions,and present...
We review recent results on hadron form factors and nucleon generalized parton distibutions obtained with dynamical lattice QCD simulations. We discuss lattice artifacts and open questions,and present...
Measurements of the γγ*→π0 and γγ*→ηc transition form factors at BABAR
two-photon interaction pseudoscalar meson transition form factor pi0 eta eta(958) etac
2010/5/7
We present measurements of the γγ*→π0 transition form factor for the momentum transfer range Q2=4—40 GeV2 and the γγ*→ηc transition form factor for the range Q2=2—50 GeV2. The current status of measur...
BABAR measurement of baryon time-like form factors via initial state radiation
baryon form factor Initial state radiation BABAR
2010/5/7
BABAR has measured with unprecedented accuracy the e+e－→pp and e+e－→ΛΛ cross sections by means of the initial state radiation technique, which has the advantages of good efficiency, good energy resolu...
Two-Photon-Exchange Contribution to Proton Form Factors in Both Space-Like and Time-Like Regions
two-photon exchange form factor proton
2010/5/7
The two two-photon exchange corrections to the unpolarized cross section and polarized observable
PT, PL in elastic ep scattering are discussed in a simple hadronic model. Comparing with previous res...
Nucleon form factors：the space-time connection
dispersion relations nucleon form factors pQCD
2010/5/7
Analyticity of nucleon form factors allows to derive sum rules which, using space-like and time-like
data as input, can give unique information about behaviors in energy regions not experimentally ac...
Valence quark contributions for the gamma N -> P11(1440) form factors
Valence quark contributions gamma N
2010/3/16
Using a covariant spectator quark model we estimate valence quark contributions to the F1*(Q2) and F2*(Q2) transition form factors for the gamma N -> P11(1440) reaction. The Roper resonance, P11(1440)...