Ghost poles in the nucleon propagator: Vertex corrections and form factors

G. Krein; M. Nielsen; R. D. Puff; L. Wilets

doi:10.1103/physrevc.47.2485

Ghost poles in the nucleon propagator: Vertex corrections and form factors

Physical Review C ◽

10.1103/physrevc.47.2485 ◽

1993 ◽

Vol 47 (6) ◽

pp. 2485-2491 ◽

Cited By ~ 24

Author(s):

G. Krein ◽

M. Nielsen ◽

R. D. Puff ◽

L. Wilets

Keyword(s):

Form Factors ◽

Vertex Corrections

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Symmetry-breaking corrections to the form factors for heavy-to-heavy B-meson at large recoil

International Journal of Modern Physics A ◽

10.1142/s0217751x19500465 ◽

2019 ◽

Vol 34 (08) ◽

pp. 1950046

Author(s):

Saba Shafaq ◽

Ishtiaq Ahmed ◽

M. Jamil Aslam

Keyword(s):

Perturbation Theory ◽

Symmetry Breaking ◽

Heavy Quark ◽

B Meson ◽

Form Factors ◽

Heavy Meson ◽

Effective Theory ◽

Vertex Corrections ◽

Soft Collinear Effective Theory ◽

Heavy Quark Limit

The present study investigates the decay of B to heavy meson using the soft collinear effective theory. By assigning different loop momenta, the factorization has been tested and it is found to be valid to all orders in the perturbation theory. It is noted that theory contains one hard collinear and two soft modes depending upon virtuality of different momenta. In the next step, symmetry-conserving relations (in heavy quark limits) to the form factors have been studied. These relations are then used to parametrize the form factors to get symmetry-breaking corrections. These symmetry-breaking corrections can be calculated using perturbative (vertex corrections) as well as nonperturbative (hard spectator interactions) QCD. It is found that in the heavy quark limit, these symmetry contributions do not contribute to the form factors that appear in physical observables for the case of [Formula: see text] decays which are contrary to the heavy-to-light meson decays.

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Form Factors for Graviton–Particle Interactions

Canadian Journal of Physics ◽

10.1139/p71-225 ◽

1971 ◽

Vol 49 (14) ◽

pp. 1869-1873 ◽

Cited By ~ 1

Author(s):

M. G. Hare

Keyword(s):

Form Factors ◽

Dispersion Relations ◽

Elementary Particles ◽

Threshold Region ◽

Particle Interactions ◽

Mass Energy ◽

Vertex Corrections

Contributions to the mass-energy form factors are calculated for the graviton–nucleon and graviton–deuteron (singlet and triplet) vertex interactions using sidewise dispersion relations. These factors are useful in astrophysics for vertex corrections to graviton–particle interactions. Electromagnetic contributions are considered for all vertices, π-meson contributions for the nucleon vertex and the two nucleon breakup for the singlet deuteron vertex. The deuterons are treated as elementary particles and the threshold region is assumed to dominate the results.

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Implications of Anomalous Gauge Boson Interactions to the Fermion Electromagnetic Moments

Modern Physics Letters A ◽

10.1142/s0217732397000704 ◽

1997 ◽

Vol 12 (10) ◽

pp. 673-683

Author(s):

Luís Bento ◽

Rui Neves

Keyword(s):

Gauge Boson ◽

Form Factors ◽

Electromagnetic Form Factors ◽

Universal Form ◽

Electromagnetic Moments ◽

Vertex Corrections

We calculate the electromagnetic form factors of the fermions induced by the anomalous gauge boson interactions contained in the operators [Formula: see text] and [Formula: see text]. The interplay between vertex corrections and gauge boson self-energies is studied in order to separate the non-universal form factors. We apply the same procedure to re-analyze previous results regarding other anomalous gauge boson interactions.

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IMPACT OF γV-VERTEX CORRECTIONS ON THE ωπ0γ AND ϕπ0γ TRANSITION FORM FACTORS

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514604591 ◽

2014 ◽

Vol 35 ◽

pp. 1460459

Author(s):

SERGII RASPOPOV

Keyword(s):

Field Theory ◽

Form Factor ◽

Vector Meson ◽

Effective Field Theory ◽

Form Factors ◽

Effective Field ◽

Lepton Pair ◽

Transition Form ◽

Vertex Corrections ◽

Conversion Transition

The aim of this paper is to present an effective field theory description of the conversion transition of the vector meson V into the pseudoscalar P and the lepton-pair l+l-. The normalized form factor for ω → π0γ* transition is presented and compared to the available data and to the predictions of other models.

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