PROOF OF COMPARABLE K-PAIR AND π-PAIR PRODUCTION FROM TIME-LIKE PHOTONS OF 1.5, 1.6, AND 1.7 GeV AND DETERMINATION OF THE K-MESON ELECTROMAGNETIC FORM FACTOR

We use the QCD pomeron model proposed by Landshoff and Nachtmann to compute the differential and the total cross-sections for pp scattering in order to discuss a QCD-based approach to the proton form factor. This model is quite dependent on the experimental electromagnetic form factor, and it is not totally clear why this form factor gives good results even at moderate transferred momentum. We exchange the electromagnetic form factor by the asymptotic QCD proton form factor determined by Brodsky and Lepage (BL) plus a prescription for its low energy behavior dictated by the existence of a dynamically generated gluon mass. We fit the data with this QCD inspired form factor and a value for the dynamical gluon mass consistent with the ones determined in the literature. Our results also provide a determination of the proton wave function at the origin, which appears in the BL form factor.

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Implications of the recent high statistics determination of the pion electromagnetic form factor in the timelike region

Physical Review D ◽

10.1103/physrevd.83.096002 ◽

2011 ◽

Vol 83 (9) ◽

Cited By ~ 14

Author(s):

B. Ananthanarayan ◽

Irinel Caprini ◽

I. Sentitemsu Imsong

Keyword(s):

Form Factor ◽

Electromagnetic Form Factor ◽

Pion Electromagnetic Form Factor ◽

Timelike Region ◽

Pion Electromagnetic Form

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Precise determination of the electromagnetic form factor of the proton in the time-like region up to s = 4.2 GeV2

Physics Letters B ◽

10.1016/0370-2693(91)91929-p ◽

1991 ◽

Vol 257 (3-4) ◽

pp. 514-518 ◽

Cited By ~ 29

Author(s):

G. Bardin ◽

G. Burgun ◽

R. Calabrese ◽

G. Capon ◽

R. Carlin ◽

...

Keyword(s):

Form Factor ◽

Electromagnetic Form Factor ◽

Precise Determination

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CALCULATION OF THE K-MESON FORM FACTOR BY MEANS OF THE PRINCIPAL VALUE METHOD

Modern Physics Letters A ◽

10.1142/s0217732395002167 ◽

1995 ◽

Vol 10 (27) ◽

pp. 2009-2017 ◽

Cited By ~ 10

Author(s):

SHAHIN S. AGAEV

Keyword(s):

Wave Function ◽

Form Factor ◽

Electromagnetic Form Factor ◽

Sum Rules ◽

Coupling Constant ◽

K Meson ◽

Running Coupling ◽

Running Coupling Constant ◽

Principal Value

The K-meson electromagnetic form factor FK(Q2) is calculated by using the principal value method, which allows one to regulate endpoint ir singularities of QCD running coupling constant αS(Q2xy) (αS(Q2(1−x)(1−y))) in the soft x→0, y→0(x→1, y→1) region by expressing it in terms of the αS(Q2). In calculations the K-meson sum rules wave function is used.

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Electromagnetic Form Factor of Doubly-Strange Hyperon

Symmetry ◽

10.3390/sym14010065 ◽

2022 ◽

Vol 14 (1) ◽

pp. 65

Author(s):

Xiongfei Wang ◽

Guangshun Huang

Keyword(s):

Form Factor ◽

Standard Model ◽

Pair Production ◽

Theoretical Investigation ◽

Electromagnetic Form Factor ◽

Particle Physics ◽

Form Factors ◽

Electromagnetic Form Factors ◽

The Standard Model ◽

Quark Models

The standard model of particle physics is a well-tested theoretical framework, but there are still some issues that deserve experimental and theoretical investigation. The Ξ resonances with strangeness S=−2, the so-called doubly-strange hyperon, can provide important information to further test the standard model by studying their electromagnetic form factors, such as probing the limitation of the quark models and spotting unrevealed aspects of the QCD description of the structure of hadron resonances. In this work, we review some recent studies of the electromagnetic form factors on doubly-strange hyperons in pair production from positron–electron annihilation experiment.

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