scholarly journals I=2 Two-Pion Wave Function with Non-zero Total Momentum

2008 ◽  
Author(s):  
Kiyoshi Sasaki
Keyword(s):  
Wave Function ◽  
Total Momentum ◽  
Pion Wave Function

The decay π0→γγ and the pion wave function

1991 ◽  
Vol 255 (1) ◽  
pp. 117-119 ◽  
Author(s):  
A.A. Pivovarov
Keyword(s):  
Wave Function ◽  
Pion Wave Function

scholarly journals PION FORM FACTORS AT INTERMEDIATE MOMENTUM TRANSFER IN A COVARIANT APPROACH

1996 ◽  
Vol 11 (04) ◽  
pp. 655-675 ◽  
Author(s):  
ADAM SZCZEPANIAK ◽  
ANTHONY G. WILLIAMS
Keyword(s):  
Wave Function ◽  
Form Factor ◽  
Momentum Transfer ◽  
Transition Form Factor ◽  
Form Factors ◽  
Transition Form ◽  
Gauge Invariant ◽  
Pion Wave Function ◽  
Covariant Gauge ◽  
Text Component

We study the pion electromagnetic and γ*+π0→γ transition form factors at intermediate momentum transfer. We calculate soft, nonperturbative corrections to the leading perturbative amplitudes which arise from the [Formula: see text] component of the pion wave function. We work in Minkowski space and use a Lorentz-covariant, gauge-invariant generalized perturbative integral representation for the [Formula: see text] amplitudes. For the transition form factor we find relative insensitivity to the detailed nonperturbative structure of the wave function for |q2|≳10 GeV 2, whereas considerable sensitivity is found for the electromagnetic form factor.

scholarly journals Pion Scattering Length from Two-Pion Wave Function

2005 ◽  
Vol 140 ◽  
pp. 305-307 ◽  
Author(s):  
S. Aoki ◽  
M. Fukugita ◽  
K-I. Ishikawa ◽  
N. Ishizuka ◽  
Y. Iwasaki ◽  
...  
Keyword(s):  
Wave Function ◽  
Scattering Length ◽  
Pion Scattering ◽  
Pion Wave Function

scholarly journals HIGHER TWIST EFFECTS IN PHOTON–PHOTON COLLISIONS

2008 ◽  
Vol 17 (06) ◽  
pp. 1041-1059 ◽  
Author(s):  
A. I. AHMADOV ◽  
I. BOZTOSUN ◽  
A. SOYLU ◽  
E. A. DADASHOV
Keyword(s):  
Wave Function ◽  
Cross Section ◽  
Cross Sections ◽  
Production Cross ◽  
Wave Functions ◽  
Feynman Diagrams ◽  
High Twist ◽  
Higher Twist Effects ◽  
Two Photon ◽  
Pion Wave Function

In this article, we investigate the contribution of the high twist Feynman diagrams to the large-pT single pseudoscalar and vector mesons inclusive production cross section in two-photon collisions and we present the general formulae for the high and leading twist differential cross sections. The pion wave function where two non-trivial Gegenbauer coefficients a2 and a4 have been extracted from the CLEO data, Braun–Filyanov pion wave function, the asymptotic and the Chernyak–Zhitnitsky wave functions are all used in the calculations. For ρ-meson we used the Ball–Braun wave function. The results of the calculations reveal that the high twist cross sections, the ratio R, the dependence transverse momentum pT and the rapidity y of meson in the Φ CLEO (x, Q2) wave function case is very close to the Φ asy (x) asymptotic wave function case. It is shown that the high twist contribution to the cross section depends on the choice of the meson wave functions.

scholarly journals The pion wave function in covariant light-front dynamics

2011 ◽  
Vol 47 (2) ◽  
Author(s):  
O. Leitner ◽  
J. -F. Mathiot ◽  
N. A. Tsirova
Keyword(s):  
Wave Function ◽  
Light Front ◽  
Pion Wave Function ◽  
Front Dynamics

Two-loop contribution to the evolution of the pion wave function

1984 ◽  
Vol 134 (5) ◽  
pp. 359-362 ◽  
Author(s):  
F.-M. Dittes ◽  
A.V. Radyushkin
Keyword(s):  
Wave Function ◽  
Loop Contribution ◽  
Pion Wave Function
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