scholarly journals Implication on the pion distribution amplitude from the pion-photon transition form factor with the newBABARdata

2010 ◽  
Vol 82 (3) ◽  
Author(s):  
Xing-Gang Wu ◽  
Tao Huang
Keyword(s):  
Form Factor ◽  
Transition Form Factor ◽  
Distribution Amplitude ◽  
Transition Form ◽  
Photon Transition

A COMPREHENSIVE ANALYSIS OF THE PION–PHOTON TRANSITION FORM FACTOR IN THE LEADING ORDER APPROXIMATION

2007 ◽  
Vol 22 (18) ◽  
pp. 3065-3086 ◽  
Author(s):  
TAO HUANG ◽  
XING-GANG WU
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Transition Form Factor ◽  
Order Approximation ◽  
Comprehensive Analysis ◽  
Distribution Amplitude ◽  
Leading Order ◽  
Transition Form ◽  
Photon Transition ◽  
Fock State

We perform a comprehensive analysis of the pion–photon transition form factor Fπγ(Q2) involving the transverse momentum corrections in the leading order approximation with the present CLEO experimental data, in which the contributions beyond the leading Fock state have been taken into consideration. As is well known, the leading Fock-state contribution dominates of Fπγ(Q2) at large momentum transfer (Q2) region. One should include the contributions beyond the leading Fock state in small Q2 region. In this paper, we construct a phenomenological expression to estimate the contributions beyond the leading Fock state based on its asymptotic behavior at Q2→0. Our present theoretical results agree well with the experimental data in the whole Q2 region. Then, we extract some useful information of the pionic leading twist-2 distribution amplitude (DA) by comparing our results of Fπγ(Q2) with the CLEO data. By taking best fit, we have the distribution amplitude moments, [Formula: see text] and all of higher moments, which are closed to the asymptotic-like behavior of the pion wave function.

scholarly journals Matching lightcone and anomaly-sum-rule predictions for the pion-photon transition form factor

2016 ◽  
Vol 93 (5) ◽  
Author(s):  
A. G. Oganesian ◽  
A. V. Pimikov ◽  
N. G. Stefanis ◽  
O. V. Teryaev
Keyword(s):  
Form Factor ◽  
Transition Form Factor ◽  
Transition Form ◽  
Sum Rule ◽  
Photon Transition

scholarly journals Pion-photon transition form factor in light-cone sum rules

2012 ◽  
Author(s):  
A. V. Pimikov ◽  
A. P. Bakulev ◽  
S. V. Mikhailov ◽  
N. G. Stefanis
Keyword(s):  
Form Factor ◽  
Light Cone ◽  
Transition Form Factor ◽  
Sum Rules ◽  
Transition Form ◽  
Photon Transition

scholarly journals Pion-photon transition form factor and new physics in theτsector

2012 ◽  
Vol 85 (5) ◽  
Author(s):  
David McKeen ◽  
Maxim Pospelov ◽  
J. Michael Roney
Keyword(s):  
Form Factor ◽  
Transition Form Factor ◽  
New Physics ◽  
Transition Form ◽  
Photon Transition
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