Accuracy of the pion elastic form factor extracted from a local-duality sum rule
نویسندگان
چکیده
منابع مشابه
Pion form factor from local-duality QCD sum rule
We present our recent results for the pion elastic form factor [1] obtained within a local-duality three-point sum rule (a Borel sum rule in the limit of an infinite Borel parameter). Our analysis [1] includes the O(1) and O(αs) contributions and is therefore applicable in a broad range of spacelike momentum transfers. Our results demonstrate in essentially model-independent way that the O(1) t...
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The pion—its distribution amplitude and form factor—stands tall as a role model for the modern description of hadrons in terms of quarks and gluons within QCD. At high momenta Q2, the pion form factor can be written as a convolution Fπ(Q 2) = φout π ⊗ T (Q 2)⊗ φin π on account of the factorization theorem, where the symbol ⊗ means integration over the longitudinal momenta of the quark and antiq...
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The pion, and specifically its charge form factor, is of key interest in the study of the quark-gluon structure of hadrons. This is exemplified by the many calculations that treat the pion as one of their prime examples. One of the reasons is that the valence structure of the pion, being 〈qq̄〉, is relatively simple. Hence it is expected that the value of the four-momentum transfer squared Q, dow...
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ژورنال
عنوان ژورنال: Journal of Physics G: Nuclear and Particle Physics
سال: 2012
ISSN: 0954-3899,1361-6471
DOI: 10.1088/0954-3899/39/5/055007