Exploring light-cone sum rules for pion and kaon form factors
Bijnens, Johan LU
and Khodjamirian, A
(2002)
In European Physical Journal C. Particles and Fields
26(1).
p.67-79
- Abstract
- We analyze the higher-twist effects and the SU(3)-flavor symmetry breaking in the correlation functions used to calculate form factors of pseudoscalar mesons in the QCD light-cone sum rule approach. It is shown that the Ward identities for these correlation functions yield relations between twist-4 two-and three-particle distribution amplitudes. In addition to the relations already obtained from the QCD equations of motions, we have found a new one. With the help of these relations, the twist-4 contribution to the light-cone sum rule for the. pion electromagnetic form factor: is reduced to a very simple form. Simultaneously, we correct a sign error in an earlier calculation. The updated light-cone sum rule prediction for the pion form... (More)
- We analyze the higher-twist effects and the SU(3)-flavor symmetry breaking in the correlation functions used to calculate form factors of pseudoscalar mesons in the QCD light-cone sum rule approach. It is shown that the Ward identities for these correlation functions yield relations between twist-4 two-and three-particle distribution amplitudes. In addition to the relations already obtained from the QCD equations of motions, we have found a new one. With the help of these relations, the twist-4 contribution to the light-cone sum rule for the. pion electromagnetic form factor: is reduced to a very simple form. Simultaneously, we correct a sign error in an earlier calculation. The updated light-cone sum rule prediction for the pion form factor at intermediate momentum transfers is compared with the recent Jefferson Lab data. Furthermore, from the correlation functions with strange-quark currents the kaon electromagnetic form factor and the K --> pi weak transition form factors are predicted with O(m(s)) similar to O(m(K)(2)) accuracy. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/321334
- author
- Bijnens, Johan
LU
and Khodjamirian, A
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C. Particles and Fields
- volume
- 26
- issue
- 1
- pages
- 67 - 79
- publisher
- Springer
- external identifiers
-
- wos:000179929000007
- scopus:0036879034
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s2002-01042-1
- language
- English
- LU publication?
- yes
- id
- 6a81657c-0329-4ed8-95ab-91e1c4a264b3 (old id 321334)
- date added to LUP
- 2016-04-01 15:43:57
- date last changed
- 2022-12-12 05:51:13
@article{6a81657c-0329-4ed8-95ab-91e1c4a264b3,
abstract = {{We analyze the higher-twist effects and the SU(3)-flavor symmetry breaking in the correlation functions used to calculate form factors of pseudoscalar mesons in the QCD light-cone sum rule approach. It is shown that the Ward identities for these correlation functions yield relations between twist-4 two-and three-particle distribution amplitudes. In addition to the relations already obtained from the QCD equations of motions, we have found a new one. With the help of these relations, the twist-4 contribution to the light-cone sum rule for the. pion electromagnetic form factor: is reduced to a very simple form. Simultaneously, we correct a sign error in an earlier calculation. The updated light-cone sum rule prediction for the pion form factor at intermediate momentum transfers is compared with the recent Jefferson Lab data. Furthermore, from the correlation functions with strange-quark currents the kaon electromagnetic form factor and the K --> pi weak transition form factors are predicted with O(m(s)) similar to O(m(K)(2)) accuracy.}},
author = {{Bijnens, Johan and Khodjamirian, A}},
issn = {{1434-6044}},
language = {{eng}},
number = {{1}},
pages = {{67--79}},
publisher = {{Springer}},
series = {{European Physical Journal C. Particles and Fields}},
title = {{Exploring light-cone sum rules for pion and kaon form factors}},
url = {{http://dx.doi.org/10.1140/epjc/s2002-01042-1}},
doi = {{10.1140/epjc/s2002-01042-1}},
volume = {{26}},
year = {{2002}},
}