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Cao, FG; Dai, YB; Huang, CS; Cao, FG , Massey Univ, Inst Fundamental Sci, Palmerston North, New Zealand.
Twist-3 contribution to the pion electromagnetic form factor
Source PublicationEUROPEAN PHYSICAL JOURNAL C
KeywordPerturbative Qcd Sudakov Suppression Exclusive Processes Quantum Chromodynamics Transverse-momentum Asymptotic-behavior Wave-function Applicability Scattering Amplitude
AbstractNon-leading contribution to the pion electromagnetic form factor which comes from the pion twist-3 wave function is analyzed in the modified hard scattering approach (MHSA) proposed by Li and Sterman. This contribution is enhanced significantly due to bound state effect (the twist-3 wave function is independent of the fractional momentum carried by the parton and has a large factor similar to m(pi)(2)/m(0) with m(pi) being the pion meson mass and m(0) being the mean u- and d-quark masses). Consequently, although it is suppressed by the factor 1/Q(2), the ttvist-3 contribution is comparable with and even larger than the leading twist (twist-2) contribution at intermediate energy region of Q(2) being 2 similar to 40 GeV2.
1999
ISSN1434-6044
Volume11Issue:3Pages:501-506
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13056
Collection理论物理所科研产出_SCI论文
Corresponding AuthorCao, FG , Massey Univ, Inst Fundamental Sci, Palmerston North, New Zealand.
Recommended Citation
GB/T 7714
Cao, FG,Dai, YB,Huang, CS,et al. Twist-3 contribution to the pion electromagnetic form factor[J]. EUROPEAN PHYSICAL JOURNAL C,1999,11(3):501-506.
APA Cao, FG,Dai, YB,Huang, CS,&Cao, FG , Massey Univ, Inst Fundamental Sci, Palmerston North, New Zealand..(1999).Twist-3 contribution to the pion electromagnetic form factor.EUROPEAN PHYSICAL JOURNAL C,11(3),501-506.
MLA Cao, FG,et al."Twist-3 contribution to the pion electromagnetic form factor".EUROPEAN PHYSICAL JOURNAL C 11.3(1999):501-506.
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