Light-Cone Sum Rules for the Nucleon Form Factors
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چکیده
We argue that soft non-factorisable terms give a significant contribution to the baryon form factors at intermediate momentum transfers and set up a framework for the calculation of such terms in the light-cone sum rule approach. Among them, contributions of three-quark states with different helicity structure compared to the leading twist prove to be the most important. The leading-order sum rules are derived and confronted with the experimental data. Submitted to Physical Review D PACS numbers: 12.38.-t, 14.20.Dh, 13.40.Gp
منابع مشابه
Semileptonic b;c to nucleon transitions in full QCD at light cone
K. Azizi,* M. Bayar, Y. Sarac, and H. Sundu2,x Physics Division, Faculty of Arts and Sciences, Doğuş University, Ac badem-Kad köy, 34722 Istanbul, Turkey Department of Physics, Kocaeli University, 41380 Izmit, Turkey Electrical and Electronics Engineering Department, Atilim University, 06836 Ankara, Turkey (Received 12 August 2009; published 30 November 2009) The tree-level semileptonic b ! pl ...
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تاریخ انتشار 2008