Revealing treacherous points for successful light-front phenomenological applications

Details Revealing treacherous points for successful light-front phenomenological applications Revealing treacherous points for successful light-front phenomenological applications

2005-10-16

arxiv.org/abs/hep-ph/0510210v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages; requires espcrc2.sty; to appear in the proceedings of Workshop on Light-Cone QCD and Nonperturbative Hadron Physics 2

Scientific paper

10.1016/j.nuclphysbps.2006.08.01

Light-front dynamics(LFD) plays an important role in hadron phenomenology as evidenced from recent development of generalized parton distributions and other quantities involving hadrons. For successful LFD applications to hadron phenomenology, however, treacherous points such as zero-mode contributions should be taken into account. For a concrete example of zero-mode contribution, we present Standard Model analysis of vector anomaly in the CP-even form factors of W^{\pm} gauge bosons. Main distinguished features of LFD is discussed in comparison with other Hamiltonian dynamics. We also present a power counting method to correctly pin down which hadron form factors receive the zero-mode contribution and which ones do not. Indications from our analysis to hadron phenomenology are discussed.

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