ミシマ　サトシ   MISHIMA Satoshi   三島　智    所属   埼玉医科大学  医学部 教養教育    職種   専任講師
論文種別	学術雑誌(原著)
言語種別	英語
査読の有無	査読あり
表題	Comment on `Gauge invariance and kT-factorization of exclusive processes'
掲載誌名	正式名：Physics Letters B
巻・号・頁	674,182-187頁
著者・共著者	Hsiang-nan Li,Satoshi Mishima
発行年月	2009/04/20
概要	We point out mistakes made in the one-loop calculation of some diagrams for the process πγ∗→γ in the preprint arXiv:0807.0296, and present correct results. Especially, we have difficulty to understand their argument that a highly off-shell gluon generates a light-cone (infrared) singularity. It is shown by means of the Ward identity that the gauge-dependent light-cone singularity found in arXiv:0807.0296 does not exist. It is then shown that a hard kernel derived in the kT factorization of exclusive processes is gauge invariant and free of the light-cone singularity.
DOI	10.1016/j.physletb.2009.03.015
arXiv ID	arXiv:0808.1526
ORCIDのPut Code	71016404
PermalinkURL	http://inspirehep.net/record/792879