کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10725862 1034246 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comment on “Gauge invariance and kT-factorization of exclusive processes” [arXiv:0807.0296]
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Comment on “Gauge invariance and kT-factorization of exclusive processes” [arXiv:0807.0296]
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 674, Issue 3, 20 April 2009, Pages 182-187
نویسندگان
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