کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1845477 1033280 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pion form factor analysis using NLO analytic perturbation theory *
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Pion form factor analysis using NLO analytic perturbation theory *
چکیده انگلیسی

I present results for the pion's electromagnetic form factor in the spacelike region, which implement the most advanced perturbative information currently available for this observable in conjunction with a pion distribution amplitude that agrees with the CLEO data on the pion-photon transition form factor at the 1σ level. I show that using for the running strong coupling and its powers their analytic versions in the sense of Shirkov and Solovtsov, the obtained predictions become insensitive to the renormalization scheme and scale setting adopted. Joining the hard contribution with the soft part on account of local duality and respecting the Ward identity at Q2 = 0, the agreement with the available experimental data, including expectations from planned experiments at JLab, is remarkable both in trend and magnitude. I also comment on Sudakov resummation within the analytic approach.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Proceedings Supplements - Volume 152, Issue 1, February 2006, Pages 245-248