کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1843237 1645169 2006 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Instantons in lepton pair production
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Instantons in lepton pair production
چکیده انگلیسی
We consider QCD instanton-induced contributions to lepton pair production in hadron-hadron collisions. We relate these contributions to those known from deep inelastic scattering and demonstrate that they can be calculated reliably for sufficiently large momentum transfer. We observe that the instanton contribution to the angular distribution of the lepton pairs at finite momentum transfer strongly violates the Lam-Tung relation-a relation between coefficient functions of the angular distribution which is valid within the framework of ordinary perturbation theory. The drastic violation of this relation, as seen in experimental data, might be related to such instanton-induced effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 754, Issues 1–2, 16 October 2006, Pages 107-126
نویسندگان
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