کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8199999 1528958 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quark model description of quasi-elastic pion knockout from the proton at JLAB
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Quark model description of quasi-elastic pion knockout from the proton at JLAB
چکیده انگلیسی
The interference term between s- and t-pole contributions to the p(e,e′π+)n cross section is evaluated on the basis of the constituent quark model. It is shown that the contribution of baryon s-poles can be modeled by a nonlocal extension of the Kroll-Ruderman contact term. This contribution is in a destructive interference with the pion t-pole that is essential to improve the description of recent JLab data at the invariant mass W=1.95GeV. Some predictions are made for a new JLab measurement at higher values W=2.1-2.3GeV and Q2 centered at 1.6 and 2.45GeV2/c2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 634, Issues 2–3, 9 March 2006, Pages 220-226
نویسندگان
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