کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8193767 1528885 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
τ→πππντ decays and the a1(1260) off-shell width revisited
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
τ→πππντ decays and the a1(1260) off-shell width revisited
چکیده انگلیسی
The τ→πππντ decay is driven by the hadronization of the axial-vector current. Within the resonance chiral theory, and considering the large-NC expansion, this process has been studied in Ref. [1] (D. Gómez Dumm, A. Pich, J. Portolés, 2004). In the light of later developments we revise here this previous work by including a new off-shell width for the lightest a1 resonance that provides a good description of the τ→πππντ spectrum and branching ratio. We also consider the role of the ρ(1450) resonance in these observables. Thus we bring in an overall description of the τ→πππντ process in excellent agreement with our present experimental knowledge.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 685, Issues 2–3, 1 March 2010, Pages 158-164
نویسندگان
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