کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10725440 | 1034128 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectral distribution for the decay ÏâνÏKÏ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
With the newly available data sets on hadronic Ï decays from the B-factories BaBar and BELLE, and future data from BESIII, precise information on the decay distributions will soon become available. This calls for an improvement of the decay spectra also on the theoretical side. In this work, the distribution function for the decay ÏâνÏKÏ will be presented with the relevant KÏ vector and scalar form factors being calculated in the framework of the resonance chiral theory, also taking into account additional constraints from dispersion relations and short-distances. As a by-product the slope and curvature of the vector form factor F+KÏ(s) are determined to be λ+â²=25.6Ã10â3 and λ+â³=1.31Ã10â3 respectively. From our approach it appears that it should be possible to obtain information on the low lying scalar K0â(800) as well as the second vector Kâ(1410) resonances from the Ï decay data. In particular, the exclusive branching fraction of the scalar component is found to be B[ÏâνÏ(KÏ)S-wave]=(3.88±0.19)Ã10â4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 640, Issue 4, 14 September 2006, Pages 176-181
Journal: Physics Letters B - Volume 640, Issue 4, 14 September 2006, Pages 176-181
نویسندگان
Matthias Jamin, Antonio Pich, Jorge Portolés,