کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8187295 | 1528782 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isoscalar single-pion production in the region of Roper and dâ(2380) resonances
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Isoscalar single-pion production in the region of Roper and dâ(2380) resonances Isoscalar single-pion production in the region of Roper and dâ(2380) resonances](/preview/png/8187295.png)
چکیده انگلیسی
Exclusive measurements of the quasi-free pnâppÏâ and ppâppÏ0 reactions have been performed by means of pd collisions at Tp=1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region Tp=0.95-1.3GeV (s=2.3-2.46 GeV), which includes the regions of Î(1232), Nâ(1440) and dâ(2380) resonance excitations. From these measurements the isoscalar single-pion production has been extracted, for which data existed so far only below Tp=1 GeV. We observe a substantial increase of this cross section around 1 GeV, which can be related to the Roper resonance Nâ(1440), the strength of which shows up isolated from the Î resonance in the isoscalar (NÏ)I=0 invariant-mass spectrum. No evidence for a decay of the dibaryon resonance dâ(2380) into the isoscalar (NNÏ)I=0 channel is found. An upper limit of 180 μb (90% C.L.) corresponding to a branching ratio of 9% has been deduced.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 774, 10 November 2017, Pages 599-607
Journal: Physics Letters B - Volume 774, 10 November 2017, Pages 599-607