کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5495049 | 1528790 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evidence for Î(2200)7/2â from photoproduction and consequence for chiral-symmetry restoration at high mass
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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: Evidence for Î(2200)7/2â from photoproduction and consequence for chiral-symmetry restoration at high mass Evidence for Î(2200)7/2â from photoproduction and consequence for chiral-symmetry restoration at high mass](/preview/png/5495049.png)
چکیده انگلیسی
We report a partial-wave analysis of new data on the double-polarization variable E for the reactions γpâÏ+n and γpâÏ0p and of further data published earlier. The analysis within the Bonn-Gatchina (BnGa) formalism reveals evidence for a poorly known baryon resonance, the one-star Î(2200)7/2â. This is the lowest-mass Îâ resonance with spin-parity JP=7/2â. Its mass is significantly higher than the mass of its parity partner Î(1950)7/2+ which is the lowest-mass Îâ resonance with spin-parity JP=7/2+. It has been suggested that chiral symmetry might be restored in the high-mass region of hadron excitations, and that these two resonances should be degenerate in mass. Our findings are in conflict with this prediction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 766, 10 March 2017, Pages 357-361
Journal: Physics Letters B - Volume 766, 10 March 2017, Pages 357-361
نویسندگان
A.V. Anisovich, V. Burkert, J. Hartmann, E. Klempt, V.A. Nikonov, E. Pasyuk, A.V. Sarantsev, S. Strauch, U. Thoma,