کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5495190 | 1528791 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nondiffractive feature of γN â Ï±N with Ï-meson electromagnetic multipole moments
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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
We investigate photoproduction of charged Ï off the nucleon using Ï(770)+Ï(140) Regge pole exchanges by considering the Ï-meson electromagnetic multipole moments. The significance of the Ward identity at the γÏÏ vertex is emphasized for current conservation in the process. Given Ï exchange with the well-known coupling constants for γÏÏ and ÏNN, we analyze the role of the Ï exchange in the γpâÏ+n and γnâÏâp processes without model-dependences except for the magnetic moment μϱ=±2.01 and electric quadrupole moment Qϱ=±0.027fm2 taken from theoretical estimates. The nondiffractive feature of both cross sections is reproduced with a rapid decrease beyond the resonance region by the dominance of Ï exchange over the Ï. Cross sections for differential and density matrix elements are presented to compare with existing data. The parity and photon polarization asymmetries are predicted to demonstrate the apparent roles of the Ï-meson electromagnetic multipole moments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 765, 10 February 2017, Pages 221-225
Journal: Physics Letters B - Volume 765, 10 February 2017, Pages 221-225
نویسندگان
Byung-Geel Yu, Kook-Jin Kong,