کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9851456 | 1527293 | 2005 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Factorization of the Q2 dependence in electroproduction of vector mesons
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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
چکیده انگلیسی
In a framework for non-perturbative QCD calculation of high energy processes, the amplitudes for photo- and electroproduction of vector mesons are written as integrals of the overlap product of photon and vector meson wave functions, multiplied by the amplitude for the scattering of qq¯ dipole pairs off the proton. For sizes of the overlap functions that are smaller than the typical ranges of the interaction of the dipoles with the proton, the amplitudes factorize in the form of integrals, here called overlap strengths, formed only with the overlap of the wave functions times the square of the dipole separation. The integration is extended over the light front coordinates describing the qq¯ dipoles. With this result, the overlap strengths contain all Q2 dependence of the observables. We show the importance of this factorization in the description of the experimental data for all S-wave vector mesons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics A - Volume 748, Issues 3â4, 21 February 2005, Pages 608-624
Journal: Nuclear Physics A - Volume 748, Issues 3â4, 21 February 2005, Pages 608-624
نویسندگان
E. Ferreira, V.L. Baltar,