کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10722200 | 1033713 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quark mass dependence of the pion vector form factor
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Quark mass dependence of the pion vector form factor Quark mass dependence of the pion vector form factor](/preview/png/10722200.png)
چکیده انگلیسی
We examine the quark mass dependence of the pion vector form factor, particularly the curvature (mean quartic radius). We focus our study on the consequences of assuming that the coupling constant of the Ï to pions, gÏÏÏ, is largely independent of the quark mass while the quark mass dependence of the Ï mass is given by recent lattice data. By employing the Omnès representation we can provide a very clean estimate for a certain combination of the curvature and the square radius, whose quark mass dependence could be determined from lattice computations. This study provides an independent access to the quark mass dependence of the ÏÏÏ coupling and in this way a non-trivial check of the systematics of chiral extrapolations. We also provide an improved value for the curvature for physical values for the quark masses, namely ãr4ã=0.73±0.09 fm4 or equivalently cV=4.00±0.50 GeVâ4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 678, Issue 1, 6 July 2009, Pages 90-96
Journal: Physics Letters B - Volume 678, Issue 1, 6 July 2009, Pages 90-96
نویسندگان
Feng-Kun Guo, Christoph Hanhart, Felipe J. Llanes-Estrada, Ulf-G. MeiÃner,