کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5494527 1527709 2017 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparing the Rξ gauge and the unitary gauge for the standard model: An example
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Comparing the Rξ gauge and the unitary gauge for the standard model: An example
چکیده انگلیسی
For gauge theory, the matrix element for any physical process is independent of the gauge used. However, since this is a formal statement, it does not guarantee this gauge independence in every case. An example is given here where, for a physical process in the standard model, the matrix elements calculated with two different gauge - the Rξ gauge and the unitary gauge - are explicitly verified to be different. This is accomplished by subtracting one matrix element from the other. This non-zero difference turns out to have a subtle origin. Two simple operators are found not to commute with each other: in one gauge these two operations are carried out in one order, while in the other gauge these same two operations are carried out in the opposite order. Because of this result, a series of question are raised such that the answers to these question may lead to a deeper understanding of the Yang-Mills non-Abelian gauge theory in general and the standard model in particular.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 914, January 2017, Pages 421-445
نویسندگان
, ,