کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9854834 | 1527846 | 2005 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Higher-order corrections in threshold resummation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Higher-order corrections in threshold resummation Higher-order corrections in threshold resummation](/preview/png/9854834.png)
چکیده انگلیسی
We extend the threshold resummation exponents GN in Mellin-N space to the fourth logarithmic (N3LL) order collecting the terms αs2(αslnN)n to all orders in the strong coupling constant αs. Comparing the results to our previous three-loop calculations for deep-inelastic scattering (DIS), we derive the universal coefficients Bq and Bg governing the final-state jet functions to order αs3, extending the previous quark and gluon results by one and two orders. A curious relation is found at second order between these quantities, the splitting functions and the large-angle soft emissions in Drell-Yan type processes. We study the numerical effect of the N3LL corrections using both the fully exponentiated form and the expansion of the coefficient function in towers of logarithms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 726, Issues 1â2, 17 October 2005, Pages 317-335
Journal: Nuclear Physics B - Volume 726, Issues 1â2, 17 October 2005, Pages 317-335
نویسندگان
S. Moch, J.A.M. Vermaseren, A. Vogt,