کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1853299 | 1528922 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
QCD corrections to tt¯bb¯ productions via photon-photon collisions at linear colliders
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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
![عکس صفحه اول مقاله: QCD corrections to tt¯bb¯ productions via photon-photon collisions at linear colliders QCD corrections to tt¯bb¯ productions via photon-photon collisions at linear colliders](/preview/png/1853299.png)
چکیده انگلیسی
We calculated the complete next-to-leading order (NLO) QCD corrections to the tt¯bb¯ production process at a γγ collider in the Standard Model (SM). The calculation of the one-loop QCD correction includes the evaluations of the hexagon and pentagon amplitudes. We studied the NLO QCD corrected total cross section, the distributions of transverse momenta of final top- and bottom-quark states, and the dependence of the cross section on renormalization scale μ. It shows that NLO QCD correction generally increases the LO cross section in our chosen parameter space, and the K-factor varies from 1.70 to 1.14 when colliding energy goes up from 400 GeV to 2 TeV. We find that the correction distinctly changes the distributions of transverse momenta of the final top- and bottom-quark states, and the NLO QCD correction obviously improves the independence of the cross section for process γγâtt¯bb¯ on the renormalization scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 654, Issues 1â2, 4 October 2007, Pages 13-19
Journal: Physics Letters B - Volume 654, Issues 1â2, 4 October 2007, Pages 13-19
نویسندگان
Guo Lei, Ma Wen-Gan, Han Liang, Zhang Ren-You, Jiang Yi,