کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8191537 | 1528865 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Complete electroweak corrections to Higgs production in a Standard Model with four generations at the LHC
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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
Complete electroweak two-loop corrections to the process ggâH are presented and discussed in a Standard Model with a fourth generation of heavy fermions. The latter is studied at the LHC to put exclusion limits on a fourth generation of heavy fermions. Therefore also a precise knowledge of the electroweak (EW) next-to-leading-order (NLO) corrections is important. The corrections due to the fourth generation are positive and large for a light Higgs boson, positive but relatively small around the t¯-t threshold and start to become negative for a Higgs boson mass around MH=450GeV. Increasing further the value of the Higgs boson mass, the EW NLO effects tend to become huge and negative, O(â100%), around the heavy-fermion threshold, assumed at 1.2TeV, so that gg-fusion becomes non-perturbative. Above that threshold they start to grow again and become positive around MH=1.75TeV. The behavior at even larger values of MH shows a positive enhancement, O(+100%) at MH=3TeV.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 706, Issues 2â3, 6 December 2011, Pages 195-199
Journal: Physics Letters B - Volume 706, Issues 2â3, 6 December 2011, Pages 195-199
نویسندگان
Giampiero Passarino, Christian Sturm, Sandro Uccirati,