Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-03-16
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 8 figures
Scientific paper
We investigate the effect of one-loop corrections of ${\cal O}(\alpha_S^2\alpha_W)$ on the $t\bar t$ invariant mass spectrum at the Large Hadron Collider (LHC) in presence of both resonant and non-resonant Higgs boson effects. We show that corrections of ${\cal O}(\alpha_S^2\alpha_W)$ involving a non-resonant Higgs boson are comparable to or even larger than those involving interference with the s-channel resonant Higgs boson amplitude and that both of these are subleading with respect to all other (non-Higgs) diagrams through that order. We also compute the contribution through ${\cal O}(\alpha_S^2\alpha_W^2)$ of resonant Higgs boson production (i.e. Higgs production via $gg$ fusion) as well as the pure QCD ones of ${\cal O}(\alpha_S^3)$. Altogether, we show that the well known peak-dip structure of the $M_{t\bar t}$ spectrum emerging from interference effects between the $t,u$-channel $gg$-induced Leading Order (LO) QCD diagrams and the one due to a Higgs boson in s-channel via $gg$-fusion is drastically swamped by the remainder of the terms of ${\cal O}(\alpha_S^2\alpha_W)$ discussed above.
Moretti Sébastien
Ross David A.
No associations
LandOfFree
On the top-antitop invariant mass spectrum at the LHC from a Higgs boson signal perspective does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the top-antitop invariant mass spectrum at the LHC from a Higgs boson signal perspective, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the top-antitop invariant mass spectrum at the LHC from a Higgs boson signal perspective will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-352085