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Higgs pair production with SUSY QCD correction: revisited under current experimental constraints | | Chengcheng Han
; Xuanting Ji
; Lei Wu
; Peiwen Wu
; Jin Min Yang
; | | Date: |
15 Jul 2013 | | Abstract: | We consider the current experimental constraints on the parameter space of
the MSSM and NMSSM. Then in the allowed parameter space we examine the Higgs
pair production at the 14 TeV LHC via $bar{b} o hh$ ($h$ is the 125 GeV
SM-like Higg boson) with one-loop SUSY QCD correction and compare it with the
production via $gg o hh$. We obtain the following observations: (i) For the
MSSM the production rate of $bar{b} o hh$ can reach 50 fb and thus can be
competitive with $gg o hh$, while for the NMSSM $bar{b} o hh$ has a much
smaller rate than $gg o hh$ due to the suppression of the $hbar{b}$
coupling by the singlet component of $h$; (ii) The SUSY-QCD correction to
$bar{b} o hh$ is sizable, which can reach 30% for the MSSM and 10% for the
NMSSM within the $1sigma$ region of the Higgs data; (iii) In the heavy SUSY
limit (all soft mass parameters become heavy), the SUSY effects decouple rather
slowly from the Higgs pair production (especially the $gg o hh$ process),
which, for $M_{
m SUSY}=5$ TeV and $m_A<1$ TeV, can enhance the production
rate by a factor of 1.5 and 1.3 for the MSSM and NMSSM, respectively. So, the
Higgs pair production at the LHC may be used to unravel the effects of heavy
sparticles in case of non-observation from direct search. | | Source: | arXiv, 1307.3790 | | Services: | Forum | Review | PDF | Favorites | |
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