Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-09
Phys.Rev.D82:095009,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 6 figures. Accepted for publication in Phys. ReV. D
Scientific paper
10.1103/PhysRevD.82.095009
In the framework of the simplest little Higgs model (SLHM), we perform a comprehensive study for the pair productions of the pseudoscalar boson {\eta} and SM-like Higgs boson h at LHC, namely gg(b\bar{b})-> {\eta}{\eta}, gg(q\bar{q})-> {\eta}h and gg(b\bar{b})-> hh. These production processes provide a way to probe the couplings between Higgs bosons. We find that the cross section of gg-> {\eta}{\eta} always dominates over that of b\bar{b}-> {\eta}{\eta}. When the Higgs boson h which mediates these two processes is on-shell, their cross sections can reach several thousand $fb$ and several hundred $fb$, respectively. When the intermediate state h is off-shell, those two cross sections are reduced by two orders of magnitude, respectively. The cross sections of gg-> {\eta}h and q\bar{q}-> {\eta}h are about in the same order of magnitude, which can reach $\ord{(10^2fb)}$ for a light {\eta} boson. Besides, compared with the SM prediction, the cross section of a pair of SM-like Higgs bosons production at LHC can be enhanced sizably. Finally, we briefly discuss the observable signatures of {\eta}{\eta}, {\eta}h and hh at the LHC, respectively.
Han Xiao-Fang
Wang Lei
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