Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-09-07
Phys.Rev.Lett.100:061801,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 figures, RevTex4
Scientific paper
10.1103/PhysRevLett.100.061801
We show that in the Minimal Supersymmetric Standard Model, the possibility for the lightest CP-even Higgs boson to be lighter than $Z$ boson (as low as about 60 GeV) is, contrary to the usual belief, not yet excluded by LEP2 data or any other existing experimental data. The characteristic of the light Higgs boson scenario (LHS) is that the $ZZh$ coupling and the decay branching ratio ${\rm Br}(h/A\to b\bar{b})$ are simultaneously suppressed as a result of generic supersymmetric loop corrections. Consequently, the $W^\pm H^\mp h$ coupling has to be large due to the sum rule of Higgs couplings to weak gauge bosons. In addition to discussing the potential of the Tevatron and $B$-factories to test the LHS, we show that the associate neutral and charged Higgs boson production process, $pp\to H^\pm h (A)$, can completely probe LHS at the CERN Large Hadron Collider.
Belyaev Alexander
Cao Qing-Hong
Nomura Daisuke
Tobe Kazuhiro
Yuan C.--P.
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