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2015

Light Charged Higgs Bosons to AW/HW via Top Decay

Kling, Felix, Pyarelal, Adarsh, Su, Shufang

Understand

While current ATLAS and CMS measurements exclude a light charged Higgs ($m_{H^\pm}<160$ GeV) for most of the parameter region in the context of the MSSM scenarios, these bounds are significantly weakened in the Type II 2HDM once the exotic decay channel into a lighter neutral Higgs, $H^\pm \to AW/HW$, is open.

In this study, we examine the possibility of a light charged Higgs produced in top decay via single top or top pair production, with the subsequent decay $H^\pm \rightarrow AW/HW$, which can reach a sizable branching fraction at low $\tan\beta$ once it is kinematically permitted.
With a detailed collider analysis, we obtain exclusion and discovery bounds for the 14 TeV LHC assuming the existence of a 70 GeV neutral scalar.
Assuming ${\rm BR}(H^\pm \rightarrow AW/HW)=100\%$ and ${\rm BR}(A/H \rightarrow \tau\tau)=8.6\%$, the 95% exclusion limits on ${\rm BR}(t \rightarrow H^+ b)$ are about 0.2% and 0.03% for single top and top pair production respectively, with an integrated luminosity of 300 ${\rm fb}^{-1}$.

Built on

B. Coleppa, F. Kling and S. Su, JHEP 1409
Original
1922
Earlier work this paper cites.
H.E. Haber, G.L. Kane and T. Sterling, Nucl. Phys. B161
1979
Earlier work this paper cites.
J.F. Donoghue and L.F. Li, Phys. Rev. D19
1979
Earlier work this paper cites.
L.J. Hall and M.B. Wise, Nucl. Phys. B187
1981
Earlier work this paper cites.
H. P. Nilles, Phys. Rept. 110
1984
Earlier work this paper cites.
H. E. Haber and G. L. Kane, Phys. Rept. 117
1985
Earlier work this paper cites.
R. Barbieri, Riv. Nuovo Cim. 11N4
1988
Earlier work this paper cites.
J. R. Ellis, J. F. Gunion, H. E. Haber, L. Roszkowski and F. Zwirner, Phys. Rev. D 39
1989
Earlier work this paper cites.
M. Drees, Int. J. Mod. Phys. A 4
1989
Earlier work this paper cites.
N. D. Christensen, T. Han, Z. Liu and S. Su, JHEP 1308
Original
1999
Earlier work this paper cites.
J. F. Gunion, H. E. Haber, G. L. Kane and S. Dawson, Front. Phys. 80
2000
Earlier work this paper cites.
T. Sjostrand, S. Mrenna and P. Skands, JHEP 0605
2006
Earlier work this paper cites.
D. Eriksson, J. Rathsman and O. Stal, Comput. Phys. Commun. 181
Original
2010
Earlier work this paper cites.