Thursday, August 1, 2013

1307.8122 (Robert V. Harlander et al.)

Higgs Strahlung at the Large Hadron Collider in the 2-Higgs-Doublet

Robert V. Harlander, Stefan Liebler, Tom Zirke
We present a calculation of all relevant contributions to associated production of a Higgs boson with a weak gauge boson in the 2-Higgs-Doublet Model (2HDM) at the LHC, $pp \rightarrow V\phi$, with $\phi\in\{h,H^0,A\}$ and $V\in\{W,Z\}$. While for the $W\phi$ mode, this mostly amounts to a simple rescaling of the SM cross section, the $Z\phi$ cross section depends on several 2HDM parameters. The ratio $\sigma^{W\phi}/\sigma^{Z\phi}$, for which we present the currently most complete SM prediction, therefore appears to be a sensitive probe of possible New Physics effects. We study its numerical dependence on the top and bottom Yukawa couplings. Furthermore, we consider the $W\phi/Z\phi$ ratio in exemplary 2HDM scenarios. Analogous studies for other 2HDM scenarios will become possible with an upcoming version of the program vh@nnlo which incorporates the 2HDM effects.
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