Higgs-Boson Decays: Updates

In this contribution, new developments for the Standard Model Higgs-boson decays will be summarized. This addresses extensions of the grids used by Hdecay to implement finite NLO mass effects for H\to gg <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>H</mml:mi> <mml:mo>→</mml:mo> <mml:mi>g</mml:mi> <mml:mi>g</mml:mi> </mml:mrow> </mml:math> as well as explicit numbers for the branching fraction for the strange-Yukawa induced part of H\to s\bar s <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>H</mml:mi> <mml:mo>→</mml:mo> <mml:mi>s</mml:mi> <mml:mover> <mml:mi>s</mml:mi> <mml:mo accent="true">‾</mml:mo> </mml:mover> </mml:mrow> </mml:math> together with the related uncertainties. In addition, first results of the strong and weak Dalitz decays of the Higgs-boson decays H\to s\bar s + g/\gamma <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>H</mml:mi> <mml:mo>→</mml:mo> <mml:mi>s</mml:mi> <mml:mover> <mml:mi>s</mml:mi> <mml:mo accent="true">‾</mml:mo> </mml:mover> <mml:mo>+</mml:mo> <mml:mi>g</mml:mi> <mml:mi>/</mml:mi> <mml:mi>γ</mml:mi> </mml:mrow> </mml:math> are presented. The Dalitz decays define the separation between the Yukawa-induced part and the continuum, that is not induced by the strange-Yukawa coupling, and thus pave the way towards a solid determination of the strange-Yukawa coupling at future e^+e^- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:mrow> </mml:math> colliders, but will also be relevant for solid bounds on the strange-Yukawa coupling at the LHC.