Resonance--Continuum Interference in Light Higgs Boson Production at a Photon Collider

Details Resonance--Continuum Interference in Light Higgs Boson Production at a Photon Collider Resonance--Continuum Interference in Light Higgs Boson Production at a Photon Collider

2008-12-19

arxiv.org/abs/0812.3712v2

Phys.Rev.D79:033002,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 4 figures; added references

Scientific paper

10.1103/PhysRevD.79.033002

We study the effect of interference between the Standard Model Higgs boson resonance and the continuum background in the process gamma gamma -> H -> b b-bar at a photon collider. Taking into account virtual gluon exchange between the final-state quarks, we calculate the leading corrections to the height of the resonance for the case of a light (m_H < 160 GeV) Higgs boson. We find that the interference is destructive and around 0.1--0.2% of the peak height, depending on the mass of the Higgs and the scattering angle. This suppression is smaller by an order of magnitude than the anticipated experimental accuracy at a photon collider. However, the fractional suppression can be significantly larger if the Higgs coupling to b quarks is increased by physics beyond the Standard Model.

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