2-9 July 2014
Valencia, Spain
Europe/Madrid timezone

Interference effects of neutral Higgs bosons in the MSSM

4 Jul 2014, 12:30
Auditorium 1 ()

Auditorium 1

Oral presentation Brout-Englert-Higgs physics BEH Physics


Ms. Elina Fuchs (DESY)


The interpretation of the Higgs signal within the MSSM requires precise theoretical predictions including mixing and higher-order effects. In case of nearby resonances in the Higgs sector, interference effects may be relevant. However, the interference term is neglected by the standard narrow-width approximation (NWA), which is in other respects a convenient tool for the factorisation of a more complicated process into production and subsequent decay of a particle with a small width compared to its mass. Hence, a generalisation of the usual NWA is analysed which allows for a consistent treatment of interference effects between nearly mass-degenerate particles. This can be useful for the application to processes for which the factorisation into different sub-processes is essential to enable the computation of higher-order contributions. Phenomenological consequences of interference effects between neutral MSSM Higgs bosons will be presented for an example process of Higgs boson production and its subsequent decay including one-loop corrections. To validate the generalised NWA, the factorised version will be compared to the calculation of the complete process at the one-loop level. Furthermore, full Higgs propagator mixing will be examined in comparison to the Breit-Wigner approximation.

Primary author

Ms. Elina Fuchs (DESY)


Prof. Georg Weiglein (DESY)

Presentation Materials


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