3-8 July 2016
The University of Melbourne
Australia/Melbourne timezone

Precision Higgs mass predictions in minimal and non-minimal SUSY models

5 Jul 2016, 16:30
20m
Alice Hoy Room 333 ()

Alice Hoy Room 333

Talk Precision Calculations and Simulations Precision Calculations and Simulations

Speaker

Peter Athron

Description

Now that the Higgs mass has been well measured at the Large Hadron
Collider (combined ATLAS and CMS mh = 125.09 \pm 0.24) it is very
important that the precision of the Higgs mass prediction in SUSY
models is improved. This is particularly challenging since both limits
on the sparticles and the Higgs mass indicate that the SUSY scale may
be quite large. A great deal of work has recently been directed at
this in the MSSM with the state-of-the-art calculations ensuring that
large logs are resummed when the SUSY scale is much bigger than the EW
scale. However much less has been done on non-minimal SUSY
models. Currently a two-loop calculation is available with
SARAH/SPheno, but the precision is still limited due to large
logarithms when the SUSY scale is large. Here we present an
alternative algorithm for calculating the Higgs pole mass in and SUSY
theories that combines an effective field theory (EFT) approach to
resum large logs with a diagrammatic calculation of the Higgs pole
mass. We implement this algorithm in FlexibleSUSY and use this to
study the impact of these corrections in the MSSM, NMSSM, MRSSM and
E$_6$SSM. In the MSSM we show that our Higgs mass prediction correctly
interpolates between the known EFT results when the sparticles are
heavy and fixed order calculations in the full theory when the
sparticle masses are close to the electroweak scale. We compare our
results to those in public codes and discuss the origin of the most
significant deviations.

Primary author

Peter Athron

Co-authors

Alexander Voigt (Unknown-Unknown-Unknown) Dominik Stockinger (University Glasgow) Jae-hyeon Park (KIAS) Tom Steudner (TU Dresden)

Presentation Materials