8 research outputs found
The PDF4LHC report on PDFs and LHC data: results from Run I and preparation for Run II
Handbook of LHC Higgs Cross Sections: 1. Inclusive Observables
This Report summarizes the results of the first 10 months’ activities of the
LHC Higgs Cross Sections Working Group. The main goal of the working
group was to present the status-of-art on Higgs Physics at the LHC integrating
all new results that have appeared in the last few years.
The Report is more than a mere collection of the proceedings of the general
meetings. The subgroups have been working in different directions. An attempt
has been made to present the first Report from these subgroups in a
complete and homogeneous form. The subgroups’ contributions correspondingly
comprise the main parts of the Report. A significant amount of work has
been performed in providing higher-order corrections to the Higgs-boson cross
sections and pinning down the theoretical uncertainty of the Standard Model
predictions. This Report comprises explicit numerical results on total cross
sections, leaving the issues of event selection cuts and differential distributions
to future publications. The subjects for further study are identified
Detection prospects of light NMSSM Higgs pseudoscalar via cascades of heavier scalars from vector boson fusion and Higgs-strahlung
A detection at the large hadron collider of a light Higgs pseudoscalar would, if
interpreted in a supersymmetric framework, be a smoking gun signature of nonminimal
supersymmetry. In this work in the framework of the next-to-minimal
supersymmetric standard model we focus on vector boson fusion and Higgs-strahlung
production of heavier scalars that subsequently decay into pairs of light pseudoscalars.
We demonstrate that although these channels have in general very limited reach, they
are viable for the detection of light pseudoscalars in some parts of parameter space and
can serve as an important complementary probe to the dominant gluon-fusion
production mode. We also demonstrate that in a Higgs factory these channels may
reach sensitivities comparable to or even exceeding the gluon fusion channels at the
Large Hadron Collider, thus possibly rendering this our best option to discover a light
pseudoscalar. It is also worth mentioning that for the singlet dominated scalar this may
be the only way to measure its couplings to gauge bosons. Especially promising are
channels where the initial scalar is radiated off a W as these events have relatively high
rates and provide substantial background suppression due to leptons from the W. We
identify three benchmark points that well represent the above scenarios. Assuming that
the masses of the scalars and pseudoscalars are already measured in the gluon-fusion
channel, the event kinematics can be further constrained, hence significantly
improving detection prospects. This is especially important in the Higgs-strahlung
channels with rather heavy scalars, and results in possible detection at 200 fb for the
most favoured parts of the parameter spac