https://doi.org/10.1140/epjc/s10052-014-3212-9
Regular Article - Theoretical Physics
The NUHM2 after LHC Run 1
1
High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ, UK
2
Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL, 60510, USA
3
Physics Department, University of Illinois at Chicago, Chicago, IL, 60607-7059, USA
4
Physics Department, CERN, 1211, Geneva 23, Switzerland
5
Antwerp University, 2610, Wilrijk, Belgium
6
Theory Group, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025-7090, USA
7
Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London, WC2R 2LS, UK
8
H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK
9
Instituto de Física de Cantabria (CSIC-UC), 39005, Santander, Spain
10
NIKHEF and VU University Amsterdam, Science Park 105, 1098 XG, Amsterdam, The Netherlands
11
William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA
12
DESY, Notkestraße 85, 22607, Hamburg, Germany
* e-mail: Sven.Heinemeyer@cern.ch
Received:
2
September
2014
Accepted:
1
December
2014
Published online:
17
December
2014
We make a frequentist analysis of the parameter space of the NUHM2, in which the soft supersymmetry (SUSY)-breaking contributions to the masses of the two Higgs multiplets, $$m^2_{H_{u,d}}$$, vary independently from the universal soft SUSY-breaking contributions $$m^2_0$$ to the masses of squarks and sleptons. Our analysis uses the MultiNest sampling algorithm with over $$4 \times 10^8$$ points to sample the NUHM2 parameter space. It includes the ATLAS and CMS Higgs mass measurements as well as the ATLAS search for supersymmetric jets + $${/\!\!E}_T$$ signals using the full LHC Run 1 data, the measurements of $$\mathrm{BR}(B_s \rightarrow \mu ^+\mu ^-)$$ by LHCb and CMS together with other B-physics observables, electroweak precision observables and the XENON100 and LUX searches for spin-independent dark-matter scattering. We find that the preferred regions of the NUHM2 parameter space have negative SUSY-breaking scalar masses squared at the GUT scale for squarks and sleptons, $$m_0^2 < 0$$, as well as $$m^2_{H_u} < m^2_{H_d} < 0$$. The tension present in the CMSSM and NUHM1 between the supersymmetric interpretation of $$(g-2)_\mu $$ and the absence to date of SUSY at the LHC is not significantly alleviated in the NUHM2. We find that the minimum $$\chi ^2 = 32.5$$ with 21 degrees of freedom (dof) in the NUHM2, to be compared with $$\chi ^2/\mathrm{dof} = 35.0/23$$ in the CMSSM, and $$\chi ^2/\mathrm{dof} = 32.7/22$$ in the NUHM1. We find that the one-dimensional likelihood functions for sparticle masses and other observables are similar to those found previously in the CMSSM and NUHM1.
© SIF and Springer-Verlag Berlin Heidelberg, 2014