The CMSSM and NUHM1 after LHC Run 1

O. Buchmueller; R. Cavanaugh; A. De Roeck; M. J. Dolan; J. R. Ellis; H. Flächer; S. Heinemeyer; G. Isidori; J. Marrouche; D. Martínez Santos; K. A. Olive; S. Rogerson; F. J. Ronga; K. J. de Vries; G. Weiglein

doi:10.1140/epjc/s10052-014-2922-3

2024 Impact factor 4.8

Particles and Fields

Open Access

Eur. Phys. J. C (2014) 74: 2922
https://doi.org/10.1140/epjc/s10052-014-2922-3

Regular Article - Theoretical Physics

The CMSSM and NUHM1 after LHC Run 1

O. Buchmueller¹, R. Cavanaugh²^,3, A. De Roeck⁴^,5, M. J. Dolan⁶^*, J. R. Ellis⁴^,7, H. Flächer⁸, S. Heinemeyer⁹, G. Isidori⁴^,10, J. Marrouche¹, D. Martínez Santos¹¹, K. A. Olive¹², S. Rogerson¹, F. J. Ronga¹³, K. J. de Vries¹ and G. Weiglein¹⁴

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 , Geneve 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 INFN, Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044 , Frascati, Italy
¹¹ NIKHEF and VU University Amsterdam, Science Park 105, 1098 XG , Amsterdam, The Netherlands
¹² William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA
¹³ Institute for Particle Physics, ETH Zürich, 8093 , Zurich, Switzerland
¹⁴ DESY, Notkestrasse 85, 22607 , Hamburg, Germany

^* e-mail: maitiu.o.dolain@gmail.com

Received: 8 January 2014
Accepted: 26 May 2014
Published online: 13 June 2014

Abstract

We analyze the impact of data from the full Run 1 of the LHC at 7 and 8 TeV on the CMSSM with $\mu > 0$ and $$<0$$ and the NUHM1 with $\mu > 0$ , incorporating the constraints imposed by other experiments such as precision electroweak measurements, flavour measurements, the cosmological density of cold dark matter and the direct search for the scattering of dark matter particles in the LUX experiment. We use the following results from the LHC experiments: ATLAS searches for events with ${E\!\!/}_{T}$ accompanied by jets with the full 7 and 8 TeV data, the ATLAS and CMS measurements of the mass of the Higgs boson, the CMS searches for heavy neutral Higgs bosons and a combination of the LHCb and CMS measurements of $\mathrm{BR}(B_s \rightarrow \mu ^+\mu ^-)$ and $\mathrm{BR}(B_d \rightarrow \mu ^+\mu ^-)$ . Our results are based on samplings of the parameter spaces of the CMSSM for both $\mu >0$ and $\mu <0$ and of the NUHM1 for $\mu > 0$ with 6.8 $\times 10^6$ , 6.2 $\times 10^6$ and 1.6 $\times 10^7$ points, respectively, obtained using the MultiNest tool. The impact of the Higgs-mass constraint is assessed using FeynHiggs 2.10.0, which provides an improved prediction for the masses of the MSSM Higgs bosons in the region of heavy squark masses. It yields in general larger values of $$M_h$$ than previous versions of FeynHiggs, reducing the pressure on the CMSSM and NUHM1. We find that the global $\chi ^2$ functions for the supersymmetric models vary slowly over most of the parameter spaces allowed by the Higgs-mass and the ${E\!\!/}_{T}$ searches, with best-fit values that are comparable to the $\chi ^2/\mathrm{dof}$ for the best Standard Model fit. We provide 95 % CL lower limits on the masses of various sparticles and assess the prospects for observing them during Run 2 of the LHC.