Eur. Phys. J. C (2015) 75: 422
https://doi.org/10.1140/epjc/s10052-015-3599-y

Regular Article - Theoretical Physics

The pMSSM10 after LHC run 1

¹ High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ, UK
² DESY, Notkestraße 85, 22607, Hamburg, Germany
³ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL, 60510, USA
⁴ Physics Department, University of Illinois at Chicago, Chicago, IL, 60607-7059, USA
⁵ Physics Department, CERN, 1211, Geneva 23, Switzerland
⁶ Antwerp University, 2610, Wilrijk, Belgium
⁷ Theory Group, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025-7090, USA
⁸ ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, University of Melbourne, Melbourne, 3010, Australia
⁹ Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London, WC2R 2LS, UK
¹⁰ H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, UK
¹¹ Instituto de Física de Cantabria (CSIC-UC), 39005, Santander, Spain
¹² Physik-Institut, Universität Zürich, 8057, Zurich, Switzerland
¹³ Nikhef National Institute for Subatomic Physics, VU University Amsterdam, Amsterdam, The Netherlands
¹⁴ Universidade de Santiago de Compostela, 15706, Santiago de Compostela, Spain
¹⁵ William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA

^* e-mail: Sven.Heinemeyer@cern.ch

Received: 19 April 2015
Accepted: 4 August 2015
Published online: 15 September 2015

Abstract

We present a frequentist analysis of the parameter space of the pMSSM10, in which the following ten soft SUSY-breaking parameters are specified independently at the mean scalar top mass scale : the gaugino masses , the first-and second-generation squark masses , the third-generation squark mass , a common slepton mass and a common trilinear mixing parameter A, as well as the Higgs mixing parameter , the pseudoscalar Higgs mass and , the ratio of the two Higgs vacuum expectation values. We use the MultiNest sampling algorithm with 1.2 points to sample the pMSSM10 parameter space. A dedicated study shows that the sensitivities to strongly interacting sparticle masses of ATLAS and CMS searches for jets, leptons + signals depend only weakly on many of the other pMSSM10 parameters. With the aid of the Atom and Scorpion codes, we also implement the LHC searches for electroweakly interacting sparticles and light stops, so as to confront the pMSSM10 parameter space with all relevant SUSY searches. In addition, our analysis includes Higgs mass and rate measurements using the HiggsSignals code, SUSY Higgs exclusion bounds, the measurements of by LHCb and CMS, other B-physics observables, electroweak precision observables, the cold dark matter density and the XENON100 and LUX searches for spin-independent dark matter scattering, assuming that the cold dark matter is mainly provided by the lightest neutralino . We show that the pMSSM10 is able to provide a supersymmetric interpretation of , unlike the CMSSM, NUHM1 and NUHM2. As a result, we find (omitting Higgs rates) that the minimum with 18 degrees of freedom (d.o.f.) in the pMSSM10, corresponding to a probability of 30.8 %, to be compared with in the CMSSM (NUHM1) (NUHM2). We display the one-dimensional likelihood functions for sparticle masses, and we show that they may be significantly lighter in the pMSSM10 than in the other models, e.g., the gluino may be as light as 1250 at the 68 % CL, and squarks, stops, electroweak gauginos and sleptons may be much lighter than in the CMSSM, NUHM1 and NUHM2. We discuss the discovery potential of future LHC runs, colliders and direct detection experiments.