The pMSSM10 after LHC run 1

K J de Vries; E A Bagnaschi; O Buchmueller; R Cavanaugh; M Citron; A De Roeck; M J Dolan; J R Ellis; H Flächer; S Heinemeyer; G Isidori; S Malik; J Marrouche; D Martínez Santos; K A Olive; K Sakurai; G Weiglein

doi:10.1140/epjc/s10052-015-3599-y

The pMSSM10 after LHC run 1

Eur Phys J C Part Fields. 2015;75(9):422. doi: 10.1140/epjc/s10052-015-3599-y. Epub 2015 Sep 15.

Authors

K J de Vries¹, E A Bagnaschi², O Buchmueller¹, R Cavanaugh³, M Citron¹, A De Roeck⁴, M J Dolan⁵, J R Ellis⁶, H Flächer⁷, S Heinemeyer⁸, G Isidori⁹, S Malik¹, J Marrouche¹⁰, D Martínez Santos¹¹, K A Olive¹², K Sakurai¹³, G Weiglein²

Affiliations

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

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 [Formula: see text]: the gaugino masses [Formula: see text], the first-and second-generation squark masses [Formula: see text], the third-generation squark mass [Formula: see text], a common slepton mass [Formula: see text] and a common trilinear mixing parameter A, as well as the Higgs mixing parameter [Formula: see text], the pseudoscalar Higgs mass [Formula: see text] and [Formula: see text], the ratio of the two Higgs vacuum expectation values. We use the MultiNest sampling algorithm with [Formula: see text]1.2 [Formula: see text] 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 [Formula: see text][Formula: see text] 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 [Formula: see text] 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 [Formula: see text]. We show that the pMSSM10 is able to provide a supersymmetric interpretation of [Formula: see text], unlike the CMSSM, NUHM1 and NUHM2. As a result, we find (omitting Higgs rates) that the minimum [Formula: see text] with 18 degrees of freedom (d.o.f.) in the pMSSM10, corresponding to a [Formula: see text] probability of 30.8 %, to be compared with [Formula: see text] 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 [Formula: see text]1250 [Formula: see text] 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, [Formula: see text] colliders and direct detection experiments.