Effective supersymmetry at the LHC

2010/07/22 by Howard Baer, Sabine Kraml, Andre Lessa +2 · 3 citations
Physics and Astronomy · #Chargino #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #Gluino #Higgs boson #Large Hadron Collider #Lightest Supersymmetric Particle #Minimal Supersymmetric Standard Model #Neutralino #Particle physics theoretical and experimental studies #Supersymmetry #hep-ph

paper · pdf · doi:10.1007/jhep10(2010)018

published as JHEP 1010:018,2010 · 26 pages including 13 figures

arxiv created 2010/07/22 · openalex publication_date 2010/10/01 · arxiv updated 2014/11/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate the phenomenology of Effective Supersymmetry (ESUSY) models wherein electroweak gauginos and third generation scalars have masses up to about 1 TeV while first and second generation scalars lie in the multi-TeV range. Such models ameliorate the SUSY flavor and CP problems via a decoupling solution, while at the same time maintaining naturalness. In our analysis, we assume independent GUT scale mass parameters for third and first/second generation scalars and for the Higgs scalars, in addition to m 1/2, tan β and A 0, and require radiative electroweak symmetry breaking as usual. We analyse the parameter space which is consistent with current constraints, by means of a Markov Chain Monte Carlo scan. The lightest MSSM particle (LMP) is mostly, but not always the lightest neutralino, and moreover, the thermal relic density of the neutralino LMP is frequently very large. These models may phenomenologically be perfectly viable if the LMP before nucleosynthesis decays into the axino plus SM particles. Dark matter is then an axion/axino mixture. At the LHC, the most important production mechanisms are gluino production (for m 1/2 ≲ 700 GeV) and third generation squark production, while SUSY events rich in b-jets are the hallmark of the ESUSY scenario. We present a set of ESUSY benchmark points with characteristic features and discuss their LHC phenomenology.

Citations

• Testing Yukawa-unified SUSY during year 1 of LHC: the role of multiple b-jets, dileptons and missing E T
• Signatures of axinos and gravitinos at colliders
• Should squarks be degenerate?
• Direct, indirect and collider detection of neutralino dark matter in SUSY models with non-universal Higgs masses
• Viable and testable SUSY GUTs with Yukawa unification: the case of split trilinears
• The number density of a charged relic
• A Markov chain Monte Carlo analysis of the CMSSM
• Likelihood functions for supersymmetric observables in frequentist analyses of the CMSSM and NUHM1

Cited by

• Implications of a 125 GeV Higgs scalar for the LHC supersymmetry and neutralino dark matter searches
• Impact of CMS Multi-jets and Missing Energy Search on CMSSM Fits
• Some necessary conditions for allowing the PQ scale as high as M GUT in SUSY models with an axino or neutralino LSP

Related

• The Minimal SUSY B-L Model: From the Unification Scale to the LHC
• PhD Thesis - Topics in SUSY Phenomenology at the LHC
• The Reach of LHC (CMS) for Models with Effective Supersymmetry and Nonuniversal Gaugino Masses
• Living dangerously with decoupled first/second generation scalars: SUSY prospects at the LHC
• Beyond SM Physics and searches for SUSY at the LHC