Prospects for Hypercharged Anomaly Mediated SUSY Breaking at the LHC

Abstract

We investigate the phenomenological consequences of string models wherein the MSSM resides on a D-brane, and the hypercharge gaugino mass is generated in a geometrically separated hidden sector. This hypercharged anomaly-mediated SUSY breaking (HCAMSB) model naturally solves the tachyonic slepton mass problem endemic to pure AMSB scenarios. In HCAMSB, one obtains a mass ordering M_1>μ>M_2 with split left- and right- scalars, whereas in mAMSB models, one obtains μ>M_1>M_2 with nearly degenerate left- and right-scalars. We compute the allowed parameter space and expected superparticle mass spectrum in the HCAMSB model. For low values of the HC and AMSB mixing parameter α, the spectra is characterized by light left-sleptons, while the spectra for large αis characterized by light top- and bottom- squarks. We map out the approximate reach of LHC for HCAMSB, and find that with 100 fb^{-1} of integrated luminosity, a gravitino mass of \sim 115 (105) TeV can be probed for low (high) values of α, corresponding to a gluino mass reach of \sim 2.4 (2.2) TeV. Both cases contain-- as is typical in AMSB models-- long lived charginos that should yield visible highly ionizing tracks in the LHC detector. Also, in the lower \tanβrange, HCAMSB models give rise to reconstructable Z\to \ell\bar{\ell} candidates in SUSY cascade decay events, while mAMSB models should do so only rarely.

36 pages including 25 figures

References in corpus (40)

• Out Of This World Supersymmetry Breaking
• Gaugino Mass without Singlets
• Precision Corrections in the Minimal Supersymmetric Standard Model
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Wino Cold Dark Matter from Anomaly-Mediated SUSY Breaking
• Phenomenological consequences of supersymmetry with anomaly-induced masses
• Axinos as Cold Dark Matter
• Axinos as Dark Matter
• Discovering Supersymmetry at the Tevatron in Wino LSP Scenarios
• Signals for Minimal Supergravity at the CERN Large Hadron Collider II: Multilepton Channels
• SIGNALS FOR MINIMAL SUPERGRAVITY AT THE CERN LARGE HADRON COLLIDER: MULTI-JET PLUS MISSING ENERGY CHANNEL,
• Supernatural Supersymmetry: Phenomenological Implications of Anomaly-Mediated Supersymmetry Breaking
• D-branes at Singularities, Compactification, and Hypercharge
• Generic and Chiral Extensions of the Supersymmetric Standard Model
• $b\to s\gamma$ Constraints on the Minimal Supergravity Model with Large $\tan \beta$
• Dark Matter Candidates - Axions, Neutralinos, Gravitinos, and Axinos
• Impact of Muon Anomalous Magnetic Moment on Supersymmetric Models
• Detecting Sleptons at Hadron Colliders and Supercolliders
• QCD Improved $b\to s\gamma$ Constraints on the Minimal Supergravity Model
• Comparison of SUSY spectrum calculations and impact on the relic density constraints from WMAP
• Discovering anomaly-mediated supersymmetry at the LHC
• Sequestering in String Theory
• Supersymmetry discovery potential of the LHC at $\sqrt{s}=$10 and 14 TeV without and with missing $E_T$
• Test of Anomaly Mediation at the LHC
• Z'-mediated Supersymmetry Breaking
• Reach of the CERN LHC for the Minimal Anomaly-Mediated SUSY Breaking Model
• Precision gluino mass at the LHC in SUSY models with decoupled scalars
• RG invariant solutions for the soft supersymmetry breaking parameters
• Radiatively Generated Maximal Mixing Scenario for the Higgs Mass and the Least Fine Tuned Minimal Supersymmetric Standard Model
• Supersymmetry Studies at Future Linear $e^{+}{e}^{-}$ Colliders
• Mainly axion cold dark matter in the minimal supergravity model
• Testing the Anomaly Mediation at the LHC
• Heavy-flavour tagging and the supersymmetry reach of the CERN Large Hadron Collider
• Unusual Higgs or Supersymmetry from Natural Electroweak Symmetry Breaking
• Hypercharged Anomaly Mediation
• The Reach of the Fermilab Tevatron and CERN LHC for Gaugino Mediated SUSY Breaking Models
• Early SUSY discovery at LHC without missing E_T: the role of multi-leptons
• A Higher Form (of) Mediation
• Early SUSY discovery at LHC via sparticle cascade decays to same-sign and multimuon states
• Characteristic slepton signal in anomaly mediated SUSY breaking models via gauge boson fusion at the LHC

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• Neutralino, axion and axino cold dark matter in minimal, hypercharged and gaugino AMSB
• Gaugino Anomaly Mediated SUSY Breaking: phenomenology and prospects for the LHC
• Anomaly mediated SUSY breaking scenarios in the light of cosmology and in the dark (matter)
• Some necessary conditions for allowing the PQ scale as high as M_{GUT} in SUSY models with an axino or neutralino LSP
• Anomaly mediated supersymmetric models and Higgs data from the LHC
• Reconciling thermal leptogenesis with the gravitino problem in SUSY models with mixed axion/axino dark matter
• Testing the gaugino AMSB model at the Tevatron via slepton pair production