Measurement of CP Violation in Stop Cascade Decays at the LHC
arXiv:0809.1607 · doi:10.1140/epjc/s10052-009-0964-8
Abstract
We study the potential observation at the LHC of CP-violating effects in stop production and subsequent cascade decays, g g -> tilde{t}_i tilde{t}_i, tilde{t}_i -> t tilde{chi}^0_j, tilde{chi}^0_j -> tildeχ^0_1 l^+ l^-, within the Minimal Supersymmetric Standard Model. We study T-odd asymmetries based on triple products between the different decay products. There may be a large CP asymmetry at the parton level, but there is a significant dilution at the hadronic level after integrating over the parton distribution functions. Consequently, even for scenarios where large CP intrinsic asymmetries are expected, the measurable asymmetry is rather small. High luminosity and precise measurements of masses, branching ratios and CP asymmetries may enable measurements of the CP-violating parameters in cascade decays at the LHC.
arXiv commentVersion accepted for publication in EPJC
References in corpus (34)
- An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
- SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
- Electric dipole moments as probes of new physics
- Physics Interplay of the LHC and the ILC
- The Neutron and the Electron Electric Dipole Moment in N=1 Supergravity Unification
- A new limit on the permanent electric dipole moment of ^{199}Hg
- Electric Dipole Moments Do Not Require the CP-violating Phases of Supersymmetry To Be Small
- Update of Parton Distributions at NNLO
- CP-Violating Phases in SUSY, Electric Dipole Moments, and Linear Colliders
- Higgs-Mediated Electric Dipole Moments in the MSSM: An Application to Baryogenesis and Higgs Searches
- Electron and Neutron Electric Dipole Moments in the Constrained MSSM
- Top Quark Pair Production close to Threshold: Top Mass, Width and Momentum Distribution
- Prediction for the Lightest Higgs Boson Mass in the CMSSM using Indirect Experimental Constraints
- CP-odd Phase Correlations and Electric Dipole Moments
- Effect of supersymmetric phases on lepton dipole moments and rare lepton decays
- CP Phases in Correlated Production and Decay of Neutralinos in the Minimal Supersymmetric Standard Model
- Reconciling large CP-violating phases with bounds on the electric dipole moments in the MSSM
- Systematic study of the impact of CP-violating phases of the MSSM on leptonic high-energy observables
- Neutron-Electron EDM Correlations in Supersymmetry and Prospects for EDM Searches
- Fermion polarization in sfermion decays as a probe of CP phases in the MSSM
- A T-odd asymmetry in neutralino production and decay
- Top Squarks and Bottom Squarks in the MSSM with Complex Parameters
- Tau-Sleptons and Tau-Sneutrino in the MSSM with Complex Parameters
- Impact of CP phases on stop and sbottom searches
- T-odd Correlations in the Decay of Scalar Fermions
- Analysis of the Neutralino System in Three--Body Leptonic Decays of Neutralinos
- A T-odd observable sensitive to CP violating phases in squark decay
- Simulation of Beyond Standard Model Physics in Herwig++
- A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino
- Triple product correlations in top squark decays
- Combined LHC/ILC analysis of a SUSY scenario with heavy sfermions
- CP asymmetries in scalar bottom quark decays
- CP Violation in Supersymmetric Theories: stop2 -> stop1 tau- tau+
- Effective Lagrangian for , interactions and Fermionic Decays of the Squarks with CP Phases
Cited by in corpus (26)
- Stop Reconstruction with Tagged Tops
- A Comprehensive Analysis of Electric Dipole Moment Constraints on CP-violating Phases in the MSSM
- From the LHC to Future Colliders
- Proposals for Bottom Quark/Squark Renormalization in the Complex MSSM
- How to Improve Top Tagging
- Boosted Semileptonic Tops in Stop Decays
- Genuine CP-odd Observables at the LHC
- Heavy Scalar Top Quark Decays in the Complex MSSM: A Full One-Loop Analysis
- Benchmarking an Even Better HEPTopTagger
- Probing SUSY CP Violation in Two-Body Stop Decays at the LHC
- Probing CP Violation with and without Momentum Reconstruction at the LHC
- Consistent on shell renormalisation of electroweakinos in the complex MSSM: LHC and LC predictions
- Towards Measuring the Stop Mixing Angle at the LHC
- CP violation in sbottom decays
- Boosted top quarks in supersymmetric cascade decays at the LHC
- Normal tau polarisation as a sensitive probe of CP violation in chargino decay
- Testing the CP-violating MSSM in stau decays at the LHC and ILC
- Measurement of CP asymmetries in neutralino production at the ILC
- CP asymmetries in the supersymmetric trilepton signal at the LHC
- CP-violation in SUSY cascades at the LHC
- CP-sensitive spin-spin correlations in neutralino production at the ILC
- Momentum reconstruction at the LHC for probing CP-violation in the stop sector
- Momentum asymmetries as CP violating observables
- CP Violating Asymmetry in Stop Decay into Bottom and Chargino
- Interference Effects, Time Reversal Violation and Search for New Physics in Hadronic Weak Decays
- Probing CP Violation with Kinematic Reconstruction at the LHC