Squark Flavor Violation at the LHC

Abstract

We consider the prospects for measuring squark flavor violation through the signal of single top production at the LHC. We study this signal in the context of R-symmetric supersymmetry, which allows for large flavor violation in the squark sector, however the results can also be generalized to the MSSM. The single top signal arises from squark pair production in which one squark decays to a top and gaugino, whereas the other squark decays to a non-top quark and gaugino. We study three decay patterns: (I) squark decay into a quark and neutralino LSP; (II) squark decay into a quark and neutralino NLSP, with subsequent decay of the NLSP to a photon and gravitino; (III) squark decay into a quark and chargino NLSP, with subsequent decay of the NLSP to a H^\pm/W^\pm and gravitino. Case II is the most promising, when the NLSP decay is prompt, since every event contains two hard photons that can be used to tag the events, reducing the background to a negligible level. Case I is promising if the neutralino LSP is bino-like. We carefully consider large SM backgrounds and identify a series of cuts to isolate the signal. Case III can occur in the MRSSM with Higgsino-like lightest gauginos. Due to the large Higgs coupling, squarks preferentially decay to top quarks, substantially reducing the potential flavor violating signal. Nevertheless, the flavor violating signal might still be identifiable if the chargino NLSP is long-lived.

9 figures and 4 tables

References in corpus (43)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Observation of an anomalous positron abundance in the cosmic radiation
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Theories with Gauge-Mediated Supersymmetry Breaking
• MadGraph/MadEvent v4: The New Web Generation
• A complete analysis of FCNC and CP constraints in general SUSY extensions of the standard model
• QCD Matrix Elements + Parton Showers
• MadEvent: Automatic Event Generation with MadGraph
• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
• Single Top Production as a Window to Physics Beyond the Standard Model
• Flavor in Supersymmetry with an Extended R-symmetry
• Using Subsystem MT2 for Complete Mass Determinations in Decay Chains with Missing Energy at Hadron Colliders
• Search for supersymmetry with a light gravitino at the Fermilab Tevatron and CERN LEP colliders
• Seeking Sgluons
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Mass Determination in SUSY-like Events with Missing Energy
• An Effective Theory of Dirac Dark Matter
• Accurate Mass Determinations in Decay Chains with Missing Energy
• Spin Measurements in Cascade Decays at the LHC
• Distinguishing Spins in Decay Chains at the Large Hadron Collider
• More Visible Effects of the Hidden Sector
• A hidden solution to the mu/B_mu problem in gauge mediation
• Supersymmetry with a Chargino NLSP and Gravitino LSP
• Squark and Gaugino Hadroproduction and Decays in Non-Minimal Flavour Violating Supersymmetry
• Hidden sector renormalization of MSSM scalar masses
• R-parity-violating SUSY effects and signals in single top production at the Tevatron
• Single-top-squark production via R-parity-violating supersymmetric couplings in hadron collisions
• Single top quark production as a probe of R-parity-violating SUSY at pp and p\bar p colliders
• On The Possible Detection Of Massive Stable Exotic Particles At The LHC
• Direct probes of R-parity-violating supersymmetric couplings via single-top-squark production
• Detecting Exotic Heavy Leptons at the Large Hadron Collider
• FCNC production of same sign Top quark pairs at the LHC
• Single Top Production via Gluon Fusion at CERN LHC
• Single top quark production via SUSY-QCD FCNC couplings at the CERN LHC in the unconstrained MSSM
• Single top-quark production by direct supersymmetric flavor-changing neutral-current interactions at the LHC
• Single top-quark production by strong and electroweak supersymmetric flavor-changing interactions at the LHC
• FCNC-induced heavy-quark events at the LHC from Supersymmetry
• QCD Corrections to K-Kbar Mixing in R-symmetric Supersymmetric Models
• Using Charge Asymmetries to Measure Single Top Quark Production at the LHC
• GMSB SUSY models with non pointing photons signatures in ATLAS at the LHC
• Search for long-lived particles in ATLAS and CMS

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• Physics searches at the LHC
• Supersoft Supersymmetry is Super-Safe
• THE TOOLS AND MONTE CARLO WORKING GROUP Summary Report from the Les Houches 2009 Workshop on TeV Colliders
• Flavoured Naturalness
• Viable Gravity-Mediated Supersymmetry Breaking
• μto e in R-symmetric Supersymmetry
• Single top and Higgs associated production at the LHC
• Neutrino Mass, Sneutrino Dark Matter and Signals of Lepton Flavor Violation in the MRSSM
• Electroweak Baryogenesis in R-symmetric Supersymmetry
• Mixing stops at the LHC
• Impact of squark generation mixing on the search for gluinos at LHC
• Mixed Gauginos Sending Mixed Messages to the LHC
• Impact of squark generation mixing on the search for squarks decaying into fermions at LHC
• Understanding Single Tops using Jets
• Confronting the coloured sector of the MRSSM with LHC data
• The LFV decays of Z boson in Minimal R-symmetric Supersymmetric Standard Model
• TASI 2009 Lectures - Flavor Physics
• Single top production in a non-minimal supersymmetric model
• Muon conversion to electron in nuclei in Minimal R-symmetric Supersymmetric Standard Model
• Gluino Meets Flavored Naturalness
• The lepton flavor violating decays of vector mesons in the MRSSM
• Flavour Physics Beyond the Standard Model: Recent Developments and Future Perspectives
• Searching for lepton flavor violating decays tau to Pl in Minimal R-symmetric Supersymmetric Standard Model
• $l_{\alpha }\to 3l_{\beta }$ in Minimal R-symmetric Supersymmetric Standard Model
• Signs of Tops from Highly Mixed Stops
• One loop correction to $Z\to \nu \nu$ in the Minimal R-symmetric Supersymmetric Standard Model
• Looking for lepton flavour violation in supersymmetry at the LHC
• Squark flavour violation and naturalness at the LHC