Looking for lepton flavour violation in supersymmetry at the LHC

Abstract

We consider models of supersymmetry which can incorporate sizeable mixing between different generations of sfermions. While the mixing is constrained by the non-observation of various flavour changing neutral current (FCNC) processes, there exist regions of SUSY parameter space where the effects of such mixing can be probed at colliders. In this work, we explore this possibility by focussing on the slepton sector. The sleptons are produced through cascade decays in direct neutralino-chargino (${\chi }_2^0{\chi }_1^{\pm }$) pair production at the LHC. The final state is characterized by 3 leptons and missing energy. We probe the lepton flavour violating (LFV) vertex originating from ${\chi }_2^0$ decay and identify a distinct and unambiguous combination of the tri-lepton final state which include a lepton pair with same flavour and same sign (SFSS) in addition to a pair with opposite flavour and opposite sign (OFOS). This combination of tri-lepton final state containing both OFOS and SFSS pairs, can not only suppress the SM background but can also differentiate the flavour violating decays of ${\chi }_2^0$ from its corresponding flavour conserving decays. We present results for various signal benchmark points taking into account background contributions assuming two luminosity options (100 fb${}^{-1}$ and 1000 fb${}^{-1}$) for LHC Run 2 experiment.

21 Pages, 5 Figures

References in corpus (28)

• Vector boson pair production at the LHC
• Explaining $h\to {\mu }^{\pm }{\tau }^{\mp }$, $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$ and $B\to K{\mu }^{+}{\mu }^{-}/B\to K{e}^{+}{e}^{-}$ in a two-Higgs-doublet model with gauged $L_{\mu }-L_{\tau }$
• Search for lepton-flavour-violating decays of the Higgs boson
• Flavor in Supersymmetry with an Extended R-symmetry
• Higgs Mediated FCNC's in Warped Extra Dimensions
• Imprints of massive inverse seesaw model neutrinos in lepton flavor violating Higgs boson decays
• Lepton Flavour Violation from SUSY--GUTs: Where do we stand for MEG, PRISM/PRIME and a Super Flavour factory
• Higgs $\to \mu \tau$ in Abelian and Non-Abelian Flavor Symmetry Models
• Explaining the CMS Higgs flavor violating decay excess
• The Standard Model and Supersymmetric Flavor Puzzles at the Large Hadron Collider
• Higgs Flavor Violation as a Signal to Discriminate Models
• Lepton Flavor Violation in Flavored Gauge Mediation
• Higgs to mu tau Decay in Supersymmetry without R Parity
• Flavour Violation in Gauge-Mediated Supersymmetry Breaking Models: Experimental Constraints and Phenomenology at the LHC
• Measuring Lepton Flavour Violation at LHC with Long-Lived Slepton in the Coannihilation Region
• Lepton-Flavored Scalar Dark Matter with Minimal Flavor Violation
• Squark Flavor Violation at the LHC
• Flavorful Supersymmetry
• Measuring Smuon-Selectron Mass Splitting at the LHC and Patterns of Supersymmetry Breaking
• Flavorful Supersymmetry from Higher Dimensions
• Flavour in supersymmetry: horizontal symmetries or wave function renormalisation
• Selectron NLSP in Gauge Mediation
• Naturally Flavorful Supersymmetry at the LHC
• Status of Supersymmetric Seesaw in SO(10) models
• Flavour Physics and Grand Unification
• A Clean Slepton Mixing Signal at the LHC
• Using the e^{+/-} mu^{-/+} + E^{miss}_T signature in the search for supersymmetry and lepton flavour violation in neutralino decays
• Lepton Flavor Violation at the LHC

Cited by in corpus (1)

• Indian Contributions to LHC Theory