Abstract
We consider a U(1)′ supersymmetric seesaw model in which a right-handed sneutrino is a thermal dark matter candidate whose relic density can be in the right range due to its coupling to relatively light \( \tilde{Z}^{\prime } \), the superpartner of the extra gauge boson Z ′. Such light \( \tilde{Z}^{\prime } \) can be produced at the LHC through cascade decays of colored superparticles, in particular, stops and sbottoms, and then decay to a right-handed neutrino and a sneutrino dark matter, which leads to lepton flavor violating signals of same/opposite-sign dileptons (or multileptons) accompanied by large missing energy. Taking some benchmark points, we analyze the opposite- and same-sign dilepton signatures and the corresponding flavour difference i.e., (2e − 2μ). It is shown that 5σ signal significance can be reached for some benchmark points with very early data of ∼ 2 fb−1 integrated luminosity. In addition, 3ℓ and 4ℓ signatures also look promising to check the consistency in the model prediction, and it is possible to reconstruct the \( \tilde{Z}^{\prime } \) mass from jjℓ invariant mass distribution.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
L.J. Hall and M. Suzuki, Explicit R-Parity Breaking in Supersymmetric Models, Nucl. Phys. B 231 (1984) 419 [INSPIRE].
R.N. Mohapatra et al., Theory of neutrinos: A white paper, Rept. Prog. Phys. 70 (2007) 1757 [hep-ph/0510213] [INSPIRE].
P. Langacker, The Physics of Heavy Z ′ Gauge Bosons, Rev. Mod. Phys. 81 (2009) 1199 [arXiv:0801.1345] [INSPIRE].
G. Jungman, M. Kamionkowski and K. Griest, Supersymmetric dark matter, Phys. Rept. 267 (1996) 195 [hep-ph/9506380] [INSPIRE].
S. Khalil and A. Masiero, Radiative B-L symmetry breaking in supersymmetric models, Phys. Lett. B 665 (2008) 374 [arXiv:0710.3525] [INSPIRE].
P. Bandyopadhyay, E.J. Chun and J.-C. Park, Right-handed sneutrino dark matter in U(1)′ seesaw models and its signatures at the LHC, JHEP 06 (2011) 129 [arXiv:1105.1652] [INSPIRE].
W.-Y. Keung and G. Senjanović, Majorana Neutrinos and the Production of the Right-handed Charged Gauge Boson, Phys. Rev. Lett. 50 (1983) 1427 [INSPIRE].
E.J. Chun and S.K. Kang, One loop corrected neutrino masses and mixing in supersymmetric standard model without R-parity, Phys. Rev. D 61 (2000) 075012 [hep-ph/9909429] [INSPIRE].
D.-W. Jung, S.K. Kang, J.D. Park and E.J. Chun, Neutrino oscillations and collider test of the R-parity violating minimal supergravity model, JHEP 08 (2004) 017 [hep-ph/0407106] [INSPIRE].
B.C. Allanach, C.H. Kom and H. Pas, Large Hadron Collider probe of supersymmetric neutrinoless double beta decay mechanism, Phys. Rev. Lett. 103 (2009) 091801 [arXiv:0902.4697] [INSPIRE].
B.C. Allanach, C.H. Kom and H. Pas, LHC and B physics probes of neutrinoless double beta decay in supersymmetry without R-parity, JHEP 10 (2009) 026 [arXiv:0903.0347] [INSPIRE].
M. Nemevšek, G. Senjanović and V. Tello, Connecting Dirac and Majorana Neutrino Mass Matrices in the Minimal Left-Right Symmetric Model, Phys. Rev. Lett. 110 (2013) 151802 [arXiv:1211.2837] [INSPIRE].
ATLAS collaboration, Search for high-mass dilepton resonances in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 90 (2014) 052005 [arXiv:1405.4123] [INSPIRE].
CMS collaboration, Search for Resonances in the Dilepton Mass Distribution in pp Collisions at \( \sqrt{s}=8 \) TeV, CMS-PAS-EXO-12-061.
P. Bandyopadhyay, E.J. Chun and J.-C. Park, Right-handed sneutrino dark matter in U(1)′ seesaw models and its signatures at the LHC, JHEP 06 (2011) 129 [arXiv:1105.1652] [INSPIRE].
P. Bandyopadhyay, Probing non-universal gaugino masses via Higgs boson production under SUSY cascades at the LHC: A detailed study, JHEP 07 (2009) 102 [arXiv:0811.2537] [INSPIRE].
P. Bandyopadhyay, A. Datta and B. Mukhopadhyaya, Signatures of gaugino mass non-universality in cascade Higgs production at the LHC, Phys. Lett. B 670 (2008) 5 [arXiv:0806.2367] [INSPIRE].
CMS collaboration, Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE].
ATLAS collaboration, Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC, Phys. Lett. B 716 (2012) 1 [arXiv:1207.7214] [INSPIRE].
M. Carena, S. Gori, N.R. Shah and C.E.M. Wagner, A 125 GeV SM-like Higgs in the MSSM and the γγ rate, JHEP 03 (2012) 014 [arXiv:1112.3336] [INSPIRE].
H. Baer, V. Barger and A. Mustafayev, Neutralino dark matter in mSUGRA/CMSSM with a 125 GeV light Higgs scalar, JHEP 05 (2012) 091 [arXiv:1202.4038] [INSPIRE].
A. Djouadi, J.-L. Kneur and G. Moultaka, SuSpect: A Fortran code for the supersymmetric and Higgs particle spectrum in the MSSM, Comput. Phys. Commun. 176 (2007) 426 [hep-ph/0211331] [INSPIRE].
M. Frank, T. Hahn, S. Heinemeyer, W. Hollik, H. Rzehak and G. Weiglein, The Higgs Boson Masses and Mixings of the Complex MSSM in the Feynman-Diagrammatic Approach, JHEP 02 (2007) 047 [hep-ph/0611326] [INSPIRE].
L.J. Hall, D. Pinner and J.T. Ruderman, A Natural SUSY Higgs Near 126 GeV, JHEP 04 (2012) 131 [arXiv:1112.2703] [INSPIRE].
https://twiki.cern.ch/twiki/bin/view/AtlasPublic/SupersymmetryPublicResults.
https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSUS.
ATLAS collaboration, Search for strongly produced superpartners in final states with two same sign leptons with the ATLAS detector using 21 fb−1 of proton-proton collisions at \( \sqrt{s}=8 \) TeV, ATLAS-CONF-2013-007 (2013).
CMS collaboration, Search for Supersymmetry in pp collisions at 8 TeV in events with a single lepton, multiple jets and b-tags, CMS-PAS-SUS-13-007.
CMS collaboration, Search for supersymmetry in hadronic final states with missing transverse energy using the variables α T and b-quark multiplicity in pp collisions at \( \sqrt{s}=8 \) TeV, Eur. Phys. J. C 73 (2013) 2568 [arXiv:1303.2985] [INSPIRE].
A. Pukhov, CalcHEP 2.3: MSSM, structure functions, event generation, batchs and generation of matrix elements for other packages, hep-ph/0412191 [INSPIRE].
A. Belyaev, N.D. Christensen and A. Pukhov, CalcHEP 3.4 for collider physics within and beyond the Standard Model, Comput. Phys. Commun. 184 (2013) 1729 [arXiv:1207.6082] [INSPIRE].
ATLAS collaboration, Searches for direct scalar top pair production in final states with two leptons using the stransverse mass variable and a multivariate analysis technique in \( \sqrt{s}=8 \) TeV pp collisions using 20.3fb −1 of ATLAS data, ATLAS-CONF-2013-065 (2013).
ATLAS collaboration, Search for direct top squark pair production in final states with one isolated lepton, jets and missing transverse momentum in sqrts = 8, TeV pp collisions using 21 fb −1 of ATLAS data, ATLAS-CONF-2013-037 (2013).
CMS collaboration, Search for top-squark pair production in the single-lepton final state in pp collisions at \( \sqrt{s}=8 \) TeV, Eur. Phys. J. C 73 (2013) 2677 [arXiv:1308.1586] [INSPIRE].
ATLAS collaboration, Search for strong production of supersymmetric particles in final states with missing transverse momentum and at least three b-jets using 20.1 fb −1 of pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS Detector, ATLAS-CONF-2013-061 (2013).
ATLAS collaboration, Search for new phenomena using final states with large jet multiplicities and missing transverse momentum with ATLAS in 20 fb −1 of \( \sqrt{s}=8 \) TeV proton-proton collisions, ATLAS-CONF-2013-054 (2013).
CMS collaboration, Search for supersymmetry in pp collisions at \( \sqrt{s}=8 \) TeV in events with a single lepton, large jet multiplicity and multiple b jets, Phys. Lett. B 733 (2014) 328 [arXiv:1311.4937] [INSPIRE].
CTEQ collaboration, H.L. Lai et al., Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions, Eur. Phys. J. C 12 (2000) 375 [hep-ph/9903282] [INSPIRE].
J. Pumplin, D.R. Stump, J. Huston, H.L. Lai, P.M. Nadolsky and W.K. Tung, New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].
T. Sjöstrand, L. Lönnblad and S. Mrenna, PYTHIA 6.2: Physics and manual, hep-ph/0108264 [INSPIRE].
P.Z. Skands et al., SUSY Les Houches accord: Interfacing SUSY spectrum calculators, decay packages and event generators, JHEP 07 (2004) 036 [hep-ph/0311123] [INSPIRE].
M. Cacciari, G.P. Salam and G. Soyez, FastJet User Manual, Eur. Phys. J. C 72 (2012) 1896 [arXiv:1111.6097] [INSPIRE].
ATLAS collaboration, Search for strongly produced supersymmetric particles in decays with two leptons at \( \sqrt{s}=8 \) TeV, ATLAS-CONF-2013-089 (2013).
LHCb collaboration, First Evidence for the Decay B 0 s → μ + μ −, Phys. Rev. Lett. 110 (2013) 021801 [arXiv:1211.2674] [INSPIRE].
BaBar collaboration, J.P. Lees et al., Exclusive Measurements of b → sγ Transition Rate and Photon Energy Spectrum, Phys. Rev. D 86 (2012) 052012 [arXiv:1207.2520] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1412.7312
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
About this article
Cite this article
Bandyopadhyay, P., Chun, E.J. Lepton flavour violating signature in supersymmetric U(1)′ seesaw models at the LHC. J. High Energ. Phys. 2015, 45 (2015). https://doi.org/10.1007/JHEP05(2015)045
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP05(2015)045