# Same-sign multilepton signatures of an SU(2)_{R} quintuplet at the LHC

- 11 Downloads

## Abstract

We study in detail the collider signatures of an SU(2)_{R} fermionic quintuplet in the framework of left-right symmetric model in the context of the 13 TeV LHC. Apart from giving a viable dark matter candidate (*χ*^{0}), this model provides unique collider imprints in the form of same-sign multileptons through the decays of multi-charged components of the quintuplet. In particular, we consider the scenario where the quintuplet carries (*B* − *L*) = 4 charge, allowing for the presence of high charge-multiplicity particles with relatively larger mass differences among them compared to (*B* − *L*) = 0 or 2. In this paper, we mainly focus on the same-sign n-lepton signatures (nSSL). We show that with an integrated luminosity of 500 fb^{−1}, the mass of the neutral component, \( {M}_{\chi^0} \) ≤ 480 (800) GeV can be excluded at 95% CL in the 2SSL (3SSL) channel after imposing several selection criteria. We also show that a 5σ discovery is also achievable if \( {M}_{\chi^0} \) ≤ 390 (750) GeV in the 2SSL (3SSL) channel with 1000 fb^{−1} integrated luminosity.

## Keywords

Beyond Standard Model Higgs Physics## Notes

### **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.

## References

- [1]P. Ko and T. Nomura, SU(2)
_{L}× SU(2)_{R}*minimal dark matter with*2*TeV W*′,*Phys. Lett.***B 753**(2016) 612 [arXiv:1510.07872] [INSPIRE].ADSCrossRefGoogle Scholar - [2]S.K. Agarwalla, K. Ghosh and A. Patra,
*LHC diphoton excess in a left-right symmetric model with minimal dark matter*, arXiv:1607.03878 [INSPIRE]. - [3]S. Kumar Agarwalla, K. Ghosh and A. Patra,
*Sub-TeV quintuplet minimal dark matter with left-right symmetry*,*JHEP***05**(2018) 123 [arXiv:1803.01670] [INSPIRE].ADSCrossRefGoogle Scholar - [4]M. Cirelli, N. Fornengo and A. Strumia,
*Minimal dark matter*,*Nucl. Phys.***B 753**(2006) 178 [hep-ph/0512090] [INSPIRE]. - [5]J. Heeck and S. Patra,
*Minimal left-right symmetric dark matter*,*Phys. Rev. Lett.***115**(2015) 121804 [arXiv:1507.01584] [INSPIRE]. - [6]C. Garcia-Cely and J. Heeck,
*Phenomenology of left-right symmetric dark matter*, arXiv:1512.03332 [INSPIRE]. - [7]N. Maru, N. Okada and S. Okada,
*Fermionic minimal dark matter in*5*D gauge-Higgs unification*,*Phys. Rev.***D 96**(2017) 115023 [arXiv:1801.00686] [INSPIRE].ADSGoogle Scholar - [8]B. Ostdiek,
*Constraining the minimal dark matter fiveplet with LHC searches*,*Phys. Rev.***D 92**(2015) 055008 [arXiv:1506.03445] [INSPIRE]. - [9]K. Kumericki, I. Picek and B. Radovcic,
*TeV-scale seesaw with quintuplet fermions*,*Phys. Rev.***D 86**(2012) 013006 [arXiv:1204.6599] [INSPIRE].ADSGoogle Scholar - [10]Y. Yu, C.-X. Yue and S. Yang,
*Signatures of the quintuplet leptons at the LHC*,*Phys. Rev.***D 91**(2015) 093003 [arXiv:1502.02801] [INSPIRE]. - [11]R.N. Mohapatra and J.C. Pati,
*Left-right gauge symmetry and an isoconjugate model of CP-violation*,*Phys. Rev.***D 11**(1975) 566 [INSPIRE].ADSGoogle Scholar - [12]G. Senjanović and R.N. Mohapatra,
*Exact left-right symmetry and spontaneous violation of parity*,*Phys. Rev.***D 12**(1975) 1502 [INSPIRE].ADSGoogle Scholar - [13]M.A.B. Beg and H.S. Tsao,
*Strong P, T noninvariances in a superweak theory*,*Phys. Rev. Lett.***41**(1978) 278 [INSPIRE].ADSCrossRefGoogle Scholar - [14]R.N. Mohapatra and G. Senjanović,
*Natural suppression of strong P and T noninvariance*,*Phys. Lett.***B 79**(1978) 283 [INSPIRE].ADSCrossRefGoogle Scholar - [15]K.S. Babu and R.N. Mohapatra,
*A solution to the strong CP problem without an axion*,*Phys. Rev.***D 41**(1990) 1286 [INSPIRE].ADSGoogle Scholar - [16]S.M. Barr, D. Chang and G. Senjanović,
*Strong CP problem and parity*,*Phys. Rev. Lett.***67**(1991) 2765 [INSPIRE]. - [17]R.N. Mohapatra and A. Rasin,
*Simple supersymmetric solution to the strong CP problem*,*Phys. Rev. Lett.***76**(1996) 3490 [hep-ph/9511391] [INSPIRE]. - [18]R. Kuchimanchi,
*Solution to the strong CP problem: supersymmetry with parity*,*Phys. Rev. Lett.***76**(1996) 3486 [hep-ph/9511376] [INSPIRE]. - [19]R.N. Mohapatra, A. Rasin and G. Senjanović,
*P, C and strong CP in left-right supersymmetric models*,*Phys. Rev. Lett.***79**(1997) 4744 [hep-ph/9707281] [INSPIRE]. - [20]K.S. Babu, B. Dutta and R.N. Mohapatra,
*Solving the strong CP and the SUSY phase problems with parity symmetry*,*Phys. Rev.***D 65**(2002) 016005 [hep-ph/0107100] [INSPIRE]. - [21]R. Kuchimanchi,
*P/CP conserving CP/P violation solves strong CP problem*,*Phys. Rev.***D 82**(2010) 116008 [arXiv:1009.5961] [INSPIRE]. - [22]R.D. Peccei and H.R. Quinn,
*CP conservation in the presence of instantons*,*Phys. Rev. Lett.***38**(1977) 1440 [INSPIRE]. - [23]B. Mukhopadhyaya and S. Mukhopadhyay,
*Same-sign trileptons and four-leptons as signatures of new physics at the CERN Large Hadron Collider*,*Phys. Rev.***D 82**(2010) 031501 [arXiv:1005.3051] [INSPIRE].ADSGoogle Scholar - [24]S. Mukhopadhyay and B. Mukhopadhyaya,
*Same-sign trileptons at the LHC: a window to lepton-number violating supersymmetry*,*Phys. Rev.***D 84**(2011) 095001 [arXiv:1108.4921] [INSPIRE].ADSGoogle Scholar - [25]G. Bambhaniya, J. Chakrabortty, S. Goswami and P. Konar,
*Generation of neutrino mass from new physics at TeV scale and multilepton signatures at the LHC*,*Phys. Rev.***D 88**(2013) 075006 [arXiv:1305.2795] [INSPIRE]. - [26]E.J. Chun and P. Sharma,
*Same-sign tetra-leptons from type II seesaw*,*JHEP***08**(2012) 162 [arXiv:1206.6278] [INSPIRE].ADSCrossRefGoogle Scholar - [27]CMS collaboration,
*Search for physics beyond the Standard Model in events with two leptons of same sign, missing transverse momentum and jets in proton-proton collisions at*\( \sqrt{s}=13 \)*TeV*,*Eur. Phys. J.***C 77**(2017) 578 [arXiv:1704.07323] [INSPIRE]. - [28]ATLAS collaboration,
*Inclusive search for same-sign dilepton signatures in pp collisions at*\( \sqrt{s}=7 \)*TeV with the ATLAS detector*,*JHEP***10**(2011) 107 [arXiv:1108.0366] [INSPIRE]. - [29]ATLAS collaboration,
*Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at*\( \sqrt{s}=8 \)*TeV with the ATLAS detector*,*JHEP***04**(2015)116 [arXiv:1501.03555] [INSPIRE]. - [30]ATLAS collaboration,
*Search for squarks and gluinos in events with an isolated lepton, jets and missing transverse momentum at*\( \sqrt{s}=13 \)*TeV with the ATLAS detector*,*Phys. Rev.***D 96**(2017)112010 [arXiv:1708.08232] [INSPIRE]. - [31]ATLAS collaboration,
*Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in*\( \sqrt{s}=13 \)*TeV pp collisions with the ATLAS detector*,*Eur. Phys. J.***C 78**(2018) 625 [arXiv:1805.11381] [INSPIRE]. - [32]CMS collaboration,
*Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at*\( \sqrt{s}=13 \)*TeV*,*Phys. Lett.***B 782**(2018) 440 [arXiv:1801.01846] [INSPIRE]. - [33]P. Minkowski,
*μ*→*eγ at a rate of one out of*10^{9}*muon decays?*,*Phys. Lett.***B 67**(1977) 421 [INSPIRE]. - [34]T. Yanagida,
*Horizontal gauge symmetry and masses of neutrinos*,*Conf. Proc.***C 7902131**(1979) 95 [INSPIRE]. - [35]O. Sawada and A. Sugamoto eds.,
*Proceedings: workshop on the unified theories and the baryon number in the universe*, Natl. Lab. High Energy Phys., Tsukuba, Japan (1979) [INSPIRE]. - [36]M. Lévy, J.L. Basdevant, D. Speiser, J. Weyers, R. Gastmans and M. Jacob eds.,
*Quarks and leptons. Proceedings, summer institute, Cargèse, France,*9*–*29*July*1979,*NATO Sci. Ser.***B 61**(1980)1 [INSPIRE]. - [37]P. Van Nieuwenhuizen and D.Z. Freedman eds.,
*Supergravity. Proceedings, workshop at Stony Brook,*27*–*29*September*1979, North-Holland, Amsterdam, The Netherlands (1979) [INSPIRE]. - [38]R.N. Mohapatra and G. Senjanović,
*Neutrino mass and spontaneous parity nonconservation*,*Phys. Rev. Lett.***44**(1980) 912 [INSPIRE].ADSCrossRefGoogle Scholar - [39]D. Chang, R.N. Mohapatra and M.K. Parida,
*Decoupling parity and*SU(2)_{R}*breaking scales: a new approach to left-right symmetric models*,*Phys. Rev. Lett.***52**(1984) 1072 [INSPIRE].ADSCrossRefGoogle Scholar - [40]NNPDF collaboration,
*Parton distributions for the LHC run II*,*JHEP***04**(2015) 040 [arXiv:1410.8849] [INSPIRE]. - [41]NNPDF collaboration,
*Parton distributions with QED corrections*,*Nucl. Phys.***B 877**(2013) 290 [arXiv:1308.0598] [INSPIRE]. - [42]A.D. Martin, R.G. Roberts, W.J. Stirling and R.S. Thorne,
*Parton distributions incorporating QED contributions*,*Eur. Phys. J.***C 39**(2005) 155 [hep-ph/0411040] [INSPIRE]. - [43]C. Schmidt, J. Pumplin, D. Stump and C.P. Yuan,
*CT*14*QED parton distribution functions from isolated photon production in deep inelastic scattering*,*Phys. Rev.***D 93**(2016) 114015 [arXiv:1509.02905] [INSPIRE].ADSGoogle Scholar - [44]A. Alloul, N.D. Christensen, C. Degrande, C. Duhr and B. Fuks,
*FeynRules*2*.*0*— a complete toolbox for tree-level phenomenology*,*Comput. Phys. Commun.***185**(2014) 2250 [arXiv:1310.1921] [INSPIRE]. - [45]N.D. Christensen and C. Duhr,
*FeynRules — Feynman rules made easy*,*Comput. Phys. Commun.***180**(2009) 1614 [arXiv:0806.4194] [INSPIRE].ADSCrossRefGoogle Scholar - [46]J. Alwall et al.,
*The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations*,*JHEP***07**(2014) 079 [arXiv:1405.0301] [INSPIRE].ADSCrossRefGoogle Scholar - [47]R.D. Ball et al.,
*Parton distributions with LHC data*,*Nucl. Phys.***B 867**(2013) 244 [arXiv:1207.1303] [INSPIRE].ADSCrossRefGoogle Scholar - [48]J. Alwall, M. Herquet, F. Maltoni, O. Mattelaer and T. Stelzer,
*MadGraph*5*: going beyond*,*JHEP***06**(2011) 128 [arXiv:1106.0522] [INSPIRE].ADSCrossRefzbMATHGoogle Scholar - [49]T. Sjöstrand, S. Mrenna and P.Z. Skands,
*PYTHIA*6*.*4*physics and manual*,*JHEP***05**(2006) 026 [hep-ph/0603175] [INSPIRE]. - [50]DELPHES 3 collaboration,
*DELPHES*3*, a modular framework for fast simulation of a generic collider experiment*,*JHEP***02**(2014) 057 [arXiv:1307.6346] [INSPIRE]. - [51]CMS collaboration,
*Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets*,*Phys. Rev. Lett.***114**(2015) 051801 [arXiv:1410.6315] [INSPIRE]. - [52]J.M. Campbell and R.K. Ellis,
*An update on vector boson pair production at hadron colliders*,*Phys. Rev.***D 60**(1999) 113006 [hep-ph/9905386] [INSPIRE]. - [53]F. Campanario, V. Hankele, C. Oleari, S. Prestel and D. Zeppenfeld,
*QCD corrections to charged triple vector boson production with leptonic decay*,*Phys. Rev.***D 78**(2008) 094012 [arXiv:0809.0790] [INSPIRE].ADSGoogle Scholar - [54]M.V. Garzelli, A. Kardos, C.G. Papadopoulos and Z. Trócsányi, \( t\overline{t}{W}^{\pm } \)
*and*\( t\overline{t}Z \)*hadroproduction at NLO accuracy in QCD with parton shower and hadronization effects*,*JHEP***11**(2012) 056 [arXiv:1208.2665] [INSPIRE]. - [55]LHC Higgs Cross Section Working Group collaboration,
*Handbook of LHC Higgs cross sections:*3*. Higgs properties*, arXiv:1307.1347 [INSPIRE]. - [56]Y.-B. Shen, R.-Y. Zhang, W.-G. Ma, X.-Z. Li, Y. Zhang and L. Guo,
*NLO QCD + NLO EW corrections to WZZ productions with leptonic decays at the LHC*,*JHEP***10**(2015) 186 [*Erratum ibid.***10**(2016) 156] [arXiv:1507.03693] [INSPIRE]. - [57]D.T. Nhung, L.D. Ninh and M.M. Weber,
*NLO corrections to WWZ production at the LHC*,*JHEP***12**(2013) 096 [arXiv:1307.7403] [INSPIRE].ADSCrossRefGoogle Scholar - [58]A. Bredenstein, A. Denner, S. Dittmaier and S. Pozzorini,
*NLO QCD corrections to*\( pp\to t\overline{t}b\overline{b}+X \)*at the LHC*,*Phys. Rev. Lett.***103**(2009) 012002 [arXiv:0905.0110] [INSPIRE].ADSCrossRefGoogle Scholar - [59]G. Bevilacqua and M. Worek,
*Constraining BSM physics at the LHC: four top final states with NLO accuracy in perturbative QCD*,*JHEP***07**(2012) 111 [arXiv:1206.3064] [INSPIRE].ADSCrossRefGoogle Scholar - [60]G. Cowan,
*Two developments in discovery tests: use of weighted Monte Carlo events and an improved measure of experimental sensitivity*, talk given during the meeting on Progress on Statistical Issues in Searches, http://www-conf.slac.stanford.edu/statisticalissues2012/talks/glen_cowan_slac_4jun12.pdf, SLAC, Menlo Park, CA, U.S.A. 4–6 June 2012. - [61]N. Kumar and S.P. Martin,
*Vectorlike leptons at the Large Hadron Collider*,*Phys. Rev.***D 92**(2015) 115018 [arXiv:1510.03456] [INSPIRE]. - [62]V.E. Ozcan, S. Sultansoy and G. Unel,
*Possible discovery channel for new charged leptons at the LHC*,*J. Phys.***G 36**(2009) 095002 [*Erratum ibid.***G 37**(2010) 059801] [arXiv:0903.3177] [INSPIRE].