Quark lepton unification in higher dimensions

Li, Tianjun; Murdock, Z.; Nandi, S.; Kumar, Santosh

doi:10.1103/physrevd.85.076010

Cited by 7 publications

(6 citation statements)

References 57 publications

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“…Such colored particles are predicted in many class of BSM theories. Resonant s-channel production at LHC can happen for squarks in R-Parity violating supersymmetric theories [3], diquarks in super-string inspired E 6 grand unification models [4] or models with extended gauge symmetries [5][6][7], color-octet vectors such as axigluons [8,9] and colorons [10][11][12][13][14], models with color-triplet [15], color-sextet [16][17][18] or color-octet scalars [19,20]. The absence of any such observation in the existing data put strong limits on such particle masses, from pair production of such states, or more strongly from resonant searches of new physics exchanged in the s-channel [21].…”

Section: Jhep10(2015)122mentioning

confidence: 99%

NLO QCD corrections to the resonant vector diquark production at the LHC

Das

Majhi

Kumar

et al. 2015

J. High Energ. Phys.

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With the upcoming run of the Large Hadron Collider (LHC) at much higher center of mass energies, the search for Beyond Standard Model (BSM) physics will again take center stage. New colored particles predicted in many BSM scenarios are expected to be produced with large cross sections thus making them interesting prospects as a doorway to hints of new physics. We consider the resonant production of such a colored particle, the diquark, a particle having the quantum number of two quarks. The diquark can be either a scalar or vector. We focus on the vector diquark which has much larger production cross section compared to the scalar ones. In this work we calculate the next-to-leading order (NLO) QCD corrections to the on-shell vector diquark production at the LHC produced through the fusion of two quarks as well as the NLO corrections to its decay width. We present full analytic results for the one-loop NLO calculation and do a numerical study to show that the NLO corrections can reduce the scale uncertainties in the cross sections which can be appreciable and therefore modify the expected search limits for such particles. We also use the dijet result from LHC to obtain current limits on the mass and coupling strengths of the vector diquarks.

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Section: Jhep10(2015)122mentioning

confidence: 99%

NLO QCD corrections to the resonant vector diquark production at the LHC

Das

Majhi

Kumar

et al. 2015

J. High Energ. Phys.

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“…Other than in extra dimensional theories, vectorlike quarks appear in many new-physics models such as composite Higgs models [2][3][4][5], little Higgs models [6][7][8][9], some supersymmetric extensions [10][11][12], quark-lepton unification models [13] etc. Extensive studies on vectorlike fermions are available in the literature.…”

Section: Jhep08(2014)079mentioning

confidence: 99%

LHC signatures of warped-space vectorlike quarks

Gopalakrishna

Mandal

Mitra

et al. 2014

J. High Energ. Phys.

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Abstract:We study the LHC signatures of TeV scale vectorlike quarks b ′ , t ′ and χ with electromagnetic charges −1/3, 2/3 and 5/3 that appear in many beyond the standard model (BSM) extensions. We consider warped extra-dimensional models and analyze the phenomenology of such vectorlike quarks that are the custodial partners of third generation quarks. In addition to the usually studied pair-production channels which depend on the strong coupling, we put equal emphasis on single production channels that depend on electroweak couplings and on electroweak symmetry breaking induced mixing effects between the heavy vectorlike quarks and standard model quarks. We identify new promising gg-initiated pair and single production channels and find the luminosity required for discovering these states at the LHC. For these channels, we propose a cut that allows one to extract the relevant electroweak couplings. Although the motivation is from warped models, we present many of our results model-independently.

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“…Unlike the SM fermions, the left-and right-chiral components of VLLs transform identically under the SM gauge symmetry. Some beyond SM extensions where such exotic fermions appear naturally are grand unified theories [3][4][5][6], theories with non-minimal supersymmetric extensions [7][8][9][10][11][12][13], warped or universal extra-dimension [14][15][16][17][18][19][20][21][22], composite Higgs model [23][24][25][26][27][28][29] and little Higgs model [30][31][32][33][34]. The phenomenology of additional VLLs is expected to be similar to excited leptons or can differ if the model predicts additional particles in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

Signals for vector-like leptons in an $S_3$-symmetric 2HDM at ILC

Chakraborty,

Ghosh,

Ghosh

et al. 2022

Preprint

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In this work, we explore the signals of an S 3 -symmetric two Higgs doublet model with two generations of vector-like leptons (VLLs) at the proposed International Linear Collider (ILC). The lightest neutral component of the VLL in this model provides a viable DM candidate satisfying the current relic density data as well as circumventing all direct and indirect DM search constraints. Some representative benchmark points have been selected with low, medium and high DM masses, satisfying all theoretical and experimental constraints of the model and constraints coming from the DM sector. The VLLs (both neutral and charged) will be produced in pair leading to multilepton and multi-jet final states. We show that the ILC will prove to be a much more efficient and useful machine to hunt for such signals compared to LHC. Using traditional cut-based analysis as well as sophisticated multivariate analysis, we perform a detailed analysis of some promising channels containing mono-lepton plus di-jet, di-lepton, four-lepton and four jets along with missing transverse energy in the final state at 1 TeV ILC.

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Quark lepton unification in higher dimensions

Cited by 7 publications

References 57 publications

NLO QCD corrections to the resonant vector diquark production at the LHC

NLO QCD corrections to the resonant vector diquark production at the LHC

LHC signatures of warped-space vectorlike quarks

Signals for vector-like leptons in an $S_3$-symmetric 2HDM at ILC

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