Color sextet vector bosons and same-sign top quark pairs at the LHC

Zhang, Hao; Berger, Edmond L.; Cao, Qing; Chen, Chuan Ren; Shaughnessy, Gabe

doi:10.1016/j.physletb.2010.12.005

Cited by 31 publications

(26 citation statements)

References 37 publications

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“…The vector states, on the other hand, are more exotic in terms of connections with an underlying model. There has been previous interest in the resonant production of diquark scalars and vectors at the LHC [43][44][45][46].…”

Section: Jhep12(2010)085mentioning

confidence: 99%

Colored resonant signals at the LHC: largest rate and simplest topology

Han

Lewis

Liu

2010

J. High Energ. Phys.

149

119

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Abstract:We study the colored resonance production at the LHC in a most general approach. We classify the possible colored resonances based on group theory decomposition, and construct their effective interactions with light partons. The production cross section from annihilation of valence quarks or gluons may be on the order of 400 − 1000 pb at LHC energies for a mass of 1 TeV with nominal couplings, leading to the largest production rates for new physics at the TeV scale, and simplest event topology with dijet final states. We apply the new dijet data from the LHC experiments to put bounds on various possible colored resonant states. The current bounds range from 0.9 to 2.7 TeV. The formulation is readily applicable for future searches including other decay modes.

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Section: Jhep12(2010)085mentioning

confidence: 99%

Colored resonant signals at the LHC: largest rate and simplest topology

Han

Lewis

Liu

2010

J. High Energ. Phys.

149

119

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“…Examples include two Higgs doublet models [1][2][3], left-right extensions of the SM [4], models with a color sextet or color octet [5][6][7][8][9][10], and models with composite particles . NP that couples strongly to top quarks might manifest itself as heavy resonant states that can be produced at the LHC.…”

Section: Introductionmentioning

confidence: 99%

Probing TeV scale top-philic resonances with boosted top-tagging at the high luminosity LHC

et al. 2016

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We investigate the discovery potential of singly produced top-philic resonances at the high luminosity (HL) LHC in the four-top final state. Our analysis spans over the fully hadronic, semileptonic, and samesign dilepton channels where we present concrete search strategies adequate to a boosted kinematic regime and high jet-multiplicity environments. We utilize the template overlap method with newly developed template observables for tagging boosted top quarks, a large-radius jet variable M J , and customized b-tagging tactics for background discrimination. Our results show that the same-sign dilepton channel gives the best sensitivity among the considered channels, with an improvement of significance up to 10%-20% when combined with boosted top-tagging. Both the fully hadronic and semileptonic channels yield comparable discovery potential and contribute to further enhancements in the sensitivity by combining all channels. Finally, we show the sensitivity of a top-philic resonance at the LHC and HL-LHC by showing the 2σ exclusion limit and 5σ discovery reach, including a combination of all three channels.

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“…The fact that LHC being a protonproton collider will have valence quarks in much abundance compared to the anti-quarks, helps in producing the diquark as a resonance through qq fusion. A lot of studies carried out at LO exist in the literature for such diquarks and their resonant effects in the dijet signal [31][32][33][34][35][36][37][38], pair production of top quarks [39][40][41][42] and single top quark production at the LHC [43,44]. The one-loop NLO correction for scalar diquark production was considered in ref.…”

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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Color sextet vector bosons and same-sign top quark pairs at the LHC

Cited by 31 publications

References 37 publications

Colored resonant signals at the LHC: largest rate and simplest topology

Colored resonant signals at the LHC: largest rate and simplest topology

Probing TeV scale top-philic resonances with boosted top-tagging at the high luminosity LHC

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

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