Flavor changing neutral currents, an extended scalar sector, and the Higgs production rate at the CERN Large Hadron Collider

Manohar, Aneesh V.; Wise, Mark B.

doi:10.1103/physrevd.74.035009

Cited by 169 publications

(171 citation statements)

References 27 publications

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“…Color-octet weak-doublet scalars of this type have been discussed in ref. [20,21]. In our case the flavor structure of their interactions is different, predominately involving a 3rd generation left-handed quark and a right-handed quark of any generation.…”

Section: Jhep08(2008)100mentioning

confidence: 97%

Quark and lepton masses from top loops

Dobrescu

Fox

2008

J. High Energy Phys.

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Assuming that the leptons and quarks other than top are massless at tree level, we show that their masses may be induced by loops involving the top quark. As a result, the generic features of the fermion mass spectrum arise from combinations of loop factors. Explicitly, we construct a renormalizable model involving a few new particles, which leads to 1-loop bottom and tau masses, a 2-loop charm mass, 3-loop muon and strange masses, and 4-loop masses for first generation fermions. This realistic pattern of masses does not require any symmetry to differentiate the three generations of fermions. The new particles may produce observable effects in future experiments searching for µ → e conversion in nuclei, rare meson decays, and other processes.

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Section: Jhep08(2008)100mentioning

confidence: 97%

Quark and lepton masses from top loops

Dobrescu

Fox

2008

J. High Energy Phys.

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“…These gauge charges imply that G H is electrically neutral, and does not have any renormalizable interactions with the quarks and leptons (note that G HbL b R does not arise from an SU(2) W invariant Yukawa interaction; the opposite is true in the case of weak-doublet scalar octets [16][17][18]). We refer to G H as a scalar octet, independently of whether it is a composite (as in technicolor) or elementary particle.…”

Section: Jhep07(2011)100mentioning

confidence: 99%

Heavy octets and Tevatron signals with three or four b jets

Bai

Dobrescu

2011

J. High Energ. Phys.

107

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Hypothetical color-octet particles of spin 0, pair-produced at hadron colliders through their QCD coupling, may lead to final states involving three or four b jets. The scalar octets may also be resonantly produced in pairs via a spin-1 octet, as we show within a renormalizable coloron model. We analyze kinematic distributions of the 3b final state that differentiate between these two production mechanisms, as well as between scalar octets and supersymmetric Higgs bosons. A scalar octet of mass in the 140-150 GeV range can explain the nonstandard shape of the b-jet transverse energy distributions reported by the CDF Collaboration, especially when the coloron mass is slightly above twice the scalar mass. The dominant decay mode of the scalar octet in that case is into a pair of gluons, so that the production of a pair of dijet resonances is large in this model, of about 40 pb at the Tevatron. Even when a W boson is radiated from the initial state, the inclusive cross section for producing a dijet resonance near the scalar octet mass remains sizable, around 0.15 pb.

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“…As for the color-octet scalar states, we note that the renormalizable interactions between a color-octet scalar and two quarks are Yukawa type interactions, and the SM gauge invariant interactions require the scalar to be a doublet [54] under SU(2) L . Once again, due to the assumption of MFV, their couplings to light quarks would be small, and the only significant coupling would be to the top or bottom quarks.…”

Section: ⊗3mentioning

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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Flavor changing neutral currents, an extended scalar sector, and the Higgs production rate at the CERN Large Hadron Collider

Cited by 169 publications

References 27 publications

Quark and lepton masses from top loops

Quark and lepton masses from top loops

Heavy octets and Tevatron signals with three or four b jets

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

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