Scalar representations and minimal flavor violation

Minimal Flavour Violation hypothesis can provide an attractive framework for Dark Matter (DM). We consider scalar DM candidates carrying flavour quantum numbers and whose representation under the flavour group guarantees DM stability. They interact with the Standard Model fields through Higgs portal at renormalisable level and also to quarks through dimension-6 operators. We provide a systematic analysis of the viable parameter space for the DM fields, which are triplet of the flavour group, considering several DM-quark interactions. In this framework, we analyse in which cases the viable parameter space differs from Higgs portal models thanks to the underlying flavour structure. In contrast to minimal Higgs portal scenarios, we find that light DM in the GeV mass range as well as heavier candidates above Higgs resonance could be allowed by colliders, direct and indirect DM detection searches as well as flavour constraints. The large mass regime above m t could even be beyond the reach of future experiments such as Xenon 1T.

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“…[68][69][70]) and the DM field representation under G f is chosen in order to prevent DM decay into SM particles. Following the approach of Ref.…”

Section: G F = Su(3) Q L × Su(3) U R × Su(3) D Rmentioning

confidence: 99%

Dark matter within the minimal flavour violation ansatz

Lopez-Honorez

Merlo

2013

Physics Letters B

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“…A commonly adopted solution is the "minimal flavor violation" (MFV) [37,38]. This assumption makes the couplings align with the SM Yukawa matrices, and they only become significant when involving heavier quarks such as the top [39]. In some specific model realizations, the MFV is not necessary and certain individual operators involving light flavors can be sizable [40].…”

Section: Jhep12(2010)085mentioning

confidence: 99%

“…We do not introduce additional couplings for those new colored states and thus the baryon number is conserved. In fact, the baryon number can be made a conserved quantum number for the above interactions by the SM gauge symmetry along with a simple extension to the lepton sector [39].…”

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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“…The scalar and vector fields that can couple to the SM at dimension four respecting SM gauge symmetry and not breaking G F have recently been classified and studied in some detail [9][10][11]. In this paper, we examine oblique electroweak precision data (EWPD) corrections due to the flavor symmetric vector field multiplets of this form in much more detail.…”

Section: Jhep11(2011)139mentioning

confidence: 99%

EWPD constraints on flavor symmetric vector fields

Grinstein

Murphy

Trott

2011

J. High Energ. Phys.

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Electroweak precision data constraints on flavor symmetric vector fields are determined. The flavor multiplets of spin one that we examine are the complete set of fields that couple to quark bi-linears at tree level while not initially breaking the quark global flavor symmetry group. Flavor safe vector masses proximate to, and in some cases below, the electroweak symmetry breaking scale are found to be allowed. Many of these fields provide a flavor safe mechanism to explain the tt forward backward anomaly, and can simultaneously significantly raise the allowed values of the Standard Model Higgs mass consistent with electroweak precision data.

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Scalar representations and minimal flavor violation

Cited by 56 publications

References 68 publications

Dark matter within the minimal flavour violation ansatz

Dark matter within the minimal flavour violation ansatz

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

EWPD constraints on flavor symmetric vector fields

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