Scalar-mediated double beta decay and LHC

Gonzales, L. A.; Helo, Juan Carlos; Hirsch, Martin; Kovalenko, Sergey

doi:10.48550/arxiv.1606.09555

Cited by 2 publications

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“…(For a recent global fit of all oscillation data see, for example [6].) Rough estimates of the LHC reach, compared with the sensitivity of current and future double beta decay experiments, have been made in [7][8][9]. In this paper, we study LHC signals for a particularly simple LNV extension of the SM.…”

Section: Introductionmentioning

confidence: 99%

“…This model generates neutrino masses at 2-loop order and, thus, one expects the masses of the exotic particles of this model to be at least partially within reach of the LHC. Different from previous papers [7][8][9], here we perform a full detector simulation and background study, in order to give more realistic estimates for future LHC sensitvities.…”

Section: Introductionmentioning

confidence: 99%

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Exotic colored fermions and lepton number violation at the LHC

et al. 2019

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Majorana neutrino mass models with a scale of lepton number violation (LNV) of order TeV potentially lead to signals at the LHC. Here, we consider an extension of the standard model with a coloured octet fermion and a scalar leptoquark. This model generates neutrino masses at 2-loop order. We make a detailed MonteCarlo study of the LNV signal at the LHC in this model, including a simulation of standard model backgrounds. Our forecast predicts that the LHC with 300/fb should be able to probe this model up to colour octet fermion masses in the range of (2.6-2.7) TeV, depending on the lepton flavour of the final state.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exotic colored fermions and lepton number violation at the LHC

et al. 2019

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“…For the short-range mechanisms, SRM, the experimental limits imply typical masses of heavy intermediate particles and an LNV scale Λ LN V in the ballpark of (a few) TeV. Therefore, the LHC could possibly provide a cross-check whether or not these contributions can be dominant in 0νββ-decay [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

QCD-improved limits from neutrinoless double beta decay

et al. 2017

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We analyze the impact of QCD corrections on limits derived from neutrinoless double beta decay (0νββ). As demonstrated previously, the effect of the color-mismatch arising from loops with gluons linking the quarks from different color-singlet currents participating in the effective operators has a dramatic impact on the predictions for some particular Wilson coefficients. Here, we consider all possible contributions from heavy particle exchange, i.e. the so-called short-range mechanism of 0νββ decay. All high-scale models (HSM) in this class match at some scale around a ∼ few TeV with the corresponding effective theory, containing a certain set of effective dimension-9 operators. Many of these HSM receive contributions from more than one of the basic operators and we calculate limits on these models using the latest experimental data. We also show with one non-trivial example, how to derive limits on more complicated models, in which many different Feynman diagrams contribute to 0νββ decay, using our general method.

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Scalar-mediated double beta decay and LHC

Cited by 2 publications

References 0 publications

Exotic colored fermions and lepton number violation at the LHC

Exotic colored fermions and lepton number violation at the LHC

QCD-improved limits from neutrinoless double beta decay

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