Decomposition of d = 9 short-range 0νββ decay operators at one-loop level

Chen, Ping-Tao; Ding, Gui-Jun; Yao, Chang-Yuan

doi:10.1007/jhep12(2021)169

Cited by 12 publications

(10 citation statements)

References 47 publications

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“…One can determine the transformations of the internal fields under SM gauge group by imposing gauge invariance at each vertex, the SU (3) C , SU (2) L representations and hypercharge U (1) Y assignments can be unambiguously fixed in tree-level realizations while there are an infinite number of UV completions at one-loop level. The complete list of the models together with the internal fields and their quantum numbers are given in the supplementary file [32], where the SU (2) L and SU (3) C representations with dimensions less than 4 and 10 respectively are considered.…”

Section: Discussionmentioning

confidence: 99%

“…The SU (3) C quantum numbers of the internal fields can be discussed at the topology level as well. We list the possible color charge assignments of the topology N-1-1 in table 3, where the SU (3) C representations up to dimension 6 are considered due to limited space and the results including octet assignment are given in the attachment [32]. The labels of the fields and the color flow of the topology N-1-1 are shown in figure 6.…”

Section: Assign Su (3) C Transformationmentioning

confidence: 99%

“…Therefore the genuineness of the one-loop model N1-1-1-1-2-1-1 requires α = ±1. The condition of genuineness has been considered for each possible one-loop decomposition of the 0νββ decay operators, see the attachment for the full results [32].…”

Section: Determine Genuinenessmentioning

confidence: 99%

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Decomposition of $d=9$ short-range $0νββ$ decay operators at one-loop level

Chen,

Ding,

Yao

2021

Preprint

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We perform a systematical study of the dimension-9 short-range 0νββ decay operators at one-loop level. There are only six genuine topologies which generate eight diagrams, and the recipe to identify the possible one-loop realizations of the 0νββ decay operators is sketched. Certain hypercharge assignments are excluded by the absence of tree-level diagrams in a genuine one-loop model. The mediators of each decomposition can generate Majorana neutrino masses which are discussed up to two-loop level. We present an example of 0νββ decay model in which the neutrino masses are generated at two-loop level, and the short-range contribution can be comparable with the mass mechanism in some region of parameter space.

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Section: Discussionmentioning

confidence: 99%

Section: Assign Su (3) C Transformationmentioning

confidence: 99%

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Decomposition of $d=9$ short-range $0νββ$ decay operators at one-loop level

Chen,

Ding,

Yao

2021

Preprint

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“…The systematic decomposition of 0νββ-decay operators with the possible realizations are sketched in Refs. [23,33]. We will particularly pay attention to the UV realization of a class of 0νββ-decay operators which are suppressed at hadron-level in chiral power counting, but are potentially accessible at colliders and next-generation 0νββ-decay experiments and give small contributions to the neutrino masses.…”

Section: Model and 0νββ Decaymentioning

confidence: 99%

Uncovering a chirally suppressed mechanism of $0νββ$ decay with LHC searches

Graesser¹,

Li²,

Ramsey-Musolf³

et al. 2022

Preprint

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∆L = 2 lepton number violation (LNV) at the TeV scale could provide an alternative interpretation of positive signal(s) in future neutrinoless double beta (0νββ) decay experiments. An interesting class of models from this point of view are those that at low energies give rise to dimension-9 vector operators and a dimension-7 operator, both of whose 0νββ-decay rates are "chirally suppressed". We study and compare for the first time the sensitivities of 0νββ-decay experiments and LHC searches to a simplified model in this class of TeV-scale LNV. Due to the chiral suppression of the vector operators, 0νββ-decay searches are found to be less constraining than LHC searches. For the chirally suppressed dimension-7 operator generated by TeV-scale mediators, in contrast, 0νββ-decay searches place strong constraints on the size of the new Yukawa coupling. Signals of this model at the LHC and 0νββ-decay experiments are entirely uncorrelated with the observed neutrinos masses, as these new sources of LNV give negligible contributions to the latter. We find the prospects for the high-luminosity LHC and ton-scale 0νββ-decay experiments to uncover the chirally-suppressed mechanism with TeV-scale LNV to be promising. We also comment on the sensitivity of the 0νββ-decay lifetime to certain unknown low-energy constants that in the case of dimension-9 scalar operators are expected to be large due to non-perturbative renormalization.

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“…Various possibilities of such types of the models that can induce the 0ν2β decay have been considered [27,28,29,30,31,32,33,34]. The doubly charged scalar couplings to the leptons can carry lepton flavor numbers, and therefore, the Mu-to-Mu transition can be also induced via the doubly charged scalar exchange [35,36] in those models.…”

Section: Introductionmentioning

confidence: 99%

Neutrinoless double beta decay and the muonium-to-antimuonium transition in models with a doubly charged scalar

Fukuyama¹,

Mimura²,

Uesaka³

2022

Preprint

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The lepton number and flavor violations are important possible ingredients of the lepton physics. The neutrinoless double beta decay and the transition of the muonium into antimuonuim are related to those violations. The former can give us an essential part of fundamental physics, and there are plenty of experimental attempts to observe the process. The latter has also been one of the attractive phenomena, and the experimental bound will be updated in planned experiments at new high-intensity muon beamlines. In models with a doubly charged scalar, not only those two processes can be induced, but also the active neutrino masses can be induced radiatively. The flavor violating decays of the charged leptons constrain the flavor parameters of the models. We study how the muonium-to-antimuonium transition rate can be as large as the current experimental bound, and we insist that the updated bound of the transition rate will be useful to distinguish the models to generate the neutrinoless double beta decay via the doubly charged scalar. We also study a possible extension of the model to the left-right model which can induce the neutrinoless double beta decay.

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Decomposition of d = 9 short-range 0νββ decay operators at one-loop level

Cited by 12 publications

References 47 publications

Decomposition of $d=9$ short-range $0νββ$ decay operators at one-loop level

Decomposition of $d=9$ short-range $0νββ$ decay operators at one-loop level

Uncovering a chirally suppressed mechanism of $0νββ$ decay with LHC searches

Neutrinoless double beta decay and the muonium-to-antimuonium transition in models with a doubly charged scalar

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