Flavour anomalies from a split dark sector

Fedele, Marco; Kowalska, Kamila; Sessolo, Enrico Maria

doi:10.1007/jhep08(2020)148

Cited by 23 publications

(34 citation statements)

References 86 publications

(137 reference statements)

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“…In a similar direction, studies are available in the literature with a heavy U(1) X gauge boson [27][28][29][30][31][32][33][34][35]. While such models with heavy U(1) X gauge boson have been extensively studied, there have been very few studies on low mass regions [36][37][38][39][40]. However, our working model is very much different compared to the one discussed in the references mentioned above and we also correlate the flavour anomalies with origin of neutrino mass and dark matter.…”

Section: Introductionmentioning

confidence: 81%

Low scale U(1)X gauge symmetry as an origin of dark matter, neutrino mass and flavour anomalies

Borah

Mukherjee

Nandi

2020

J. High Energ. Phys.

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We study a generic leptophilic U(1)X extension of the standard model with a light gauge boson. The U(1)X charge assignments for the leptons are guided by lepton universality violating (LUV) observables in semileptonic b → sℓℓ decays, muon anomalous magnetic moment and the origin of leptonic masses and mixing. Anomaly cancellation conditions require the addition of new chiral fermions in the model, one of which acts as a dark matter (DM) candidate when it is stabilised by an additional $$ {\mathcal{Z}}_2 $$ Z 2 symmetry. From our analysis, we show two different possible models with similar particle content that lead to quite contrasting neutrino mass origin and other phenomenology. The proposed models also have the potential to address the anomalous results in b → cℓνℓ decays like R(D), R(D∗), electron anomalous magnetic moment and the very recent KOTO anomaly in the kaon sector. We also discuss different possible collider signatures of our models which can be tested in future.

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Section: Introductionmentioning

confidence: 81%

Low scale U(1)X gauge symmetry as an origin of dark matter, neutrino mass and flavour anomalies

Borah

Mukherjee

Nandi

2020

J. High Energ. Phys.

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“…This measurement could indicate new interactions coupling preferably to leptons of the second and third generation. In many models proposed to address the muon g − 2 measurement, FCNC (Flavor Changing Neutral Current) decays of the b quark are generated with the involvement of either SM particles [205,206] or new particles [207][208][209][210][211]. These new FCNC contributions may resolve the B anomalies in the measurement of the semileptonic b → s decays.…”

Section: Leptonic Force Mediatorsmentioning

confidence: 99%

New Physics Searches at Kaon and Hyperon Factories

Goudzovski¹,

Redigolo²,

Tobioka³

et al. 2022

Preprint

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Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons benefit from their small total decay widths and the availability of very large datasets. On the other hand, useful complementary information is provided by hyperon decay measurements. We summarize the relevant phenomenological models and the status of the searches in a comprehensive list of kaon and hyperon decay channels. We identify new search strategies for under-explored signatures, and demonstrate that the improved sensitivities from current and nextgeneration experiments could lead to a qualitative leap in the exploration of light dark sectors.

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“…Because all these solutions, except the Z one, involve charged particles they must be realized at the electroweak scale, or even significantly above, due to the constraints from direct searches. However, a Z boson can be light and, in fact, such solutions to the b → s + − anomalies have been proposed and studied in the literature [108][109][110][111][112][113][114][115]. Importantly, this is the only NP model addressing the b → s + − anomalies which predicts R(K ( * ) ) > 0 in the high q 2 bins, i.e.…”

Section: Introductionmentioning

confidence: 99%

Towards excluding a light $Z^\prime$ explanation of $b\to s\ell^+\ell^-$

Crivellin¹,

Manzari²,

Altmannshofer³

et al. 2022

Preprint

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The discrepancies between b → s + − data and the corresponding Standard Model predictions constitute the most significant hints for new physics (at the TeV scale or below) currently available. In fact, many scenarios that can account for these anomalies have been proposed in the literature. However, only a single light new physics explanation, i.e. with a mass below the B meson scale, is possible: a light Z boson. In this article, we point out that improved limits on B → K ( * ) νν, including the experimental sensitivities required for a proper treatment of the necessarily sizeable Z width, together with the forthcoming Belle II analyses of e + e − → µ + µ − + invisible, can rule out a Z explanation of b → s + − data with a mass below ≈ 4 GeV. Importantly, such a light Z is the only viable single particle solution to the b → s + − anomalies predicting R(K ( * ) ) > 0 in high q 2 bins, therefore providing an essential consistency test of data.

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Flavour anomalies from a split dark sector

Cited by 23 publications

References 86 publications

Low scale U(1)X gauge symmetry as an origin of dark matter, neutrino mass and flavour anomalies

Low scale U(1)X gauge symmetry as an origin of dark matter, neutrino mass and flavour anomalies

New Physics Searches at Kaon and Hyperon Factories

Towards excluding a light $Z^\prime$ explanation of $b\to s\ell^+\ell^-$

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