$R({K^{(*)}})$ from dark matter exchange

James M. Cline; Jonathan M. Cornell

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$R({K^{(*)}})$ from dark matter exchange

James M. Cline, Jonathan M. Cornell

High Energy Physics - Phenomenology · Submitted 29 Nov 2017

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We explore the constraints on this model from flavor observables, dark matter direct detection, and LHC run II searches, and find that, while currently viable, this scenario will be directly tested by future results from all three probes.

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Hints of lepton flavor violation have been observed by LHCb in the rate of the decay $B\to K\mu^+\mu^-$ relative to that of $B\to K e^+e^-$. This can be explained by new scalars and fermions which couple to standard model particles and contribute to these processes at loop level. We explore a simple model of this kind, in which one of the new fermions is a dark matter candidate, while the other is a heavy vector-like quark and the scalar is an inert Higgs doublet. We explore the constraints on this model from flavor observables, dark matter direct detection, and LHC run II searches, and find that, while currently viable, this scenario will be directly tested by future results from all three probes.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	Hints of lepton flavor violation have been observed by LHCb in the rate of the decay $B\to K\mu^+\mu^-$ relative to that of $B\to K e^+e^-$.	background 1.00	0.06	0.03	asserted 0.64
s1	This can be explained by new scalars and fermions which couple to standard model particles and contribute to these processes at loop level.	background 0.85	0.06	0.06	hedged possibility 0.69
s2	We explore a simple model of this kind, in which one of the new fermions is a dark matter candidate, while the other is a heavy vector-like quark and the scalar is an inert Higgs doublet.	method 0.57	0.64	0.06	asserted 0.93
s3	We explore the constraints on this model from flavor observables, dark matter direct detection, and LHC run II searches, and find that, while currently viable, this scenario will be directly tested by future results from all three probes.	result 0.78	0.95	0.82	asserted 0.99

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from analysis of existing data 0.47.

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The paper

Original abstract

Hints of lepton flavor violation have been observed by LHCb in the rate of the decay $B\to K\mu^+\mu^-$ relative to that of $B\to K e^+e^-$. This can be explained by new scalars and fermions which couple to standard model particles and contribute to these processes at loop level. We explore a simple model of this kind, in which one of the new fermions is a dark matter candidate, while the other is a heavy vector-like quark and the scalar is an inert Higgs doublet. We explore the constraints on this model from flavor observables, dark matter direct detection, and LHC run II searches, and find that, while currently viable, this scenario will be directly tested by future results from all three probes.

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References

Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Perturbative unitarity constraints on generic Yukawa interactions
hep-ph 2021-07 accept novelty 6.0 of 10

Generic Yukawa couplings have compact perturbative-unitarity upper bounds set by their SU(N) representations, and models explaining the muon g-2 and B anomalies require couplings near that edge.
Muon $g-2$ and $B$-anomalies from Dark Matter
hep-ph 2021-04 conditional novelty 5.0 of 10

A systematic classification of minimal four-field extensions of the Standard Model shows that a thermal dark matter candidate can simultaneously address the muon g-2 discrepancy and the b to s lepton-lepton B-meson anomalies.
Complete Vector-like Fourth Family and new $\mathrm{U(1)^\prime}$ for Muon Anomalies
hep-ph 2019-06 conditional novelty 5.0 of 10

A single model with a new U(1)-prime gauge boson and a complete vector-like fourth family fits both the muon g-2 and b to s ll anomalies while remaining consistent with other precision observables.
Generic Loop Effects of New Scalars and Fermions in $b\to s\ell^+\ell^-$, $(g-2)_\mu$ and a Vector-like $4^{\rm th}$ Generation
hep-ph 2019-04 conditional novelty 5.0 of 10

A vector-like fourth generation plus a real scalar can fit both the b to s lepton-lepton and muon g-2 anomalies at once, with the global fit favoring right-handed couplings.
Flavourful $Z'$ portal for vector-like neutrino Dark Matter and $R_{K^{(*)}}$
hep-ph 2018-03 conditional novelty 5.0 of 10

A flavoured Z' coupled to a fourth-family Dirac neutrino can, within a narrow parameter window, account for both the R_K and R_K* B-decay anomalies and the dark matter relic abundance.

Show 1 more citing papers

New Physics in $b \to s \ell^+ \ell^-$ confronts new data on Lepton Universality
hep-ph 2019-03 conditional novelty 4.0 of 10

Updated R_K and R_K* measurements still prefer new physics in b to s muon transitions, but which operator pair wins depends on how charm-loop hadronic effects are treated.

How the literature uses it

28 arXiv papers cite this in 39 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 21 sentences without a confident label

Builds on it 2 papers

In this work, we consider a modification of the model of Ref. [ref] .

B anomalies and dark matter: a complex connection · Introduction · 0.99
This is a modified version of model considered in [ref] , where the fermionic dark matter field was accompanied by a scalar and a coloured fermion.

Imprints of flavor anomalies on neutrino oscillations through dark matter halo · A model with scalar fields and a Majorana dark matter fermion for $b →s μ^+ μ^-$ · 0.99

Compares with it 1 paper

Our model differs from that of Ref. [ref] in that we have two extra scalar fields which couple to the lepton or quark sectors.

B anomalies and dark matter: a complex connection · The model · 0.99

Cites it as support 2 papers

On the other hand, while those scenarios require strong assumptions on the flavor symmetry and its symmetry-breaking terms, ROFV can be accidentally realised from the underlying dynamics, see e.g. Refs. [ref] .

Rank-One Flavor Violation and B-meson anomalies · Introduction · 0.97
On the other hand, while those scenarios require strong assumptions on the flavour symmetry and its symmetry-breaking terms, ROFV can be accidentally realised from the underlying dynamics, see e.g. Refs. [ref] .

New Physics Hints from Flavour · The ROFV framework · 0.98

Cites it as background 12 papers

Since the LHCb Collaboration reported some deviations from the Standard Model (SM) prediction in the $B→K^(*)ℓℓ$ ($ℓ=e, μ$) decays a few years ago [ref] , a lot of interest has been drawn to reveal the origin of the anomalies [ref] .

Dark matter for $b\to s \mu^+ \mu^-$ anomaly in a gauged $U(1)_X$ model · Introduction · 0.81
References [ref] discuss a scalar singlet DM realization (bIA model), while [ref] discusses DM in the context of a leptophilic fermionic singlet setup (bIIA) for Majorana DM.

Fermionic Singlet Dark Matter in One-Loop Solutions to the $R_K$ Anomaly: A Systematic Study · Introduction · 0.84
To this end, there have been attempts to link mostly the $R_K^(*)$ discrepancy with DM [ref] .

B-physics anomalies: The bridge between R-parity violating Supersymmetry and flavoured Dark Matter · Introduction · 0.83

What it cites · 29 sentences without a confident label

Uses the method or tool of 7 papers

These analyses has been implemented in CheckMATE 2.0.14 [ref] , which we used to constrain our model, in conjunction with FeynRules 2.3 [ref] and MadGraph 2.6.0 [ref] . 20,000 events per model point were generated for the process $p p →ΨΨ̅$ ($p p →Ψϕ^*$ is suppressed by the small couplings of $Ψ$ and $ϕ$ to first generation quarks, or the parton distribution function of $b$ or $t$).

FeynRules 2.0 - A complete toolbox for tree-level phenomenology · Introduction · 1.00
These analyses has been implemented in CheckMATE 2.0.14 [ref] , which we used to constrain our model, in conjunction with FeynRules 2.3 [ref] and MadGraph 2.6.0 [ref] . 20,000 events per model point were generated for the process $p p →ΨΨ̅$ ($p p →Ψϕ^*$ is suppressed by the small couplings of $Ψ$ and $ϕ$ to first generation quarks, or the parton distribution function of $b$ or $t$).

CheckMATE: Confronting your Favourite New Physics Model with LHC Data · Introduction · 1.00
These analyses has been implemented in CheckMATE 2.0.14 [ref] , which we used to constrain our model, in conjunction with FeynRules 2.3 [ref] and MadGraph 2.6.0 [ref] . 20,000 events per model point were generated for the process $p p →ΨΨ̅$ ($p p →Ψϕ^*$ is suppressed by the small couplings of $Ψ$ and $ϕ$ to first generation quarks, or the parton distribution function of $b$ or $t$).

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations · Introduction · 1.00

Uses data or values from 4 papers

On the other hand, strong $B_s$ mixing constraints, as determined by the mass splitting between $B_s$ and $B̅_s$, limit the coefficient of $(s̅ b)^2$ in table [ref] to be less than $1/(408 TeV)^2$ at 95% confidence level (c.l.) [ref] , giving the bound $|λ̃_2λ̃_3| ≲M/(6.6 TeV)$.

Loop effects of heavy new scalars and fermions in $b\to s\mu^+\mu^-$ · Introduction · 0.85
To get the observed relic density [ref] , at the freeze-out temperature $T_f$ this should be roughly equal to the standard value $⟨σv_rel⟩_0 ≅4.6×10^-26cm^3$/s [ref] appropriate for $p$-wave annihilating Majorana dark matter in the mass range $m_S≳50$GeV, that we will see is required by collider constraints.

Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation · Introduction · 0.85
To get the observed relic density [ref] , at the freeze-out temperature $T_f$ this should be roughly equal to the standard value $⟨σv_rel⟩_0 ≅4.6×10^-26cm^3$/s [ref] appropriate for $p$-wave annihilating Majorana dark matter in the mass range $m_S≳50$GeV, that we will see is required by collider constraints.

Planck 2015 results. XIII. Cosmological parameters · Introduction · 0.85

Compares with 1 paper

For our benchmark model with $M = 1$ TeV this leads to $σ∼10^-50$cm$^2$ for scattering off neutrons, far below current experimental limits on spin-dependent scattering from the PICO-60 direct detection experiment [ref] .

Dark Matter Search Results from the PICO-60 C$_3$F$_8$ Bubble Chamber · Introduction · 0.87

Cites as background 26 papers

The new physics contribution ([ref]) can be obtained from tree-level exchange of a heavy $Z'$ vector boson [ref] or leptoquark [ref] , or through loop effects of new particles.

Excesses of muon $g-2$, $R_{D^{(\ast)}}$, and $R_K$ in a leptoquark model · Introduction · 0.95
The new physics contribution ([ref]) can be obtained from tree-level exchange of a heavy $Z'$ vector boson [ref] or leptoquark [ref] , or through loop effects of new particles.

Simultaneous Explanation of $R(D^{(*)})$ and $b\to s\mu^+\mu^-$: The Last Scalar Leptoquarks Standing · Introduction · 0.95
The new physics contribution ([ref]) can be obtained from tree-level exchange of a heavy $Z'$ vector boson [ref] or leptoquark [ref] , or through loop effects of new particles.

Reconsidering the One Leptoquark solution: flavor anomalies and neutrino mass · Introduction · 0.95

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