Explaining the $R_{K^{(*)}}$ anomalies and the CDF $M_W$ in Flavorful Top Seesaw Models with Gauged $U(1)_{L(-R)}$

Yi Chung

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Explaining the $R_{K^{(*)}}$ anomalies and the CDF $M_W$ in Flavorful Top Seesaw Models with Gauged $U(1)_{L(-R)}$

Yi Chung

High Energy Physics - Phenomenology · Submitted 24 Oct 2022

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

The authors' main claim Based on the assumptions, a TeV-scale $Z'$ boson is still viable and can be probed in the near future.

how it is stated · hedged possibility 0.59 read the record →

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arXiv ID2210.13402 (version 3)

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CitationYi Chung. "Explaining the $R_{K^{(*)}}$ anomalies and the CDF $M_W$ in Flavorful Top Seesaw Models with Gauged $U(1)_{L(-R)}$." arXiv:2210.13402 (2022). https://pith.science/paper/GPP3R2RM

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What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.29 · human participants 0.01 · controlled comparison 0.03 · randomized assignment 0.01 · states quantitative result 0.11 · compares with prior results 0.16 · mentions code or data availability 0.02.

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arXiv listing abstract v3. Results and the main claim are underlined; show every role.

A new heavy $Z'$ vector boson provides a possible explanation for the neutral current B anomalies and points to the scale where we expect the solution to the hierarchy problem to appear. In this paper, we explore a modified Top Seesaw model based on the global symmetry breaking of $U(3)_L$ to $U(2)_L$. The symmetry is partially gauged such that the breaking introduces not only a composite Higgs doublet but also a TeV-scale $Z'$ boson. The $U(3)_L/U(2)_L$ Top Seesaw model predicts a light Higgs boson as well as a large top Yukawa coupling. Additional $U(1)'$ symmetry is gauged such that a flavorful TeV-scale $Z'$ boson is introduced to address the B anomalies. The existence of a heavy vector-like top quark and $Z-Z'$ mixing breaks the custodial symmetry, which predicts a heavier $W$ mass as observed by the CDF collaboration. Two possible candidates for the $U(1)'$ symmetry corresponding to the $Z'$ boson, $U(1)_L$ and $U(1)_{L-R}$, are discussed in detail. The parameter space for the models to address both anomalies is presented. The direct searches of the $Z'$ boson from dilepton channels are also studied. Based on the assumptions, a TeV-scale $Z'$ boson is still viable and can be probed in the near future.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	A new heavy $Z'$ vector boson provides a possible explanation for the neutral current B anomalies and points to the scale where we expect the solution to the hierarchy problem to appear.	background 0.94	0.11	0.27	hedged possibility 1.00
s1	In this paper, we explore a modified Top Seesaw model based on the global symmetry breaking of $U(3)_L$ to $U(2)_L$.	contribution 0.76	0.75	0.04	asserted 0.97
s2	The symmetry is partially gauged such that the breaking introduces not only a composite Higgs doublet but also a TeV-scale $Z'$ boson.	method 0.61	0.43	0.07	asserted 1.00
s3	The $U(3)_L/U(2)_L$ Top Seesaw model predicts a light Higgs boson as well as a large top Yukawa coupling.	result 0.62	0.50	0.05	asserted 1.00
s4	Additional $U(1)'$ symmetry is gauged such that a flavorful TeV-scale $Z'$ boson is introduced to address the B anomalies.	method 0.56	0.49	0.09	asserted 1.00
s5	The existence of a heavy vector-like top quark and $Z-Z'$ mixing breaks the custodial symmetry, which predicts a heavier $W$ mass as observed by the CDF collaboration.	result 0.48	0.48	0.16	asserted 0.99
s6	Two possible candidates for the $U(1)'$ symmetry corresponding to the $Z'$ boson, $U(1)_L$ and $U(1)_{L-R}$, are discussed in detail.	contribution 0.75	0.72	0.05	asserted 0.83
s7	The parameter space for the models to address both anomalies is presented.	contribution 0.75	0.86	0.09	asserted 0.90
s8	The direct searches of the $Z'$ boson from dilepton channels are also studied.	contribution 0.86	0.83	0.04	asserted 0.97
s9	Based on the assumptions, a TeV-scale $Z'$ boson is still viable and can be probed in the near future.	interpretation 0.44	0.72	0.60	hedged possibility 0.59

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from argument 0.52.

What was examined, and what was not

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arXiv listing abstract v3

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full text
figures and tables
references and citing sentences
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P abstract

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S sections
T body sentences
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

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Original abstract

A new heavy $Z'$ vector boson provides a possible explanation for the neutral current B anomalies and points to the scale where we expect the solution to the hierarchy problem to appear. In this paper, we explore a modified Top Seesaw model based on the global symmetry breaking of $U(3)_L$ to $U(2)_L$. The symmetry is partially gauged such that the breaking introduces not only a composite Higgs doublet but also a TeV-scale $Z'$ boson. The $U(3)_L/U(2)_L$ Top Seesaw model predicts a light Higgs boson as well as a large top Yukawa coupling. Additional $U(1)'$ symmetry is gauged such that a flavorful TeV-scale $Z'$ boson is introduced to address the B anomalies. The existence of a heavy vector-like top quark and $Z-Z'$ mixing breaks the custodial symmetry, which predicts a heavier $W$ mass as observed by the CDF collaboration. Two possible candidates for the $U(1)'$ symmetry corresponding to the $Z'$ boson, $U(1)_L$ and $U(1)_{L-R}$, are discussed in detail. The parameter space for the models to address both anomalies is presented. The direct searches of the $Z'$ boson from dilepton channels are also studied. Based on the assumptions, a TeV-scale $Z'$ boson is still viable and can be probed in the near future.

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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

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Cites it as background 2 papers

The possible new physics explanations of this discrepancy have been extensively studied afterwards [ref] .

Accommodating the CDF W-boson Mass Measurement in the Beautiful Mirror Model · Introduction · 0.99
In the literature, there have already been many BSM attempts [ref] to explain the $M_W$ discrepancy.

$W$-Boson Mass Anomaly from a General $SU(2)_{L}$ Scalar Multiplet · Introduction · 0.92

What it cites · 63 sentences without a confident label

Uses the method or tool of 3 papers

To analyze the full parameter space in the $f'$ v.s. $ϵ_μμ$ plane, we follow the method used in [ref] , which allows us to transform it to the constraints on $f'$ v.s. $M_Z'$ plane - the two most important parameters for our $Z'$ boson.

A Flavorful Composite Higgs Model : Connecting the B anomalies with the hierarchy problem · The $Z'$ boson of $U(1)_L$ gauge symmetry · 1.00
To analyze the full parameter space in the $f'$ v.s. $ϵ_μμ$ plane, we follow the method used in [ref] , which allows us to transform it to the constraints on $f'$ v.s. $M_Z'$ plane - the two most important parameters for our $Z'$ boson.

Explaining the $R_{K^{(*)}}$ anomalies in a Fundamental Composite Higgs Model with Gauged $U(1)_{SM_3-HB}$ · The $Z'$ boson of $U(1)_L$ gauge symmetry · 1.00
For a realistic potential to realize the desired mechanism, we follow the construction in [ref] .

Higgs mass from compositeness at a multi-TeV scale · Scalar potential and vacuum structure · 0.93

Uses data or values from 4 papers

The current bound by the $μμ$ search of ATLAS [ref] with an integrated luminosity of 139 fb$^-1$ is given by $M_Z'≳1250$ GeV, which is shown as the blue line in the figure (left).

Search for high-mass dilepton resonances using 139 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector · The $Z'$ boson of $U(1)_L$ gauge symmetry · 0.99
Comparing the cross section for each channel derived from the parameter space with the experimental results, $μτ$ search taken from the CMS [ref] with an integrated luminosity of 137 fb$^-1$ and $ττ$ search taken from the ATLAS [ref] with an integrated luminosity of 139 fb$^-1$, we get the purple shaded region with a dashed line and a dotted line excluded by $μτ$ search and $ττ$ search respectively.

Search for heavy Higgs bosons decaying into two tau leptons with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV · The $Z'$ boson of $U(1)_L$ gauge symmetry · 0.95
If we only consider the clean observables, the global fit value for the Wilson coefficient $C_LL$ is given by [ref] [equation] which requires

New Physics in Rare B Decays after Moriond 2021 · Neutral Current B Anomalies · 0.97

Compares with 2 papers

This ratio is an important prediction of our $Z'$ model.[The ratio happens to be the same as the ratio in the $Z'$ model of [ref] , where the $Z'$ boson has a vector-like universal coupling with all the thrid-generation SM fermions in the flavor basis.

Explaining the $R_{K^{(*)}}$ anomalies in a Fundamental Composite Higgs Model with Gauged $U(1)_{SM_3-HB}$ · The $Z'$ boson of $U(1)_L$ gauge symmetry · 0.95
This ratio is an important prediction of our $Z'$ model.[The ratio happens to be the same as the ratio in the $Z'$ model of [ref] , where the $Z'$ boson has a vector-like universal coupling with all the thrid-generation SM fermions in the flavor basis.

A Flavorful Composite Higgs Model : Connecting the B anomalies with the hierarchy problem · The $Z'$ boson of $U(1)_L$ gauge symmetry · 0.95

Cites as background 22 papers

Many analyses on the oblique parameters based on the new $M_W$ measured by the CDF collaboration have been conducted [ref] .

Electroweak Precision Fit and New Physics in light of $W$ Boson Mass · The CDF $W$ mass and the constraint on the scale $f$ · 0.86
Many analyses on the oblique parameters based on the new $M_W$ measured by the CDF collaboration have been conducted [ref] .

Interpreting electroweak precision data including the $W$-mass CDF anomaly · The CDF $W$ mass and the constraint on the scale $f$ · 0.86
Many analyses on the oblique parameters based on the new $M_W$ measured by the CDF collaboration have been conducted [ref] .

Oblique Lessons from the $W$ Mass Measurement at CDF II · The CDF $W$ mass and the constraint on the scale $f$ · 0.86

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