Comment on Implications of new physics in the decays $B_c \to (J/\psi,\eta_c)\tau\nu$

Christine Davies; Craig McNeile

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Comment on Implications of new physics in the decays $B_c \to (J/\psi,\eta_c)\tau\nu$

Christine Davies, Craig McNeile

High Energy Physics - Lattice · Submitted 7 Jun 2018

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

The authors' main claim We note that this matrix element can be determined using existing lattice QCD results.

how it is stated · hedged possibility 0.57 read the record →

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arXiv ID1806.02586 (version 1)

Pith IDPAMOLE5K, Pith's permanent record of this paper and its review

CitationChristine Davies, Craig McNeile. "Comment on Implications of new physics in the decays $B_c \to (J/\psi,\eta_c)\tau\nu$." arXiv:1806.02586 (2018). https://pith.science/paper/PAMOLE5K

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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 2,384 input tokens.

What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.20 · human participants 0.01 · controlled comparison 0.05 · randomized assignment 0.01 · states quantitative result 0.04 · compares with prior results 0.59 · mentions code or data availability 0.03.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; show every role.

As part of a study BSM corrections to leptonic decays of the $B_c$ meson, Tran et al. (arXiv:1801.06927) use the covariant confining quark model (CCQM) to estimate the matrix element of the pseudo-scalar curent between the vacuum and the $B_c$ meson. We note that this matrix element can be determined using existing lattice QCD results.

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	As part of a study BSM corrections to leptonic decays of the $B_c$ meson, Tran et al. (arXiv:1801.06927) use the covariant confining quark model (CCQM) to estimate the matrix element of the pseudo-scalar curent between the vacuum and the $B_c$ meson.	background 0.96	0.05	0.06	asserted 1.00
s1	We note that this matrix element can be determined using existing lattice QCD results.	background 0.29	0.10	0.34	hedged possibility 0.57

What kind of paper the classifier reports this is: position or commentary 1.00 · evidence from literature 0.69.

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arXiv listing abstract v1

not examined

full text
figures and tables
references and citing sentences
relations to other papers

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P abstract

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S sections
T body sentences
C citations
R cross-paper relations

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

The paper

Original abstract

As part of a study BSM corrections to leptonic decays of the $B_c$ meson, Tran et al. (arXiv:1801.06927) use the covariant confining quark model (CCQM) to estimate the matrix element of the pseudo-scalar curent between the vacuum and the $B_c$ meson. We note that this matrix element can be determined using existing lattice QCD results.

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What this paper does with the arXiv papers it cites

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

What it cites · 15 sentences without a confident label

Uses the method or tool of 2 papers

The result for $f_Bc^P$ can be run to different values of $μ$ using the inverse of the running of the $MS$ quark mass [ref] .

Quark Mass Anomalous Dimension to alpha_s**4 · Lattice QCD results · 0.93
The result for $f_Bc^P$ can be run to different values of $μ$ using the inverse of the running of the $MS$ quark mass [ref] .

The 4-loop quark mass anomalous dimension and the invariant quark mass · Lattice QCD results · 0.93

Uses data or values from 4 papers

The value obtained is [equation] and a complete error budget is given in [ref] .

Heavy meson masses and decay constants from relativistic heavy quarks in full lattice QCD · Lattice QCD results · 0.93
We use results from [ref] for the quark masses in the $MS$ scheme at a standard scale of 3 GeV, $m_c$(3 GeV, $n_f$=4) = 0.986(6) GeV, $m_b/m_c$ = 4.51(4), $f_B_c$ from [ref] (0.427(6) GeV) and $M_B_c$ = 6.274(1) GeV from experiment [ref] .

High-Precision c and b Masses, and QCD Coupling from Current-Current Correlators in Lattice and Continuum QCD · Lattice QCD results · 1.00
We use results from [ref] for the quark masses in the $MS$ scheme at a standard scale of 3 GeV, $m_c$(3 GeV, $n_f$=4) = 0.986(6) GeV, $m_b/m_c$ = 4.51(4), $f_B_c$ from [ref] (0.427(6) GeV) and $M_B_c$ = 6.274(1) GeV from experiment [ref] .

Observation of $B_{c}^{+} \to J/\psi D^{(*)} K^{(*)}$ decays · Lattice QCD results · 1.00

Compares with 1 paper

The result for $f_B_c$ computed using the CCQM [ref] of 0.489 GeV is 15% larger than that obtained from the lattice QCD results discussed above.

Implications of new physics in the decays $B_c \to (J/\psi,\eta_c)\tau\nu$ · Lattice QCD results · 0.87

Cites as background 2 papers

[ref] considers a Hamiltonian of corrections to the standard model: [equation] and works out the phenomenology for the leptonic and semi-leptonic decays of the $B_c$ meson.

Implications of new physics in the decays $B_c \to (J/\psi,\eta_c)\tau\nu$ · The pseudo-scalar matrix element · 0.93
Lattice QCD results for the form factors of $B_c$ semileptonic decay to charmonium states are as yet preliminary [ref] but will provide a further point of comparison in future.

$B_c$ decays from highly improved staggered quarks and NRQCD · Lattice QCD results · 0.86

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