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The 2004 UTfit Collaboration Report on the Status of the Unitarity Triangle in the Standard Model

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UTfit Collaboration: M. Bona, M. Ciuchini, E. Franco, V. Lubicz, G. Martinelli, F. Parodi, M. Pierini, P. Roudeau
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C. Schiavi, L. Silvestrini, A. Stocchi

High Energy Physics - Phenomenology · Submitted 21 Jan 2005

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

The authors' main claim Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model.

how it is stated · asserted 0.95 read the record →

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arXiv IDhep-ph/0501199 (version 2)
Pith IDKHFNNS25, Pith's permanent record of this paper and its review
CitationA. Stocchi, C. Schiavi, E. Franco, F. Parodi, G. Martinelli, L. Silvestrini, M. Ciuchini, M. Pierini, P. Roudeau, UTfit Collaboration: M. Bona, V. Lubicz. "The 2004 UTfit Collaboration Report on the Status of the Unitarity Triangle in the Standard Model." arXiv:hep-ph/0501199 (2005). https://pith.science/paper/KHFNNS25
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The compiled record

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-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,415 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.02 · states limitation 0.10 · human participants 0.02 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.16 · mentions code or data availability 0.71.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the measurements of |V_ub/V_cb|, Delta M_d, the lower limit on Delta M_s, epsilon_k, and the measurement of the phase of the B_d - anti B_d mixing amplitude through the time-dependent CP asymmetry in B^0 to J/psi K^0 decays. In addition, we consider the direct determination of alpha, gamma, 2 beta + gamma and cos(2 beta) from the measurements of new CP-violating quantities, recently performed at the B factories. We also discuss the opportunities offered by improving the precision of the various physical quantities entering in the determination of the Unitarity Triangle parameters. The results and the plots presented in this paper can also be found at http://www.utfit.org, where they are continuously updated with the newest experimental and theoretical results.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. contribution 0.99 0.89 0.09 asserted 0.95
s1 The basic experimental constraints come from the measurements of |V_ub/V_cb|, Delta M_d, the lower limit on Delta M_s, epsilon_k, and the measurement of the phase of the B_d - anti B_d mixing amplitude through the time-dependent CP asymmetry in B^0 to J/psi K^0 decays. method 0.97 0.11 0.04 asserted 1.00
s2 In addition, we consider the direct determination of alpha, gamma, 2 beta + gamma and cos(2 beta) from the measurements of new CP-violating quantities, recently performed at the B factories. method 0.56 0.38 0.05 asserted 0.99
s3 We also discuss the opportunities offered by improving the precision of the various physical quantities entering in the determination of the Unitarity Triangle parameters. future work 0.92 0.27 0.05 asserted 0.46
s4 The results and the plots presented in this paper can also be found at http://www.utfit.org, where they are continuously updated with the newest experimental and theoretical results. contribution 0.60 0.49 0.03 asserted 0.98

What kind of paper the classifier reports this is: review 0.58 · evidence from analysis of existing data 0.99.

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  • 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

Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the measurements of |V_ub/V_cb|, Delta M_d, the lower limit on Delta M_s, epsilon_k, and the measurement of the phase of the B_d - anti B_d mixing amplitude through the time-dependent CP asymmetry in B^0 to J/psi K^0 decays. In addition, we consider the direct determination of alpha, gamma, 2 beta + gamma and cos(2 beta) from the measurements of new CP-violating quantities, recently performed at the B factories. We also discuss the opportunities offered by improving the precision of the various physical quantities entering in the determination of the Unitarity Triangle parameters. The results and the plots presented in this paper can also be found at http://www.utfit.org, where they are continuously updated with the newest experimental and theoretical results.

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References
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46 later papers cite it

Evidence: substantial. 37 of the citing papers share no author with it, and 17 of those carry a confident label from Pith's citation classifier.

Pith read 17 of the 62 citing sentences, choosing only those whose citation markers point at this paper alone, and wrote the paraphrases from them. The summary, the counts, the evidence level, the links and the quotes come from code; the summary counts the papers listed below. A later paper is listed under a label when Pith's citation classifier gives one of its sentences that label at probability 0.8 or more (0.95 for support), Pith's reading finds that the citing paper itself did it, and a second check confirms the paraphrase against the sentence. This section lists uses only. It does not list criticism or disagreement, so their absence here says nothing about how the paper has been received. Papers that share an author with this one are listed apart, under "By the same authors". A quote is the citing authors' own sentence, shown when their paper's licence is CC BY, CC BY-SA or CC0. JSON

Uses its data or values 5 of 17 papers with this label
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How the literature uses it

39 arXiv papers cite this in 54 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 whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

Papers citing it · 26 sentences without a confident label

Uses its method or tool 1 paper
Uses its data or values 15 papers
  • For the quark mixing parameters, we use the values from the UTFit collaboration [ref] : $sinθ_12 = 0.2254 ±0.0007$, $sinθ_23 = 0.04207 ±0.00064$, $sinθ_13 = 0.00364 ±0.00013$, and $δ= 1.208 ±0.054$.

    Running quark and lepton parameters at various scales · Numerical analysis · 1.00

  • For the numerical evaluation of Eq. [ref] we use the global fit from Ref. [ref] , [K^+→μ^+ν_μ]=63.58(11)%, τ(K^+)=12.384(15) ns, τ(K_L)=51.16(21) ns, as well as $α(M_Z)≡α_MS(M_Z)=1/127.9$ and $sin^2θ_W≡sin^2θ̂_W^MS=0.23122(4)$ [ref] .[For the LD part we always use $α≡α(0)=1/137.036$.] For the CKM matrix elements we use [ref] [equation] where we have taken the mean of the numbers using CKMFitter [ref] and UTfit [ref] methodology and assigned the respective larger error.

    Improved Standard-Model prediction for ${K_L\to \ell^+\ell^-}$ · Short-distance contribution in the Standard Model · 1.00

  • The angle $γ$ corresponds to the result of global CKM fits [ref] .

    B -> V_L V_L Decays at Next-to-Leading Order in QCD · Experimental results and input parameters · 1.00

Compares with it 3 papers
  • This result is consistent with other methods [ref] .

    Theoretical Review on CP Violation in Rare B decays · Extraction of $γ$ from charmless modes · 0.99

  • The UT vertex $(ρ̅,η̅)$ extracted using these modes is consistent with our previous analysis using the $PP$ modes [ref] , and also agrees with other methods within errors [ref] .

    Flavor symmetry analysis of charmless B --> VP decays · Summary · 0.98

  • Numbers for $|V_ub|$ very similar to ([ref]) have been obtained from global fits of the unitarity triangle performed by the CKMfitter [ref] and UTfit [ref] collaborations, which quote [equation] While such global fit results summarize our current overall knowledge of quark-mixing parameters, they do not exhibit explicitly the individual pieces of information that determine this knowledge.

    B -> V_L V_L Decays at Next-to-Leading Order in QCD · Precision determination of $|V_ub|$ from $sin2β$ and $S_ρ$ · 0.91

Cites it as background 7 papers
  • In particular, the condition of $V_udV^∗_ub + V_cdV^∗_cb + V_tdV^∗_tb =0$ has been comprehensively studied by the CKMfitter [ref] and UTfit collaborations [ref] , and no indication of NP has been observed, up to now.[ Furthermore, the kaon unitarity triangle has also been studied in Refs. [ref] .] On the other hand, the second category is the normalization conditions: ∑_k=1^3 |V_ik |^2 = ∑_k=1^3 |V_ki |^2 = 1 .

    Complete one-loop QED corrections to $D_s^+$ leptonic decays and impact on the CKM unitarity test · Introduction · 0.84

  • Nowadays the SM analysis includes many experimental and theoretical results, such as predictions for several flavour observables and measurements of hadronic parameters which can be compared with the lattice QCD predictions [ref] .

    New Physics from Flavour · Introduction · 0.92

  • The standard global fit of the CKM unitarity triangle uses $B$-meson decay constants and mixing as an input [ref] .[For the latest results see: , and .] Experiments such as BaBar, Belle, and LHCb measure $B_q-B_q$ mixing in terms of mass differences (oscillation frequencies) $ΔM_q$ to subpercent accuracy [ref] .

    Calculating B-meson decay constants using domain-wall light quarks and nonperturbatively tuned relativistic b-quarks · Introduction · 0.88

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