High Energy Physics - Phenomenology · arXiv:1208.1286 v2 · submitted 6 Aug 2012
Recent topics in CP violation
The paper says
“A very recent analysis is presented, which yields a stronger bound for the maximal influence of penguin contributions than previous analyses and shows the corresponding uncertainty to be reducible with coming data.”
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The paper
Abstract
Recent topics regarding CP violation in heavy meson systems are discussed. As an introduction, the status of the Unitarity Triangle fit and CP violation in B meson mixing are briefly reviewed. Two topics are covered in more detail: Penguin pollution in the "golden mode" B_d to J/psi K has gained importance due to the apparent smallness of new physics effects, together with the outstanding precision expected from present and future collider experiments. A very recent analysis is presented, which yields a stronger bound for the maximal influence of penguin contributions than previous analyses and shows the corresponding uncertainty to be reducible with coming data. Direct CP violation in hadronic charm decays received a lot of attention lately, due to a measurement by the LHCb collaboration yielding an unexpectedly large result. While this value is certainly not generically predicted in the Standard Model, it might be possible to accommodate it nevertheless. Therefore a method is discussed to use flavour symmetries to distinguish between this possibility and new physics.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 1.00
What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.28 · human participants 0.02 · controlled comparison 0.07 · randomized assignment 0.01 · states quantitative result 0.15 · compares with prior results 0.88 · mentions code or data availability 0.01
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| Recent topics regarding CP violation in heavy meson systems are discussed. | background 0.65 | 0.15 | 0.04 | asserted 0.76 |
| As an introduction, the status of the Unitarity Triangle fit and CP violation in B meson mixing are briefly reviewed. | background 1.00 | 0.08 | 0.02 | asserted 0.92 |
| Two topics are covered in more detail: Penguin pollution in the "golden mode" B_d to J/psi K has gained importance due to the apparent smallness of new physics effects, together with the outstanding precision expected from present and future collider experiments. | background 0.51 | 0.08 | 0.09 | asserted 0.99 |
| A very recent analysis is presented, which yields a stronger bound for the maximal influence of penguin contributions than previous analyses and shows the corresponding uncertainty to be reducible with coming data. | result 0.72 | 0.80 | 0.23 | asserted 1.00 |
| Direct CP violation in hadronic charm decays received a lot of attention lately, due to a measurement by the LHCb collaboration yielding an unexpectedly large result. | background 0.98 | 0.04 | 0.04 | asserted 1.00 |
| While this value is certainly not generically predicted in the Standard Model, it might be possible to accommodate it nevertheless. | interpretation 0.64 | 0.08 | 0.05 | hedged possibility 0.59 |
| Therefore a method is discussed to use flavour symmetries to distinguish between this possibility and new physics. | method 0.59 | 0.38 | 0.15 | asserted 0.87 |
What kind of paper the classifier reports this is: review 0.96 · evidence from literature 0.78
What was examined, and what was not
Sources read
- arXiv listing abstract v2
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
How the labels were made
Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 5,552 input tokens, $0.0002 reported.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
How the literature uses it
What this paper does with the arXiv papers it cites
What it cites · 32 sentences without a confident label
Builds on 2 papers
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Extending furthermore the symmetry group from $U$-spin (used in [ref] ) to full $SU(3)$ then allows to relate a sufficient number of $B→J/ψP$ modes ($B∈{B_u,B_d,B_s}$ and $P∈{π^+,π^0,K^+,K^0,K̅^0}$) to determine the parameters for the $SU(3)$ breaking as well as the penguin pollution from the fit, using mild assumptions which are mostly testable with data [ref] .
Theoretical uncertainty in sin 2beta: An update · Penguin Pollution in the Golden Modes · 0.89
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Extending furthermore the symmetry group from $U$-spin (used in [ref] ) to full $SU(3)$ then allows to relate a sufficient number of $B→J/ψP$ modes ($B∈{B_u,B_d,B_s}$ and $P∈{π^+,π^0,K^+,K^0,K̅^0}$) to determine the parameters for the $SU(3)$ breaking as well as the penguin pollution from the fit, using mild assumptions which are mostly testable with data [ref] .
Determining weak phases from B->J/Psi P decays · Penguin Pollution in the Golden Modes · 0.89
Uses data or values from 4 papers
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Applying this method to presently available data for these decays [ref]
Observation of B0_s -> J/psi K*(892)0 and B0_s -> J/psi K0_S Decays · Penguin Pollution in the Golden Modes · 1.00
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Applying this method to presently available data for these decays [ref]
Averages of b-hadron, c-hadron, and tau-lepton properties as of early 2012 · Penguin Pollution in the Golden Modes · 1.00
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Instead, that analysis shows some indication of NP in $B_d$ mixing, driven by two effects: firstly the LDCA, the measurement of which by the D0 collaboration remains large [ref] .
Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb^-1 of p pbar collisions · Introduction · 0.86
Cites as support 3 papers
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This has been confirmed in recent publications by explicit fits to the data, which included symmetry-breaking corrections to the $U$-spin limit [ref] .
Repercussions of Flavour Symmetry Breaking on CP Violation in D-Meson Decays · Direct CP Violation in Hadronic Charm Decays · 0.99
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This has been confirmed in recent publications by explicit fits to the data, which included symmetry-breaking corrections to the $U$-spin limit [ref] .
A consistent picture for large penguins in D -> pi+ pi-, K+ K- · Direct CP Violation in Hadronic Charm Decays · 0.99
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This has been confirmed in recent publications by explicit fits to the data, which included symmetry-breaking corrections to the $U$-spin limit [ref] .
SU(3)-Flavor Anatomy of Non-Leptonic Charm Decays · Direct CP Violation in Hadronic Charm Decays · 0.99
Cites as background 7 papers
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The question if this value is compatible with the SM has been answered differently in the literature (see e.g. [ref] ), and many NP models have been examined with respect to their capability to explain the observed value naturally, e.g. in [ref] .
Implications of the LHCb Evidence for Charm CP Violation · Direct CP Violation in Hadronic Charm Decays · 0.90
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The question if this value is compatible with the SM has been answered differently in the literature (see e.g. [ref] ), and many NP models have been examined with respect to their capability to explain the observed value naturally, e.g. in [ref] .
Size of direct CP violation in singly Cabibbo-suppressed D decays · Direct CP Violation in Hadronic Charm Decays · 0.90
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The question if this value is compatible with the SM has been answered differently in the literature (see e.g. [ref] ), and many NP models have been examined with respect to their capability to explain the observed value naturally, e.g. in [ref] .
(\Delta A_{CP})_{LHCb} and the fourth generation · Direct CP Violation in Hadronic Charm Decays · 0.90
Challenges and discussion
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