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Search for direct $CP$ violation in charged charmless $B \to PV$ decays
High Energy Physics - Experiment · Submitted 4 Jun 2022
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim This is the first observation of $CP$ violation in this process.
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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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The abstract, sentence by sentence
Measurements of $CP$ asymmetry in charmless $B\to PV$ decays are presented, where $P$ and $V$ denote a pseudoscalar and a vector meson, respectively. Five different $B\to PV$ decays from four final states, $B^\pm \to \pi^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm K^+ K^-$ and $B^\pm \to \pi^\pm K^+ K^-$ are analyzed. The measurements are based on a method that does not require full amplitude analyses, and are performed using proton-proton collision data at a center-of-mass energy of 13 TeV collected by LHCb between 2015 and 2018, corresponding to an integrated luminosity of 5.9 fb$^{-1}$. In the $\pi^+ \pi^-$ $\textit{P}$-wave, in the region dominated by the $B^\pm \to \rho(770)^0 K^\pm$ decay, a $CP$ asymmetry of $\mbox{$A_{CP}$ = +0.150 $\pm$ 0.019 $\pm$ 0.011}$ is measured, where the first uncertainty is statistical and the second is systematic. This is the first observation of $CP$ violation in this process. For the other four decay channels, in regions dominated by the $B^\pm \to \rho(770)^0 \pi^\pm$, $B^\pm \to \overset{(-)}{K^*}(892)^0 \pi^\pm$, $B^\pm \to \overset{(-)}{K^*}(892)^0 K^\pm$ and $B^\pm \to \phi(1020) K^\pm$ decays, $CP$ asymmetries in the $\textit{P}$-wave compatible with zero are measured.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Measurements of $CP$ asymmetry in charmless $B\to PV$ decays are presented, where $P$ and $V$ denote a pseudoscalar and a vector meson, respectively. | contribution 0.85 | 0.72 | 0.03 | asserted 0.96 |
| s1 | Five different $B\to PV$ decays from four final states, $B^\pm \to \pi^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm K^+ K^-$ and $B^\pm \to \pi^\pm K^+ K^-$ are analyzed. | contribution 0.98 | 0.87 | 0.02 | asserted 0.99 |
| s2 | The measurements are based on a method that does not require full amplitude analyses, and are performed using proton-proton collision data at a center-of-mass energy of 13 TeV collected by LHCb between 2015 and 2018, corresponding to an integrated luminosity of 5.9 fb$^{-1}$. | method 1.00 | 0.81 | 0.02 | asserted 1.00 |
| s3 | In the $\pi^+ \pi^-$ $\textit{P}$-wave, in the region dominated by the $B^\pm \to \rho(770)^0 K^\pm$ decay, a $CP$ asymmetry of $\mbox{$A_{CP}$ = +0.150 $\pm$ 0.019 $\pm$ 0.011}$ is measured, where the first uncertainty is statistical and the second is systematic. | result 1.00 | 0.97 | 0.30 | asserted 1.00 |
| s4 | This is the first observation of $CP$ violation in this process. | result 0.58 | 0.92 | 0.50 | asserted 1.00 |
| s5 | For the other four decay channels, in regions dominated by the $B^\pm \to \rho(770)^0 \pi^\pm$, $B^\pm \to \overset{(-)}{K^*}(892)^0 \pi^\pm$, $B^\pm \to \overset{(-)}{K^*}(892)^0 K^\pm$ and $B^\pm \to \phi(1020) K^\pm$ decays, $CP$ asymmetries in the $\textit{P}$-wave compatible with zero are measured. | result 1.00 | 0.97 | 0.10 | asserted 0.71 |
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The paper
Original abstract
Measurements of $CP$ asymmetry in charmless $B\to PV$ decays are presented, where $P$ and $V$ denote a pseudoscalar and a vector meson, respectively. Five different $B\to PV$ decays from four final states, $B^\pm \to \pi^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm \pi^+ \pi^-$, $B^\pm \to K^\pm K^+ K^-$ and $B^\pm \to \pi^\pm K^+ K^-$ are analyzed. The measurements are based on a method that does not require full amplitude analyses, and are performed using proton-proton collision data at a center-of-mass energy of 13 TeV collected by LHCb between 2015 and 2018, corresponding to an integrated luminosity of 5.9 fb$^{-1}$. In the $\pi^+ \pi^-$ $\textit{P}$-wave, in the region dominated by the $B^\pm \to \rho(770)^0 K^\pm$ decay, a $CP$ asymmetry of $\mbox{$A_{CP}$ = +0.150 $\pm$ 0.019 $\pm$ 0.011}$ is measured, where the first uncertainty is statistical and the second is systematic. This is the first observation of $CP$ violation in this process. For the other four decay channels, in regions dominated by the $B^\pm \to \rho(770)^0 \pi^\pm$, $B^\pm \to \overset{(-)}{K^*}(892)^0 \pi^\pm$, $B^\pm \to \overset{(-)}{K^*}(892)^0 K^\pm$ and $B^\pm \to \phi(1020) K^\pm$ decays, $CP$ asymmetries in the $\textit{P}$-wave compatible with zero are measured.
Human review
References
How the literature uses it
3 arXiv papers cite this in 6 sentences
Papers citing it · 4 sentences without a confident label
Uses its data or values 2 papers
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However, this is in contradiction to the experimental observation of $_CP(B^+→ρ^0 K^+)=0.150±0.019$ by LHCb recently [ref] .
CP violation in the interference between $\rho(770)^0$ and $S$-wave in $B^\pm\to \pi^+ \pi^-\pi^\pm$ decays and its implication for CP asymmetry in $B^\pm\to \rho^0\pi^\pm$ · $B^±→ρ^0π^±$ decays · 0.85
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The LHCb Collaboration reported the first observation of the direct $CP$ asymmetry $A_CP(B^+→K^+ρ^0)=(15.0±1.9±1.1)%$ [ref] recently based on the measurements of the three-body decay $B^±→K^±π^+π^-$.
Improved global determination of two-meson distribution amplitudes from multi-body $B$ decays · Direct $CP$ Asymmetries of Multi-body $B$ Decays · 0.94
What it cites · 17 sentences without a confident label
Uses the method or tool of 6 papers
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In the case of one vector resonance interfering with a scalar component, the decay amplitudes can be represented by [ref]
Suppressed $B \to PV $ CP asymmetry: CPT constraint · $B →PV$ fit function · 0.95
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All asymmetries are computed from the term $p_2^±$ and corrected for the -meson production asymmetry [ref] .
Direct $CP$ violation in charmless three-body decays of $B^{\pm}$ mesons · Results · 0.88
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The selection of signal candidates follows closely the procedure used in the model-independent analysis of the same data sample [ref] .
Measurements of $C\!P$ violation in the three-body phase space of charmless $B^{\pm}$ decays · Selection of signal candidates · 0.99
Uses data or values from 3 papers
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From the amplitude analysis of the $B^0 →K^0_S π^+ π^-$ decay, the asymmetry in the decay was measured to be = $-0.308 ±0.062$ [ref] .
Amplitude analysis of the decay $\overline{B}^0 \to K_{S}^0 \pi^+ \pi^-$ and first observation of the CP asymmetry in $\overline{B}^0 \to K^{*}(892)^- \pi^+$ · Introduction · 0.99
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Finally, from the analysis of the $B^- →π^-π^+π^-$ decay, the asymmetry of $B^- →π^-$ decay was found to be consistent with zero, [ref] .
1909.05211 · Introduction · 0.90
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The measurement of the decay $B^±→K^±$ from $B^±→K^± π^∓K^±$ decay was $0.123 ±0.087 ±0.045$ [ref] .
1905.09244 · Introduction · 0.97
Compares with 3 papers
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Some tension is found between the results of this analysis and those from Belle and BaBar, whereas good agreement is found with LHCb results obtained with amplitude analyses of $$ [ref] and decays [ref] .
1905.09244 · Summary and conclusion · 1.00
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Some tension is found between the results of this analysis and those from Belle and BaBar, whereas good agreement is found with LHCb results obtained with amplitude analyses of $$ [ref] and decays [ref] .
1909.05211 · Summary and conclusion · 1.00
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This measurement is in agreement with the value obtained by the experiment [ref] , $= +0.128 ±0.044 ±0.013$, at the 2.8 $σ$ level.
Study of CP violation in Dalitz-plot analyses of B0 --> K+K-KS, B+ --> K+K-K+, and B+ --> KSKSK+ · decay · 0.97
Cites as background 17 papers
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Recently, the LHCb collaboration presented three asymmetry measurements of $B →PV$ decays based on a full Dalitz plot analysis of data collected in 2011 and 2012 [ref] .
1905.09244 · Introduction · 0.85
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Recently, the LHCb collaboration presented three asymmetry measurements of $B →PV$ decays based on a full Dalitz plot analysis of data collected in 2011 and 2012 [ref] .
1909.05211 · Introduction · 0.85
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Recently, the LHCb collaboration presented three asymmetry measurements of $B →PV$ decays based on a full Dalitz plot analysis of data collected in 2011 and 2012 [ref] .
Amplitude analysis of the decay $\overline{B}^0 \to K_{S}^0 \pi^+ \pi^-$ and first observation of the CP asymmetry in $\overline{B}^0 \to K^{*}(892)^- \pi^+$ · Introduction · 0.85
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