High Energy Physics - Experiment · arXiv:0708.0304 v3 · submitted 2 Aug 2007
Improved measurement of time-dependent CP violation in B0 -> J/Psi pi0 decays
The paper says
“From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters $\mathcal{S}_{J/\psi \pi^0} = -0.65\pm0.21 (\rm{stat})\pm0.05 (\rm{syst})$ and $\mathcal{A}_{J/\psi \pi^0} = +0.08\pm0.16 (\rm{stat})\pm0.05 (\rm{syst})$, which are consistent with Standard Model expectations.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
We report improved measurements of time-dependent CP violation parameters for B0(B̄0) → J/ψπ0 decay. This analysis is based on 535 million BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters $\mathcal{S}_{J/\psi \pi^0} = -0.65\pm0.21 (\rm{stat})\pm0.05 (\rm{syst})$ and $\mathcal{A}_{J/\psi \pi^0} = +0.08\pm0.16 (\rm{stat})\pm0.05 (\rm{syst})$, which are consistent with Standard Model expectations.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: asserted 0.93
What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.13 · human participants 0.02 · controlled comparison 0.06 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.19 · mentions code or data availability 0.01
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v3). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| We report improved measurements of time-dependent CP violation parameters for $B^0(\bar{B}^0) \to J/\psi \pi^0$ decay. | contribution 0.99 | 0.96 | 0.32 | asserted 1.00 |
| This analysis is based on 535 million $B\bar{B}$ pairs accumulated at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. | method 1.00 | 0.76 | 0.02 | asserted 0.99 |
| From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters $\mathcal{S}_{J/\psi \pi^0} = -0.65\pm0.21 (\rm{stat})\pm0.05 (\rm{syst})$ and $\mathcal{A}_{J/\psi \pi^0} = +0.08\pm0.16 (\rm{stat})\pm0.05 (\rm{syst})$, which are consistent with Standard Model expectations. | result 1.00 | 0.97 | 0.86 | asserted 0.93 |
What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.71
What was examined, and what was not
Sources read
- arXiv listing abstract v3
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, 3,245 input tokens, $0.0001 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
Cited by 7 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- Penguin contributions to CP phases in $B_{d,s}$ decays to charmonium hep-ph · Mar 2015
- Analysis of the resonant components in B0->J/\psi pi+pi- hep-ex · Jan 2013
- A Roadmap to Control Penguin Effects in $B^0_d\to J/\psi K_{\rm S}^0$ and $B^0_s\to J/\psi \phi$ hep-ph · Dec 2014
- Determining weak phases from B->J/Psi P decays hep-ph · Jun 2012
- Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era hep-ex · Aug 2018
- Opportunities in Flavour Physics at the HL-LHC and HE-LHC hep-ph · Dec 2018
- Averages of b-hadron, c-hadron, and tau-lepton Properties hep-ex · Oct 2010
How the literature uses it
12 arXiv papers cite this in 17 sentences
Papers citing it · 5 sentences without a confident label
Uses its data or values 3 papers
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The previous result from Belle was based on $535×10^6$ $$ pairs [ref] .
Measurement of the branching fraction and time-dependent $CP$ asymmetry for $B^0\to J/\psi\pi^0$ decays · Introduction · 0.84
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The Belle analysis is based on $535$ million $BB$ pairs which provides $290$ signal events [ref] .
Direct CP violation in B decays · $B^0→π^0$ · 0.84
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Indeed, current measurements [ref] , $C(J/ψπ^0)= -0.10±0.13, S(J/ψπ^0)=-0.93±0.15$, are not sufficiently accurate for providing useful information about $ξ$.
Doubly CKM-suppressed corrections to CP asymmetries in $B^0 \to J/\psi K^0$ · Introduction · 0.88
Compares with it 6 papers
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As a novel feature, the method of Ref. [ref] permits the prediction of the penguin contributions to $b →c c d$ decays, for example: [equation] The first result means $-0.86≤S_J/ψπ^0 ≤-0.50$. eq:pi0 favours the Belle result [ref] $S_J/ψπ^0=-0.67±0.22$, $C_J/ψπ^0=-0.08±0.17$ over the BaBar result [ref] $S_J/ψπ^0=-1.23±0.21$, $C_J/ψπ^0=-0.20±0.19$.
Penguin pollution in $\beta$ and $\beta_s$ · Matrix elements and numerical results · 0.93
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The parameter $𝒮$ for $→$ has previously been measured by Belle [ref] and BaBar [ref] , but the results are not in good agreement.
Measurement of the branching fraction and time-dependent $CP$ asymmetry for $B^0\to J/\psi\pi^0$ decays · Introduction · 0.81
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The parameter $𝒮$ for $→$ has previously been measured by Belle [ref] and BaBar [ref] , but the results are not in good agreement.
Measurements of $B^0\to J/\psi\pi^0$ and other CP violating modes at Belle · Branching fraction and asymmetries of $→$ · 0.89
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