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Observation of Ds+ K- and evidence for Ds+ pi- final states in neutral B decays

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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P. Krokovny, et al, The Belle Collaboration

High Energy Physics - Experiment · Submitted 25 Jul 2002

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

The authors' main claim We report the first observation of a B meson decay that is not accessible by a direct spectator process.

how it is stated · asserted 1.00 read the record →

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arXiv IDhep-ex/0207077 (version 3)
Pith IDLXEMTW7N, Pith's permanent record of this paper and its review
Citationet al, P. Krokovny, The Belle Collaboration. "Observation of Ds+ K- and evidence for Ds+ pi- final states in neutral B decays." arXiv:hep-ex/0207077 (2002). https://pith.science/paper/LXEMTW7N
Claim paper

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.

Open the compiled record

Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,754 input tokens, $0.0002 reported.

What the abstract itself states, as probabilities: claims first 0.95 · states limitation 0.75 · human participants 0.01 · controlled comparison 0.02 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.10 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v3. Results and the main claim are underlined; .

We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel B0bar -> Ds+ K- is found in a sample of 85 timse 10^6 B Bbar events, collected with the Belle detector at KEKB, with a branching fraction Br(B0bar -> Ds+ K-)=(4.6^{+1.2}_{-1.1} +- 1.3) times 10^{-5}. We also obtain evidence for the B0 -> Ds+ pi- decay with branching fraction Br(B0 -> Ds+ pi-)=(2.4^{+1.0}_{-0.8} +- 0.7) times 10^{-5}. This value may be used to extract a model-dependent value of |Vub|.

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 We report the first observation of a B meson decay that is not accessible by a direct spectator process. contribution 0.52 0.94 0.73 asserted 1.00
s1 The channel B0bar -> Ds+ K- is found in a sample of 85 timse 10^6 B Bbar events, collected with the Belle detector at KEKB, with a branching fraction Br(B0bar -> Ds+ K-)=(4.6^{+1.2}_{-1.1} +- 1.3) times 10^{-5}. result 1.00 0.97 0.45 asserted 1.00
s2 We also obtain evidence for the B0 -> Ds+ pi- decay with branching fraction Br(B0 -> Ds+ pi-)=(2.4^{+1.0}_{-0.8} +- 0.7) times 10^{-5}. result 1.00 0.97 0.13 asserted 0.68
s3 This value may be used to extract a model-dependent value of |Vub|. interpretation 0.99 0.41 0.07 hedged possibility 1.00

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.92.

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
levels run
  • P abstract
not run
  • 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

We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel B0bar -> Ds+ K- is found in a sample of 85 timse 10^6 B Bbar events, collected with the Belle detector at KEKB, with a branching fraction Br(B0bar -> Ds+ K-)=(4.6^{+1.2}_{-1.1} +- 1.3) times 10^{-5}. We also obtain evidence for the B0 -> Ds+ pi- decay with branching fraction Br(B0 -> Ds+ pi-)=(2.4^{+1.0}_{-0.8} +- 0.7) times 10^{-5}. This value may be used to extract a model-dependent value of |Vub|.

Human review

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How the literature uses it

2 arXiv papers cite this in 2 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 citing it · 1 sentence without a confident label

Uses its data or values 1 paper
  • Experimentally, one finds [ref] $(̱B^0→D^-_sK^+)=(2.9±0.5)×10^-5$, in comparison with [ref] $(̱B^0→D^-π^+)=(2.68±0.13)×10^-3$ which is two orders of magnitude larger.

    B decays dominated by omega-phi mixing · Introduction · 0.88

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