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Direct measurement of the mass difference between top and antitop quarks

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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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D0 Collaboration: V. Abazov, et al

High Energy Physics - Experiment · Submitted 5 Jun 2009

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

The authors' main claim The observed mass difference of 3.8+-3.7 GeV is consistent with the equality of t and tbar masses.

how it is stated · hedged possibility 0.95 read the record →

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arXiv ID0906.1172 (version 3)
Pith ID46PGNGV6, Pith's permanent record of this paper and its review
CitationD0 Collaboration: V. Abazov, et al. "Direct measurement of the mass difference between top and antitop quarks." arXiv:0906.1172 (2009). https://pith.science/paper/46PGNGV6
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, 2,996 input tokens, $0.0001 reported.

What the abstract itself states, as probabilities: claims first 0.97 · states limitation 0.31 · human participants 0.02 · controlled comparison 0.12 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.22 · mentions code or data availability 0.02.

The abstract, sentence by sentence

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

We present a measurement of the mass difference between t and tbar quarks observed in lepton+jets final states of ttbar events in 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider in ppbar collisions at sqrt(s)=1.96 TeV. The observed mass difference of 3.8+-3.7 GeV is consistent with the equality of t and tbar masses. This is the first direct measurement of a mass difference between a quark and its antiquark partner.

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 present a measurement of the mass difference between t and tbar quarks observed in lepton+jets final states of ttbar events in 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider in ppbar collisions at sqrt(s)=1.96 TeV. contribution 0.76 0.97 0.07 asserted 1.00
s1 The observed mass difference of 3.8+-3.7 GeV is consistent with the equality of t and tbar masses. result 0.91 0.96 0.86 hedged possibility 0.95
s2 This is the first direct measurement of a mass difference between a quark and its antiquark partner. contribution 0.85 0.86 0.11 asserted 1.00

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.86.

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 present a measurement of the mass difference between t and tbar quarks observed in lepton+jets final states of ttbar events in 1 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider in ppbar collisions at sqrt(s)=1.96 TeV. The observed mass difference of 3.8+-3.7 GeV is consistent with the equality of t and tbar masses. This is the first direct measurement of a mass difference between a quark and its antiquark partner.

Human review

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How the literature uses it

6 arXiv papers cite this in 8 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 · 6 sentences without a confident label

Uses its data or values 2 papers
  • The result is $- m_t̅ = 3.8 ±3.4 () ±1.2 ()$ [ref] , consistent with CPT invariance.

    Top Quark Physics at the Tevatron · Mass Difference · 0.91

  • The two channels are then combined by a weighted average which yields Δ=3.8±3.7in good agreement with the CPT-theorem expectation of zero [ref] .

    Properties of the Top Quark · Matrix Element Method · 0.91

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