Observation of a Broad Structure in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>π</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math>Mass Spectrum around<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>4.26</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi><mml:mo>/</mml:mo><mml:msup><mml:mi>c</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>

2005· article· lv· 747 citations· W2143409986 on OpenAlex· 10.1103/physrevlett.95.142001

Why is this work in the frame?

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

Canadian affiliationAn author listed a Canadian institution. This is the only route the usual frame has.

Canadian funderA Canadian agency funded it. The work may carry no Canadian affiliation at all.

Full frame distilled prediction

Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

Candidate categories: Meta-epidemiology (narrow), Meta-epidemiology (broad), Science and technology studies, Scholarly communication, Open science, Research integrity, Insufficient payload (model declined to judge)
Consensus categories: Meta-epidemiology (narrow), Science and technology studies, Open science, Research integrity, Insufficient payload (model declined to judge)
Domain: Candidate signal: noneConsensus signal: none
Study design: Candidate signal: Theoretical or conceptualConsensus signal: none
Genre: Candidate signal: EmpiricalConsensus signal: Empirical
Teacher disagreement score: 0.804
Threshold uncertainty score: 1.000
Validation status: machine_predicted_unvalidated · codex-gemma-dda1882f352a

Codex and Gemma teacher scores by category

Category	Codex	Gemma
Metaresearch	0.006	0.004
Meta-epidemiology (narrow)	0.006	0.009
Meta-epidemiology (broad)	0.003	0.010
Bibliometrics	0.002	0.006
Science and technology studies	0.008	0.009
Scholarly communication	0.006	0.007
Open science	0.010	0.009
Research integrity	0.007	0.009
Insufficient payload (model declined to judge)	0.046	0.010

Machine scores (provisional)

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Opus teacher head0.018

GPT teacher head0.255

Teacher spread: 0.237 · how far apart the two teachers sit on this one work
Validation status: score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Abstract

We study initial-state radiation events, e+ e- --> gammaISR pi+ pi- J/psi, with data collected with the BABAR detector. We observe an accumulation of events near 4.26 GeV/c2 in the invariant-mass spectrum of pi+ pi- J/psi. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c2 is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90 MeV/c2, depending on the fit hypothesis.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

The record

Venue: Physical Review Letters
Topic: Particle physics theoretical and experimental studies
Field: Physics and Astronomy
Canadian institutions: University of VictoriaUniversité de MontréalMcGill UniversityUniversity of British Columbia
Funders: Institut National de Physique Nucléaire et de Physique des ParticulesInstitute of High Energy PhysicsNatural Sciences and Engineering Research Council of CanadaCentre National de la Recherche ScientifiqueBundesministerium für Bildung und ForschungSLAC National Accelerator LaboratoryAlexander von Humboldt-StiftungAlfred P. Sloan FoundationDeutsche ForschungsgemeinschaftU.S. Department of EnergyNational Science Foundation
Keywords: PhysicsResonance (particle physics)Particle physicsSpectral lineInvariant massCrystallographyQuantum mechanics
Has abstract in OpenAlex: yes
API: /api/v1/works/W2143409986