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Analytical Behaviour of Positronium Decay Amplitudes

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G. Lopez Castro, J. Pestieau, C. Smith, S. Trine

High Energy Physics - Phenomenology · Submitted 1 Jun 2000

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

The authors' main claim Using dispersion techniques, we find new contributions that interfere with the known results to restore analytical properties.

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arXiv IDhep-ph/0006018 (version 1)
Pith IDDJ7RCQ5D, Pith's permanent record of this paper and its review
CitationC. Smith, G. Lopez Castro, J. Pestieau, S. Trine. "Analytical Behaviour of Positronium Decay Amplitudes." arXiv:hep-ph/0006018 (2000). https://pith.science/paper/DJ7RCQ5D
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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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Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,536 input tokens, $0.0001 reported.

What the abstract itself states, as probabilities: claims first 0.07 · states limitation 0.23 · human participants 0.01 · controlled comparison 0.09 · randomized assignment 0.01 · states quantitative result 0.33 · compares with prior results 0.90 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons do not exhibit good analytical behaviour. Using dispersion techniques, we find new contributions that interfere with the known results to restore analytical properties. Those new amplitudes which cannot be obtained using standard factorized amplitude formalism, contribute at order alpha^2. Therefore they have to be evaluated before any theoretical conclusion can be drawn upon the orthopositronium lifetime puzzle.

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 Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons do not exhibit good analytical behaviour. background 0.79 0.24 0.14 asserted 1.00
s1 Using dispersion techniques, we find new contributions that interfere with the known results to restore analytical properties. contribution 0.46 0.95 0.38 asserted 1.00
s2 Those new amplitudes which cannot be obtained using standard factorized amplitude formalism, contribute at order alpha^2. result 0.93 0.72 0.18 asserted 1.00
s3 Therefore they have to be evaluated before any theoretical conclusion can be drawn upon the orthopositronium lifetime puzzle. interpretation 0.79 0.17 0.40 asserted 0.99

What kind of paper the classifier reports this is: theoretical result 1.00 · evidence from proof or derivation 1.00.

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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

Positronium annihilation amplitudes that are computed by assuming a factorization approximation with on-shell intermediate leptons do not exhibit good analytical behaviour. Using dispersion techniques, we find new contributions that interfere with the known results to restore analytical properties. Those new amplitudes which cannot be obtained using standard factorized amplitude formalism, contribute at order alpha^2. Therefore they have to be evaluated before any theoretical conclusion can be drawn upon the orthopositronium lifetime puzzle.

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