The orthopositronium decay puzzle and primordial nucleosynthesis

R. Escribano; E. Massó; R. Toldrà

doi:10.1016/0370-2693(95)00797-O

The orthopositronium decay puzzle and primordial nucleosynthesis

R. Escribano, E. Massó, R. Toldrà

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

9 Citations (Scopus)

Abstract

The discrepancy between the experimental decay rate of orthopositronium (o-Ps) and the QED theoretical prediction can be solved by invoking decays of o-Ps into exotic particles with branching ratios ∼ 10-3. We show that considerations based on primordial nucleosynthesis and effective Lagrangians place a very stringent upper bound: B ≡ Γ (o-Ps → "exotic" + ...) Γ(o-Ps) ≤ 2 × 10-15, ruling out the exotic decay solution to the puzzle. © 1995.

Original language	English
Pages (from-to)	313-318
Journal	Physics Letters B
Volume	356
Issue number	2-3
DOIs	https://doi.org/10.1016/0370-2693(95)00797-O
Publication status	Published - 17 Aug 1995

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abstract = "The discrepancy between the experimental decay rate of orthopositronium (o-Ps) and the QED theoretical prediction can be solved by invoking decays of o-Ps into exotic particles with branching ratios ∼ 10-3. We show that considerations based on primordial nucleosynthesis and effective Lagrangians place a very stringent upper bound: B ≡ Γ (o-Ps → {"}exotic{"} + ...) Γ(o-Ps) ≤ 2 × 10-15, ruling out the exotic decay solution to the puzzle. {\textcopyright} 1995.",

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AU - Toldrà, R.

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AB - The discrepancy between the experimental decay rate of orthopositronium (o-Ps) and the QED theoretical prediction can be solved by invoking decays of o-Ps into exotic particles with branching ratios ∼ 10-3. We show that considerations based on primordial nucleosynthesis and effective Lagrangians place a very stringent upper bound: B ≡ Γ (o-Ps → "exotic" + ...) Γ(o-Ps) ≤ 2 × 10-15, ruling out the exotic decay solution to the puzzle. © 1995.

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DO - 10.1016/0370-2693(95)00797-O

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