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Observation of the ...
Observation of the decay J/Ψ → e+e-η(1405) with η(1405) → π0f0(980)
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- Ablikim, M. (author)
- Inst High Energy Phys, Beijing 100049, Peoples R China
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- Adlarson, Patrik (author)
- Uppsala universitet,Kärnfysik
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- Johansson, Tord (author)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (author)
- Uppsala universitet,Kärnfysik,Natl Ctr Nucl Res, PL-02093 Warsaw, Poland
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- Schönning, Karin, 1978- (author)
- Uppsala universitet,Kärnfysik
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- Thorén, Viktor (author)
- Uppsala universitet,Kärnfysik
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- Wolke, Magnus (author)
- Uppsala universitet,Kärnfysik
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- Zu, J. (author)
- State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China;Univ Sci & Technol China, Hefei 230026, Peoples R China
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(creator_code:org_t)
- American Physical Society, 2024
- 2024
- English.
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In: Physical Review D. - : American Physical Society. - 2470-0010 .- 2470-0029. ; 109:1
- Related links:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Using a data sample of (10087 ± 44) x 106 J/ψ events collected by the BESIII detector in 2009, 2012, 2018 and 2019, the electromagnetic Dalitz process J/ψ → e+e-η(1405) is observed via the decay η(1405) → π0f0(980), f0(980) → π+π-, with a significance of about 9.8σ. The branching fraction of this decay is measured to be B(J/ψ → e+e−η(1405) → e+e−π0f0(980) → J/ψ→ e+e-η(1405) → e+e-π0f0(980) → e+e-π0π+ π-) = (2.04 ± 0.20(stat) ± 0.08(syst)) x 10-7. The branching fraction ratio B(J/ψ → e+e- η(1405))/B(J/ψ → γη(1405)) is determined to be (1.36 ± 0.17(stat) ± 0.06(syst)) x 10-2. Furthermore, an e+e- invariant mass dependent transition form factor of J/ψ → e+e-η(1405) is presented for the first time. The obtained result provides input for different theoretical models and is valuable for the improved understanding the intrinsic structure of the η(1405) meson.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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