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2010•Chinese Physics CRequires access

Study a 0 (980)-f 0 (980) mixing in charmonium decays

Jia-Jun Wu, ZHAO Qiang, ZOU Bing-Song

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Abstract

In this proceeding, we propose to directly measure the a00(980)-f0 (980) mixing in J/ψ → f0(980) → a00 (980) and χc1 → π0a00(980) → π0f0(980) with the upgraded Beijing Electron Positron Collider(BEPCII) with BESIII detector. We show that a narrow peak of about 8 MeV will be produced by the a00(980)-f0 (980) mixing, and the predominant feature makes it standing out from the background contributions. The predicted branching ratios for these two reactions are both expected to be about O(10−6), which is unambiguously accessible with 109 J/ψ and 3 × 108 χc1 at BESIII.

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What this paper is about

In this proceeding, we propose to directly measure the a00(980)-f0 (980) mixing in J/ψ → f0(980) → a00 (980) and χc1 → π0a00(980) → π0f0(980) with the upgraded Beijing Electron Positron Collider(BEPCII) with BESIII detector. We show that a narrow peak of about 8 MeV will be produced by the a00(980)-f0 (980) mixing, and the predominant feature makes it standing out from the background contributions. The predicted branching ratios for these two reactions are both expected to be about O(10−6), which is unambiguously accessible with 109 J/ψ and 3 × 108 χc1 at BESIII.

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Available abstract

In this proceeding, we propose to directly measure the a00(980)-f0 (980) mixing in J/ψ → f0(980) → a00 (980) and χc1 → π0a00(980) → π0f0(980) with the upgraded Beijing Electron Positron Collider(BEPCII) with BESIII detector. We show that a narrow peak of about 8 MeV will be produced by the a00(980)-f0 (980) mixing, and the predominant feature makes it standing out from the background contributions. The predicted branching ratios for these two reactions are both expected to be about O(10−6), which is unambiguously accessible with 109 J/ψ and 3 × 108 χc1 at BESIII.

Key concepts: Physics, Collider, Mixing (physics), Nuclear physics, Particle physics, Positron, Branching fraction, Detector

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