Charmed baryon decay asymmetry in e<sup>+</sup>e<sup>-</sup> annihilation

Dan Wang; Rong-Gang Ping; Lei Li; Xiao-Rui Lyu; Yang-Heng Zheng

doi:10.1088/1674-1137/41/2/023106

Chinese Physics C> 2017, Vol. 41> Issue(2) : 023106 DOI: 10.1088/1674-1137/41/2/023106

Charmed baryon decay asymmetry in e⁺e^- annihilation

Dan Wang ¹ ,
Rong-Gang Ping ^2,, ,
Lei Li ^3,, ,
Xiao-Rui Lyu ^1,4,, ,
Yang-Heng Zheng ^1,4,,

1.
University of Chinese Academy of Science, Beijing 100049, China
2.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.
Beijing Institute of Petrochemical Technology, Beijing 102617, China
4.
University of Chinese Academy of Science, Beijing 100049, China
5.
CAS Key Laboratory of Vacuum Physics, UCAS, Beijing 100049, China

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Abstract：
We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λ_c⁺→Λπ⁺,Σ⁰π⁺,pK₀, Ξ_c⁰→Ξ^-π⁺ and Ω_c⁰→Ω^-π⁺. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in e⁺e^- annihilation data. Base on the current Λ_c⁺ data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters α_Λπ⁺ for Λ_c⁺→Λπ⁺, α_Σ⁺π⁰ for Λ_c⁺→Σ⁺π⁰ and α_Σ⁰π⁺ for Λ_c⁺→Σ⁰π⁺.
- charmed baryon decay ,
- decay asymmetry ,
- e+e- collider

References

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Dan Wang, Rong-Gang Ping, Lei Li, Xiao-Rui Lyu and Yang-Heng Zheng. Charmed baryon decay asymmetry in e⁺e^- annihilation[J]. Chinese Physics C, 2017, 41(2): 023106. doi: 10.1088/1674-1137/41/2/023106

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Received: 2016-09-12

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Supported by National Natural Science Foundation of China (11375205, 11175146, 11275266, 11235011, 11425524, 11505010, 11565006), Beijing Municipal Government Foundation (KM201610017009, 2015000020124G064), Youth Innovation Promotion Association of CAS.

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Charmed baryon decay asymmetry in e⁺e^- annihilation

Corresponding author: Rong-Gang Ping,

Corresponding author: Lei Li,

Corresponding author: Xiao-Rui Lyu,

Corresponding author: Yang-Heng Zheng,

1. University of Chinese Academy of Science, Beijing 100049, China
2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3. Beijing Institute of Petrochemical Technology, Beijing 102617, China
4. University of Chinese Academy of Science, Beijing 100049, China
5. CAS Key Laboratory of Vacuum Physics, UCAS, Beijing 100049, China

Received Date: 2016-09-12
Available Online: 2017-02-05

Fund Project: Supported by National Natural Science Foundation of China (11375205, 11175146, 11275266, 11235011, 11425524, 11505010, 11565006), Beijing Municipal Government Foundation (KM201610017009, 2015000020124G064), Youth Innovation Promotion Association of CAS.

Abstract: We propose to measure the decay asymmetry parameters in the hadronic weak decays of singly charmed baryons, such as Λ_c⁺→Λπ⁺,Σ⁰π⁺,pK₀, Ξ_c⁰→Ξ^-π⁺ and Ω_c⁰→Ω^-π⁺. The joint angular formulae for these processes are presented, and are used to extract the asymmetry parameters in e⁺e^- annihilation data. Base on the current Λ_c⁺ data set collected at BESIII, we estimate the experimental sensitivities to measure the parameters α_Λπ⁺ for Λ_c⁺→Λπ⁺, α_Σ⁺π⁰ for Λ_c⁺→Σ⁺π⁰ and α_Σ⁰π⁺ for Λ_c⁺→Σ⁰π⁺.