Study of Λ decay parameter in J/ψ→ΛΛ decay

ZHONG Bin; PING Rong-Gang; XIAO Zhen-Jun

doi:10.1088/1674-1137/32/9/003

Chinese Physics C> 2008, Vol. 32> Issue(9) : 692-696 DOI: 10.1088/1674-1137/32/9/003

Study of Λ decay parameter in J/ψ→ΛΛ decay

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Abstract：
The helicity amplitudes for J/ψ→ΛΛ and the relevant background decays are presented for measuring the Λ decay parameter α₊(Λ→pπ⁺) in J/ψ→ΛΛ . The Monte Carlo (MC) simulations based on the helicity amplitudes information are carried out. The likelihood fit method to determine the Λ decay parameter is presented. Based on the MC generated sample, the sensitivity of the measurement for α₊ has been estimated, which shows that the J/ψ→ΛΛ channel can be used to measure the Λ decay parameter α₊(Λ→pπ⁺) well.

References

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ZHONG Bin, PING Rong-Gang and XIAO Zhen-Jun. Study of Λ decay parameter in J/ψ→ΛΛ decay[J]. Chinese Physics C, 2008, 32(9): 692-696. doi: 10.1088/1674-1137/32/9/003

ZHONG Bin, PING Rong-Gang and XIAO Zhen-Jun. Study of Λ decay parameter in J/ψ→ΛΛ decay[J]. Chinese Physics C, 2008, 32(9): 692-696. doi: 10.1088/1674-1137/32/9/003 shu

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Received: 2007-12-03
Revised: 2008-01-21

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Λ decay parameter in J/ψ→ΛΛ decay

Corresponding author: ZHONG Bin,

Received Date: 2007-12-03
Accepted Date: 2008-01-21
Available Online: 2008-09-05

Abstract:

The helicity amplitudes for J/ψ→ΛΛ and the relevant background decays are presented for measuring the Λ decay parameter α₊(Λ→pπ⁺) in J/ψ→ΛΛ . The Monte Carlo (MC) simulations based on the helicity amplitudes information are carried out. The likelihood fit method to determine the Λ decay parameter is presented. Based on the MC generated sample, the sensitivity of the measurement for α₊ has been estimated, which shows that the J/ψ→ΛΛ channel can be used to measure the Λ decay parameter α₊(Λ→pπ⁺) well.