A New Approach of the Kinematic Fit

ZHU Cheng-Guang; CHEN Ting-Yang; ZHANG Nai-Jian; HE Mao

Chinese Physics C> 2003, Vol. 27> Issue(5) : 440-444

A New Approach of the Kinematic Fit

Department of Physics,Shandong University,Ji′,nan 250100, China2 Department of Physics,Nanjing University,Nanjing 210008,China

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Abstract：
A new approach of the kinematic fit in event reconstruction is introduced.In the new approach, the method of regula falsi is used to solve the constraint equations, instead of the conventional linear approximation. Applying this algorithm to E705/E771 Monte Carlo data of J/ψ→μ⁺+μ^－,the momentum resolution of J/ψ is significantly improved.

References

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. Yoshihide Sakai.Nucl.Instr.and Meth.,1933,A333:422. Carnaham Brice,Luther H A,James O,Wilkers.Applied Numeric Method.John Wiley Sons,Inc.,19693. Ronne B.3rd CERN School of Physics,1965,CERN 64–134. Ketikian A J,Komissarov E V,Kurbatov V S,Silin IN.Nucl.Instr.and Meth.,1992,A314:5725. CHEN Ting-Yang,YAO Nai-Guo.Nucl.Instr.and Meth.,1990,A290:3906. LI Qing-Yang,MO Zi-Zhong,QI Li-Qun.Numerical Solution of Nonlinear Simultaneous Equations.Science Press,1987,87:89(in Chinese)(李庆扬,莫孜中,祁力群.非线性方程组的数值解法.科学出版社,1987,87:89)

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ZHU Cheng-Guang, CHEN Ting-Yang, ZHANG Nai-Jian and HE Mao. A New Approach of the Kinematic Fit[J]. Chinese Physics C, 2003, 27(5): 440-444.

ZHU Cheng-Guang, CHEN Ting-Yang, ZHANG Nai-Jian and HE Mao. A New Approach of the Kinematic Fit[J]. Chinese Physics C, 2003, 27(5): 440-444. shu

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Received: 2002-07-30
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

A New Approach of the Kinematic Fit

Corresponding author: ZHU Cheng-Guang,

Department of Physics,Shandong University,Ji′,nan 250100, China2 Department of Physics,Nanjing University,Nanjing 210008,China

Received Date: 2002-07-30
Accepted Date: 1900-01-01
Available Online: 2003-05-05

Abstract: A new approach of the kinematic fit in event reconstruction is introduced.In the new approach, the method of regula falsi is used to solve the constraint equations, instead of the conventional linear approximation. Applying this algorithm to E705/E771 Monte Carlo data of J/ψ→μ⁺+μ^－,the momentum resolution of J/ψ is significantly improved.