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Calculation of the Branching Ratio for D+→K0l+νl Decay

WANG Guang huai1, LIU Xiao jing1, GONG Pi feng2, ZHAO Shu hua1, GUO Yi qing3   

  1. 1. College of Physics, Jilin Normal University, Siping 136000, Jilin Province, China; 2. Department of Physics, Huaibei Coal Industry Teacher’s College, Huaibei 235000, Anhui Province, China; 3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
  • Received:2005-11-07 Revised:1900-01-01 Online:2006-09-26 Published:2006-09-26
  • Contact: WANG Guang huai

Abstract: The D+→K0l+νl decay was researched by means of QCD sum rules. Firstly, the form factor of D→K was calculated by chosing a new correlative function to eliminate the effect caused by the uncertainty of twist-3 function, so the calculation result of the form factor is more precisely, and the branch ratio is consistent with the experimental data.

Key words: QCD sum rule, D semileptonic decay, branching ratio, form factor 

CLC Number: 

  • O572.33