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学术报告:String amplitudes and field theory amplitudes

来源:  发布时间:2019-01-04 14:58:44 点击次数:

报告题目:String amplitudes and field theory amplitudes

报告人:张勇 博士(中国科学院理论物理研究所)

报告时间:201917日(周一)下午1430  

报告地点:物理学院新楼D-502


报告摘要:

We present an integration-by-parts reduction of any massless tree-level string correlator to an equivalence class of logarithmic functions, which can be used to define a field-theory amplitude via a Cachazo-He-Yuan (CHY) formula. The string amplitude is then shown to be the double copy of the field-theory one and a special disk/sphere integral. The construction is generic as it applies to any correlator that is a rational function of correct SL(2) weight. By applying the reduction to open bosonic/heterotic strings, we get a closed-form CHY integrand for the (DF )2 + YM + φ3 theory.




邀请人:杜一剑副教授


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