We study the application of BCFW recursion relations to the QED process 0→e^(-)e^(+)nγ.Based on 6-point amplitudes(both MHVA and NMHVA)computed from Feynman diagrams in the Berends-Giele gauge,we conduct a comprehen...We study the application of BCFW recursion relations to the QED process 0→e^(-)e^(+)nγ.Based on 6-point amplitudes(both MHVA and NMHVA)computed from Feynman diagrams in the Berends-Giele gauge,we conduct a comprehensive study on different shifts.Subsequently,we propose a new shift(LLYZ shift),which can lead to the full amplitudes of these processes and have several realistic computational advantages.We compare the number of terms and independent amplitudes of this novel shift with those of a few typical shifts.展开更多
基金Supported by the Natural Science Foundation of China (11475180, 11875260)Supported by the Italian Ministry of Research (MUR)(PRIN20172LNEEZ)
文摘We study the application of BCFW recursion relations to the QED process 0→e^(-)e^(+)nγ.Based on 6-point amplitudes(both MHVA and NMHVA)computed from Feynman diagrams in the Berends-Giele gauge,we conduct a comprehensive study on different shifts.Subsequently,we propose a new shift(LLYZ shift),which can lead to the full amplitudes of these processes and have several realistic computational advantages.We compare the number of terms and independent amplitudes of this novel shift with those of a few typical shifts.
