Updated September 2013 by C,W. Bauer （LBNL） and M. Neubert （U. Mainz）.17.1. Effective Field Theories Quantum field theories represent the most precise computational tool for describing physics at the highest energ...Updated September 2013 by C,W. Bauer （LBNL） and M. Neubert （U. Mainz）.17.1. Effective Field Theories Quantum field theories represent the most precise computational tool for describing physics at the highest energies. One of their characteristic features is that they almost inevitably involve multiple length scales. When trying to determine the value of an observable,展开更多
Effects of Glauber gluons,which cause the elastic scattering process between different jets,are studied in the frame of soft-collinear effective theory.Glauber modes are added into the action before being integrated o...Effects of Glauber gluons,which cause the elastic scattering process between different jets,are studied in the frame of soft-collinear effective theory.Glauber modes are added into the action before being integrated out,which is helpful in studies on the Glauber couplings of collinear and soft particles.It is proved that the final state interactions cancel out for processes inclusive enough.So are interactions with the light cone coordinates x^(+)and x^(-)greater than those of the hard collision.The eikonalization of Glauber couplings of active particles and absorption of these couplings into soft and collinear Wilson lines are discussed,which is related to the loop level definitions of Glauber gluons here.The active-spectator coherence is proved to be harmless to the inclusive summation of spectator-spectator and spectator-soft Glauber exchanges.Based on this result,spectator-spectator and spectator-soft Glauber exchanges cancel out in the processes considered here.Graphic aspects of the cancellation are also discussed to explain relations between the graphic and operator level cancellation of Glauber gluons.展开更多
文摘Updated September 2013 by C,W. Bauer （LBNL） and M. Neubert （U. Mainz）.17.1. Effective Field Theories Quantum field theories represent the most precise computational tool for describing physics at the highest energies. One of their characteristic features is that they almost inevitably involve multiple length scales. When trying to determine the value of an observable,
基金supported by The National Nature Science Foundation of China under Grant No.11805151The Scientific Research Foundation for the Doctoral Program of Xi’an University of Science and Technology under Grant No.6310116055+3 种基金The Scientific Fostering Foundation of Xi’an University of Science and Technology under Grant No.201709supported by The Department of Shanxi Province Natural Science Foundation of China under Grant No.2015JM1027supported by China Postdoctoral Foundation under Grant No.2015M581824,20161001International Postdoctoral Exchange Fellowship Program between JUELICH and OCPC。
文摘Effects of Glauber gluons,which cause the elastic scattering process between different jets,are studied in the frame of soft-collinear effective theory.Glauber modes are added into the action before being integrated out,which is helpful in studies on the Glauber couplings of collinear and soft particles.It is proved that the final state interactions cancel out for processes inclusive enough.So are interactions with the light cone coordinates x^(+)and x^(-)greater than those of the hard collision.The eikonalization of Glauber couplings of active particles and absorption of these couplings into soft and collinear Wilson lines are discussed,which is related to the loop level definitions of Glauber gluons here.The active-spectator coherence is proved to be harmless to the inclusive summation of spectator-spectator and spectator-soft Glauber exchanges.Based on this result,spectator-spectator and spectator-soft Glauber exchanges cancel out in the processes considered here.Graphic aspects of the cancellation are also discussed to explain relations between the graphic and operator level cancellation of Glauber gluons.
