Seminars and Colloquia
Physics
Generalised coherent states in QCD from asymptotic symmetries
Fri, Feb 28, 2020,
04:00 PM
at Seminar Hall 31, 2nd Floor, Main Building
Dr. Athira P V
Chennai Mathematical Institute
<span data-mce-style="\\"color:" #000000;="" font-style:="" normal;="" font-variant-ligatures:="" font-variant-caps:="" font-weight:="" 400;="" letter-spacing:="" orphans:="" 2;="" text-align:="" start;="" text-indent:="" 0px;="" text-transform:="" none;="" white-space:="" widows:="" word-spacing:="" -webkit-text-stroke-width:="" background-color:="" #ffffff;="" text-decoration-style:="" initial;="" text-decoration-color:="" float:="" display:="" inline="" !important;\\"="" style="\\"text-align:" rgb(255,="" 255,="" 255);="">Ward Identity related to the asymptotic symmetry of S matrix plays an important role in understanding the infrared structure of gauge theory and gravity. However, the S matrix is infrared divergent in four dimensions due to massless particles in the theory. Faddeev and Kulish have developed a formalism to construct infrared finite S matrix by working with asymptotic states instead of Fock states. We discuss the Ward identity in these asymptotic states in the context of QCD.
