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INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH (IISER) PUNE
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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="\\&quot;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="\\&quot;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.

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