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  1. SEP

    28

    Thursday

    RIKEN Lunch Seminar

    "Color Memory, Large Gauge Transformations, and Soft Theorems in Yang-Mills Theory"

    Presented by Monica Pate, Harvard University

    12:30 pm, Small Seminar Room, Bldg. 510

    Thursday, September 28, 2017, 12:30 pm

    Hosted by: ''Hiromichi Nishimura''

    An infinite dimensional symmetry group which governs the infrared sectors of gauge and gravity theories has been recently discovered. This symmetry can be established both from an asymptotic symmetry analysis as well as from the corresponding Ward identities which are quantum field theoretic soft theorems. Moreover, the spontaneous breaking of these symmetries induces vacuum transitions which are detectable by charged particles through the so-called memory effect. In this seminar, I will explain the precise equivalence between asymptotic symmetries, soft theorems and memory effects in the context of tree level Yang-Mills. In particular, in this context the soft gluon theorem is Ward identity of a large gauge symmetry, whose action on the vacuum can be measured from the relative color charge of colored detectors.

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