KEK素粒子原子核研究所・理論セミナー/Dr.Vazquez-Mozo

分類理論セミナー
開始2017/10/17(火)11:00
終了2017/10/17(火)12:00
会場Kenkyu-Honkan 1F, Meeting Room 3
講演タイトルPlanar Zeros in Field and String Theory Amplitudes
講演者Dr.Miguel Vazquez-Mozo (Universidad de Salamanca)
言語英語/English
連絡先Takao Suyama/tsuyama-AT-post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要


Abstract:
Planar zeros are an interesting feature of certain scattering amplitudes
with one or more gauge bosons radiated, consisting in the vanishing of
the
amplitude for configurations where all momenta lie on a single plane. In
this talk I shall study these planar zeros in various field theories at
tree-level. In the case of theories with gauge invariance, the zeros are
determined by the vanishing of a homogeneous polynomial in the
stereographic coordinates determining the direction of flight of the
particles involved. This projective property is absent in pure scalar
theories. In gravitational theories, on the other hand, amplitudes
vanish
whenever the scattering is planar. String theory corrections to the
field
theory amplitudes spoil the projective nature of gauge planar zeros, as
well as the vanishing of gravitational planar amplitudes.

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