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Einstein Yang-Mills amplitudes from intersections of twisted forms
A bstract We present a geometric derivation of all-multiplicity (single-trace) tree-level Einstein Yang-Mills (EYM) amplitudes $$ \mathcal{A} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>A</mml:mi> </mml:math> ( n ; r ) involving n gluons and r gravitons by a bilinear of two twisted differential forms on the moduli space of Riemann spheres with m …