Primordial trispectrum and orthogonal non-Gaussianities

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TrispectrumTwo-parameter family of shapes. For any A, T interpolatesbetween highly correlated and anti-correlated with Tc1 as Bgoes from large negative to positive values. A shapequalitatively different from Tc1 necessarily arises in theneighborhood of a particular value of B (function of A).Around which value? How narrow is this region?What does the shape look like? How does it vary with A?
Orthogonal trispectrumIn 1302.6978, we concentrated on the region 3.1< A < 4.2where the orthogonal bispectrum arises, motivated by thehints of a large orthogonal bispectrum in WMAP9 analysis.Visual inspection of shapes invarious representative limits:Tc1 is representative only forA qualitatively different shapearises in the complementaryregion, centered around:The shapes of these various orthogonal trispectra dependvery weakly on A
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Primordial trispectrum and orthogonal non-Gaussianities

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