Locality and Analyticity of the Crossing Symmetric Dispersion Relation

Autor:	Chowdhury, Debapriyo, Haldar, Parthiv, Zahed, Ahmadullah
Rok vydání:	2022
Předmět:	High Energy Physics - Theory High Energy Physics - Phenomenology Mathematical Physics
Druh dokumentu:	Working Paper
DOI:	10.1007/JHEP10(2022)180
Popis:	This paper discusses the locality and analyticity of the crossing symmetric dispersion relation (CSDR). Imposing locality constraints on the CSDR gives rise to a local and fully crossing symmetric expansion of scattering amplitudes, dubbed as Feynman block expansion. A general formula is provided for the contact terms that emerge from the expansion. The analyticity domain of the expansion is also derived analogously to the Lehmann-Martin ellipse. Our observation of type-II super-string tree amplitude suggests that the Feynman block expansion has a bigger analyticity domain and better convergence. Comment: v2: 31 pages, 7 figures, the version to appear in JHEP
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2205.13762 Zobrazit plný text záznamu View this record from Arxiv