Ward Identities for Superamplitudes
Fuente:
arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866911877762646016 |
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| author | Kallosh, Renata |
| author_facet | Kallosh, Renata |
| contents | We introduce Ward identities for superamplitudes in D-dimensional N-extended supergravities. These identities help to clarify the relation between linearized superinvariants and superamplitudes. The solutions of these Ward identities for an $n$-partice superamplitude take a simple universal form for half-BPS and non-BPS amplitudes. These solutions involve arbitrary functions of spinor helicity and Grassmann variables for each of the $n$ superparticles. The dimension of these functions at a given loop order is exactly the same as the dimension of the relevant superspace Lagrangians depending on half-BPS or non-BPS superfields, given by $(D-2) L +2- N$ or $(D-2) L +2- 2 N$, respectively. This explains why soft limits predictions from superamplitudes and from superspace linearized superinvariants agree. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_03453 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ward Identities for Superamplitudes Kallosh, Renata High Energy Physics - Theory We introduce Ward identities for superamplitudes in D-dimensional N-extended supergravities. These identities help to clarify the relation between linearized superinvariants and superamplitudes. The solutions of these Ward identities for an $n$-partice superamplitude take a simple universal form for half-BPS and non-BPS amplitudes. These solutions involve arbitrary functions of spinor helicity and Grassmann variables for each of the $n$ superparticles. The dimension of these functions at a given loop order is exactly the same as the dimension of the relevant superspace Lagrangians depending on half-BPS or non-BPS superfields, given by $(D-2) L +2- N$ or $(D-2) L +2- 2 N$, respectively. This explains why soft limits predictions from superamplitudes and from superspace linearized superinvariants agree. |
| title | Ward Identities for Superamplitudes |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2402.03453 |