TY  - EJOUR
AU  - Leite Antunes, António
AU  - Costa, Miguel
AU  - Pereira, José
TI  - Exploring Inelasticity in the S-Matrix Bootstrap
IS  - DESY-23-015
M1  - PUBDB-2023-00555
M1  - DESY-23-015
M1  - arXiv:2301.13219
PY  - 2023
N1  - 8 pages, 14 figures
AB  - The modern S-Matrix Bootstrap provides non-perturbative bounds on low-energy aspects of scattering amplitudes, leveraging the constraints of unitarity, analyticity and crossing. Typically, the solutions saturating such bounds also saturate the unitarity constraint as much as possible, meaning that they are almost exclusively elastic. This is expected to be unphysical in d > 2 because of Aks' theorem. We explore this issue by adding inelasticity as an additional input, both using a primal approach in general dimensions which extends the usual ansatz, and establishing a dual formulation in the 2d case. We then measure the effects on the low-energy observables where we observe stronger bounds than in the standard setup.
KW  - unitarity, constraint (INSPIRE)
KW  - bootstrap (INSPIRE)
KW  - S-matrix (INSPIRE)
KW  - duality (INSPIRE)
KW  - scattering amplitude (INSPIRE)
KW  - analytic properties (INSPIRE)
KW  - nonperturbative (INSPIRE)
KW  - crossing (INSPIRE)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2023-00555
UR  - https://bib-pubdb1.desy.de/record/517594
ER  -