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http://acervodigital.unesp.br/handle/11449/113044
- Title:
- All-loop infrared-divergent behavior of most-subleading-color gauge-theory amplitudes
- Bowdoin Coll
- Universidade Estadual Paulista (UNESP)
- Brandeis Univ
- 1029-8479
- NSF
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- DOE
- NSFPHY10-67961
- CNPq: 301219/2010-9
- DOEDE-FG02-92ER40706
- The infrared singularities of gravitational amplitudes are one-loop exact, in that higher-loop divergences are characterized by the exponential of the one-loop divergence. We show that the contributions to SU(N) gauge-theory amplitudes that are most-subleading in the 1/N expansion are also one-loop exact, provided that the dipole conjecture holds. Possible corrections to the dipole conjecture, beginning at three loops, could violate one-loop-exactness, though would still maintain the absence of collinear divergences. We also demonstrate a relation between L-loop four-point N = 8 supergravity and most-subleading-color N = 4 SYM amplitudes that holds for the two leading IR divergences, O(1/epsilon(L)) and O(1/epsilon(L-1)), but breaks down at O(1/epsilon(L-2)).
- 1-Apr-2013
- Journal Of High Energy Physics. New York: Springer, n. 4, 23 p., 2013.
- 23
- Springer
- Supersymmetric gauge theory
- Scattering Amplitudes
- Models of Quantum Gravity
- 1/N Expansion
- http://dx.doi.org/10.1007/JHEP04(2013)114
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/113044
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