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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

On the exactness of soft theorems

Texto completo
Autor(es):
Guerrier, Andrea L. [1, 2, 3] ; Huang, Yu-tin [4, 5] ; Li, Zhizhong [4] ; Wen, Congkao [6, 7]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] IFT UNESP, ICTP South Amer Inst Fundamental Res, Rua Dr Bento Teobaldo Ferraz 271, BR-01440070 Sao Paulo, SP - Brazil
[2] Chulalongkorn Univ, Fac Sci, Dept Phys, 254 Phayathai Rd, Bangkok 10330 - Thailand
[3] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Via Ric Sci, I-00133 Rome - Italy
[4] Natl Taiwan Univ, Dept Phys & Astron, 1 Sect 4 Roosevelt Rd, Taipei 10617 - Taiwan
[5] Natl Tsing Hua Univ, Natl Ctr Theoret Sci, Phys Div, 101, Sect 2, Kuang Fu Rd, Hsinchu - Taiwan
[6] CALTECH, Walter Burke Inst Theoret Phys, 1200 E Calif Blvd, Pasadena, CA 91125 - USA
[7] Univ Calif Los Angeles, Mani L Bhaumik Inst Theoret Phys, Dept Phys & Astron, 475 Portola Plaza, Los Angeles, CA 90095 - USA
Número total de Afiliações: 7
Tipo de documento: Artigo Científico
Fonte: Journal of High Energy Physics; n. 12 DEC 12 2017.
Citações Web of Science: 6
Resumo

Soft behaviours of S-matrix for massless theories reflect the underlying symmetry principle that enforces its masslessness. As an expansion in soft momenta, sub-leading soft theorems can arise either due to (I) unique structure of the fundamental vertex or (II) presence of enhanced broken-symmetries. While the former is expected to be modified by infrared or ultraviolet divergences, the latter should remain exact to all orders in perturbation theory. Using current algebra, we clarify such distinction for spontaneously broken (super) Poincare and (super) conformal symmetry. We compute the UV divergences of DBI, conformal DBI, and A-V theory to verify the exactness of type (II) soft theorems, while type (I) are shown to be broken and the soft-modifying higher-dimensional operators are identified. As further evidence for the exactness of type (II) soft theorems, we consider the alpha' expansion of both super and bosonic open strings amplitudes, and verify the validity of the translation symmetry breaking soft-theorems up to Omicron(alpha'(6)). Thus the massless S-matrix of string theory ``knows{''} about the presence of D-branes. (AU)

Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
Beneficiário:Nathan Jacob Berkovits
Linha de fomento: Auxílio à Pesquisa - Temático