Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Sciuto, A."'
Autor:
Sam Playle, Stefano Sciuto
Publikováno v:
Physics Letters B, Vol 766, Iss C, Pp 317-324 (2017)
A parametrization of (super) moduli space near the corners corresponding to bosonic or Neveu–Schwarz open string degenerations is introduced for worldsheets of arbitrary topology. With this parametrization, Feynman graph polynomials arise as the α
Externí odkaz:
https://doaj.org/article/3436e1cfff014a6785d22314495558df
Autor:
Playle, Sam, Sciuto, Stefano
Publikováno v:
In Physics Letters B 10 March 2017 766:317-324
Publikováno v:
Scopus-Elsevier
We develop an operator formalism to compute scattering amplitudes of arbitrary bosonic string states in the background of many D-branes. Specifically, we construct a suitable boundary state which we use to saturate the multi-Reggeon vertex in order t
Publikováno v:
Physics Letters B. 369:313-324
We give a realization of quantum affine Lie algebra Uq(AN−1) in terms of anyons defined on a two-dimensional lattice, the deformation parameter q being related to the statistical parameter ν of the anyons by q = eiπν. In the limit of the deforma
Publikováno v:
Physics Letters B. 354:389-395
We study the relationship among the XXZ Heisenberg model and three models obtained from it by various transformations. In particular, we emphasize the role of a non trivial central element $t^Z$ in the underlying algebra and its relationship with the
Publikováno v:
Physics Letters B. 245:453-464
We give the extension of the free field representation of SU (2) k WZNW model conformal blocks to an arbitrary Riemann surface. In particular, we avoid the problems associated with the vertex corresponding to the dual of a given representation - name
Autor:
E. Napolitano, Stefano Sciuto
Publikováno v:
Physics Letters B. 104:285-288
A supersymmetric σ-model classically equivalent to the supersymmetric sine-Gordon equation is equation is explicitly built: contrarily to naive expectations, it turns out to be not an O(3) but a SU(2/1) supersymmetric σ-model, endowed with some ext
Publikováno v:
Physics Letters B. 206:643-649
We construct the N -string, g -loop vertex V N , g for the orbital degrees of freedom of the bosonic string in terms of the first abelian differentials, the period matrix and the prime form. We also build the | g > vacuum recently discussed by many p
Publikováno v:
Physics Letters B. 118:402-406
We propose a method to evaluate numerically and in some cases analytically the two-loop contributions to physical quantities without computing Feynman graphs. Such contributions are negligible for the SU(2) Wilson action, which shows a precocious sca
Publikováno v:
Physics Letters B. 211:301-307
We construct an N -string, g -loop vertex for the fermionic string, that is the supersymmetric extension of the analogous bosonic vertex. As a byproduct we obtain also the g -vacuum for the fermionic string.