Results 121 to 130 of about 1,098 (225)

Cuts and contours

Journal of High Energy Physics
The traditional formulation of string amplitudes via worldsheet integrals provides a parametrization of the moduli space that fails to expose the complete singularity structure of the amplitudes.
Carolina Figueiredo, Marcos Skowronek
doaj   +1 more source

Toroidal compactification of closed bosonic strings [PDF]

, 1986
The boundary conditions of a free closed bosonic string propagating in a space where the compactified dimensions are toroidal limit the lattices defining the tori to be self dual, just as is required by modular invariance of the one-loop dual amplitudes.
Slansky, R.
core  

On off-shell bosonic string amplitudes

, 1998
We give a simple prescription for computing, in the framework of the bosonic string theory, off-shell one-loop amplitudes with any number of external massless particles, for both the open and closed strings. We discuss their properties and, in particular,
PEZZELLA F., Pettorino, R, MAROTTA R., CAPPIELLO, LUIGI, PETTORINO, ROBERTO, Cappiello, L, Pezzella, F, Marotta, R   +7 more
core   +1 more source

Generalized 2-split for higher-derivative YM and GR amplitudes at tree-level

Journal of High Energy Physics
We study the generalized 2-split of higher-derivative amplitudes, including Yang-Mills (YM) and Gravity (GR) amplitudes with special insertions of higher-derivative vertices, by expanding them into YM ⨁ BAS, GR ⨁ YM, and GR ⨁ YM ⨁ BAS amplitude ...
Liang Zhang, Kang Zhou
doaj   +1 more source

Relations between closed string amplitudes and mixed string amplitudes at tree-level

Journal of High Energy Physics
This paper investigates the relationships between closed and mixed string amplitudes at the tree level in string theory. Through the analytic continuation of complex variables, we establish a factorization of closed string amplitudes into those involving
Aphiwat Yuenyong, Pongwit Srisangyingcharoen   +1 more
doaj   +1 more source

Cosmic necklaces in string theory and field theory

, 2010
PhDIn this thesis we investigate astrophysical phenomena which arise in models with compact extra dimensions, focussing on the cosmological consequences of strings which wrap cycles in the internal space. Embedding our strings in the Klebanov-Strassler
Lake, Matthew James
core  

One-loop phenomenology in brane models [PDF]

, 2005
Particular examples of one-loop string effects are explored in the context of brane-based realizations of the Standard Model. We firstly examine the consequences of a phenomenon known as Kinetic Mixing, which couples hidden U(1) gauge factors to visible ...
Schofield, Ben
core  

Thermodynamic potential for compactified bosonic strings

, 1987
We discuss the inclusion of chemical potentials of the Kaluza-Klein charges in the partition function of the bosonic string with a compactified dimension on a circle. The construction of the thermodynamic potential is achieved by the path integral method
Shiraishi, K, K. Shiraishi
core   +1 more source

Aether, dark energy and string compactifications. [PDF]

Philos Trans A Math Phys Eng Sci, 2022
Townsend PK.
europepmc   +1 more source

Celestial holography from chiral strings

Journal of High Energy Physics
In this paper, we studied the relationship between celestial holography and chiral strings. Chiral strings differ from the usual string theory by a change of boundary conditions on the string propagators.
Hare Krishna, Yu-Ping Wang
doaj   +1 more source