Results 221 to 230 of about 130,847 (255)

String Theory: Bosonic String

2021
What we have achieved so far is not entirely satisfactory: Supersymmetry (more precisely, the broader framework of supergravity) offers a partial solution to the weak-scale hierarchy problem. Partial refers to the fact that SUSY partners have not been discovered (yet?) and hence some fine-tuning is probably needed after all.
openaire   +1 more source

Closed strings from open bosonic strings

Physical Review D, 1989
We show that closed strings can be incorporated into a bosonic open-string theory by a suitable enlargement of the open-string Fock space. We present an explicit construction of the states in this space in terms of open-string oscillators. The couplings between closed- and open-string states are those deduced from factorization over the closed-string ...
openaire   +2 more sources

Improved model of bosonic string

Physical Review D, 1987
A model of the bosonic string is presented in which 16 additional twisted scalar fields defined on the world sheet allow the tachyonic mass to vanish and scalar fields defined on the world sheet allow the tachyonic mass to vanish and the critical dimension to be lowered to d=10.
Balbinot R., Barletta A., Venturi G.
openaire   +3 more sources

Compactification of closed bosonic strings

Physical Review Letters, 1986
The boundary conditions of the first-quantized compactified closed bosonic string constrain the eigenvalues of the zero-mode operators. Requiring that internal symmetries result from compactification, we show that the simplest boundary conditions imply that the ``left'' and ``right'' lattices must be self-dual at the first-quantized level. The one-loop
, Raby, , Slansky
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The Bosonic String

1990
The starting point of dual string theories was the scattering amplitude proposed by Veneziano in 1968 for four neutral scalar particles. The (s,t) term of such an amplitude is given by the well-known Veneziano formula (1): $${\text{A(s,t) = }}\frac{{\Gamma ( - {\alpha _{\text{s}}}){\text{ }}{\mkern 1mu} \Gamma ( - {\alpha _{\text{t}}})}}{{\Gamma ( -
openaire   +1 more source

Non-relativistic quantum strings from gauged WZW models

Journal of High Energy Physics
We construct non-relativistic quantum strings from gauged Wess-Zumino-Witten (WZW) models. We depart from the fact that Lie groups with a bi-invariant galilean structure can be seen as the quotient by a null central subgroup of a generalised Nappi-Witten
J. Figueroa-O’Farrill, Girish S. Vishwa   +1 more
semanticscholar   +1 more source

Scattering of D0-branes and Strings

Journal of High Energy Physics
It has been known for about thirty years that a scattering amplitude involving D0-branes and closed strings suffers from infrared divergences beyond tree level.
Ashoke Sen, Bogdan Stefański
semanticscholar   +1 more source

BOSONIC STRING WITH TOPOLOGICAL TERM

Modern Physics Letters A, 1991
It is shown that in D = 3 space-time dimensions there exist a topological term for the bosonic strings. The corresponding constraints satisfy the same Virasoro algebra as the ordinary bosonic strings. These results are generalized for an arbitrary dimensional space-time if we have SO (1, 2) ⊗ O (D − 3) or SO (3) ⊗ O (1, D − 4) symmetry instead of SO ...
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The Quantized Bosonic String

2012
In this chapter the quantization of the bosonic string is discussed. This leads to the notion of a critical dimension (d= 26) in which the bosonic string can consistently propagate. Its discovery was of great importance for the further development of string theory.
Ralph Blumenhagen, Dieter Lüst, Stefan Theisen   +2 more
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Bosonic Strings, Background Independence and Analytic Solutions

String Fields, Higher Spins and Number Theory, 2018

semanticscholar   +1 more source