Results 91 to 100 of about 129,145 (261)

Tensionless strings in a Kalb-Ramond background [PDF]

Journal of High Energy Physics
We investigate tensionless (or null) bosonic string theory with a Kalb-Ramond background turned on. In analogy with the tensile case, we find that the Kalb-Ramond field has a non-trivial effect on the spectrum only when the theory is compactified on an ...
Aritra Banerjee, Ritankar Chatterjee, P. Pandit   +2 more
semanticscholar   +1 more source

Pseudoscalar Field as a Possible Candidate for Phantom Field

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
We demonstrate the existence of a single pseudoscalar (PS) field in the mathematically backed and parity‐preserving modifications of the standard Stückelberg formalism (SSF) in the context of the Lagrangian formulation of the (i) two (1 + 1)‐dimensional (2D) massive Abelian 1‐form gauge theory, (ii) three (2 + 1)‐dimensional (3D) massive Abelian 2‐form
E. Harikumar, R. P. Malik, Burak Bilki
wiley   +1 more source

The fate of (phantom) dark energy universe with string curvature corrections

, 2005
We study the evolution of (phantom) dark energy universe by taking into account the higher-order string corrections to Einstein-Hilbert action with a fixed dilaton.
Aguirregabiria, Alam, Alexeev, Alexey Toporensky, Alexeyev, Andrianov, Antoniadis, Aref'eva, Aref'eva, Avelino, Babichev, Babichev, Bauer, Bento, Bento, Bouhmadi-Lopez, Boulware, Brevik, Brito, Brustein, Calcagni, Calcagni, Caldwell, Caldwell, Carroll, Carroll, Cartier, Chimento, Chimento, Copeland, Corasaniti, Csaki, Dabrowski, Elizalde, Feinstein, Feng, Feng, Foffa, Gonzalez-Diaz, Gonzalez-Diaz, Gonzalez-Diaz, Gonzalez-Diaz, Gumjudpai, Guo, Hannestad, Hao, Hao, Hossain, Hoyle, Hoyle, Hoyle, Hoyle, Hoyle, Izquierdo, Johri, Kanti, Kawai, Kim, Lima, Lu, Lu, M. Sami, Maeda, Maeda, McInnes, McInnes, McInnes, Melchiorri, Meng, Narlikar, Neupane, Nojiri, Nojiri, Nojiri, Nojiri, Nojiri, Nojiri, Nojiri, Nojiri, Nojiri, Nojiri, Ohta, Onemli, Perivolaropoulos, Peter V. Tretjakov, Piao, Piazza, Pomazanov, Rizos, Sahni, Sahni, Sami, Shinji Tsujikawa, Singh, Starobinsky, Stefancic, Stefancic, Toporensky, Torii, Torres, Tsujikawa, Tsujikawa, Tsujikawa, Tsujikawa, Vikman, Wei, Weller, Wu, Xia   +108 more
core   +1 more source

A Space-Time Orbifold: A Toy Model for a Cosmological Singularity [PDF]

, 2002
We explore bosonic strings and Type II superstrings in the simplest time dependent backgrounds, namely orbifolds of Minkowski space by time reversal and some spatial reflections. We show that there are no negative norm physical excitations.
A. Strominger, A.E. Lawrence, Asad Naqvi, C. Kounnas, C.M. Hull, C.R. Nappi, D. Ghoshal, E. Witten, E.J. Martinec, Esko Keski-Vakkuri, G.T. Horowitz, G.T. Horowitz, G.T. Horowitz, J. Khoury, J. Khoury, J. Maldacena, J. Maldacena, L.J. Dixon, L.J. Dixon, L.J. Dixon, M. Asano, M. Banados, M. Natsuume, M. Spradlin, N. Kaloper, P. Ginsparg, R. Bousso, R. Bousso, S. F. Hassan, S. Hamidi, S. Hemming, S. Perlmutter, T. Banks, T. Eguchi, V. Balasubramanian, V. Balasubramanian, Vijay Balasubramanian   +36 more
core   +2 more sources

T‐Symmetry in String Geometry Theory

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
String geometry theory is one of the candidates of nonperturbative formulation of string theory. In this paper, we have shown that dimensionally reduced string geometry theories have what we call T‐symmetry. In the case of the dimensional reduction in space‐like directions, the T‐symmetry transformation gives the T‐dual transformation between the Type ...
Matsuo Sato, Taiki Tohshima, Michele Arzano   +2 more
wiley   +1 more source

Torus bundles, automorphisms and T-duality

Journal of High Energy Physics, 2021
We reconsider some older constructions of T-duality, based on automorphisms of the worldsheet operator algebra, in a modern context. It has been long known that at special points in the moduli space of torus compactifications, the target space gauge ...
H. Mahmood, R. A. Reid-Edwards
doaj   +1 more source

Dirichlet Boundary Conditions in Generalized Liouville Theory toward a QCD String

, 2000
We consider bosonic noncritical strings as QCD strings and we present a basic strategy to construct them in the context of Liouville theory. We show that Dirichlet boundary conditions play important roles in generalized Liouville theory.
Nakamura, Shin
core   +2 more sources

Strings Near a Rindler Or Black Hole Horizon [PDF]

, 1994
Orbifold techniques are used to study bosonic, type II and heterotic strings in Rindler space at integer multiples N of the Rindler temperature, and near a black hole horizon at integer multiples of the Hawking temperature, extending earlier results of ...
Andrew Strominger, B. Sathiapalan, C. Callan, C. Vafa, D. J. Gross, David A. Lowe, H. J. de Vega, H. J. de Vega, I. Klebanov, J. A. Bagger, J. J. Atick, J. L. F. Barbon, L. Alvarez Gaume, L. Dixon, L. Dixon, L. Susskind, M. Bañados, N. Sanchez, N. Seiberg, R. Hagedorn, V. P. Nair, Ya. I. Kogan   +21 more
core   +2 more sources

Modified 3D Massive Abelian 2‐Form Theory With a Single Pseudoscalar Field as a Phantom Field: BRST Approach

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
We obtain the off‐shell nilpotent Becchi–Rouet–Stora–Tyutin (BRST) and anti‐BRST symmetry transformations (corresponding to the infinitesimal classical gauge symmetry transformations) for the modified massive three (2 + 1)‐dimensional (3D) Abelian two‐form gauge theory with a single pseudoscalar field. The latter field (having the negative kinetic term
S. K. Panja, E. Harikumar, R. P. Malik, Xiao Yan Chew   +3 more
wiley   +1 more source

ON OFF-SHELL BOSONIC STRING AMPLITUDES [PDF]

Modern Physics Letters A, 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, for the two-string one-loop amplitudes, we show their transversality.
CAPPIELLO, LUIGI, MAROTTA R., PETTORINO, ROBERTO, PEZZELLA F.   +3 more
openaire   +5 more sources