Results 91 to 100 of about 138,935 (247)

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

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

A new approach to superstring

Journal of High Energy Physics
We show how starting with one-string space of states in BRST formalism one can construct a large class of physical quantities containing, in particular, scattering amplitudes for bosonic string and superstring.
A. Schwarz
doaj   +1 more source

Multiloop soft theorem for gravitons and dilatons in the bosonic string

Journal of High Energy Physics, 2019
We construct, in the closed bosonic string, the multiloop amplitude involving N tachyons and one massless particle with 26 − D compactified directions, and we show that at least for D > 4, the soft behaviors of the graviton and dilaton satisfy the same ...
Paolo Di Vecchia, Raffaele Marotta, Matin Mojaza   +2 more
doaj   +1 more source

Cosmic Rays from Cosmic Strings with Condensates

, 2009
We re-visit the production of cosmic rays by cusps on cosmic strings. If a scalar field (``Higgs'') has a linear interaction with the string world-sheet, such as would occur if there is a bosonic condensate on the string, cusps on string loops emit ...
A. Vilenkin, J. Abraham, Tanmay Vachaspati, V. S. Berezinsky   +3 more
core   +1 more source

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

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

Note on W3 Realizations of the Bosonic String

, 1994
In order to investigate to what extent string theories are different vacua of a general string theory (the ``universal string"), we discuss realizations of the bosonic string as particular background of certain types of $W$-strings.
Bais, Bastianelli, Bastianelli, Bastianelli, Bergshoeff, Berkovits, Berkovits, Berkovits, Bershadsky, Bershadsky, Figueroa-O'Farrill, Fiorenzo Bastianelli, Ishikawa, Khviengia, Krinovos, Kunitomo, Nobuyoshi Ohta, Ohta, Polyakov, Thielemans   +19 more
core   +2 more sources

Open String Renormalization Group Flow as a Field Theory

Fortschritte der Physik, Volume 72, Issue 11, November 2024.
Abstract This article shows that the integral flow‐lines of the RG‐flow of open string theory can be interpreted as the solitons of a Hořova–Lifshitz sigma‐model of open membranes. The authors argue that the effective background description of this model implies the g‐theorem of open string theory.
Julius Hristov
wiley   +1 more source

Bosonized string ghosts

Nuclear Physics B, 1987
Abstract A precise treatment of ghost bosonization is given in the operator framework without employing conformal field theory techniques. This is then applied to reformulate Virasoro BRS cohomology using bosonic coordinates but without a ghost number degree of freedom. Subsequent analysis reveals a rather elegant structure.
openaire   +1 more source