4,737 research outputs found
Gauge Structure of Vacuum String Field Theory
We study the gauge structure of vacuum string field theory expanded around
the D-brane solution, namely, the gauge transformation and the transversality
condition of the massless vector fluctuation mode. We find that the gauge
transformation on massless vector field is induced as an anomaly; an infinity
multiplied by an infinitesimal factor. The infinity comes from the singularity
at the edge of the eigenvalue distribution of the Neumann matrix, while the
infinitesimal factor from the violation of the equation of motion of the
fluctuation modes due to the regularization for the infinity. However, the
transversality condition cannot be obtained even if we take into account the
anomaly contribution.Comment: 19 pages, LaTeX2
Slavnov-Taylor identity for nonequilibrium quark-gluon plasma
Within the closed-time-path formalism of nonequilibrium QCD, we derive a
Slavnov-Taylor (ST) identity for the gluon polarization tensor. The ST identity
takes the same form both in Coulomb and covariant gauges. Application to
quasi-uniform quark-gluon plasma (QGP) near equilibrium or nonequilibrium
quasistationary QGP is made.Comment: 10page
Rolling Tachyon Solution in Vacuum String Field Theory
We construct a time-dependent solution in vacuum string field theory and
investigate whether the solution can be regarded as a rolling tachyon solution.
First, compactifying one space direction on a circle of radius R, we construct
a space-dependent solution given as an infinite number of *-products of a
string field with center-of-mass momentum dependence of the form e^{-b p^2/4}.
Our time-dependent solution is obtained by an inverse Wick rotation of the
compactified space direction. We focus on one particular component field of the
solution, which takes the form of the partition function of a Coulomb system on
a circle with temperature R^2. Analyzing this component field both analytically
and numerically using Monte Carlo simulation, we find that the parameter b in
the solution must be set equal to zero for the solution to approach a finite
value in the large time limit x^0\to\infty. We also explore the possibility
that the self-dual radius R=\sqrt{\alpha'} is a phase transition point of our
Coulomb system.Comment: 39 pages, 17 figures, v3: references adde
The Perturbative Spectrum of the Dressed Sliver
We analyze the fluctuations of the dressed sliver solution found in a
previous paper, hep-th/0311198, in the operator formulation of Vacuum String
Field Theory. We derive the tachyon wave function and then analyze the higher
level fluctuations. We show that the dressing is responsible for implementing
the transversality condition on the massless vector. In order to consistently
deal with the singular mode we introduce a string midpoint regulator and
we show that it is possible to accommodate all the open string states among the
solutions to the linearized equations of motion. We finally show how the
dressing can give rise to the correct ratio between the energy density of the
dressed sliver and the brane tension computed via the three-tachyons-coupling.Comment: 52 pages, v2: comment added in sec. 5, v3: one appendix added,
comments added in introduction and conclusion, to appear on PR
Boundary states as exact solutions of (vacuum) closed string field theory
We show that the boundary states are idempotent B*B=B with respect to the
star product of HIKKO type closed string field theory. Variations around the
boundary state correctly reproduce the open string spectrum with the gauge
symmetry. We explicitly demonstrate it for the tachyonic and massless vector
modes. The idempotency relation may be regarded as the equation of motion of
closed string field theory at a possible vacuum.Comment: 30 pages, 2 figures, v3:regularization improve
Stable skyrmions from extra dimensions
We show that skyrmions arising from compact five dimensional models have
stable sizes. We numerically obtain the skyrmion configurations and calculate
their size and energy. Although their size strongly depends on the magnitude of
localized kinetic-terms, their energy is quite model-independent ranging
between 50-65 times F_pi^2/m_rho, where F_pi is the Goldstone decay constant
and m_rho the lowest Kaluza-Klein mass. These skyrmion configurations
interpolate between small 4D YM instantons and 4D skyrmions made of Goldstones
and a massive vector boson. Contrary to the original 4D skyrmion and previous
5D extensions, these configurations have sizes larger than the inverse of the
cut-off scale and therefore they are trustable within our effective 5D
approach. Such solitonic particles can have interesting phenomenological
consequences as they carry a conserved topological charge analogous to baryon
number.Comment: 20 pages, 3 figure
Naskah Surat Akta Jual Beli Tanah Sawah: Kepemilikan Tanah Pada Awal Abad Ke-20
Penelitian ini akan menguraikan salah satu naskah (manuscript) akta jual beli tanah sawah yang ditemukan di Desa Srengseng, Indramayu. Akta yang menjadi objek penelitian ini adalah yang paling tua, ditulis dengan menggunakan aksara Jawa, bahasa Jawa. Dilihat dari kandungan isinya, surat tersebut tergolong surat penting. Tujuan penelitian ini adalah untuk melacak kandungan isi surat sebagai representasi zamannya. Metode yang digunakan adalah filologi. Beberapa pihak yang tercatat dalam surat adalah nama penjual dan pembeli, juru tulis, kuwu, dan saksi-saksi, termasuk mengenai luas tanah dan lokasinya juga dijelaskan, sebagaimana surat jual beli tanah pada umumnya, baik yang dikenal pada awal abad ke-20 atau pada saat ini. Adapun kandungan isinya berupa keterangan bahwa Bapak Salinah membeli sebidang tanah sawah kepada seorang mantan kuwu, Bapak Kadam, pada tanggal 10 November 1915, seharga 32 rupiah. Surat tersebut menegaskan bukti sah kepemilikan atas sebidang tanah sawah pada awal abad ke-20.This study describes one of the manuscripts about the deed of sale and purchase of rice field that had been found in Srengseng Village, Indramayu. The deed that is finally used as the data is the oldest one. The chosen manuscript is written in Javanese scripts. Referring to its content, the letter is classified as an important letter. The purpose of this research is to investigate the content of the old deed. Furthermore, the method which is applied is philology. As a research of this research is there are some parties written in the old deed, namely seller`s and buyer`s name, a clerk`s name, village chief, and a couple of witnesses or more. Beside that, some modern deed elements such as the size of the area and the location, as commonly known nowadays, also exist. Regarding the story of the content, the manuscripts tells about Mr. Salinah who purchased a rice field from and ex village chief, named Mr. Kadam, at November 10th, 1915, for 32 Indonesian rupiah. Finally this deed manuscript can be regarded as an ownership legitimisation of a rice field in the early of 20th century
Chan-Paton factors and Higgsing from Vacuum String Field Theory
We give a description of open strings stretched between N parallel D-branes
in VSFT. We show how higgsing is generated as the branes are displaced: the
shift in the mass formula for on-shell states stretched between different
branes is due to a twist anomaly, a contribution localized at the midpoint.Comment: 20 pages, JHEP clas
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