37 research outputs found
An analytic study towards instabilities of the glasma
Strong longitudinal color flux fields will be created in the initial stage of
high-energy nuclear collisions. We investigate analytically time evolution of
such boost-invariant color fields from Abelian-like initial conditions, and
next examine stability of the boost-invariant configurations against rapidity
dependent fluctuations. We find that the magnetic background field has an
instability induced by the lowest Landau level whose amplitude grows
exponentially. For the electric background field there is no apparent
instability although pair creations due to the Schwinger mechanism should be
involved.Comment: 4p, 3figs; poster contribution to QM200
Forward particle productions at RHIC and the LHC from CGC within local rcBK evolution
In order to describe forward hadron productions in high-energy nuclear
collisions, we propose a Monte-Carlo implementation of
Dumitru-Hayashigaki-Jalilian-Marian formula with the unintegrated gluon
distribution obtained numerically from the running-coupling BK equation. We
discuss influence of initial conditions for the BK equation by comparing a
model constrained by global fit of small-x HERA data and a newly proposed one
from the running coupling MV model.Comment: Talk given at conference Quark Matter 2011, 4 page
Critical Properties in Photoemmision Spectra for One Dimensional Orbitally Degenerate Mott Insulator
Critical properties in photoemission spectra for the one-dimensional Mott
insulator with orbital degeneracy are studied by exploiting the integrable {\it
t-J} model, which is a supersymmetric generalization of the SU() degenerate
spin model. We discuss the critical properties for the holon dispersion as well
as the spinon dispersions, by applying the conformal field theory analysis to
the exact finite-size energy spectrum. We study the effect of orbital-splitting
on the spectra by evaluating the momentum-dependent critical exponents.Comment: 8 pages, REVTeX, 2 figures(available upon request), accepted for
publication in JPSJ 68 (1999) No.
Dynamical Properties of One-Dimensional Multicomponent Quantum Liquids in Metallic Phase
We investigate low-energy dynamical properties of one-dimensional
multicomponent quantum liquids with the short-range interaction as well as the
-type long-range interaction. By calculating the single-particle spectrum
and the dynamical spin susceptibility by means of the bosonization method, we
discuss how the orbital degeneracy and the band splitting affect the dynamical
response functions. The effect of the long-range interaction is also addressed.
Although the long-range interaction suppresses charge fluctuations, it
effectively enhances spin fluctuations via the formation of the Wigner crystal.Comment: 17 pages, 8 figure
From Glasma to Quark Gluon Plasma in heavy ion collisions
When two sheets of Color Glass Condensate collide in a high energy heavy ion
collision, they form matter with very high energy densities called the Glasma.
We describe how this matter is formed, its remarkable properties and its
relevance for understanding thermalization of the Quark Gluon Plasma in heavy
ion collisions. Long range rapidity correlations contained in the near side
ridge measured in heavy ion collisions may allow one to directly infer the
properties of the Glasma.Comment: Plenary Topical Overview Talk, Quark Matter 2008; 10 pages 8 figure
Targeting EGFR and HER-2 with cetuximab- and trastuzumab-mediated immunotherapy in oesophageal squamous cell carcinoma
We previously reported that oesophageal squamous cell carcinoma (SCC) had a relatively high incidence of EGFR and HER-2 overexpression. Thus, anti-HER family targeting may become a promising approach to treat oesophageal SCC. In the present study, we investigated (a) the distribution of EGFR and HER-2 expression in oesophageal SCC (n=66) detected by immunohistochemistry and (b) cetuximab- and/or trastuzumab-mediated biological activity (antiproliferative effect by the MTT assay, apoptosis-inducing activity by the annexin V/propidium iodide assay, and antibody-dependent cellular cytotoxicity (ADCC) by the 51Cr-release assay) against oesophageal SCC cell lines with various levels of EGFR and HER-2. Twelve of the 66 patients (18%) showed both EGFR- and HER-2 expression. Out of both EGFR- and HER-2-positive cases, nine cases (75%) showed EGFR and HER-2 expression in individually distinct regions. Furthermore, the combination of cetuximab and trastuzumab could induce synergistic antiproliferative effects and additional ADCC activities against not all, but several oesophageal SCC cell lines with EGFR and HER-2 expression. The combination of cetuximab and trastuzumab may be useful in the treatment of oesophageal SCC with EGFR and HER-2 expression