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astro-ph2000★ 15 cited

Testing Hydrodynamic Models of LMC X-4 with UV and X-ray Spectra

B. Boroson, T. Kallman, J. M. Blondin +1

We compare the predictions of hydrodynamic models of the LMC X-4 X-ray binary system with observations of UV P Cygni lines with the GHRS and STIS spectrographs on the Hubble Space…

math.QA2000★ 4 cited

Sh-Lie algebras Induced by Gauge Transformations

Ron Fulp, Tom Lada, Jim Stasheff

The physics of ``particles of spin '' leads to representations of a Lie algebra of gauge parameters on a vector space of fields. Attempts to develop an analogous th…

cond-mat.stat-mech2000★ 59 cited

Hysteresis and the dynamic phase transition in thin ferromagnetic films

Hyunbum Jang, Malcolm J Grimson

Hysteresis and the non-equilibrium dynamic phase transition in thin magnetic films subject to an oscillatory external field have been studied by Monte Carlo simulation. The model u…

astro-ph2000

Detecting X-ray Synchrotron Emission in Supernova Remnants: Implications for Abundances and Cosmic Rays

Kristy K. Dyer, Stephen P. Reynolds, Kazik J. Borkowski +1

The 10^51 ergs released in a supernova have far reaching consequences in the galaxy, determining elemental abundances, accelerating cosmic rays, and affecting the makeup of the int…

hep-ph2000

Higher-Fock States and the Covariance of the Light-Front Quark Model

Ho-Meoyng Choi, Chueng-Ryong Ji

The light-front quark model has been successful in describing various meson properties. We apply the model to the meson weak decays and discuss the covariance of the model. We find…

astro-ph2000★ 23 cited

Hydrodynamic Models of Line-Driven Accretion Disk Winds II: Adiabatic Winds from Nonisothermal Disks

Nicolas Antonio Pereyra, Timothy R. Kallman, John M. Blondin

We present here numerical hydrodynamic simulations of line-driven accretion disk winds in cataclysmic variable systems. We calculate wind mass-loss rate, terminal velocities, and l…

math.QA2000

Algebraic structures behind Hilbert schemes and wreath products

Weiqiang Wang

In this paper we review various strikingly parallel algebraic structures behind Hilbert schemes of points on surfaces and certain finite groups called the wreath products. We expla…

astro-ph2000★ 83 cited

Separating Thermal and Nonthermal X-Rays in Supernova Remnants I: Total Fits to SN 1006 AD

K. K. Dyer, S. P. Reynolds, K. J. Borkowski +2

The remnant of SN 1006 has an X-ray spectrum dominated by nonthermal emission, and pre-ASCA observations were well described by a synchrotron calculation with electron energies lim…

astro-ph2000★ 56 cited

Dynamics of Fe-Ni Bubbles in Young Supernova Remnants

J. M. Blondin, K. J. Borkowski, S. P. Reynolds

Observations of core-collapse supernovae (SNe) have revealed the presence of extensive mixing of radioactive material in SN ejecta. The mixing of radioactive material, mostly fresh…

quant-ph2000

Computational leakage: Grover's algorithm with imperfections

Pil Hun Song, Ilki Kim

We study the effects of dissipation or leakage on the time evolution of Grover's algorithm for a quantum computer. We introduce an effective two-level model with dissipation and ra…

gr-qc2000★ 30 cited

Action and Energy of the Gravitational Field

J. D. Brown, S. R. Lau, J. W. York

We present a detailed examination of the variational principle for metric general relativity as applied to a ``quasilocal'' spacetime region $\M$ (that is, a region that is both sp…

astro-ph2000

Kinematics of 1200 km/s Jets in He 3-1475

K. J. Borkowski, J. P. Harrington

Spectroscopic observations of a proto-planetary nebula He 3-1475 with the Space Telescope Imaging Spectrograph (STIS) reveal the kinematics of its high (1200 km/s) velocity jets. T…

math.AG2000

Vertex algebras and the cohomology ring structure of Hilbert schemes of points on surfaces

Wei-ping Li, Zhenbo Qin, Weiqiang Wang

Using vertex algebra techniques, we determine a set of generators for the cohomology ring of the Hilbert schemes of points on an arbitrary smooth projective surface over the field…

hep-ph2000★ 41 cited

New effective treatment of the light-front nonvalence contribution in timelike exclusive processes

Chueng-Ryong Ji, Ho-Meoyng Choi

We discuss a necessary nonvalence contribution in timelike exclusive processes. Following a Schwinger-Dyson type of approach, we relate the nonvalence contribution to an ordinary l…

hep-ph2000★ 8 cited

Flow equations for quark-gluon interactions in light-front QCD

Elena Gubankova, Chueng-Ryong Ji, Stephen R. Cotanch

The flow-equation method of continuous unitary transformations is used to eliminate the minimal quark-gluon interaction in the light-front quantized QCD Hamiltonian. The coupled di…

hep-ph2000★ 8 cited

B-Physics Phenomenology with Emphasis on the Light-Cone

Chueng-Ryong Ji, Ho-Meoyng Choi

Theoretical overviews on the B-physics are presented with an emphasis on the light-cone degrees of freedom. Our new treatment of the embedded states seems to give an encouraging re…

math.RT2000★ 5 cited

Remarks on the Schur-Howe-Sergeev Duality

Shun-Jen Cheng, Weiqiang Wang

We establish a new Howe duality between a pair of two queer Lie superalgebras (q(m),q(n)). This gives a representation theoretic interpretation of a well-known combinatorial identi…

math.RT2000★ 7 cited

Howe Duality for Lie Superalgebras

Shun-Jen Cheng, Weiqiang Wang

We study a dual pair of general linear Lie superalgebras in the sense of R. Howe. We give an explicit multiplicity-free decomposition of a symmetric and skew-symmetric algebra (in…

astro-ph2000★ 35 cited

HST Spectroscopy of Spot 1 on the Circumstellar Ring of SN 1987A

Eli Michael, Richard McCray, C. S. J. Pun +15

We present ultraviolet and optical spectra of the first bright spot (PA = 29 degrees) on Supernova 1987A's equatorial circumstellar ring taken with the Space Telescope Imaging Spec…

astro-ph2000★ 444 cited

Supernova Remnants in the Sedov Expansion Phase: Thermal X-Ray Emission

K. J. Borkowski, W. J. Lyerly, S. P. Reynolds

Improved calculations of X-ray spectra for supernova remnants (SNRs) in the Sedov-Taylor phase are reported, which for the first time include reliable atomic data for Fe L-shell li…

hep-ph2000★ 44 cited

Many-Body Coulomb Gauge Exotic and Charmed Hybrids

Felipe J. Llanes-Estrada, Stephen R. Cotanch

Utilizing a QCD Coulomb gauge Hamiltonian with linear confinement specified by lattice, we report a relativistic many-body calculation for the light exotic and charmed hybrid meson…

hep-ph2000★ 43 cited

QCD Glueball Regge Trajectories and the Pomeron

Felipe J. Llanes-Estrada, Stephen R. Cotanch, Pedro J. de A. Bicudo +2

We report a glueball Regge trajectory emerging from diagonalizing a confining Coulomb gauge Hamiltonian for constituent gluons. Using a BCS vacuum ansatz and gap equation, the dres…

hep-ph2000★ 77 cited

Regularizing the Divergent Structure of the Light-Front Currents

Bernard L. G. Bakker, Ho-Meoyng Choi, Chueng-Ryong Ji

The divergences appearing in the 3+1 dimensional fermion-loop calculations are often regulated by smearing the vertices in a covariant manner. Performing a parallel light-front cal…

astro-ph2000★ 144 cited

Thermal X-ray Emission and Cosmic Ray Production in Young Supernova Remnants

A. Decourchelle, D. C. Ellison, J. Ballet

We have developed a simple model to investigate the modifications of the hydrodynamics and non-equilibrium ionization X-ray emission in young supernova remnants due to nonlinear pa…