36,210 research outputs found
Azimuthal Asymmetric Distribution of Hadrons Inside a Jet at Hadron Collider
We study the azimuthal asymmetric distribution of hadrons inside a high
energy jet in the single transverse polarized proton proton scattering, coming
from the Collins effect multiplied by the quark transversity distribution. We
argue that the Collins function in this process is the same as that in the
semi-inclusive deep inelastic scattering. The experimental study of this
process will provide us important information on the quark transversity
distribution and test the universality of the fragmentation functions.Comment: 10 pages, 4 figure
Luminous hot accretion disks
We find a new two-temperature hot branch of equilibrium solutions for
stationary accretion disks around black holes. In units of Eddington accretion
rate defined as , the accretion rates to which these
solutions correspond are within the range \dot{m}_1 \la \dot{m} \la 1, here
is the critical rate of advecti\dot{m}_1 \la \dot{m} \la \dot{m}_2\dot{m}_2 \sim 5
\dot{m}_1 < 1\dot{m}_2 \la \dot{m}\la 1r_{\rm tr} \sim$ several -- tens of
Schwarzschild radii or larger depending on the accretion rate and the outer
boundary condition) and the disk will collapse onto the equatorial plane and
form an optically thick cold annulus. Compared to ADAF, these hot solutions are
much more luminous because of the high accretion rate and efficiency,
therefore, we name them luminous hot accretion disks.Comment: 12 pages, 6 figures, uses mn.sty, the final version accepted by
MNRAS, discussion extended to emphasize the difference between ADAF and my
mode
Influence of the additional second neighbor hopping on the spin response in the t-J model
The influence of the additional second neighbor hopping t' on the spin
response of the t-J model in the underdoped and optimally doped regimes is
studied within the fermion-spin theory. Although the additional second neighbor
hopping t' is systematically accompanied with the reduction of the dynamical
spin structure factor and susceptibility, the qualitative behavior of the
dynamical spin structure factor and susceptibility of the t-t'-J model is the
same as in the case of t-J model. The integrated dynamical spin structure
factor spectrum is almost t' independent, and the integrated dynamical spin
susceptibility still shows the particularly universal behavior as
.Comment: 12 pages, Latex, Four figures are included, final published version
[accepted for publication in Phys. Rev. B (July 1 issue)
Pseudogap effects on the c-axis charge dynamics in copper oxide materials
The c-axis charge dynamics of copper oxide materials in the underdoped and
optimally doped regimes has been studied by considering the incoherent
interlayer hopping. It is shown that the c-axis charge dynamics for the chain
copper oxide materials is mainly governed by the scattering from the in-plane
fluctuation, and the c-axis charge dynamics for the no-chain copper oxide
materials is dominated by the scattering from the in-plane fluctuation
incorporating with the interlayer disorder, which would be suppressed when the
holon pseudogap opens at low temperatures and lower doping levels, leading to
the crossovers to the semiconducting-like range in the c-axis resistivity and
the temperature linear to the nonlinear range in the in-plane resistivity.Comment: 21 pages, Revtex, Six figures are include
Maximal function and Multiplier Theorem for Weighted Space on the Unit Sphere
For a family of weight functions invariant under a finite reflection group,
the boundedness of a maximal function on the unit sphere is established and
used to prove a multiplier theorem for the orthogonal expansions with respect
to the weight function on the unit sphere. Similar results are also established
for the weighted space on the unit ball and on the standard simplex.Comment: 24 pages, to appear in J. Funct. Analysi
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