4,764 research outputs found
OL-053 Screening and identification of genes trans-regulated by HCV p7 protein with microarray assay
A precise determination of the top-quark pole mass
The Principle of Maximum Conformality (PMC) provides a systematic way to
eliminate the renormalization scheme and renormalization scale uncertainties
for high-energy processes. We have observed that by applying PMC scale-setting,
one obtains comprehensive and self-consistent pQCD predictions for the
top-quark pair total cross-section and the top-quark pair forward-backward
asymmetry in agreement with the measurements at the Tevatron and LHC. As a step
forward, in the present paper, we determine the top-quark pole mass via a
detailed comparison of the top-quark pair cross-section with the measurements
at the Tevatron and LHC. The results for the top-quark pole mass are
GeV for the Tevatron with TeV,
GeV and GeV for the LHC with TeV
and TeV, respectively. Those predictions agree with the average,
GeV, obtained from various collaborations via direct
measurements. The consistency of the pQCD predictions using the PMC with all of
the collider measurements at different energies provides an important
verification of QCD.Comment: 10 pages, 6 figures. Revised version to be published in Eur.Phys.J.
Photoproduction of the charged top-pions at the LHeC
The top triangle moose model, which can be seen as the deconstructed
version of the topcolor-assisted technicolor () model, predicts the
existence of the charged top-pions in low energy spectrum. In
the context of this model, we consider photoproduction of via
the subprocesses and at the large hadron-electron collider (), in which high
energy photon beams are generated by using the Compton backscatting method. We
find that, as long as the charged top-pions are not too heavy, they can be
abundantly produced via collision.Comment: 16 pages, 5 figure
Universal transport properties of three-dimensional topological insulator nanowires
We report theoretical calculations of electronic and transport properties mediated by topological helical states on the walls of three-dimensional topological insulator (TI) nanowires. A universal regime of quantized conductance and fluctuations is found that is induced by disorder. The average conductance of the disordered nanowire scales as a function of the number of transmission channels N in a universal form = independent of the system details. For instance, for Bi2Se3 nanowires cleaved along the x or y direction with the quintuple layers along the z direction =(5/12)N+1/2. The universal and quantized behavior is due to the topological physics happening on the walls of the nanowire under the influence of disorder. © 2014 American Physical Society.published_or_final_versio
Strong decays of heavy baryons in Bethe-Salpeter formalism
In this paper we study the properties of diquarks (composed of and/or
quarks) in the Bethe-Salpeter formalism under the covariant instantaneous
approximation. We calculate their BS wave functions and study their effective
interaction with the pion. Using the effective coupling constant among the
diquarks and the pion, in the heavy quark limit , we calculate
the decay widths of () in the BS formalism under the
covariant instantaneous approximation and then give predictions of the decay
widths .Comment: 41 pages, 1 figure, LaTex2e, typos correcte
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