140,781 research outputs found
Supersymmetric SO(10) Grand Unification at the LHC and Beyond
We study models of supersymmetric grand unification based on the SO(10) gauge
group. We investigate scenarios of non-universal gaugino masses including
models containing a mixture of two representations of hidden sector chiral
superfields. We analyse the effect of excluding mu from the fine-tuning
measure, and confront the results with low energy constraints, including the
Higgs boson mass, dark matter relic density and supersymmetry bounds. We also
determine high scale Yukawa coupling ratios and confront the results with
theoretical predictions. Finally, we present two additional benchmarks that
should be explored at the LHC and future colliders.Comment: Published versio
The Costs, Wealth Effects, and Determinants of International Capital Raising: Evidence from Public Yankee Bonds
This paper examines the costs, wealth effects, and determinants of international capital raising for a sample of 260 public debt issues made by non-U.S. firms in the U.S. (Yankee) market. We find that investors demand economically significant premiums on bonds issued by firms that are located in countries that do not protect investors' rights and do not have a prior history of on-going disclosure. The results provide support for the literature that suggests better legal protections and more detailed information disclosure increases the price investors will pay for financial assets. We also find that the average stock price reaction to Yankee bond offerings is significantly positive and that abnormal returns are largest for first-time Yankee bond issuers. In addition, we show that foreign firms tend to issue in the Yankee market when the relative interest cost is low, indicating that potential differences in borrowing costs influence where firms choose to sell bonds.http://deepblue.lib.umich.edu/bitstream/2027.42/39829/3/wp445.pd
Measurement-dependent corrections to work distributions arising from quantum coherences
For a quantum system undergoing a unitary process work is commonly defined
based on the Two Projective Measurement (TPM) protocol which measures the
energies of the system before and after the process. However, it is well known
that projective measurements disregard quantum coherences of the system with
respect to the energy basis, thus removing potential quantum signatures in the
work distribution. Here we consider weak measurements of the system's energy
difference and establish corrections to work averages arising from initial
system coherences. We discuss two weak measurement protocols that couple the
system to a detector, prepared and measured either in the momentum or the
position eigenstates. Work averages are derived for when the system starts in
the proper thermal state versus when the initial system state is a pure state
with thermal diagonal elements and coherences characterised by a set of phases.
We show that by controlling only the phase differences between the energy
eigenstate contributions in the system's initial pure state, the average work
done during the same unitary process can be controlled. By changing the phases
alone one can toggle from regimes where the systems absorbs energy, i.e. a work
cost, to the ones where it emits energy, i.e. work can be drawn. This suggests
that the coherences are additional resources that can be used to manipulate or
store energy in a quantum system.Comment: 9 pages, 3 figure
A New S-S' Pair Creation Rate Expression Improving Upon Zener Curves for I-E Plots
To simplify phenomenology modeling used for charge density wave
(CDW)transport, we apply a wavefunctional formulation of tunneling Hamiltonians
to a physical transport problem characterized by a perturbed washboard
potential. To do so, we consider tunneing between states that are
wavefunctionals of a scalar quantum field. I-E curves that match Zener curves -
used to fit data experimentally with wavefunctionals congruent with the false
vacuum hypothesis. This has a very strong convergence with electron-positron
pair production representations.The similarities in plot behavior of the
current values after the threshold electric field values argue in favor of the
Bardeen pinning gap paradigm proposed for quasi-one-dimensional metallic
transport problems.Comment: 22 pages,6 figures, and extensive editing of certain segments.Paper
has been revised due to acceptance by World press scientific MPLB journal.
This is word version of file which has been submitted to MPLBs editor for
final proofing. Due for publication perhaps in mid spring to early summer
200
Axial-flow pump design digital computer program
FORTRAN program for computerized design of axial flow pump by blade element analysi
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