63,538 research outputs found
Quantum Global Strings and Their Correlation Functions
A full quantum description of global vortex strings is presented in the
framework of a pure Higgs system with a broken global U(1) symmetry in 3+1D. An
explicit expression for the string creation operator is obtained, both in terms
of the Higgs field and in the dual formulation where a Kalb-Ramond
antisymmetric tensor gauge field is employed as the basic field. The quantum
string correlation function is evaluated and from this, the string energy
density is obtained. Potential application in cosmology (cosmic strings) and
condensed matter (vortices in superfluids) are discussed.Comment: 14 pages, latex, no figure
Statistical transmutation of quantum bosonic strings coupled to general four-dimensional Chern-Simons theory
A bosonic string coupled to the generalized Chern-Simons theory in 3+1D
acquires a magnetic field along itself, when it is closed, and a topological
charge at its extremity, when it is open. We construct the creation operators
for the full quantum field states associated to these strings and determine the
dual algebra satisfied by them. We show that the creation operator fo the
composite state of a quantum closed bosonic string, bearing a magnetic flux,
and a topologically charged open bosonic string, possesses generalized
statistics. The relation of our results with previous approaches to the problem
is also established.Comment: 4 pages, Revtex
Les Houches lectures on matrix models and topological strings
In these lecture notes for the Les Houches School on Applications of Random
Matrices in Physics we give an introduction to the connections between matrix
models and topological strings. We first review some basic results of matrix
model technology and then we focus on type B topological strings. We present
the main results of Dijkgraaf and Vafa describing the spacetime string dynamics
on certain Calabi-Yau backgrounds in terms of matrix models, and we emphasize
the connection to geometric transitions and to large N gauge/string duality. We
also use matrix model technology to analyze large N Chern-Simons theory and the
Gopakumar-Vafa transition.Comment: 63 pages, 8 figures, minor correction
Show Me the Money: The CEO Pay Ratio Disclosure Rule and the Quest for Effective Executive Compensation Reform
This Note discusses past attempts to combat growing levels of executive compensation, analyzes the role of both shareholders and directors in the compensation-setting process, and discusses conflicting views concerning shareholder-director power, the disclosure mechanism, and the pay-ratio metric. Finally, this Note balances these views by proposing alterations to the CEO Pay Ratio Disclosure Rule that preserve the long-standing corporate structure, while also offering shareholders an accountability mechanism to enhance the Rule’s intended results
On the BV formulation of boundary superstring field theory
We propose a Batalin-Vilkovisky (BV) formulation of boundary superstring
field theory. The superstring field action is defined in terms of a closed
one-form in the space of couplings, and we compute it explicitly for exactly
solvable tachyon perturbations. We also argue that the superstring field action
defined in this way is the partition function on the disc, in accord with a
previous proposal.Comment: 11 pages, harvma
"Is he crazy?": Students "encounter" confrontational evangelism at ISU
This project investigates ???confrontational evangelism??? on the ISU quad by Brother Jed, the founder and president of the Campus Ministry USA, and the students??? responses. The author asks the following questions: How does the Brother Jed ???encounter??? affect students??? perceptions of religion and faith? How do these perceptions reflect on other students? How do students approach religious and/or ideological conflict? On the basis of seven interviews and participant observation, this research shows that Brother Jed???s provocative statements stimulated a wide variety of responses from students with different backgrounds and interests.unpublishe
Chern-Simons Theory and Topological Strings
We review the relation between Chern-Simons gauge theory and topological
string theory on noncompact Calabi-Yau spaces. This relation has made possible
to give an exact solution of topological string theory on these spaces to all
orders in the string coupling constant. We focus on the construction of this
solution, which is encoded in the topological vertex, and we emphasize the
implications of the physics of string/gauge theory duality for knot theory and
for the geometry of Calabi-Yau manifolds.Comment: 46 pages, RMP style, 25 figures, minor corrections, references adde
Searches for top-antitop quark resonances at with the CMS detector
We present the first results on searches for new massive resonances decaying
to a top-antitop quark () pair with the CMS detector at the LHC in
proton-proton collisions with a center of mass energy of
. The data set considered corresponds to an
integrated luminosity of recorded during the the first
year of the LHC Run-2. Searches are performed by measuring the invariant mass
distribution of the system in semileptonic and fully-hadronic final
states. Dedicated techniques are used to identify the decay of highly-boosted
top quarks in order to maximize the analyses' sensitivity for
resonances with a mass above the TeV scale. No significant excess is observed
in the data compared to the expected SM background and exclusion limits are set
on the cross section of a resonance in various new physics
scenarios.Comment: Contribution to Proceedings of the 9th International Workshop on Top
Quark Physics (TOP 2016), Olomouc, Czech Republic, September 19-23, 201
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