404 research outputs found
Optimal Intermediation Under Aggregate Consumption Uncertainty
The paper develops a banking framework where a welfare comparison is made between non-tradable demand deposit and equity contracts. Contrary to the existing literature that relies heavily on smooth preferences assumption to justify the liquidity insurance superiority of the ârun-proneâ debt contracts over the ârun-freeâ equity contracts, the paper shows that when aggregate consumption uncertainty is introduced, the welfare dominance of deposit contracts emerges for a simpler preference structure as deposit contracts offer more risk-sharing opportunities. The model illustrates that such uncertainty creates a high dispersion between the allocations that can be attained by trading in the secondary market, and therefore the equity contract provides ex ante less risk-sharing to risk-averse consumers than a tailored-made debt contract.financial intermediation, aggregate uncertainty, deposit contracts, equity contracts.
Scale dependence and collinear subtraction terms for Higgs production in gluon fusion at N3LO
The full, explicit, scale dependence of the inclusive N3LO cross section for
single Higgs hadroproduction is obtained by calculating the convolutions of
collinear splitting kernels with lower-order partonic cross sections. We
provide results for all convolutions of splitting kernels and lower-order
partonic cross sections to the order in epsilon needed for the full N3LO
computation, as well as their expansions around the soft limit. We also discuss
the size of the total scale uncertainty at N3LO that can be anticipated with
existing information.Comment: 27 pages, 8 figure, 1 table, 8 ancillary files. v2: added 4
references, changed labelling of contour plot
A model of cytoskeletal reorientation in response to substrate stretching
Living adherent cells change their orientation in response to substrate stretching such that their cytoskeletal components reorganize in a new direction. To study this phenomenon, we model the cytoskeleton as a planar system of elastic cables and struts both pinned at their endpoints to a flat flexible substrate. Tensed (pre-strained) cables represent acting stress fibers, whereas compression-bearing struts represent microtubules. We assume that in response to uniaxial substrate stretching the model reorients and deforms into a new configuration that minimizes its total potential energy. Using the Maxwell's global stability criterion, we find global minima configurations during static extension and compression of the substrate. Based on these results, we predict reorientation during cyclic stretching of the substrate. We find that in response to cyclic stretching cells either reorient transversely to the direction of stretching, or exhibit multiple configurations symmetrically distributed relative to the direction of stretching. These predictions are consistent with experimental data on living cells from the literature
NLO QCD corrections to the production of t-tbar-Z in gluon fusion
We compute the O(alpha_s) QCD corrections to the partonic process gg ->
t-tbar-Z at the LHC. This partonic channel is the dominant component of the
scattering process pp -> t-tbar-Z, which will be important for measuring the
t-tbar-Z electroweak couplings. The O(alpha_s) corrections increase the total
cross section by up to 75% for reasonable choices of the renormalization and
factorization scales. Inclusion of these contributions descreases the residual
scale dependence of the cross section coming from uncalculated higher order
terms to +-5%.Comment: 9 pages, 4 figure
iHixs 2 - Inclusive Higgs Cross Sections
We present a new release of the program iHixs. This easy-to-use tool allows
to derive state of the art predictions for the inclusive production cross
section of a Higgs boson at hadron colliders in the gluon fusion production
mode. This includes the most up-to-date corrections in perturbative QCD and
electro-weak theory, effects due to finite quark masses as well as an option to
perform threshold resummation. In particular, exact perturbative QCD
corrections through N3LO are included in the heavy top quark effective theory.
Furthermore, iHixs contains automatic routines that allow to assess residual
uncertainties on the prediction for the Higgs boson production cross section
according to well established standard definitions. iHixs can be obtained from
https://github.com/dulatf/ihixs .Comment: 46 pages, 3 awesome figure
ISISâs Get Rich Quick Scheme: Sell the Worldâs Cultural Heritage on the Black MarketâPurchasers of ISIS-Looted Syrian Artifacts Are Not Criminally Liable Under the NSPA and the McClain Doctrine in the Eleventh Circuit
This article explores how an individual importing a looted artifact may face prosecution and liability in the Eleventh Judicial Circuit. The article begins with a background section that provides additional information about the history of ISIS and ISISâs current plundering scheme. The background section also provides the legal framework and historical treatment of looted art and stolen artifacts. In particular, this section explains the Eleventh Circuit doctrine on this issue, the McClain doctrine. The McClain doctrine applies the National Stolen Property Act (âNSPAâ) to foreign found-in-the-ground claims. Supporters of the doctrine argue that it helps âprevent looting internationally without placing an unacceptable burden on the cultural objects trade.
QCD corrections to tri-boson production
We present a computation of the next-to-leading order QCD corrections to the
production of three Z bosons at the LHC. We calculate these corrections using a
completely numerical method that combines sector decomposition to extract
infrared singularities with contour deformation of the Feynman parameter
integrals to avoid internal loop thresholds. The NLO QCD corrections to pp ->
ZZZ are approximately 50%, and are badly underestimated by the leading order
scale dependence. However, the kinematic dependence of the corrections is
minimal in phase space regions accessible at leading order.Comment: 15 pages, 3 figures; typos fixed, references and event listing adde
ISISâs Get Rich Quick Scheme: Sell the Worldâs Cultural Heritage on the Black MarketâPurchasers of ISIS-Looted Syrian Artifacts Are Not Criminally Liable Under the NSPA and the McClain Doctrine in the Eleventh Circuit
This article explores how an individual importing a looted artifact may face prosecution and liability in the Eleventh Judicial Circuit. The article begins with a background section that provides additional information about the history of ISIS and ISISâs current plundering scheme. The background section also provides the legal framework and historical treatment of looted art and stolen artifacts. In particular, this section explains the Eleventh Circuit doctrine on this issue, the McClain doctrine. The McClain doctrine applies the National Stolen Property Act (âNSPAâ) to foreign found-in-the-ground claims. Supporters of the doctrine argue that it helps âprevent looting internationally without placing an unacceptable burden on the cultural objects trade.
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