Colored bosons on top FBA and angular cross section for ttˉt \bar t production

With full data set that corresponds to an integrated luminosity of 9.4 fb$^{-1}$, CDF has updated the top quark forward-backward asymmetry (FBA) as functions of rapidity difference $|\Delta y|$ and $t\bar t$ invariant mass $M_{t\bar t}$. Beside the sustained inconsistency between experiments and standard model (SM) predictions at large $|\Delta y|$ and $M_{t\bar t}$, an unexpected large first Legendre moment with $a_1= 0.39\pm 0.108$ is found. In order to solve the large top FBA, we study the contributions of color triplet scalar and color octet vector boson. We find that the top FBA at $|\Delta y| >1$ and $M_{t\bar t} > 450$ GeV in triplet and octet model could be enhanced to be around 30% and 20%, whereas the first Legendre moment is $a^{\bf Di}_1= 0.38$ and $a^{\bf Axi}_1= 0.23$, respectively.Comment: 13 pages, 5 figures; references adde

Finitness of the basic intersection cohomology of a Killing foliation

We prove that the basic intersection cohomology ${I H}^{^{*}}_{_{\bar{p}}}{(M/\mathcal{F})},$ where $\mathcal{F}$ is the singular foliation determined by an isometric action of a Lie group $G$ on the compact manifold $M$, is finite dimensional

Molecular design of D-π-A-π-D conjugated molecules based on carbazole for application in solar cells

In order to obtain molecules with D-π-A-π-D (donor-π-acceptor-π-donor) architecture, having a high performances photovoltaic effect for the recommended for chemical synthesis for use in the field of organic solar cells. We took the M1 (Kadam et al., 2020) as a reference symbolized in this work by R; the acceptor unit A is replaced by other acceptors, the aim was to explore the efficient organic molecule by investigating the electronic, photovoltaic and optical properties. All calculations were done on Gaussian 09 software, the optimization of the structures of studied molecules, the calculation of HOMO - LUMO energies and the energy gap was carried out by density functional theory (DFT) at B3LYP/6-31G (d) functional. The vertical electronic excitation was determined using time dependent DFT (TD-DFT) at selected hybrid CAM-B3LYP functional. The aim was to find molecules wavelengths, the results established and the properties obtained show the importance of these molecules in the photovoltaic field

The photophysical properties and electronic structures of ((2E, 2’E)-1, 1’-[chalcogen bis (4, 1-phenylene)] bis [3-(4-chlorophenyl) prop-2-en-1-one] derivatives as hole-transporting materials for organic light-emitting diodes (OLEDs). Quantum chemical investigations

In order to propose new organic materials for organic light-emitting diodes (OLEDs) applications, The quantum chemical calculations have been performed on four molecules M0 ((2E, 2’E)-1, 1’ (selenobis (4, 1phenylene)) bis (bis (3-(4-chlorophenyl) prop-2en-1-one)), M1 ((2E, 2’E)-1, 1’ (thiobis (4, 1phenylene)) bis (bis (3-(4-chlorophenyl) prop-2en-1-one)), M2 ((2E, 2’E)-1, 1’ (oxybis (4, 1phenylene)) bis (bis (3-(4-chlorophenyl) prop-2en-1-one)), M3 ((2E, 2’E)-1, 1’ (azanediylbis (4, 1phenylene)) bis (bis (3-(4-chlorophenyl) prop-2en-1-one)).The principal objective of this work is to study the effect of Chalcogen (O, S, and Se) and nitrogen (N) on geometrical, electronic, optical, and charge transfer properties of these compounds by setting their ionization potentials (IP), their electron affinities (EA), their chemical reactivity indices, their reorganization energies, their electrostatic potential as well as the nonlinear optical (NLO) properties. The geometry of these studied compounds was obtained after optimization in their fundamental states by using the functional density theory (DFT) with the B3LYP method and the basis set 6-311G (d, p).  The studied parameters determined from the most stable conformation of each studied molecule. The time-dependent density theory method TD-DFT-B3LYP 6-311G (d, p) was used for the study of absorption. The results of the theoretical calculations show that the mentioned parameters above are affected by the change of atoms O, S, Se, and NH. The smaller hole and electron reorganization energies of these molecules suggest possible use in OLEDs.

Cohomological tautness for Riemannian foliations

In this paper we present some new results on the tautness of Riemannian foliations in their historical context. The first part of the paper gives a short history of the problem. For a closed manifold, the tautness of a Riemannian foliation can be characterized cohomologically. We extend this cohomological characterization to a class of foliations which includes the foliated strata of any singular Riemannian foliation of a closed manifold

Energy properness and Sasakian-Einstein metrics

In this paper, we show that the existence of Sasakian-Einstein metrics is closely related to the properness of corresponding energy functionals. Under the condition that admitting no nontrivial Hamiltonian holomorphic vector field, we prove that the existence of Sasakian-Einstein metric implies a Moser-Trudinger type inequality. At the end of this paper, we also obtain a Miyaoka-Yau type inequality in Sasakian geometry.Comment: 27 page

Energy Linearity and Resolution of the ATLAS Electromagnetic Barrel Calorimeter in an Electron Test-Beam

A module of the ATLAS electromagnetic barrel liquid argon calorimeter was exposed to the CERN electron test-beam at the H8 beam line upgraded for precision momentum measurement. The available energies of the electron beam ranged from 10 to 245 GeV. The electron beam impinged at one point corresponding to a pseudo-rapidity of eta=0.687 and an azimuthal angle of phi=0.28 in the ATLAS coordinate system. A detailed study of several effects biasing the electron energy measurement allowed an energy reconstruction procedure to be developed that ensures a good linearity and a good resolution. Use is made of detailed Monte Carlo simulations based on Geant which describe the longitudinal and transverse shower profiles as well as the energy distributions. For electron energies between 15 GeV and 180 GeV the deviation of the measured incident electron energy over the beam energy is within 0.1%. The systematic uncertainty of the measurement is about 0.1% at low energies and negligible at high energies. The energy resolution is found to be about 10% sqrt(E) for the sampling term and about 0.2% for the local constant term

Randomizing world trade. II. A weighted network analysis

Based on the misleading expectation that weighted network properties always offer a more complete description than purely topological ones, current economic models of the International Trade Network (ITN) generally aim at explaining local weighted properties, not local binary ones. Here we complement our analysis of the binary projections of the ITN by considering its weighted representations. We show that, unlike the binary case, all possible weighted representations of the ITN (directed/undirected, aggregated/disaggregated) cannot be traced back to local country-specific properties, which are therefore of limited informativeness. Our two papers show that traditional macroeconomic approaches systematically fail to capture the key properties of the ITN. In the binary case, they do not focus on the degree sequence and hence cannot characterize or replicate higher-order properties. In the weighted case, they generally focus on the strength sequence, but the knowledge of the latter is not enough in order to understand or reproduce indirect effects.Comment: See also the companion paper (Part I): arXiv:1103.1243 [physics.soc-ph], published as Phys. Rev. E 84, 046117 (2011