On projections of arbitrary lattices

In this paper we prove that given any two point lattices $\Lambda_1 \subset \mathbb{R}^n$ and $\Lambda_2 \subset \nobreak \mathbb{R}^{n-k}$, there is a set of $k$ vectors $\bm{v}_i \in \Lambda_1$ such that $\Lambda_2$ is, up to similarity, arbitrarily close to the projection of $\Lambda_1$ onto the orthogonal complement of the subspace spanned by $\bm{v}_1, \ldots, \bm{v}_k$. This result extends the main theorem of \cite{Sloane2} and has applications in communication theory.Comment: 11 page

Type 0 T-Duality and the Tachyon Coupling

We consider the T-duality relations between Type 0A and 0B theories, and show that this constraints the possible couplings of the tachyon to the RR-fields. Due to the `doubling' of the RR sector in Type 0 theories, we are able to introduce a democratic formulation for the Type 0 effective actions, in which there is no Chern-Simons term in the effective action. Finally we discuss how to embed Type II solutions into Type 0 theories.Comment: some misprints corrected and a reference adde

Type IIB Solutions with Interpolating Supersymmetries

We study type IIB supergravity solutions with four supersymmetries that interpolate between two types widely considered in the literature: the dual of Becker and Becker's compactifications of M-theory to 3 dimensions and the dual of Strominger's torsion compactifications of heterotic theory to 4 dimensions. We find that for all intermediate solutions the internal manifold is not Calabi-Yau, but has SU(3) holonomy in a connection with a torsion given by the 3-form flux. All 3-form and 5-form fluxes, as well as the dilaton, depend on one function appearing in the supersymmetry spinor, which satisfies a nonlinear differential equation. We check that the fields corresponding to a flat bound state of D3/D5-branes lie in our class of solutions. The relations among supergravity fields that we derive should be useful in studying new gravity duals of gauge theories, as well as possibly compactifications.Comment: 27pp, v2 REVTeX4, typographical fixes and minor clarifications, v3 added ref, modified discussion of RR axion slightl

Closed String Tachyons and Semi-Classical Instabilities

We conjecture that the end point of bulk closed string tachyon decay at any non-zero coupling, is the annihilation of space time by Witten's bubble of nothing, resulting in a topological phase of the theory. In support of this we present a variety of situations in which there is a correspondence between the existence of perturbative tachyons in one regime and the semi-classical annihilation of space-time. Our discussion will include many recently investigated scenarios in string theory including Scherk-Schwarz compactifications, Melvin magnetic backgrounds, and noncompact orbifolds. We use this conjecture to investigate a possible web of dualities relating the eleven-dimensional Fabinger-Horava background with nonsupersymmetric string theories. Along the way we point out where our conjecture resolves some of the puzzles associated with bulk closed string tachyon condensation.Comment: 31 pages, 5 figures 3 figures added, typos corrected and references added. Discussion of Type 0/Heterotic s-duality extended and some other points clarified Revision of discussion on Fabinger-Horava string descendents, section on Scherk-Schwarz compactification of Horava-Witten removed, some references adde

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Measurement of D*+/- meson production in jets from pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

This paper reports a measurement of D*+/- meson production in jets from proton-proton collisions at a center-of-mass energy of sqrt(s) = 7 TeV at the CERN Large Hadron Collider. The measurement is based on a data sample recorded with the ATLAS detector with an integrated luminosity of 0.30 pb^-1 for jets with transverse momentum between 25 and 70 GeV in the pseudorapidity range |eta| < 2.5. D*+/- mesons found in jets are fully reconstructed in the decay chain: D*+ -> D0pi+, D0 -> K-pi+, and its charge conjugate. The production rate is found to be N(D*+/-)/N(jet) = 0.025 +/- 0.001(stat.) +/- 0.004(syst.) for D*+/- mesons that carry a fraction z of the jet momentum in the range 0.3 < z < 1. Monte Carlo predictions fail to describe the data at small values of z, and this is most marked at low jet transverse momentum.Comment: 10 pages plus author list (22 pages total), 5 figures, 1 table, matches published version in Physical Review

Search for supersymmetry in final states with jets, missing transverse momentum and one isolated lepton in sqrt{s} = 7 TeV pp collisions using 1 fb-1 of ATLAS data

We present an update of a search for supersymmetry in final states containing jets, missing transverse momentum, and one isolated electron or muon, using 1.04 fb^-1 of proton-proton collision data at sqrt{s} = 7 TeV recorded by the ATLAS experiment at the LHC in the first half of 2011. The analysis is carried out in four distinct signal regions with either three or four jets and variations on the (missing) transverse momentum cuts, resulting in optimized limits for various supersymmetry models. No excess above the standard model background expectation is observed. Limits are set on the visible cross-section of new physics within the kinematic requirements of the search. The results are interpreted as limits on the parameters of the minimal supergravity framework, limits on cross-sections of simplified models with specific squark and gluino decay modes, and limits on parameters of a model with bilinear R-parity violation.Comment: 18 pages plus author list (30 pages total), 9 figures, 4 tables, final version to appear in Physical Review

Desigualdades regionais na mortalidade por câncer de colo de útero no Brasil: tendências e projeções até o ano 2030

O objetivo deste artigo é analisar a tendência temporal da mortalidade por câncer de colo de útero no Brasil e calcular uma projeção até o ano de 2030. Foram analisados os óbitos ocorridos no Brasil de 1996 a 2010 (Sistema de Informações sobre Mortalidade). Foram realizadas análises das tendências da mortalidade por meio da regressão Joinpoint, e para o cálculo das projeções foi utilizado o Nordpred. Para o Brasil, a tendência é de redução (APC = 1, 7% IC95%-2, 2; -1, 1 p < 0, 05), sendo significativa nas regiões centro oeste (APC = -1, 3% ao ano), sudeste (APC =-3, 3%) e sul (APC = -3, 9%). As regiões norte e nordeste apresntam tendência de estabilidade. Os estados do Acre (APC = -6, 5%) e Rio Grande do Sul (APC = -4, 1%) apresentaram as maiores tendências de redução. Na análise das projeções de mortalidade, haverá uma redução das taxas no Brasil a partir do primeiro período projetado, sendo mais marcante para a região sul. As taxas de mortalidade até o ano 2030 serão explicadas, em maior medida, pela redução dos risco para a doença. A mortalidade por câncer de colo de útero apresenta tendência de redução, todavia está desigualmente distribuída no Brasil, com as regiões norte e nordeste apresentando as maiores taxas. The scope of this article is to analyze the temporal trends of cervical cancer mortality in Brazil and calculate the projection of mortality through to the year 2030. Deaths that occurred within the 1996-2010 period were analyzed (Mortality Information System). Mortality trend analysis utilized the Joinpoint regression, while Nordpred was utilized for the calculation of projections. For Brazil, decreasing trends were identified (APC = 1.7% CI95%-2.2; -1.1 p < 0.05). The Midwest region presented a significant reduction trend (APC = -1.3% per year), along with the Southeast (APC = -3.3%) and South (APC = -3.9%) regions. The North and Northeast regions presented stable trends. The states of Acre (APC = -6.5%) and Rio Grande do Sul (APC = -4.1%) presented the most pronounced reduction trends. Analysis of the mortality projections revealed a reduction in mortality rates, starting from the first projected period, with a considerable reduction for the South region. Mortality rates through to the year 2030 are explained, principally, by reductions in the riskof the disease. Cervical cancer mortality presents reducing trends, however these are unequally distributed throughout the country, where the North and Northeast regions present the highest mortality rates