Un molde doble de piedra para la fabricación de hachas planas procedente de El Molino de Garrejo (Garay, Soria)

En este artículo se presenta un interesante molde labrado sobre un bloque rectangular de piedra arenisca de grano fino-medio, para la fabricación de dos hachas planas. Las dos matrices se encuentran centradas en el eje longitudinal de la cara superior del bloque, enfrentadas por los filos con los bebederos abiertos en los extremos opuestos del molde.This paper describes an interesting mould for the manufacturing of two flat axes, carved on a rectangular medium-fine grained sandstone block. Both matrices are centred on the longitudinal axis of the upper surface of the block. The axes are positioned with their cutting edges placed face to face, while the sprue gates are located at the opposite ends of the mould

«M(arcus) Marius», un joven cascantino en Numancia

This brief report presents a new Roman funerary stele from the Numantia area. The simple inscription is dedicated to Marcus Marius, a young emigrant from the Roman city of Cascantum, who died and was buried in this region of the Upper Duero around the turn of BCE/CE or shortly after.En esta breve comunicación se da a conocer una nueva estela funeraria romana procedente de los alrededores de Numancia. La sencilla inscripción está dedicada a Marco Mario, un joven emigrante de la ciudad romana de Cascantum, que murió y fue enterrado en estas tierras del Alto Duero hacia el cambio de era o poco después

Comentarios en torno a las dos llegadas de Escipión a Numancia: deconstruyendo a Schulten

Analsys of the interpretations made by Professor Adolf Schulten regarding to some texts of Appian’s Iberiké related to Numantia war and that have little or nothing to do with the or iginal work of the Alexandrian historian. These are the episodes referring to the two arrivals of Scipio Aemilianus to Numantia. The first one after hardening and disciplining the army, and the second one after his journey through Vaccaei lands to initiate the siege works of the Celtiberian city. Our alternative comments are also provided.Se analizan las interpretaciones que hizo el profesor Adolf Schulten de algunos textos de la Iberiké de Apiano correspondientes a la guerra numantina, y que poco o nada tienen que ver con el relato del historiador alejandrino. Se trata de los pasajes referidos a las dos llegadas de Escipión Emiliano a Numancia: el primero tras endurecer y disciplinar al ejército, y el segundo después del periplo por tierras vacceas para iniciar los trabajos de asedio a la ciudad celtíbera. También se aportan nuestros comentarios alternativos

Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC

The uncertainty on the calorimeter energy response to jets of particles is derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the calorimeter response to single isolated charged hadrons is measured and compared to the Monte Carlo simulation using proton-proton collisions at centre-of-mass energies of sqrt(s) = 900 GeV and 7 TeV collected during 2009 and 2010. Then, using the decay of K_s and Lambda particles, the calorimeter response to specific types of particles (positively and negatively charged pions, protons, and anti-protons) is measured and compared to the Monte Carlo predictions. Finally, the jet energy scale uncertainty is determined by propagating the response uncertainty for single charged and neutral particles to jets. The response uncertainty is 2-5% for central isolated hadrons and 1-3% for the final calorimeter jet energy scale.Comment: 24 pages plus author list (36 pages total), 23 figures, 1 table, submitted to European Physical Journal

Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector

This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at √s=7 TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb−1. Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. Kinematic variables, based on the properties of displaced decay vertices and optimised for jet flavour identification, are used in a multidimensional template fit to measure the fractions of these dijet flavour states as functions of the leading jet transverse momentum in the range 40 GeV to 500 GeV and jet rapidity |y|<2.1. The fit results agree with the predictions of leading- and next-to-leading-order calculations, with the exception of the dijet fraction composed of bottom and light flavour jets, which is underestimated by all models at large transverse jet momenta. The ability to identify jets containing two b-hadrons, originating from e.g. gluon splitting, is demonstrated. The difference between bottom jet production rates in leading and subleading jets is consistent with the next-to-leading-order predictions

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

Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC

Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. Rcp varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02

Observation of associated near-side and away-side long-range correlations in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector

Two-particle correlations in relative azimuthal angle (Δϕ) and pseudorapidity (Δη) are measured in √sNN=5.02  TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1  μb-1 of data as a function of transverse momentum (pT) and the transverse energy (ΣETPb) summed over 3.1<η<4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2<|Δη|<5) “near-side” (Δϕ∼0) correlation that grows rapidly with increasing ΣETPb. A long-range “away-side” (Δϕ∼π) correlation, obtained by subtracting the expected contributions from recoiling dijets and other sources estimated using events with small ΣETPb, is found to match the near-side correlation in magnitude, shape (in Δη and Δϕ) and ΣETPb dependence. The resultant Δϕ correlation is approximately symmetric about π/2, and is consistent with a dominant cos⁡2Δϕ modulation for all ΣETPb ranges and particle pT