
Greynat, D., de Rafael, E., & Vulvert, G. (2014). Asymptotic behaviour of pionpion total crosssections. J. High Energy Phys., 03(3), 107–21pp.
Abstract: We derive a sum rule which shows that the FroissartMartin bound for the asymptotic behaviour of the pi pi total cross sections at high energies, if modulated by the LukaszukMartin coefficient of the leading log(2)s behaviour, cannot be an optimal bound in QCD. We next compute the total cross sections for pi(+)pi(), pi(+/)pi(0) and pi(0)pi(0) scattering within the framework of the constituent chiral quark model (C chi QM) in the limit of a large number of colours Nc and discuss their asymptotic behaviours. The same pi pi cross sections are also discussed within the general framework of LargeNc QCD and we show that it is possible to make an Ansatz for the isospin I = 1 and I = 0 spectrum which satisfy the FroissartMartin bound with coefficients which, contrary to the LukaszukMartin coefficient, are not singular in the chiral limit and have the correct LargeNc counting. We finally propose a simple phenomenological model which matches the low energy behaviours of the sigma(total)(pi +/pi 0)(s) cross section predicted by the CxQM with the high energy behaviour predicted by the LargeNc Ansatz. The magnitude of these cross sections at very high energies is of the order of those observed for the pp and pp scattering total cross sections.



ATLAS Collaboration(Aad, G. et al), Cabrera Urban, S., Castillo Gimenez, V., Costa, M. J., Fassi, F., Ferrer, A., et al. (2014). Standalone vertex finding in the ATLAS muon spectrometer. J. Instrum., 9, P02001–39pp.
Abstract: A dedicated reconstruction algorithm to find decay vertices in the ATLAS muon spectrometer is presented. The algorithm searches the region just upstream of or inside the muon spectrometer volume for multiparticle vertices that originate from the decay of particles with long decay paths. The performance of the algorithm is evaluated using both a sample of simulated Higgs boson events, in which the Higgs boson decays to longlived neutral particles that in turn decay to b (b) over bar final states, and pp collision data at root s = 7 TeV collected with the ATLAS detector at the LHC during 2011.



GonzalezSevilla, S. et al, Bernabeu Verdu, J., Civera, J. V., Garcia, C., Lacasta, C., Marco, R., et al. (2014). A doublesided silicon microstrip SuperModule for the ATLAS Inner Detector upgrade in the HighLuminosity LHC. J. Instrum., 9, P02003–37pp.
Abstract: The ATLAS experiment is a general purpose detector aiming to fully exploit the discovery potential of the Large Hadron Collider (LHC) at CERN. It is foreseen that after several years of successful datataking, the LHC physics programme will be extended in the socalled HighLuminosity LHC, where the instantaneous luminosity will be increased up to 5 x 10(34) cm(2) s(1). For ATLAS, an upgrade scenario will imply the complete replacement of its internal tracker, as the existing detector will not provide the required performance due to the cumulated radiation damage and the increase in the detector occupancy. The current baseline layout for the new ATLAS tracker is an allsiliconbased detector, with pixel sensors in the inner layers and silicon microstrip detectors at intermediate and outer radii. The supermodule is an integration concept proposed for the strip region of the future ATLAS tracker, where doublesided stereo silicon microstrip modules are assembled into a lowmass local support structure. An electrical supermodule prototype for eight doublesided strip modules has been constructed. The aim is to exercise the multimodule readout chain and to investigate the noise performance of such a system. In this paper, the main components of the current supermodule prototype are described and its electrical performance is presented in detail.



Pastore, A., Davesne, D., & Navarro, J. (2014). Nuclear matter response function with a central plus tensor Landau interaction. J. Phys. G, 41(5), 055103–17pp.
Abstract: We present a method to obtain response functions in the random phase approximation (RPA) based on a residual interaction described in terms of Landau parameters with central plus tensor contributions. The response functions keep the explicit momentum dependence of the RPA, in contrast with the traditional Landau approximation. Results for symmetric nuclear matter and pure neutron matter are presented using Landau parameters derived from finiterange interactions, both phenomenological and microscopic. We study the convergence of response functions as the number of Landau parameters is increased.



Koolen, B. B., VidalSicart, S., Benlloch, J. M., & Olmos, R. A. V. (2014). Evaluating heterogeneity of primary tumor 18 FFDG uptake in breast cancer with a dedicated breast PET ( MAMMI): a feasibility study based on correlation with PET/CT. Nucl. Med. Commun., 35(5), 446–452.
Abstract: PurposeThe aim of the study was to evaluate the heterogeneity of primary tumor F18fluorodeoxyglucose (F18FDG) uptake in breast cancer patients using a dedicated breast PET.Patients and methodsA positron emission tomography/computed tomography (PET/CT) of the thorax was performed 60 min after administration of 180240 MBq of F18FDG in patients with breast cancer. Subsequently, 110 min after injection, a scan was taken with a dedicated highresolution breast PET [MAMmography with Molecular Imaging (MAMMI)]. Both procedures were performed with the patients in the prone position. Fourpoint scores were used to compare the intensity (0: none; 1: mild; 2: moderate; 3: high) and heterogeneity (0: none; 1: mild; 2: moderate; 3: high) of F18FDG uptake between PET/CT and MAMMI images.ResultsThirtyfive patients in whom the primary tumor was visualized on both scans were included in this analysis. The mean primary tumor size was 35.1 mm (range 10108 mm). The mean intensity score was similar on both devices (2.4 for PET/CT and 2.3 for MAMMI; P=0.439), but the mean heterogeneity score on MAMMI images was significantly higher (PET/CT 1.9 vs. MAMMI 2.3; P=0.005). MAMMI showed a higher heterogeneity score in 11 (31%) of 35 patients, especially in tumors with moderate or high intensity. Significantly higher heterogeneity scores on both PET/CT and MAMMI were seen in large tumors (P=0.005 and 0.014, respectively) and in tumors with high intensity scores (P=0.012 and P<0.001, respectively).ConclusionHeterogeneous tumor F18FDG uptake in breast cancer is frequently observed, particularly in large tumors with intense F18FDG uptake. It is more often seen on MAMMI PET than on conventional PET/CT. Although the observed heterogeneity should be proven histopathologically, this finding offers a rationale for F18FDGguided biopsies.



HerreraAguilar, A., Rojas, A. D., & Santos, E. (2014). Localization of gauge fields in a tachyonic de Sitter thick braneworld. Eur. Phys. J. C, 74(4), 2770–6pp.
Abstract: In this work we show that universal gauge vector fields can be localized on the recently proposed 5D thick tachyonic braneworld which involves a de Sitter cosmological background induced on the 3brane. Namely, by performing a suitable decomposition of the vector field, the resulting 4D effective action corresponds to a massive gauge field, while the profile along the extra dimension obeys a Schrodingerlike equation with a PoschlTeller potential. It turns out that the massless zero mode of the gauge field is bound to the expanding 3brane and allows us to recover the standard 4D electromagnetic phenomena of our world. Moreover, this zero mode is separated from the continuum of KaluzaKlein (KK) modes by a mass gap determined by the scale of the expansion parameter. We also were able to analytically solve the corresponding Schrodingerlike equation for arbitrary mass, showing that KK massive modes asymptotically behave like plane waves, as expected.



Moradi, F. G. et al, & Huyuk, T. (2014). Spectroscopy of the neutrondeficient N=50 nucleus Rh95. Phys. Rev. C, 89(4), 044310–8pp.
Abstract: The neutrondeficient semimagic (neutron number N = 50) Rh95 nucleus has been produced at high spins using the projectiletarget system Ca40 + Ni58 at 125 MeV beam energy. The gammadecays of levels populated by the 3p fusion evaporation reaction channel were studied using gammagamma coincidences, and 20 new gammaray transitions involving 15 new positiveand negativeparity states were observed. Spin and parity for many of the excited states were firmly deduced for the first time using the combined directional angular correlation and directionpolarization techniques. The observed structures are discussed within the framework of largescale shell model calculations. E1 transition strengths were deduced and used together with the results of the shell model calculations to study the contribution of different particlehole configurations, in particular for analyzing contributions from coreexcited configurations.



Adey, D. et al, CerveraVillanueva, A., Donini, A., Ghosh, T., GomezCadenas, J. J., Hernandez, P., et al. (2014). Light sterile neutrino sensitivity at the nuSTORM facility. Phys. Rev. D, 89(7), 071301–7pp.
Abstract: A facility that can deliver beams of electron and muon neutrinos from the decay of a stored muon beam has the potential to unambiguously resolve the issue of the evidence for light sterile neutrinos that arises in shortbaseline neutrino oscillation experiments and from estimates of the effective number of neutrino flavors from fits to cosmological data. In this paper, we show that the nuSTORM facility, with stored muons of 3.8 GeV/c +/ 10%, will be able to carry out a conclusive muon neutrino appearance search for sterile neutrinos and test the LSND and MiniBooNE experimental signals with 10 sigma sensitivity, even assuming conservative estimates for the systematic uncertainties. This experiment would add greatly to our knowledge of the contribution of light sterile neutrinos to the number of effective neutrino flavors from the abundance of primordial helium production and from constraints on neutrino energy density from the cosmic microwave background. The appearance search is complemented by a simultaneous muon neutrino disappearance analysis that will facilitate tests of various sterile neutrino models.



Hernandez, P., Kekic, M., & LopezPavon, J. (2014). Lowscale seesaw models versus Neff. Phys. Rev. D, 89(7), 073009–7pp.
Abstract: We consider the contribution of the extra sterile states in generic lowscale seesaw models to extra radiation, parametrized by Neff. We find that the value of Neff is roughly independent of the seesaw scale within a wide range. We explore the full parameter space in the case of two extra sterile states and find that these models are strongly constrained by cosmological data for any value of the seesaw scale below O(100 MeV).



Bayar, M., Liang, W. H., Uchino, T., & Xiao, C. W. (2014). Description of rho(1700) as a rho Kappa(sic) system with the fixedcenter approximation. Eur. Phys. J. A, 50(4), 67–10pp.
Abstract: We study the system with the aim to describe the rho(1700) resonance. The chiral unitary approach has achieved success in the description of systems of the light hadron sector. With this method, the system in the isospin sector I = 0, is found to be a dominant component of the f (0)(980) resonance. Therefore, by regarding the system as a cluster, the f (0)(980) resonance, we evaluate the system applying the fixedcenter approximation to the Faddeev equations. We construct the rho K unitarized amplitude using the chiral unitary approach. As a result, we find a peak in the threebody amplitude around 1732 MeV and a width of about 161 MeV. The effect of the width of the rho and f (0)(980) is also discussed. We associate this peak to the rho(1700) which has a mass of 1720 +/ 20MeV and a width of 250 +/ 100 MeV.

