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1. Understanding the origin of early-type dwarfs: The spectrophotometric study of CGCG014-074

Author

Guevara, N., Escudero, C. G., and Faifer, F. R.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Early-type dwarf galaxies constitute a prevalent population in the central regions of rich groups and clusters in the local Universe. These low-luminosity and low-mass stellar systems play a fundamental role in the assembly of the luminous galaxies observed today, according to the $\Lambda$CDM hierarchical theory. The origin of early-type dwarfs has been linked to the transformation of disk galaxies interacting with the intracluster medium, especially in dense environments. However, the existence of low-luminosity early-type galaxies in low-density environments presents a challenge to this scenario. This study presents a comprehensive photometric and spectroscopic analysis of the early-type dwarf galaxy CGCG014-074 using deep GEMINI+GMOS data, focusing on its peculiarities and evolutionary implications. CGCG014-074 exhibits distinct features, including a rotating inner disk, an extended stellar formation with a quiescent phase since about 2 Gyr ago, and the presence of boxy isophotes. From the kinematic analysis, we confirm CGCG014-074 as a nucleated early-type dwarf galaxy with embedded disk. The study of its stellar population parameters using different methods provides significant insights into the galaxy's evolutionary history. These results show an old and metal-poor nucleus ($\sim 9.3$ Gyr and $\mathrm{[Z/H]}\sim-0.84$ dex), while the stellar disk is younger ($\sim4.4$ Gyr) with a higher metallicity ($\mathrm{[Z/H]}\sim-0.40$ dex). These distinctive features collectively position CGCG014-074 as a likely building block galaxy that has evolved passively throughout its history., Comment: 11 pages, 8 figures. Accepted to be published in MNRAS

Published
2024
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2. Optimal Trade Characterizations in Multi-Asset Crypto-Financial Markets

Author

Escudero, C., Lara, F., and Sama, M.

Subjects
Mathematics - Optimization and Control, Quantitative Finance - Mathematical Finance
Abstract

This work focuses on the mathematical study of constant function market makers. We rigorously establish the conditions for optimal trading under the assumption of a quasilinear, but not necessarily convex (or concave), trade function. This generalizes previous results that used convexity, and also guarantees the robustness against arbitrage of so-designed automatic market makers. The theoretical results are illustrated by families of examples given by generalized means, and also by numerical simulations in certain concrete cases. These simulations along with the mathematical analysis suggest that the quasilinear-trade-function based automatic market makers might replicate the functioning of those based on convex functions, in particular regarding their resilience to arbitrage.

Published
2024

3. Fine Time Measurement for the Internet of Things: A Practical Approach Using ESP32

Author

Vales, V. Barral, Fernández, O. C., Domínguez-Bolaño, T., Escudero, C. J., and García-Naya, José A.

Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract

In the world of Internet of Things (IoT), obtaining the physical location of devices has always been a task of great interest for developing increasingly complex location-based services (LBS). That is why in recent years wireless communication standards have been incorporating new additions focused on providing localization mechanisms to technologies widely used in the IoT world, such as Wi-Fi or Bluetooth. In particular, the IEEE 802.11-2016 Wi-Fi standard introduced ranging estimation between two devices through the so-called fine time measurement (FTM) protocol, defined by the IEEE 802.11mc. FTM is not yet widespread in the IoT field, but commercial modules capable of offering this functionality at a reasonable price are starting to appear. In early 2021, the most widespread system on a chip (SOC) family among IoT devices, the ESP32-XX series, added support for this Wi-Fi standard, enabling, for the first time, the use of a standard designed for location-based systems. This article analyzes the performance of this FTM implementation by carrying out and studying several measurement campaigns in different indoor and outdoor scenarios. Additionally, this work proposes an alternative real-time implementation for distance estimation inside the ESP32 using an approach based on machine learning. Such an implementation is successfully validated in a scenario totally different than those considered for the training and test sets. Finally, both the measurement sets and the developed software are available to the scientific community., Comment: 14 pages, 21 figures, Published in IEEE Internet of Things Journal

Published
2024
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4. Time-dependent forces between a swift electron and a small nanoparticle within the dipole approximation

Author

Castrejón-Figueroa, J., Castellanos-Reyes, J. Á., Maciel-Escudero, C., Reyes-Coronado, A., and Barrera, R. G.

Subjects
Physics - Classical Physics
Abstract

In this paper we calculate the time-dependent forces between a swift electron traveling at constant velocity and a metallic nanoparticle made of either aluminum or gold. We consider that the nanoparticle responds as an electric point dipole and we use classical electrodynamics to calculate the force on both the nanoparticle and the electron. The values for the velocity of the electron and the radius of the nanoparticle were chosen in accordance with electron microscopy observations, and the impact parameter was selected to fulfill the constraints imposed by the dipole approximation. We found that there are times when the force on the nanoparticle is attractive and others when it is repulsive, and show that this is due to the delayed electromagnetic response of the nanoparticle. To establish the limits of validity of our approach, we calculate the total linear momentum transfer to the nanoparticle, and compare it with results obtained, in frequency space, using the full multipole expansion of the fields induced on the nanoparticle, considering the effects of electromagnetic radiation.

Published
2021
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6. Pixel color-magnitude diagrams of galaxies in the Fornax cluster using S-PLUS images

Author

Escudero, C. G., Castelli, A. V. Smith, Faifer, F. R., Sesto, L. A., de Oliveira, C. L. Mendes, Herpich, F. R., and Barbosa, C. E.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Galaxy clusters are the largest gravitationally bound systems in the Universe and, as such, play an important role in cosmological studies. An important resource for studying their properties in a statistical manner are homogeneous and large image datasets covering diverse environments. In this sense, the wide-field images (1.4 deg^{2}) obtained by the Southern Photometric Local Universe Survey (S-PLUS) in 12 optical bands, constitute a valuable tool for that type of studies. In this work, we present a photometric analysis of pixel color-magnitude diagrams, corresponding to a sample of 24 galaxies of different morphological types located in the Fornax cluster., Comment: 3 pages, 4 figures, accepted to be published in Boletin de la Asociacion Argentina de Astronomia

Published
2021

7. The Fornax Cluster through S-PLUS

Author

Castelli, A. V. Smith, de Oliveira, C. Mendes, Herpich, F., Barbosa, C. E., Escudero, C., Grossi, M., Sodre, L., de Bom, C. R., Zenocratti, L., De Rossi, M. E., Cortesi, A., Fernandes, R. Cid, Lopes, A. R., Telles, E., Schwarz, G. B. Oliveira, Dantas, M. L. L., Faifer, F. R., Santos, A. Chies, Saponara, J., Reynaldi, V., Andruchow, I., Sesto, L., Mestre, M. F., de Amorim, A. L., de Lima, E. V. R., Abboud, J. C. R., Cernic, V., and Garcia, I. Souza de Almeida

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Southern Photometric Local Universe Survey (S-PLUS) aims to map $\approx$ 9300 deg$^2$ of the Southern sky using the Javalambre filter system of 12 optical bands, 5 Sloan-like filters and 7 narrow-band filters centered on several prominent stellar features ([OII], Ca H+K, D4000, H$_{\delta}$, Mgb, H$_{\alpha}$ and CaT). S-PLUS is carried out with the T80-South, a new robotic 0.826-m telescope located on CTIO, equipped with a wide FoV camera (2 deg$^2$). In this poster we introduce project #59 of the S-PLUS collaboration aimed at studying the Fornax galaxy cluster covering an sky area of $\approx$ 11 $\times$ 7 deg$^2$, and with homogeneous photometry in the 12 optical bands of S-PLUS (Coordinator: A. Smith Castelli)., Comment: 3 pages, 5 figures; accepted to be published in Bolet\'in de la Asociaci\'on Argentina de Astronom\'ia

Published
2021

8. Probing and steering bulk and surface phonon polaritons in uniaxial materials using fast electrons: hexagonal boron nitride

Author

Maciel-Escudero, C., Konečná, Andrea, Hillenbrand, Rainer, and Aizpurua, Javier

Subjects
Condensed Matter - Materials Science
Abstract

We theoretically describe how fast electrons couple to polaritonic modes in uniaxial materials by analyzing the electron energy loss (EEL) spectra. We show that in the case of an uniaxial medium with hyperbolic dispersion, bulk and surface modes can be excited by a fast electron traveling through the volume or along an infinite interface between the material and vacuum. Interestingly, and in contrast to the excitations in isotropic materials, bulk modes can be excited by fast electrons traveling outside the uniaxial medium. We demonstrate our findings with the representative uniaxial material hexagonal boron nitride. We show that the excitation of bulk and surface phonon polariton modes is strongly related to the electron velocity and highly dependent on the angle between the electron beam trajectory and the optical axis of the material. Our work provides a systematic study for understanding bulk and surface polaritons excited by a fast electron beam in hyperbolic materials and sets a way to steer and control the propagation of the polaritonic waves by changing the electron velocity and its direction.

Published
2020
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9. Coronavirus Optimization Algorithm: A bioinspired metaheuristic based on the COVID-19 propagation model

Author

Martínez-Álvarez, F., Asencio-Cortés, G., Torres, J. F., Gutiérrez-Avilés, D., Melgar-García, L., Pérez-Chacón, R., Rubio-Escudero, C., Riquelme, J. C., and Troncoso, A.

Subjects
Computer Science - Artificial Intelligence
Abstract

A novel bioinspired metaheuristic is proposed in this work, simulating how the coronavirus spreads and infects healthy people. From an initial individual (the patient zero), the coronavirus infects new patients at known rates, creating new populations of infected people. Every individual can either die or infect and, afterwards, be sent to the recovered population. Relevant terms such as re-infection probability, super-spreading rate or traveling rate are introduced in the model in order to simulate as accurately as possible the coronavirus activity. The Coronavirus Optimization Algorithm has two major advantages compared to other similar strategies. First, the input parameters are already set according to the disease statistics, preventing researchers from initializing them with arbitrary values. Second, the approach has the ability of ending after several iterations, without setting this value either. Infected population initially grows at an exponential rate but after some iterations, when considering social isolation measures and the high number recovered and dead people, the number of infected people starts decreasing in subsequent iterations. Furthermore, a parallel multi-virus version is proposed in which several coronavirus strains evolve over time and explore wider search space areas in less iterations. Finally, the metaheuristic has been combined with deep learning models, in order to find optimal hyperparameters during the training phase. As application case, the problem of electricity load time series forecasting has been addressed, showing quite remarkable performance., Comment: 30 pages, 4 figures

Published
2020
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10. Field/Isolated lenticular galaxies with high $S_N$ values: the case of NGC 4546 and its globular cluster system

Author

Escudero, C. G., Faifer, F. R., Castelli, A. V. Smith, Norris, M. A., and Forte, J. C.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We present a photometric study of the field lenticular galaxy NGC 4546 using Gemini/GMOS imaging in g'r'i'z'. We perform a 2D image decomposition of the surface brightness distribution of the galaxy using GALFIT, finding that four components adequately describe it. The subtraction of this model from our images and the construction of a colour map allow us to examine in great detail the asymmetric dust structures around the galactic centre. In addition, we perform a detailed analysis of the globular cluster (GC) system of NGC 4546. Using a Gaussian Mixture Model algorithm in the colour-colour plane we detected hints of multiple groups of GC candidates: the classic blue and red subpopulations, a group with intermediate colours that present a concentrated spatial distribution towards the galaxy, and an additional group towards the red end of the colour distribution. We estimate a total GC population for NGC 4546 of $390\pm60$ members and specific frequency $S_N=3.3\pm0.7$, which is relatively high compared to the typical value for galaxies of similar masses and environment. We suggest that the unusual GC population substructures were possibly formed during the interaction that led to the formation of the young ultra-compact dwarf (NGC 4546-UCD1) found in this system. Finally, we estimate the distance modulus of NGC 4546 by analyzing its luminosity function, resulting in $(m-M)=30.75\pm0.12$ mag (14.1 Mpc)., Comment: 18 pages, 24 figures. Accepted for publication in MNRAS

Published
2020
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11. Dark Biosphere

Author

Escudero, C., Gargaud, Muriel, editor, Irvine, William M., editor, Amils, Ricardo, editor, Claeys, Philippe, editor, Cleaves, Henderson James, editor, Gerin, Maryvonne, editor, Rouan, Daniel, editor, Spohn, Tilman, editor, Tirard, Stéphane, editor, and Viso, Michel, editor

Published
2023
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12. Galaxias de bajo brillo superficial: analogas a los sat\'elites de Andr\'omeda en Pegasus I?

Author

González, N., Castelli, A. Smith, Faifer, F., Cellone, S. A., and Escudero, C.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Here we show the preliminary results of a study where there seems to be a bias effect in the size distributions of the detected low-surface brightness (LSB) galaxies in different environments. In this sense, more distant groups/clusters would lack small effective radius objects, while large systems would not found in the Local Group and nearby environments. While there may be an actual shortage of large LSB galaxies in low-density environments like the Local Group, the non-detection of small (and faint) systems at large distances is clearly a selection effect. As an example, LSB galaxies with similar sizes to those of the satellites of Andromeda in the Local Group, will be certainly missed in a visual identification at the distance of Pegasus I., Comment: 3 pages, 4 figures

Published
2019

13. In-situ study of the carbon gasification reaction of highly oriented pyrolytic graphite promoted by cobalt oxides and the novel nanostructures appeared after reaction

Author

Morales, C, Díaz-Fernández, D, Prieto, P, Lu, YH, Kersell, H, Campo, A del, Escudero, C, Pérez-Dieste, V, Ashby, P, Méndez, J, and Soriano, L

Subjects
Chemical Sciences, Physical Chemistry, Engineering, Physical Sciences, Nanotechnology, Condensed Matter Physics, Bioengineering, Nanoscience & Nanotechnology, Chemical sciences, Physical sciences
Abstract

Cobalt interaction and its effects on carbon-based systems at the nanoscale have recently attracted much attention in different fields, such as catalysis of carbon nanotubes or graphene and graphite nano-patterning taking advantage of its ferromagnetic behavior. Experiments performed in our laboratories show how the re-oxidation process of two equivalent monolayers of CoO deposited on highly oriented pyrolytic graphite at 400 °C leads to the formation of nanochannels at lower temperature than using other methods. Here we present the in-situ characterization of the carbon gasification reaction that drives this process by means of near ambient pressure X-ray photoelectron spectroscopy performed at the ALBA synchrotron facility. The reason why this reaction takes place at such low temperature compared to other methods is due to the weakening of the carbon σ bonds by the initial CoO wetting layer formed at the early stages of growth on the graphite surface. Besides nanochannels, ex-situ atomic force microscopy measurements also show the appearance of two more kinds of nanostructures: nano-strips and nano-rings. The appearance of these nanostructures reveals the impressive modification of the surface after the re-oxidation process mediated by the cobalt oxide.

Published
2020

14. Propiedades fotom\'etricas de las galaxias enanas de bajo brillo superficial en la zona central del grupo Pegasus I

Author

González, N., Cellone, S. A., Castelli, A. Smith, Faifer, F., and Escudero, C.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Here we show the preliminary results of a photometric study of low surface brightness objects with $\mu_{g'}~\gtrsim~25$~mag/arcsec$^2$. These objects are present in several fields obtained with GEMINI-GMOS, in the central region of the Pegasus I group. We found that their photometric characteristics are similar to the so-called dwarf spheroidal galaxies or to the ultra low surface brightness galaxies., Comment: in Spanish

Published
2018

15. Encounter-controlled coalescence and annihilation on a one-dimensional growing domain

Author

Vot, F. Le, Escudero, C., Abad, E., and Yuste, S. B.

Subjects
Condensed Matter - Statistical Mechanics
Abstract

The kinetics of encounter-controlled processes in growing domains is markedly different from that in a static domain. Here, we consider the specific example of diffusion limited coalescence and annihilation reactions in one-dimensional space. In the static case, such reactions are among the few systems amenable to exact solution, which can be obtained by means of a well-known method of intervals. In the case of a uniformly growing domain, we show that a double transformation in time and space allows one to extend this method to compute the main quantities characterizing the spatial and temporal behavior. We show that a sufficiently fast domain growth brings about drastic changes in the behavior. In this case, the reactions stop prematurely, as a result of which the survival probability of the reacting particles tends to a finite value at long times and their spatial distribution freezes before reaching the fully self-ordered state. We obtain exact results for the survival probability and for key properties characterizing the degree of self-ordering induced by the chemical reactions, i.e., the interparticle distribution function and the pair correlation function. These results are confirmed by numerical simulations., Comment: 40 pages, 10 figures

Published
2018
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16. Reaction-diffusion kinetics in growing domains

Author

Escudero, C., Yuste, S. B., Abad, E., and Vot, F. Le

Subjects
Condensed Matter - Statistical Mechanics
Abstract

Reaction-diffusion models have been used over decades to study biological systems. In this context, evolution equations for probability distribution functions and the associated stochastic differential equations have nowadays become indispensable tools. In population dynamics, say, such approaches are utilized to study many systems, e.g., colonies of microorganisms or ecological systems. While the majority of studies focus on the case of a static domain, the time-dependent case is also important, as it allows one to deal with situations where the domain growth takes place over time scales that are relevant for the computation of reaction rates and of the associated reactant distributions. Such situations are indeed frequently encountered in the field of developmental biology, notably in connection with pattern formation, embryo growth or morphogen gradient formation. In this chapter, we review some recent advances in the study of pure diffusion processes in growing domains. These results are subsequently taken as a starting point to study the kinetics of a simple reaction-diffusion process, i.e., the encounter-controlled annihilation reaction. The outcome of the present work is expected to pave the way for the study of more complex reaction-diffusion systems of possible relevance in various fields of research., Comment: Invited chapter to the volume 39 of Handbook of Statistics (Elsevier), accepted for publication

Published
2018

17. Tracing the Assembly History of NGC 1395 through its Globular Cluster System

Author

Escudero, C. G., Faifer, F. R., Castelli, A. V. Smith, Forte, J. C., Sesto, L. A., González, N. M., and Scalia, M. C.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

We used deep Gemini-South/GMOS g'r'i'z' images to study the globular cluster (GC) system of the massive elliptical galaxy NGC 1395, located in the Eridanus supergroup. The photometric analysis of the GC candidates reveals a clear colour bimodality distribution, indicating the presence of "blue" and "red" GC subpopulations. While a negative radial colour gradient is detected in the projected spatial distribution of the red GCs, the blue GCs display a shallow colour gradient. The blue GCs also display a remarkable shallow and extended surface density profile, suggesting a significant accretion of low-mass satellites in the outer halo of the galaxy. In addition, the slope of the projected spatial distribution of the blue GCs in the outer regions of the galaxy, is similar to that of the X-ray halo emission. Integrating up to 165 kpc the profile of the projected spatial distribution of the GCs, we estimated a total GC population and specific frequency of 6000$\pm$1100 and $S_N$=7.4$\pm$1.4, respectively. Regarding NGC 1395 itself, the analysis of the deep Gemini/GMOS images shows a low surface brightness umbrella-like structure indicating, at least, one recent merger event. Through relations recently published in the literature, we obtained global parameters, such as $M_\mathrm{stellar}=9.32\times10^{11}$ M$\odot$ and $M_h=6.46\times10^{13}$ M$\odot$. Using public spectroscopic data, we derive stellar population parameters of the central region of the galaxy by the full spectral fitting technique. We have found that, this region, seems to be dominated for an old stellar population, in contrast to findings of young stellar populations from the literature., Comment: 19 pages, 22 figures

Published
2017
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18. Understanding the origin of early-type dwarfs: the spectrophotometric study of CGCG014−074.

Author

Guevara, N, Escudero, C G, and Faifer, F R

Subjects
DISK galaxies, STAR formation, GALAXY formation, STELLAR populations, DARK matter, GALAXY clusters
Abstract

Early-type dwarf galaxies constitute a prevalent population in the central regions of rich groups and clusters in the local Universe. These low-luminosity and low-mass stellar systems play a fundamental role in the assembly of the luminous galaxies observed today, according to the Lambda cold dark matter hierarchical theory. The origin of early-type dwarfs has been linked to the transformation of disc galaxies interacting with the intracluster medium, especially in dense environments. However, the existence of low-luminosity early-type galaxies in low-density environments presents a challenge to this scenario. This study presents a comprehensive photometric and spectroscopic analysis of the early-type dwarf galaxy CGCG014−074 using deep Gemini GMOS (Gemini Multi-Object Spectrograph) data, focusing on its peculiarities and evolutionary implications. CGCG014−074 exhibits distinct features, including a rotating inner disc, an extended stellar formation with a quiescent phase since about 2 Gyr ago, and the presence of boxy isophotes. From the kinematic analysis, we confirm CGCG014−074 as a nucleated early-type dwarf galaxy with embedded disc. The study of its stellar population parameters using different methods provides significant insights into the galaxy's evolutionary history. These results show an old and metal-poor nucleus (⁠|${\sim}9.3$| Gyr and |$\mathrm{[Z/H]}\sim -0.84$| dex), while the stellar disc is younger (⁠|${\sim}4.4$| Gyr) with a higher metallicity (⁠|$\mathrm{[Z/H]}\sim -0.40$| dex). These distinctive features collectively position CGCG014−074 as a likely building block galaxy that has evolved passively throughout its history. [ABSTRACT FROM AUTHOR]

Published
2024
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19. Nearest Neighbors-Based Forecasting for Electricity Demand Time Series in Streaming

Author

Melgar-García, L., Gutiérrez-Avilés, D., Rubio-Escudero, C., Troncoso, A., Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Alba, Enrique, editor, Luque, Gabriel, editor, Chicano, Francisco, editor, Cotta, Carlos, editor, Camacho, David, editor, Ojeda-Aciego, Manuel, editor, Montes, Susana, editor, Troncoso, Alicia, editor, Riquelme, José, editor, and Gil-Merino, Rodrigo, editor

Published
2021
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20. Implementation of an Internal Quality Assurance System at Pablo de Olavide University of Seville: Improving Computer Science Students Skills

Author

Rubio-Escudero, C., Martínez-Álvarez, F., Atencia-Gil, E., Troncoso, A., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Martínez Álvarez, Francisco, editor, Troncoso Lora, Alicia, editor, Sáez Muñoz, José António, editor, Quintián, Héctor, editor, and Corchado, Emilio, editor

Published
2020
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21. Stellar Systems in the direction of the Hickson Compact Group 44 - I. Low Surface Brightness Galaxies

Author

Castelli, A. V. Smith, Faifer, F. R., and Escudero, C. G.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Context. In spite of the numerous studies of low-luminosity galaxies in different environments, there is still no consensus about their formation scenario. In particular, a large number of galaxies displaying extremely low-surface brightnesses have been detected in the last year, and the nature of these objects is under discussion. Aims. In this paper we report the detection of two extended low-surface brightness (LSB) objects (mueff_g'~27 mag) found, in projection, next to NGC 3193 and in the zone of the Hickson Compact Group (HCG) 44, respectively. Methods. We analyzed deep, high-quality, GEMINI-GMOS images with ELLIPSE within IRAF in order to obtain their brightness profiles and structural parameters. We also search for the presence of globular clusters (GC) in these fields. Results. We have found that, if these LSB galaxies were at the distances of NGC 3193 and HCG 44, they would show sizes and luminosities similar to those of the ultra-diffuse galaxies (UDGs) found in the Coma cluster and other associations. In that case, their sizes would be rather larger than those displayed by the Local Group dwarf spheroidal (dSph) galaxies. We have detected a few unresolved sources in the sky zone occupied by these galaxies showing colors and brightnesses typical of blue globular clusters. Conclusions. From the comparison of the properties of the galaxies presented in this work, with those of similar objects reported in the literature, we have found that LSB galaxies display sizes covering a quite extended continous range (reff ~ 0.3 - 4.5 kpc), in contrast to "normal" early-type galaxies, which shows reff ~ 1.0 kpc with a low dispersion. This fact might be pointing to different formation processes for both types of galaxies., Comment: 9 pages, 7 figures, accepted for publication in A&A

Published
2016
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22. Diffusion in an expanding medium: Fokker-Planck equation, Green's function and first-passage properties

Author

Yuste, S. B., Abad, E., and Escudero, C.

Subjects
Condensed Matter - Statistical Mechanics, Mathematical Physics
Abstract

We present a classical, mesoscopic derivation of the Fokker-Planck equation for diffusion in an expanding medium. To this end, we take a conveniently generalized Chapman-Kolmogorov equation as the starting point. We obtain an analytical expression for the Green's function (propagator) and investigate both analytically and numerically how this function and the associated moments behave. We also study first-passage properties in expanding hyperspherical geometries. We show that in all cases the behavior is determined to a great extent by the so-called Brownian conformal time $\tau(t)$, which we define via the relation $\dot \tau=1/a^2$, where $a(t)$ is the expansion scale factor. If the medium expansion is driven by a power law [$a(t) \propto t^\gamma$ with $\gamma>0$], we find interesting crossover effects in the mixing effectiveness of the diffusion process when the characteristic exponent $\gamma$ is varied. Crossover effects are also found at the level of the survival probability and of the moments of the first passage-time distribution with two different regimes separated by the critical value $\gamma=1/2$. The case of an exponential scale factor is analyzed separately both for expanding and contracting media. In the latter situation, a stationary probability distribution arises in the long time limit., Comment: 33 pages, 8 figs

Published
2016
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26. Impact of Auto-evaluation Tests as Part of the Continuous Evaluation in Programming Courses

Author

Rubio-Escudero, C., Asencio-Cortés, G., Martínez-Álvarez, F., Troncoso, A., Riquelme, J. C., Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Graña, Manuel, editor, López-Guede, José Manuel, editor, Etxaniz, Oier, editor, Herrero, Álvaro, editor, Sáez, José Antonio, editor, Quintián, Héctor, editor, and Corchado, Emilio, editor

Published
2019
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31. Measurement of J/psi production in pp collisions at sqrt(s)=7 TeV

Author

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Appleby, R. B., Gutierrez, O. Aquines, Arrabito, L., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Bailey, D. S., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Bates, A., Bauer, C., Bauer, Th., Bay, A., Bediaga, I., Belous, K., Belyaev, I., Ben-Haim, E., Benayoun, M., Bencivenni, G., Bernet, R., Bettler, M. -O., van Beuzekom, M., Bifani, S., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bos, E., Bowcock, T. J. V., Bozzi, C., Brambach, T., Brand, J. van den, Bressieux, J., Brisbane, S., Britsch, M., Britton, T., Brook, N. H., Brown, H., Büchler-Germann, A., Bursche, A., Buytaert, J., Cadeddu, S., Carvajal, J. M. Caicedo, Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Campana, P., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Charles, M., Charpentier, Ph., Chiapolini, N., Vidal, X. Cid, Clark, P. J., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Constantin, F., Conti, G., Contu, A., Coombes, M., Corti, G., Cowan, G. A., Currie, R., D'Almagne, B., D'Ambrosio, C., Da Silva, W., David, P., De Bonis, I., De Capua, S., De Cian, M., De Lorenzi, F., De Miranda, J. M., De Paula, L., De Simone, P., Decamp, D., Degaudenzi, H., Deissenroth, M., Del Buono, L., Deplano, C., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Dima, M., Batista, P. Diniz, Donleavy, S., Dossett, D., Dovbnya, A., Dupertuis, F., Dzhelyadin, R., Eames, C., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisele, F., Eisenhardt, S., Eklund, L., d'Enterria, D. G., Pereira, D. Esperante, Estève, L., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Albor, V. Fernandez, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Fontanelli, F., Forty, R., Frank, M., Frei, C., Frosini, M., Pazos, J. L. Fungueirino, Furcas, S., Torreira, A. Gallas, Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garnier, J-C., Garofoli, J., Garrido, L., Gaspar, C., Gauvin, N., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gordon, H., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Gregson, S., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Haefeli, G., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, P. F., He, J., Hennessy, K., Henrard, P., Morata, J. A. Hernando, van Herwijnen, E., Hicheur, A., Hicks, E., Hofmann, W., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Iakovenko, V., Escudero, C. Iglesias, Ilten, P., Imong, J., Jacobsson, R., Hussein, M. Jahjah, Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., Jing, F., John, M., Johnson, D., Jones, C. R., Jost, B., Kapusta, F., Karbach, T. M., Keaveney, J., Kerzel, U., Ketel, T., Keune, A., Khanji, B., Kim, Y. M., Knecht, M., Koblitz, S., Konoplyannikov, A., Koppenburg, P., Kozlinskiy, A., Kravchuk, L., Krocker, G., Krokovny, P., Kruse, F., Kruzelecki, K., Kucharczyk, M., Kukulak, S., Kumar, R., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Latham, T., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Li, L., Li, Y. Y., Gioi, L. Li, Lieng, M., Liles, M., Lindner, R., Linn, C., Liu, B., Liu, G., Lopes, J. H., Asamar, E. Lopez, Lopez-March, N., Luisier, J., M'charek, B., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Magnin, J., Maier, A., Malde, S., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Sánchez, A. Martín, Santos, D. Martinez, Massafferri, A., Mathe, Z., Matteuzzi, C., Matveev, M., Matveev, V., Maurice, E., Maynard, B., Mazurov, A., McGregor, G., McNulty, R., Mclean, C., Meissner, M., Merk, M., Merkel, J., Merkin, M., Messi, R., Miglioranzi, S., Milanes, D. A., Minard, M. -N., Monteil, S., Moran, D., Morawski, P., Morris, J. V., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Murtas, F., Muryn, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nardulli, J., Nedos, M., Needham, M., Neufeld, N., Nicol, M., Nies, S., Niess, V., Nikitin, N., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Ostankov, A., Pal, B., Palacios, J., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Patrignani, C., Pavel-Nicorescu, C., Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Trigo, E. Perez, Yzquierdo, A. Pérez-Calero, Perret, P., Petrella, A., Petrolini, A., Valls, B. Pie, Pietrzyk, B., Pinci, D., Plackett, R., Playfer, S., Casasus, M. Plo, Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Potterat, C., Powell, A., Pree, T. du, Pugatch, V., Navarro, A. Puig, Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Raniuk, I., Raven, G., Redford, S., Reece, W., Reis, A. C. dos, Ricciardi, S., Rinnert, K., Romero, D. A. Roa, Robbe, P., Rodrigues, E., Rodrigues, F., Cobo, C. Rodriguez, Perez, P. Rodriguez, Rogers, G. J., Romanovsky, V., Rouvinet, J., Ruf, T., Ruiz, H., Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Salzmann, C., Varela, A. Sambade, Sannino, M., Santacesaria, R., Santinelli, R., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Serra, N., Serrano, J., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Simioni, E., Skottowe, H. P., Skwarnicki, T., Smith, A. C., Sobczak, K., Soler, F. J. P., Solomin, A., Somogy, P., Soomro, F., De Paula, B. Souza, Spaan, B., Sparkes, A., Spiridenkov, E., Spradlin, P., Stagni, F., Steinkamp, O., Stenyakin, O., Stoica, S., Stone, S., Storaci, B., Straumann, U., Styles, N., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Talanov, V., Teodorescu, E., Terrier, H., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Topp-Joergensen, S., Tran, M. T., Tsaregorodtsev, A., Tuning, N., Ukleja, A., Urquijo, P., Uwer, U., Vagnoni, V., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Vervink, K., Viaud, B., Videau, I., Vilasis-Cardona, X., Visniakov, J., Vollhardt, A., Voong, D., Vorobyev, A., Vorobyev, An., Voss, H., Wacker, K., Wandernoth, S., Wang, J., Ward, D. R., Webber, A. D., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Witzeling, W., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Yang, Z., Smit, G. Ybeles, Young, R., Yushchenko, O., Zavertyaev, M., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhong, L., and Zverev, E.

Subjects
High Energy Physics - Experiment
Abstract

The production of J/psi mesons in proton-proton collisions at sqrt(s)=7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum pT and rapidity y in the fiducial region 0

Published
2011
Full Text
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32. First observation of Bs -> D_{s2}^{*+} X mu nu decays

Author

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Agari, M., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Nobrega, R. Antunes, Appleby, R. B., Gutierrez, O. Aquines, Arefyev, A., Arrabito, L., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Bailey, D. S., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Basiladze, S., Bates, A., Bauer, C., Bauer, Th., Bay, A., Bediaga, I., Belous, K., Belyaev, I., Benayoun, M., Bencivenni, G., Bernet, R., Bettler, M. -O., van Beuzekom, M., Bifani, S., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bochin, B., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bos, E., Bowcock, T. J. V., Bozzi, C., Brambach, T., Brand, J. van den, Bressieux, J., Brisbane, S., Britsch, M., Britton, T., Brook, N. H., Brown, H., Büchler-Germann, A., Bursche, A., Buytaert, J., Cadeddu, S., Carvajal, J. M. Caicedo, Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Cameron, W., Camilleri, L., Campana, P., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Charles, M., Charpentier, Ph., Cheng, J., Chiapolini, N., Chlopik, A., Christiansen, J., Ciambrone, P., Vidal, X. Cid, Clark, P. J., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Constantin, F., Conti, G., Contu, A., Coombes, M., Corti, G., Cowan, G. A., Currie, R., D'Almagne, B., D'Ambrosio, C., D'Antone, I., Da Silva, W., Dane', E., David, P., De Bonis, I., De Capua, S., De Cian, M., De Lorenzi, F., De Miranda, J. M., De Paula, L., De Simone, P., Decamp, D., Degaudenzi, H., Deissenroth, M., Del Buono, L., Deplano, C., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Dima, M., Donleavy, S., Dornan, P., Dossett, D., Dovbnya, A., Dupertuis, F., Dzhelyadin, R., Eames, C., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisele, F., Eisenhardt, S., Eklund, L., d'Enterria, D. G., Pereira, D. Esperante, Estève, L., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Albor, V. Fernandez, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Flegel, W., Fontanelli, F., Forty, R., Frank, M., Frei, C., Frosini, M., Pazos, J. L. Fungueirino, Furcas, S., Torreira, A. Gallas, Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garnier, J-C., Garofoli, J., Garrido, L., Gaspar, C., Gassner, J., Gauvin, N., Gavillet, P., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gong, G., Gong, H., Gordon, H., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Gregson, S., Gui, B., Gushchin, E., Guz, Yu., Guzik, Z., Gys, T., Haefeli, G., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, P. F., He, J., Hennessy, K., Henrard, P., Morata, J. A. Hernando, van Herwijnen, E., Hicheur, A., Hicks, E., Hilke, H. J., Hofmann, W., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Iakovenko, V., Escudero, C. Iglesias, Ilgner, C., Ilten, P., Imong, J., Jacobsson, R., Hussein, M. Jahjah, Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., Jing, F., John, M., Johnson, D., Jones, C. R., Jost, B., Kapusta, F., Karbach, T. M., Kashchuk, A., Keaveney, J., Kerzel, U., Ketel, T., Keune, A., Khanji, B., Kim, Y. M., Knecht, M., Koblitz, S., Konoplyannikov, A., Koppenburg, P., Korolev, M., Kozlinskiy, A., Kravchuk, L., Krocker, G., Krokovny, P., Kruse, F., Kruzelecki, K., Kucharczyk, M., Kukulak, S., Kumar, R., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Latham, T., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Lehner, F., Leroy, O., Lesiak, T., Li, L., Li, Y. Y., Gioi, L. Li, Libby, J., Lieng, M., Liles, M., Lindner, R., Linn, C., Liu, B., Liu, G., Löchner, S., Lopes, J. H., Asamar, E. Lopez, Lopez-March, N., Luisier, J., M'charek, B., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Magnin, J., Maier, A., Malde, S., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Sanchez, A. Martin, Santos, D. Martinez, Massafferri, A., Mathe, Z., Matteuzzi, C., Matveev, M., Matveev, V., Maurice, E., Maynard, B., Mazurov, A., McGregor, G., McNulty, R., Mclean, C., Meissner, M., Merk, M., Merkel, J., Merkin, M., Messi, R., Miglioranzi, S., Milanes, D. A., Minard, M. -N., Monteil, S., Moran, D., Morawski, P., Morris, J. V., Moscicki, J., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Murtas, F., Muryn, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nardulli, J., Nawrot, A., Nedos, M., Needham, M., Neufeld, N., Neustroev, P., Nicol, M., Nies, S., Niess, V., Nikitin, N., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Ostankov, A., Pal, B., Palacios, J., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Patrignani, C., Pauna, E., Pauna, C., Pavel, C., Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Trigo, E. Perez, Yzquierdo, A. Pérez-Calero, Perret, P., Pessina, G., Petrella, A., Petrolini, A., Valls, B. Pie, Pietrzyk, B., Pinci, D., Plackett, R., Playfer, S., Casasus, M. Plo, Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Potterat, C., Powell, A., Pozzi, S., Pree, T. du, Pugatch, V., Navarro, A. Puig, Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Raniuk, I., Raven, G., Redford, S., Reece, W., Reis, A. C. dos, Ricciardi, S., Rinnert, K., Romero, D. A. Roa, Robbe, P., Rodrigues, E., Rodrigues, F., Cobo, C. Rodriguez, Perez, P. Rodriguez, Rogers, G. J., Romanovsky, V., Rouvinet, J., Ruf, T., Ruiz, H., Rusinov, V., Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Salzmann, C., Varela, A. Sambade, Sannino, M., Santacesaria, R., Santinelli, R., Santovetti, E., Sapunov, M., Saputi, A., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schmelling, M., Schmidt, B., Schneider, O., Schneider, T., Schopper, A., Schune, M. -H., Schwemmer, R., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Serra, N., Serrano, J., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Simioni, E., Skottowe, H. P., Skwarnicki, T., Smale, N., Smith, A., Smith, A. C., Sobczak, K., Soler, F. J. P., Solomin, A., Somogy, P., Soomro, F., De Paula, B. Souza, Spaan, B., Sparkes, A., Spiridenkov, E., Spradlin, P., Srednicki, A., Stagni, F., Steiner, S., Steinkamp, O., Stenyakin, O., Stoica, S., Stone, S., Storaci, B., Straumann, U., Styles, N., Szczekowski, M., Szczypka, P., Szumlak, T, T'Jampens, S., Talanov, V., Tarkovskiy, E., Teodorescu, E., Terrier, H., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Topp-Joergensen, S., Tran, M. T., Traynor, S., Trunk, U., Tsaregorodtsev, A., Tuning, N., Ukleja, A., Urquijo, P., Uwer, U., Vagnoni, V., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Vervink, K., Viaud, B., Videau, I., Vilasis-Cardona, X., Visniakov, J., Vollhardt, A., Voong, D., Vorobyev, A., Vorobyev, An., Voss, H., Wacker, K., Wandernoth, S., Wang, J., Ward, D. R., Webber, A. D., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Witzeling, W., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Yang, Z., Smit, G. Ybeles, Young, R., Yushchenko, O., Zavertyaev, M., Zeng, M., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhong, L., and Zverev, E.

Subjects
High Energy Physics - Experiment
Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays Bs -> Ds+ X mu nu and Bs -> D0 K+ X mu nu are detected. Two structures are observed in the D0 K+ mass spectrum at masses consistent with the known D^+_{s1}(2536) and $D^{*+}_{s2}(2573) mesons. The measured branching fractions relative to the total Bs semileptonic rate are B(Bs -> D_{s2}^{*+} X mu nu)/B(Bs -> X mu nu)= (3.3\pm 1.0\pm 0.4)%, and B(Bs -> D_{s1}^+ X munu)/B(Bs -> X mu nu)= (5.4\pm 1.2\pm 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D_{s2}^{*+} state in Bs decays; we also measure its mass and width., Comment: 8 pages 2 figures. Published in Physics Letters B

Published
2011
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33. First observation of Bs -> J/psi f0(980) decays

Author

The LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Appleby, R. B., Gutierrez, O. Aquines, Arrabito, L., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Bailey, D. S., Balagura, V., Baldini, W., Barlow, R. J., Barschel, C., Barsuk, S., Bates, A., Bauer, C., Bauer, Th., Bay, A., Bediaga, I., Belous, K., Belyaev, I., Ben-Haim, E., Benayoun, M., Bencivenni, G., Bernet, R., Bettler, M. -O., van Beuzekom, M., Bifani, S., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bos, E., Bowcock, T. J. V., Bozzi, C., Brambach, T., Brand, J. van den, Bressieux, J., Brisbane, S., Britsch, M., Britton, T., Brook, N. H., Brown, H., Büchler-Germann, A., Bursche, A., Buytaert, J., Cadeddu, S., Carvajal, J. M. Caicedo, Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Camilleri, L., Campana, P., Capon, G., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Charles, M., Charpentier, Ph., Chiapolini, N., Vidal, X. Cid, Clark, P. J., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Constantin, F., Conti, G., Contu, A., Coombes, M., Corti, G., Cowan, G. A., Currie, R., D'Almagne, B., D'Ambrosio, C., Da Silva, W., David, P., De Bonis, I., De Capua, S., De Cian, M., De Lorenzi, F., De Miranda, J. M., De Paula, L., De Simone, P., Decamp, D., Degaudenzi, H., Deissenroth, M., Del Buono, L., Deplano, C., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Dima, M., Batista, P. Diniz, Donleavy, S., Dossett, D., Dovbnya, A., Dupertuis, F., Dzhelyadin, R., Eames, C., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisele, F., Eisenhardt, S., Eklund, L., d'Enterria, D. G., Pereira, D. Esperante, Estève, L., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Albor, V. Fernandez, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Fontanelli, F., Forty, R., Frank, M., Frei, C., Frosini, M., Pazos, J. L. Fungueirino, Furcas, S., Torreira, A. Gallas, Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garnier, J-C., Garofoli, J., Garrido, L., Gaspar, C., Gauvin, N., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gordon, H., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Gregson, S., Gui, B., Gushchin, E., Guz, Yu., Gys, T., Haefeli, G., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, P. F., He, J., Hennessy, K., Henrard, P., Morata, J. A. Hernando, van Herwijnen, E., Hicheur, A., Hicks, E., Hofmann, W., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Iakovenko, V., Escudero, C. Iglesias, Ilten, P., Imong, J., Jacobsson, R., Hussein, M. Jahjah, Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., Jing, F., John, M., Johnson, D., Jones, C. R., Jost, B., Kapusta, F., Karbach, T. M., Keaveney, J., Kerzel, U., Ketel, T., Keune, A., Khanji, B., Kim, Y. M., Knecht, M., Koblitz, S., Konoplyannikov, A., Koppenburg, P., Kozlinskiy, A., Kravchuk, L., Krocker, G., Krokovny, P., Kruse, F., Kruzelecki, K., Kucharczyk, M., Kukulak, S., Kumar, R., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Latham, T., Gac, R. Le, van Leerdam, J., Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Leroy, O., Lesiak, T., Li, L., Li, Y. Y., Gioi, L. Li, Lieng, M., Liles, M., Lindner, R., Linn, C., Liu, B., Liu, G., Lopes, J. H., Asamar, E. Lopez, Lopez-March, N., Luisier, J., M'charek, B., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Magnin, J., Maier, A., Malde, S., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Sanchez, A. Martin, Santos, D. Martinez, Massafferri, A., Mathe, Z., Matteuzzi, C., Matveev, M., Matveev, V., Maurice, E., Maynard, B., Mazurov, A., McGregor, G., McNulty, R., Mclean, C., Meissner, M., Merk, M., Merkel, J., Merkin, M., Messi, R., Miglioranzi, S., Milanes, D. A., Minard, M. -N., Monteil, S., Moran, D., Morawski, P., Morris, J. V., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Murtas, F., Muryn, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nardulli, J., Nedos, M., Needham, M., Neufeld, N., Nicol, M., Nies, S., Niess, V., Nikitin, N., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Ostankov, A., Pal, B., Palacios, J., Palutan, M., Panman, J., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Patrignani, C., -Nicorescu, C. Pavel, Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Trigo, E. Perez, Yzquierdo, A. Pérez-Calero, Perret, P., Petrella, A., Petrolini, A., Valls, B. Pie, Pietrzyk, B., Pinci, D., Plackett, R., Playfer, S., Casasus, M. Plo, Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Potterat, C., Powell, A., Pree, T. du, Pugatch, V., Navarro, A. Puig, Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Raniuk, I., Raven, G., Redford, S., Reece, W., Reis, A. C. dos, Ricciardi, S., Rinnert, K., Romero, D. A. Roa, Robbe, P., Rodrigues, E., Rodrigues, F., Cobo, C. Rodriguez, Perez, P. Rodriguez, Rogers, G. J., Romanovsky, V., Rouvinet, J., Ruf, T., Ruiz, H., Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Salzmann, C., Varela, A. Sambade, Sannino, M., Santacesaria, R., Santinelli, R., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Serra, N., Serrano, J., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, O., Shevchenko, V., Shires, A., Simioni, E., Skottowe, H. P., Skwarnicki, T., Smith, A. C., Sobczak, K., Soler, F. J. P., Solomin, A., Somogy, P., Soomro, F., De Paula, B. Souza, Spaan, B., Sparkes, A., Spiridenkov, E., Spradlin, P., Stagni, F., Steinkamp, O., Stenyakin, O., Stoica, S., Stone, S., Storaci, B., Straumann, U., Styles, N., Szczekowski, M., Szczypka, P., Szumlak, T, T'Jampens, S., Talanov, V., Teodorescu, E., Terrier, H., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Topp-Joergensen, S., Tran, M. T., Tsaregorodtsev, A., Tuning, N., Ukleja, A., Urquijo, P., Uwer, U., Vagnoni, V., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Vervink, K., Viaud, B., Videau, I., Vilasis-Cardona, X., Visniakov, J., Vollhardt, A., Voong, D., Vorobyev, A., Vorobyev, An., Voss, H., Wacker, K., Wandernoth, S., Wang, J., Ward, D. R., Webber, A. D., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Witzeling, W., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Yang, Z., Smit, G. Ybeles, Young, R., Yushchenko, O., Zavertyaev, M., Zhang, L., Zhang, W. C., Zhang, Y., Zhelezov, A., Zhong, L., and Zverev, E.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay Bs -> J/psi f0(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the B_s system. Using a fit to the pi+ pi- mass spectrum with interfering resonances gives R_{f0/phi} = [Gamma(Bs -> J/psi f0, f0 -> pi+ pi-)]/[Gamma(Bs -> J/psi phi, phi -> K+K-)] = 0.252^{+0.046+0.027}_{-0.032-0.033}, where the uncertainties are statistical and systematic, respectively., Comment: 11 pages, 6 figures. To be published in Physics Letters B

Published
2011
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34. Measurement of sigma(pp -> b anti-b X) at \sqrt(s)=7 TeV in the forward region

Author

LHCb Collaboration, Aaij, R., Beteta, C. Abellan, Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Agari, M., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Alfonsi, M., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Nobrega, R. Antunes, Appleby, R., Gutierrez, O. Aquines, Arefyev, A., Arrabito, L., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Bagaturia, Y., Bailey, D. S., Balagura, V., Baldini, W., Barber, G., Barham, C., Barlow, R. J., Barsuk, S., Basiladze, S., Bates, A., Bauer, C., Bauer, Th., Bay, A., Bediaga, I., Bellunato, T., Belous, K., Belyaev, I., Benayoun, M., Bencivenni, G., Bernet, R., Bernhard, R. P., Bettler, M. -O., van Beuzekom, M., Bibby, J. H., Bifani, S., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bochin, B., Bonaccorsi, E., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bos, E., Bowcock, T. J. V., Bozzi, C., Brambach, T., Brand, J. van den, Brarda, L., Bressieux, J., Brisbane, S., Britsch, M., Brook, N. H., Brown, H., Brusa, S., Büchler-Germann, A., Bursche, A., Buytaert, J., Cadeddu, S., Carvajal, J. M. Caicedo, Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Cameron, W., Camilleri, L., Campana, P., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carroll, J., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Chadaj, B., Charles, M., Charpentier, Ph., Cheng, J., Chiapolini, N., Chlopik, A., Christiansen, J., Ciambrone, P., Vidal, X. Cid, Clark, P. J., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Comerma-Montells, A., Constantin, F., Conti, G., Contu, A., Cooke, P., Coombes, M., Corajod, B., Corti, G., Cowan, G. A., Currie, R., D'Almagne, B., D'Ambrosio, C., D'Antone, I., Da Silva, W., Dane', E., David, P., De Bonis, I., De Capua, S., De Cian, M., De Lorenzi, F., De Miranda, J. M., De Paula, L., De Simone, P., Decamp, D., Decreuse, G., Degaudenzi, H., Deissenroth, M., Del Buono, L., Densham, C. J., Deplano, C., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Dima, M., Donleavy, S., Dornan, P., Dossett, D., Dovbnya, A., Dumps, R., Dupertuis, F., Dwyer, L., Dzhelyadin, R., Eames, C., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisele, F., Eisenhardt, S., Eklund, L., d'Enterria, D. G., Pereira, D. Esperante, Estève, L., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Felici, G., Albor, V. Fernandez, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Flegel, W., Fontanelli, F., Forti, C., Forty, R., Fournier, C., Franek, B., Frank, M., Frei, C., Frosini, M., Pazos, J. L. Fungueirino, Furcas, S., Torreira, A. Gallas, Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garnier, J-C., Garrido, L., Gascon, D., Gaspar, C., Cue, A. Gaspar De Valenzuela, Gassner, J., Gauvin, N., Gavillet, P., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gong, G., Gong, H., Gordon, H., Gándara, M. Grabalosa, Gracco, V., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Gregson, S., Guerrer, G., Gui, B., Gushchin, E., Guz, Yu., Guzik, Z., Gys, T., Haefeli, G., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, P. F., He, J., Hennessy, K., Henrard, P., Morata, J. A. Hernando, van Herwijnen, E., Hicheur, A., Hicks, E., Hilke, H. J., Hofmann, W., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Iacoangeli, F., Iakovenko, V., Escudero, C. Iglesias, Ilgner, C., Ilten, P., Imong, J., Jacobsson, R., Hussein, M. Jahjah, Jamet, O., Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., John, M., Johnson, D., Jones, C. R., Jost, B., Kapusta, F., Karbach, T. M., Kashchuk, A., Katvars, S., Keaveney, J., Kerzel, U., Ketel, T., Keune, A., Khalil, S., Khanji, B., Kim, Y. M., Knecht, M., Koblitz, S., Konoplyannikov, A., Koppenburg, P., Korolev, M., Kozlinskiy, A., Kravchuk, L., Kristic, R., Krocker, G., Krokovny, P., Kruse, F., Kruzelecki, K., Kucharczyk, M., Kudryashov, I., Kukulak, S., Kumar, R., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lafferty, G., Lai, A., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Latham, T., Gac, R. Le, Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Lehner, F., Lenzi, M., Leroy, O., Lesiak, T., Li, L., Li, Y. Y., Gioi, L. Li, Libby, J., Lieng, M., Lindner, R., Lindsay, S., Linn, C., Liu, B., Liu, G., Löchner, S., Lopes, J. H., Asamar, E. Lopez, Lopez-March, N., Loveridge, P., Luisier, J., M'charek, B., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Magnin, J., Maier, A., Malde, S., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Santos, D. Martinez, Massafferri, A., Mathe, Z., Matteuzzi, C., Matveev, V., Maurice, E., Maynard, B., Mazurov, A., McGregor, G., McNulty, R., Mclean, C., Merk, M., Merkel, J., Merkin, M., Messi, R., Miglioranzi, S., Minard, M. -N., Moine, G., Monteil, S., Moran, D., Morant, J., Morawski, P., Morris, J. V., Moscicki, J., Mountain, R., Mous, I., Muheim, F., Müller, K., Muresan, R., Murtas, F., Muryn, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nardulli, J., Nawrot, A., Nedos, M., Needham, M., Neufeld, N., Neustroev, P., Nicol, M., Nicolas, L., Nies, S., Niess, V., Nikitin, N., Noor, A., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Ostankov, A., Pal, B., Palacios, J., Palutan, M., Panman, J., Papadelis, A., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Patrignani, C., Pauna, E., Pauna, C., Pavel, C., Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Trigo, E. Perez, Yzquierdo, A. Pérez-Calero, Perret, P., Pessina, G., Petrella, A., Petrolini, A., Olloqui, E. Picatoste, Valls, B. Pie, Piedigrossi, D., Pietrzyk, B., Pinci, D., Playfer, S., Casasus, M. Plo, Poli-Lener, M., Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Poss, S., Potterat, C., Powell, A., Pozzi, S., Pree, T. du, Pugatch, V., Navarro, A. Puig, Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Raniuk, I., Raven, G., Redford, S., Reece, W., Reis, A. C. dos, Ricciardi, S., Riera, J., Rinnert, K., Romero, D. A. Roa, Robbe, P., Rodrigues, E., Rodrigues, F., Cobo, C. Rodriguez, Perez, P. Rodriguez, Rogers, G. J., Romanovsky, V., Sanabria, E. Rondan, Rosello, M., Rouvinet, J., Roy, L., Ruf, T., Ruiz, H., Rummel, C., Rusinov, V., Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Sakhelashvili, T., Salzmann, C., Varela, A. Sambade, Sannino, M., Santacesaria, R., Santinelli, R., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savidge, T., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schmelling, M., Schmidt, B., Schneider, O., Schneider, T., Schopper, A., Schune, M. -H., Schwemmer, R., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Serra, N., Serrano, J., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Sigurdsson, S., Simioni, E., Skottowe, H. P., Skwarnicki, T., Smale, N., Smith, A., Smith, A. C., Smith, N. A., Sobczak, K., Soler, F. J. P., Solomin, A., Somogy, P., Soomro, F., De Paula, B. Souza, Spaan, B., Sparkes, A., Spiridenkov, E., Spradlin, P., Srednicki, A., Stagni, F., Stahl, S., Steiner, S., Steinkamp, O., Stenyakin, O., Stoica, S., Stone, S., Storaci, B., Straumann, U., Styles, N., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Tarkovskiy, E., Teodorescu, E., Terrier, H., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Topp-Joergensen, S., Tran, M. T., Traynor, S., Trunk, U., Tsaregorodtsev, A., Tuning, N., Ukleja, A., Ullaland, O., Urquijo, P., Uwer, U., Vagnoni, V., Valenti, G., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Vervink, K., Viaud, B., Videau, I., Vilasis-Cardona, X., Visniakov, J., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, An., Voss, H., Wacker, K., Wandernoth, S., Wang, J., Ward, D. R., Webber, A. D., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Witzeling, W., Woodward, M. L., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Yang, Z., Smit, G. Ybeles, Young, R., Yushchenko, O., Zeng, M., Zhang, L., Zhang, Y., Zhelezov, A., and Zverev, E.

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In the pseudorapidity interval 2 < eta < 6 and integrated over all transverse momenta we find that the average cross-section to produce b-flavoured or anti-b-flavoured hadrons is (75.3 +/- 5.4 +/- 13.0) microbarns., Comment: 11 pages, 5 figures, to be published in Physics Lett. B; v2 minor changes

Published
2010
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35. Prompt K_short production in pp collisions at sqrt(s)=0.9 TeV

Author

LHCb Collaboration, Aaij, R., Beteta, C. Abellan, Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Agari, M., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Alfonsi, M., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Nobrega, R. Antunes, Appleby, R., Gutierrez, O. Aquines, Arefyev, A., Arrabito, L., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Bagaturia, Y., Bailey, D. S., Balagura, V., Baldini, W., Barber, G., Barham, C., Barlow, R. J., Barsuk, S., Basiladze, S., Bates, A., Bauer, C., Bauer, Th., Bay, A., Bediaga, I., Bellunato, T., Belous, K., Belyaev, I., Benayoun, M., Bencivenni, G., Bernet, R., Bernhard, R. P., Bettler, M. -O., van Beuzekom, M., Bibby, J. H., Bifani, S., Bizzeti, A., Bjørnstad, P. M., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bochin, B., Bonaccorsi, E., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bos, E., Bowcock, T. J. V., Bozzi, C., Brambach, T., Brand, J. van den, Brarda, L., Bressieux, J., Brisbane, S., Britsch, M., Brook, N. H., Brown, H., Brusa, S., Büchler-Germann, A., Bursche, A., Buytaert, J., Cadeddu, S., Carvajal, J. M. Caicedo, Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Cameron, W., Camilleri, L., Campana, P., Carbone, A., Carboni, G., Cardinale, R., Cardini, A., Carroll, J., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Chadaj, B., Charles, M., Charpentier, Ph., Cheng, J., Chiapolini, N., Chlopik, A., Christiansen, J., Ciambrone, P., Vidal, X. Cid, Clark, P. J., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Comerma-Montells, A., Constantin, F., Conti, G., Contu, A., Cooke, P., Coombes, M., Corajod, B., Corti, G., Cowan, G. A., Currie, R., D'Almagne, B., D'Ambrosio, C., D'Antone, I., Da Silva, W., Dane', E., David, P., De Bonis, I., De Capua, S., De Cian, M., De Lorenzi, F., De Miranda, J. M., De Paula, L., De Simone, P., Decamp, D., Decreuse, G., Degaudenzi, H., Deissenroth, M., Del Buono, L., Densham, C. J., Deplano, C., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Dima, M., Donleavy, S., Dornan, P., Dossett, D., Dovbnya, A., Dumps, R., Dupertuis, F., Dwyer, L., Dzhelyadin, R., Eames, C., Easo, S., Egede, U., Egorychev, V., Eidelman, S., van Eijk, D., Eisele, F., Eisenhardt, S., Eklund, L., d'Enterria, D. G., Pereira, D. Esperante, Estève, L., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Felici, G., Albor, V. Fernandez, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Flegel, W., Fontanelli, F., Forti, C., Forty, R., Fournier, C., Franek, B., Frank, M., Frei, C., Frosini, M., Pazos, J. L. Fungueirino, Furcas, S., Torreira, A. Gallas, Galli, D., Gandelman, M., Gandini, P., Gao, Y., Garnier, J-C., Garrido, L., Gascon, D., Gaspar, C., Cue, A. Gaspar De Valenzuela, Gassner, J., Gauvin, N., Gavillet, P., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gilitsky, Yu., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gong, G., Gong, H., Gordon, H., Gándara, M. Grabalosa, Gracco, V., Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Gregson, S., Guerrer, G., Gui, B., Gushchin, E., Guz, Yu., Guzik, Z., Gys, T., Haefeli, G., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, P. F., He, J., Hennessy, K., Henrard, P., Morata, J. A. Hernando, van Herwijnen, E., Hicheur, A., Hicks, E., Hilke, H. J., Hofmann, W., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Iacoangeli, F., Iakovenko, V., Escudero, C. Iglesias, Ilgner, C., Imong, J., Jacobsson, R., Hussein, M. Jahjah, Jamet, O., Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., John, M., Johnson, D., Jones, C. R., Jost, B., Kapusta, F., Karbach, T. M., Kashchuk, A., Katvars, S., Keaveney, J., Kerzel, U., Ketel, T., Keune, A., Khalil, S., Khanji, B., Kim, Y. M., Knecht, M., Koblitz, S., Konoplyannikov, A., Koppenburg, P., Korolev, M., Kozlinskiy, A., Kravchuk, L., Kristic, R., Krocker, G., Krokovny, P., Kruse, F., Kruzelecki, K., Kucharczyk, M., Kudryashov, I., Kukulak, S., Kumar, R., Kvaratskheliya, T., La Thi, V. N., Lacarrere, D., Lai, A., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Latham, T., Gac, R. Le, Lees, J. -P., Lefèvre, R., Leflat, A., Lefrançois, J., Lehner, F., Lenzi, M., Leroy, O., Lesiak, T., Li, L., Li, Y. Y., Gioi, L. Li, Libby, J., Lieng, M., Lindner, R., Lindsey, S., Linn, C., Liu, B., Liu, G., Löchner, S., Lopes, J. H., Asamar, E. Lopez, Lopez-March, N., Loveridge, P., Luisier, J., M'charek, B., Machefert, F., Machikhiliyan, I. V., Maciuc, F., Maev, O., Magnin, J., Maier, A., Malde, S., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Märki, R., Marks, J., Martellotti, G., Martens, A., Martin, L., Santos, D. Martinez, Massaferri, A., Mathe, Z., Matteuzzi, C., Matveev, V., Maurice, E., Maynard, B., Mazurov, A., McGregor, G., McNulty, R., Mclean, C., Merk, M., Merkel, J., Merkin, M., Messi, R., Metlica, F. C. D., Miglioranzi, S., Minard, M. -N., Moine, G., Monteil, S., Moran, D., Morant, J., Morris, J. V., Moscicki, J., Mountain, R., Mous, I., Muheim, F., Muresan, R., Murtas, F., Muryn, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nardulli, J., Nawrot, A., Nedos, M., Needham, M., Neufeld, N., Neustroev, P., Nicol, M., Nicolas, L., Nies, S., Niess, V., Nikitin, N., Noor, A., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Ostankov, A., Palacios, J., Palutan, M., Panman, J., Papadelis, A., Papanestis, A., Pappagallo, M., Parkes, C., Parkinson, C. J., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Patrignani, C., Pauna, E., Pauna, C., Pavel, C., Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Trigo, E. Perez, Yzquierdo, A. Pérez-Calero, Perret, P., Pessina, G., Petrella, A., Petrolini, A., Olloqui, E. Picatoste, Valls, B. Pie, Piedigrossi, D., Pietrzyk, B., Pinci, D., Playfer, S., Casasus, M. Plo, Poli-Lener, M., Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Poss, S., Potterat, C., Powell, A., Pozzi, S., Pree, T. du, Pugatch, V., Navarro, A. Puig, Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Raniuk, I., Raven, G., Redford, S., Reece, W., Reis, A. C. dos, Ricciardi, S., Riera, J., Rinnert, K., Romero, D. A. Roa, Robbe, P., Rodrigues, E., Rodrigues, F., Cobo, C. Rodriguez, Perez, P. Rodriguez, Rogers, G. J., Romanovsky, V., Sanabria, E. Rondan, Rosello, M., Rospabe, G., Rouvinet, J., Roy, L., Ruf, T., Ruiz, H., Rummel, C., Rusinov, V., Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Sail, P., Saitta, B., Sakhelashvili, T., Salzmann, C., Varela, A. Sambade, Sannino, M., Santacesaria, R., Santinelli, R., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savidge, T., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schmelling, M., Schmidt, B., Schneider, O., Schneider, T., Schopper, A., Schune, M. -H., Schwemmer, R., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Serra, N., Serrano, J., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Shires, A., Sigurdsson, S., Simioni, E., Skottowe, H. P., Skwarnicki, T., Smale, N., Smith, A., Smith, A. C., Smith, N. A., Sobczak, K., Soler, F. J. P., Solomin, A., Somogy, P., Soomro, F., De Paula, B. Souza, Spaan, B., Sparkes, A., Spiridenkov, E., Spradlin, P., Srednicki, A., Stagni, F., Stahl, S., Steiner, S., Steinkamp, O., Stenyakin, O., Stoica, S., Stone, S., Storaci, B., Straumann, U., Styles, N., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Tarkovskiy, E., Teodorescu, E., Terrier, H., Teubert, F., Thomas, C., Thomas, E., van Tilburg, J., Tisserand, V., Tobin, M., Topp-Joergensen, S., Tran, M. T., Traynor, S., Trunk, U., Tsaregorodtsev, A., Tuning, N., Ukleja, A., Ullaland, O., Uwer, U., Vagnoni, V., Valenti, G., Van Lysebetten, A., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Vervink, K., Viaud, B., Videau, I., Vieira, D., Vilasis-Cardona, X., Visniakov, J., Vollhardt, A., Volyanskyy, D., Voong, D., Vorobyev, A., Vorobyev, An., Voss, H., Wacker, K., Wandernoth, S., Wang, J., Ward, D. R., Webber, A. D., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M. P., Williams, M., Wilson, F. F., Wishahi, J., Witek, M., Witzeling, W., Woodward, M. L., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Yang, Z., Smit, G. Ybeles, Young, R., Yushchenko, O., Zeng, M., Zhang, L., Zhang, Y., Zhelezov, A., and Zverev, E.

Subjects
High Energy Physics - Experiment
Abstract

The production of K_short mesons in pp collisions at a centre-of-mass energy of 0.9 TeV is studied with the LHCb detector at the Large Hadron Collider. The luminosity of the analysed sample is determined using a novel technique, involving measurements of the beam currents, sizes and positions, and is found to be 6.8 +/- 1.0 microbarn^-1. The differential prompt K_short production cross-section is measured as a function of the K_short transverse momentum and rapidity in the region 0 < pT < 1.6 GeV/c and 2.5 < y < 4.0. The data are found to be in reasonable agreement with previous measurements and generator expectations., Comment: 6+18 pages, 6 figures, updated author list

Published
2010
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36. Discretization-related issues in the KPZ equation: Consistency, Galilean-invariance violation, and fluctuation--dissipation relation

Author

Wio, H. S., Revelli, J. A., Deza, R. R., Escudero, C., and de La Lama, M. S.

Subjects
Condensed Matter - Statistical Mechanics, Condensed Matter - Soft Condensed Matter
Abstract

In order to perform numerical simulations of the KPZ equation, in any dimensionality, a spatial discretization scheme must be prescribed. The known fact that the KPZ equation can be obtained as a result of a Hopf--Cole transformation applied to a diffusion equation (with \emph{multiplicative} noise) is shown here to strongly restrict the arbitrariness in the choice of spatial discretization schemes. On one hand, the discretization prescriptions for the Laplacian and the nonlinear (KPZ) term cannot be independently chosen. On the other hand, since the discretization is an operation performed on \emph{space} and the Hopf--Cole transformation is \emph{local} both in space and time, the former should be the same regardless of the field to which it is applied. It is shown that whereas some discretization schemes pass both consistency tests, known examples in the literature do not. The requirement of consistency for the discretization of Lyapunov functionals is argued to be a natural and safe starting point in choosing spatial discretization schemes. We also analyze the relation between real-space and pseudo-spectral discrete representations. In addition we discuss the relevance of the Galilean invariance violation in these consistent discretization schemes, and the alleged conflict of standard discretization with the fluctuation--dissipation theorem, peculiar of 1D., Comment: RevTex, 23pgs, 2 figures, submitted to Phys. Rev. E

Published
2010
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37. Roadmap for selected key measurements of LHCb

Author

The LHCb Collaboration, Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Cartelle, P. Alvarez, Alves Jr, A. A., Amato, S., Amhis, Y., Amoraal, J., Anderson, J., Gutierrez, O. Aquines, Arrabito, L., Artuso, M., Aslanides, E., Auriemma, G., Bachmann, S., Bagaturia, Y., Bailey, D. S., Balagura, V., Baldini, W., Pazos, MdC. Barandela, Barlow, R. J., Barsuk, S., Bates, A., Bauer, C., Bauer, Th., Bay, A., Bediaga, I., Belous, K., Belyaev, I., Benayoun, M., Bencivenni, G., Bernet, R., Bettler, M. -O., Bizzeti, A., Blake, T., Blanc, F., Blanks, C., Blouw, J., Blusk, S., Bobrov, A., Bocci, V., Bondar, A., Bondar, N., Bonivento, W., Borghi, S., Borgia, A., Bos, E., Bowcock, T. J. V., Bozzi, C., Bressieux, J., Brisbane, S., Britsch, M., Brook, N. H., Brown, H., Büchler-Germann, A., Buytaert, J., Cachemiche, J. -P., Cadeddu, S., Carvajal, J. M. Caicedo, Callot, O., Calvi, M., Gomez, M. Calvo, Camboni, A., Cameron, W., Campana, P., Carbone, A., Carboni, G., Cardini, A., Carson, L., Akiba, K. Carvalho, Casse, G., Cattaneo, M., Charles, M., Charpentier, Ph., Chlopik, A., Ciambrone, P., Vidal, X. Cid, Clark, P. J., Clarke, P. E. L., Clemencic, M., Cliff, H. V., Closier, J., Coca, C., Coco, V., Cogan, J., Collins, P., Constantin, F., Conti, G., Contu, A., Corti, G., Cowan, G. A., D'Almagne, B., D'Ambrosio, C., d'Enterria, D. G., Da Silva, W., David, P., De Bonis, I., De Capua, S., De Cian, M., De Lorenzi, F., De Miranda, J. M., De Paula, L., De Simone, P., De Vries, H., Decamp, D., Degaudenzi, H., Deissenroth, M., Del Buono, L., Deplano, C., Deschamps, O., Dettori, F., Dickens, J., Dijkstra, H., Dima, M., Donleavy, S., Reis, A. C. dos, Dovbnya, A., Pree, T. Du, Duval, P. -Y., Dwyer, L., Dzhelyadin, R., Eames, C., Easo, S., Egede, U., Egorychev, V., Eisele, F., Eisenhardt, S., Eklund, L., Pereira, D. Esperante, Estève, L., Eydelman, S., Fanchini, E., Färber, C., Fardell, G., Farinelli, C., Farry, S., Fave, V., Albor, V. Fernandez, Ferro-Luzzi, M., Filippov, S., Fitzpatrick, C., Fontanelli, F., Forty, R., Frank, M., Frei, C., Frosini, M., Pazos, J. L. Fungueirino, Furcas, S., Torreira, A. Gallas, Galli, D., Gandelman, M., Gao, Y., Garnier, J-C., Garrido, L., Gaspar, C., Gauvin, N., Gersabeck, M., Gershon, T., Ghez, Ph., Gibson, V., Gilitsky, Yu., Gligorov, V. V., Göbel, C., Golubkov, D., Golutvin, A., Gomes, A., Gándara, M. Grabalosa, Diaz, R. Graciani, Cardoso, L. A. Granado, Graugés, E., Graziani, G., Grecu, A., Guerrer, G., Gushchin, E., Guz, Yu., Guzik, Z., Gys, T., Hachon, F., Haefeli, G., Haines, S. C., Hampson, T., Hansmann-Menzemer, S., Harji, R., Harnew, N., Harrison, P. F., He, J., Hennessy, K., Henrard, P., Morata, J. A. Hernando, Hicheur, A., Hicks, E., Hofmann, W., Holubyev, K., Hopchev, P., Hulsbergen, W., Hunt, P., Huse, T., Huston, R. S., Hutchcroft, D., Iakovenko, V., Escudero, C. Iglesias, Imong, J., Jacobsson, R., Hussein, M. Jahjah, Jans, E., Jansen, F., Jaton, P., Jean-Marie, B., John, M., Jones, C. R., Jost, B., Kapusta, F., Karbach, T. M., Keaveney, J., Kerzel, U., Ketel, T., Keune, A., Khalil, S., Khanji, B., Kim, Y. M., Knecht, M., Knopf, J., Koblitz, S., Konoplyannikov, A., Koppenburg, P., Korolko, I., Kozlinskiy, A., Krasowski, M., Kravchuk, L., Krokovny, P., Kruzelecki, K., Kucharczyk, M., Kudryashov, I., Kvaratskheliya, T., Lacarrere, D., Lai, A., Lambert, R. W., Lanfranchi, G., Langenbruch, C., Latham, T., Gac, R. Le, Lefevre, R., Leflat, A., Lefrançois, J., Leroy, O., Lessnoff, K., Li, L., Li, Y. Y., Libby, J., Lieng, M., Lindner, R., Lindsey, S., Linn, C., Liu, B., Liu, G., Lopes, J. H., Asamar, E. Lopez, Luisier, J., Machefert, F., Machikhiliyan, I., Maciuc, F., Maev, O., Magnin, J., Maier, A., Mamunur, R. M. D., Manca, G., Mancinelli, G., Mangiafave, N., Marconi, U., Marin, F., Marks, J., Martellotti, G., Martens, A., Martin, L., Santos, D. Martinez, Mathe, Z., Matteuzzi, C., Matveev, V., Mazurov, A., McGregor, G., Mcharek, B., Mclean, C., McNulty, R., Merk, M., Merkel, J., Merkin, M., Messi, R., Metlica, F. C. D., Michalowski, J., Miglioranzi, S., Minard, M. -N., Monteil, S., Moran, D., Morris, J. V., Mountain, R., Mous, I., Muheim, F., Muresan, R., Murtas, F., Muryn, B., Musy, M., Mylroie-Smith, J., Naik, P., Nakada, T., Nandakumar, R., Nardulli, J., Natkaniec, Z., Nedos, M., Needham, M., Neufeld, N., Nicolas, L., Nies, S., Niess, V., Nikitin, N., Noor, A., Oblakowska-Mucha, A., Obraztsov, V., Oggero, S., Okhrimenko, O., Oldeman, R., Orlandea, M., Ostankov, A., Palacios, J., Palutan, M., Panman, J., Papadelis, A., Papanestis, A., Pappagallo, M., Parkes, C., Passaleva, G., Patel, G. D., Patel, M., Paterson, S. K., Patrick, G. N., Pauna, E., Pauna, C., Pavel, C., Alvarez, A. Pazos, Pellegrino, A., Penso, G., Altarelli, M. Pepe, Perazzini, S., Perego, D. L., Yzquierdo, A. Pérez-Calero, Trigo, E. Perez, Perret, P., Pessina, G., Petrella, A., Petrolini, A., Pietrzyk, B., Pinci, D., Playfer, S., Casasus, M. Plo, Polok, G., Poluektov, A., Polycarpo, E., Popov, D., Popovici, B., Poss, S., Potterat, C., Powell, A., Pozzi, S., Pugatch, V., Navarro, A. Puig, Qian, W., Rademacker, J. H., Rakotomiaramanana, B., Raniuk, I., Raven, G., Redford, S., Reece, W., Ricciardi, S., Rinnert, K., Robbe, P., Rodrigues, E., Rodrigues, F., Cobo, C. Rodriguez, Perez, P. Rodriguez, Rogers, G. J., Romanovsky, V., Rospabe, G., Ruf, T., Ruiz, H., Sabatino, G., Silva, J. J. Saborido, Sagidova, N., Saitta, B., Salzmann, C., Varela, A. Sambade, Sannino, M., Santacesaria, R., Santinelli, R., Santovetti, E., Sapunov, M., Sarti, A., Satriano, C., Satta, A., Savrie, M., Savrina, D., Schaack, P., Schiller, M., Schleich, S., Schmelling, M., Schmidt, B., Schneider, O., Schopper, A., Schune, M. -H., Schwemmer, R., Sciubba, A., Seco, M., Semennikov, A., Senderowska, K., Serra, N., Serrano, J., Shao, B., Shapkin, M., Shapoval, I., Shatalov, P., Shcheglov, Y., Shears, T., Shekhtman, L., Shevchenko, V., Simioni, E., Skottowe, H. P., Skwarnicki, T., Smith, A. C., Sobczak, K., Soler, F. J. P., Solomin, A., Somogy, P., Soomro, F., De Paula, B. Souza, Spaan, B., Sparkes, A., Spiridenkov, E., Spradlin, P., Stagni, F., Steinkamp, O., Stoica, S., Stone, S., Storaci, B., Straumann, U., Styles, N., Syryczynski, K., Szczekowski, M., Szczypka, P., Szumlak, T., T'Jampens, S., Terrier, H., Teubert, F., Thomas, C., Thomas, E., Tobin, M., Topp-Joergensen, S., Tran, M. T., Traynor, S., Tsaregorodtsev, A., Tuning, N., Ukleja, A., Ullaland, O., Uwer, U., Vagnoni, V., Valenti, G., van Beuzekom, M., Brand, J. van den, van Eijk, D., van Herwijnen, E., van Lysebetten, A., van Tilburg, J., Gomez, R. Vazquez, Regueiro, P. Vazquez, Vecchi, S., Velthuis, J. J., Veltri, M., Vervink, K., Viaud, B., Videau, I., Vilasis-Cardona, X., Vollhardt, A., Vorobyev, A., Vorobyev, An., Voss, H., Wacker, K., Wandernoth, S., Wang, J., Ward, D. R., Websdale, D., Whitehead, M., Wiedner, D., Wiggers, L., Wilkinson, G., Williams, M., Wilson, F. F., Witek, M., Witzeling, W., Wotton, S. A., Wyllie, K., Xie, Y., Xing, F., Yang, Z., Smit, G. Ybeles, Young, R., Yushchenko, O., Zhang, L., Zhang, Y., Zhelezov, A., and Zwahlen, N.

Subjects
High Energy Physics - Experiment
Abstract

Six of the key physics measurements that will be made by the LHCb experiment, concerning CP asymmetries and rare B decays, are discussed in detail. The "road map" towards the precision measurements is presented, including the use of control channels and other techniques to understand the performance of the detector with the first data from the LHC., Comment: 378 pages; added one author name that had been accidentally omitted

Published
2009

38. Dynamical aspects of isoscaling

Author

Dorso, C. O., Escudero, C. R., Ison, M., and López, J. A.

Subjects
Nuclear Theory
Abstract

The origin and dynamical evolution of isoscaling was studied using classical molecular dynamics simulations of ${}^{40}$Ca + ${}^{40}$Ca, ${}^{48}$Ca + ${}^{48}$Ca, and ${}^{52}$Ca + ${}^{52}$Ca, at beam energies ranging from $20 \ MeV/A$ to $85 MeV/A$. The analysis included a study of the time evolution of this effect. Isoscaling was observed to exist in these reactions from the very early primary isotope distributions (produced by highly {\it non-equilibrated} systems) all the way to asymptotic times. This indicates that isoscaling is independent of quantum effects and thermodynamical equilibrium. In summary, collision-produced isoscaling appears to be due more to the mere partitioning of the proton-neutron content of the participant nuclei, than to specific details of the reaction dynamics.

Published
2005
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39. Geometrical aspects of isoscaling

Author

Dávila, A., Escudero, C., López, J. A., and Dorso, C. O.

Subjects
Nuclear Theory
Abstract

The property of isoscaling in nuclear fragmentation is studied using a simple bond percolation model with ``isospin'' added as an extra degree of freedom. It is shown analytically, first, that isoscaling is expected to exist in such a simple model with the only assumption of fair sampling with homogeneous probabilities. Second, numerical percolations of hundreds of thousands of grids of different sizes and with different $N$ to $Z$ ratios confirm this prediction with remarkable agreement. It is thus concluded that isoscaling emerges from the simple assumption of fair sampling with homogeneous probabilities, a requirement which, if put in the nomenclature of the minimum information theory, translates simply into the existence of equiprobable configurations in maximum entropy states.

Published
2005
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44. Effects of internal fluctuations on the spreading of Hantavirus

Author

Escudero, C., Buceta, J., de la Rubia, F. J., and Lindenberg, Katja

Subjects
Quantitative Biology - Populations and Evolution
Abstract

We study the spread of Hantavirus over a host population of deer mice using a population dynamics model. We show that taking into account the internal fluctuations in the mouse population due to its discrete character strongly alters the behaviour of the system. In addition to the familiar transition present in the deterministic model, the inclusion of internal fluctuations leads to the emergence of an additional deterministically hidden transition. We determine parameter values that lead to maximal propagation of the disease, and discuss some implications for disease prevention policies.

Published
2004
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45. Extinction in population dynamics

Author

Escudero, C., Buceta, J., de la Rubia, F. J., and Lindenberg, Katja

Subjects
Condensed Matter - Statistical Mechanics, Nonlinear Sciences - Adaptation and Self-Organizing Systems, Quantitative Biology - Populations and Evolution
Abstract

We study a generic reaction-diffusion model for single-species population dynamics that includes reproduction, death, and competition. The population is assumed to be confined in a refuge beyond which conditions are so harsh that they lead to certain extinction. Standard continuum mean field models in one dimension yield a critical refuge length L_c such that a population in a refuge larger than this is assured survival. Herein we extend the model to take into account the discreteness and finiteness of the population, which leads us to a stochastic description. We present a particular critical criterion for likely extinction, namely, that the standard deviation of the population be equal to the mean. According to this criterion, we find that while survival can no longer be guaranteed for any refuge size, for sufficiently weak competition one can make the refuge large enough (certainly larger than L_c) to cause extinction to be unlikely. However, beyond a certain value of the competition rate parameter it is no longer possible to escape a likelihood of extinction even in an infinite refuge. These unavoidable fluctuations therefore have a severe impact on refuge design issues.

Published
2003
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46. Outbreaks of Hantavirus induced by seasonality

Author

Escudero, C., Buceta, J., de la Rubia, F. J., and Lindenberg, Katja

Subjects
Condensed Matter - Statistical Mechanics, Quantitative Biology
Abstract

Using a model for rodent population dynamics, we study outbreaks of Hantavirus infection induced by the alternation of seasons. Neither season by itself satisfies the environmental requirements for propagation of the disease. This result can be explained in terms of the seasonal interruption of the relaxation process of the mouse population toward equilibrium, and may shed light on the reported connection between climate variations and outbreaks of the dise ase., Comment: Submitted to PRE

Published
2003

48. Oral immunotherapy for food allergy: A Spanish guideline. Egg and milk immunotherapy Spanish guide (ITEMS GUIDE). Part 2: Maintenance phase of cow milk (CM) and egg oral immunotherapy (OIT), special treatment dosing schedules. Models of dosing schedules of OIT with CM and EGG

Author

Martorell, A., Alonso, E., Echeverría, L., Escudero, C., García-Rodríguez, R., Blasco, C., Bone, J., Borja-Segade, J., Bracamonte, T., Claver, A., Corzo, J.L., De la Hoz, B., Del Olmo, R., Dominguez, O., Fuentes-Aparicio, V., Guallar, I., Larramona, H., Martín-Muñoz, F., Matheu, V., Michavila, A., Ojeda, I., Ojeda, P., Piquer, M., Poza, P., Reche, M., Río, P. Rodríguez del, Rodríguez, M., Ruano, F., Sánchez-García, S., Terrados, S., Valdesoiro, L., and Vazquez-Ortiz, M.

Published
2017
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49. Oral immunotherapy for food allergy: A Spanish guideline. Immunotherapy egg and milk Spanish guide (items guide). Part I: Cow milk and egg oral immunotherapy: Introduction, methodology, rationale, current state, indications contraindications and oral immunotherapy build-up phase

Author

Martorell, A., Alonso, E., Echeverría, L., Escudero, C., García-Rodríguez, R., Blasco, C., Bone, J., Borja-Segade, J., Bracamonte, T., Claver, A., Corzo, J.L., De la Hoz, B., Del Olmo, R., Dominguez, O., Fuentes-Aparicio, V., Guallar, I., Larramona, H., Martín-Muñoz, F., Matheu, V., Michavila, A., Ojeda, I., Ojeda, P., Piquer, M., Poza, P., Reche, M., Rodríguez del Río, P., Rodríguez, M., Ruano, F., Sánchez-García, S., Terrados, S., Valdesoiro, L., and Vazquez-Ortiz, M.

Published
2017
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