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Understanding the extreme luminosity of DES14X2fna

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arXiv 2021年

作者： Grayling, Matthew Gutiérrez, C.P. Sullivan, M. Wiseman, P. Vincenzi, M. González-Gaitán, S. Tucker, B.E. Galbany, L. Kelsey, L. Lidman, C. Swann, E. Carollo, D. Glazebrook, K. Lewis, G.F. Möller, A. Hinton, S.R. Smith, M. Uddin, S.A. Abbott, T.M.C. Aguena, M. Avila, S. Bertin, E. Bhargava, S. Brooks, D. Rosell, A. Carnero Kind, M. Carrasco Carretero, J. Costanzi, M. da Costa, L.N. de Vicente, J. Desai, S. Diehl, H.T. Doel, P. Everett, S. Ferrero, I. Fosalba, P. Frieman, J. García-Bellido, J. Gaztanaga, E. Gruen, D. Gruendl, R.A. Gschwend, J. Gutierrez, G. Hoyle, B. Kuehn, K. Kuropatkin, N. Lima, M. MacCrann, N. Marshall, J.L. Martini, P. Miquel, R. Morgan, R. Palmese, A. Paz-Chinchón, F. Plazas, A.A. Romer, A.K. Sánchez, C. Sanchez, E. Scarpine, V. Serrano, S. Sevilla-Noarbe, I. Soares-Santos, M. Suchyta, E. Tarle, G. Thomas, D. To, C. Varga, T.N. Walker, A.R. Wilkinson, R.D. School of Physics and Astronomy University of Southampton SouthamptonSO17 1BJ United Kingdom DISCnet Centre for Doctoral Training University of Southampton SouthamptonSO17 1BJ United Kingdom Institute of Cosmology and Gravitation University of Portsmouth PortsmouthPO1 3FX United Kingdom CENTRA Instituto Superior Técnico Universidade de Lisboa Av. Rovisco Pais 1 Lisboa1049-001 Portugal The Research School of Astronomy and Astrophysics Australian National University ACT2601 Australia Departamento de Física Teórica y del Cosmos Universidad de Granada GranadaE-18071 Spain INAF Astrophysical Observatory of Turin Pino TorineseI-10025 Italy Centre for Astrophysics & Supercomputing Swinburne University of Technology VIC3122 Australia Sydney Institute for Astronomy School of Physics A28 The University of Sydney NSW2006 Australia Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-FerrandF-63000 France School of Mathematics and Physics University of Queensland BrisbaneQLD4072 Australia McDonald Observatory The University of Texas at Austin Fort DavisTX79734 United States Cerro Tololo Inter-American Observatory NSF's National Optical-Infrared Astronomy Research Laboratory Casilla 603 La Serena Chile Departamento de Física Matemática Instituto de Física Universidade de São Paulo CP 66318 São PauloSP05314-970 Brazil Laboratório Interinstitucional de e-Astronomia - LIneA Rua Gal. José Cristino 77 Rio de JaneiroRJ20921-400 Brazil Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de Madrid Madrid28049 Spain CNRS UMR 7095 Institut d'Astrophysique de Paris ParisF-75014 France Sorbonne Universités UPMC Univ Paris 06 UMR 7095 Institut d'Astrophysique de Paris ParisF-75014 France Department of Physics and Astronomy Pevensey Building University of Sussex BrightonBN1 9QH United Kingdom Department of Physics & Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom Instituto de Astrofisica de Canarias La Lagun

We present DES14X2fna, a high-luminosity, fast-declining type IIb supernova (SN IIb) at redshift z = 0.0453, detected by the Dark Energy Survey (DES). DES14X2fna is an unusual member of its class, with a light curve showing a broad, luminous peak reaching Mr ' −19.3 mag 20 days after explosion. This object does not show a linear decline tail in the light curve until '60 days after explosion, after which it declines very rapidly (4.38±0.10 mag 100 d−1 in r-band). By fitting semi-analytic models to the photometry of DES14X2fna, we find that its light curve cannot be explained by a standard 56Ni decay model as this is unable to fit the peak and fast tail decline observed. Inclusion of either interaction with surrounding circumstellar material or a rapidly-rotating neutron star (magnetar) significantly increases the quality of the model fit. We also investigate the possibility for an object similar to DES14X2fna to act as a contaminant in photometric samples of SNe Ia for cosmology, finding that a similar simulated object is misclassified by a recurrent neural network (RNN)-based photometric classifier as a SN Ia in ∼1.1-2.4 per cent of cases in DES, depending on the probability threshold used for a positive classification. © 2021, CC BY.

关键词： Luminance

Spectral and timing analysis of the accretion-powered Pulsar 4U 1626−67 observed with Suzaku and Nustar

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arXiv 2019年

作者： Iwakiri, Wataru B. Pottschmidt, Katja Falkner, Sebastian Hemphill, Paul B. Fürst, Felix Nishimura, Osamu Walter Schwarm, Fritz Wolff, Michael T. Marcu-Cheatham, Diana M. Chakrabarty, Deepto Tomsick, John A. Wilson-Hodge, Colleen A. Kühnel, Matthias Terada, Yukikatsu Enoto, Teruaki Wilms, Jörn Department of Physics Faculty of Science and Engineering Chuo University 1-13-27 Kasuga Bunkyo-ku Tokyo112-8551 Japan CRESST Department of Physics Center for Space Science and Technology UMBC BaltimoreMD21250 United States Dr. Karl-Remeis-Sternwarte and ECAP Sternwartstr. 7 Bamberg96049 Germany MIT Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States Spain Department of Electronics and Computer Science Nagano National College of Technology Nagano381-8550 Japan Space Science Division Naval Research Laboratory WashingtonDC20375-5352 United States Space Sciences Laboratory University of California BerkeleyCA94720 United States ZP 12 NASA Marshall Space Flight Center Astrophysics Office HuntsvilleAL35812 United States Graduate School of Science and Engineering Saitama University 255 Shimo-Okubo Sakura Saitama338-8570 Japan Hakubi Center for Advanced Research Kyoto University Kyoto606-8302 Japan RIKEN MAXI team 2-1 Hirosawa Wako Saitama351-0198 Japan Cahill Center for Astronomy and Astrophysics California Institute of Technology PasadenaCA91125 United States

We present an analysis of the spectral shape and pulse profile of the accretion-powered pulsar 4U 1626−67 observed with Suzaku and NuSTAR during a spin-up state. The pulsar, which experienced a torque reversal to spin-up in 2008, has a spin period of ∼7.7 s. Comparing the phase-averaged spectra obtained with Suzaku in 2010 and with NuSTAR in 2015, we find that the spectral shape changed between the two observations: the 3–10 keV flux increased by ∼5% while the 30–60 keV flux decreased significantly by ∼35%. Phase-averaged and phase-resolved spectral analysis shows that the continuum spectrum observed by NuSTAR is well described by an empirical NPEX continuum with an added broad Gaussian emission component around the spectral peak at ∼20 keV. Taken together with the observed P value obtained from Fermi/GBM, we conclude that the spectral change between the Suzaku and NuSTAR observations was likely caused by an increase of the accretion rate. We also report the possible detection of asymmetry in the profile of the fundamental cyclotron line. Furthermore, we present a study of the energy-resolved pulse profiles using a new relativistic ray tracing code, where we perform a simultaneous fit to the pulse profiles assuming a two-column geometry with a mixed pencil- and fan-beam emission pattern. The resulting pulse profile decompositions enable us to obtain geometrical parameters of accretion columns (inclination, azimuthal and polar angles) and a fiducial set of beam patterns. This information is important to validate the theoretical predictions from radiation transfer in a strong magnetic field. Copyright © 2019, The Authors. All rights reserved.

关键词： Magnetic fields

Spin and charge signatures of topological superconductivity in rashba nanowires

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arXiv 2017年

作者： Szumniak, Pawel Chevallier, Denis Loss, Daniel Klinovaja, Jelena Department of Physics University of Basel Klingelbergstrasse 82 Basel4056 Switzerland AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We consider a Rashba nanowire with proximity gap which can be brought into the topological phase by tuning external magnetic field or chemical potential. We study spin and charge of the bulk quasiparticle states when passing through the topological transition for open and closed *** show, analytically and numerically, that the spin of bulk states around the topological gap reverses its sign when crossing the transition due to band inversion, independent of the presence of Majorana fermions in the system. This spin reversal can be considered as a bulk signature of topological superconductivity that can be accessed experimentally. We find a similar behaviour for the charge of the bulk quasiparticle states, also exhibiting a sign reversal at the transition. We show that these signatures are robust against random static disorder. Copyright © 2017, The Authors. All rights reserved.

关键词： Nanowires

A Novel Design and Analysis of C-Shaped Thickness of Metamaterial for Multi-Band Microwave Applications

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A Novel Design and Analysis of C-Shaped Thickness of Metamat...

International Conference on Advanced Research in Engineering sciences (ARES)

作者： Hesham Wasel Solomon Mingle Ihab Hassoun College of Physical Science and Technology Physics Central China Normal University Wuhan China School of Electronic Electrical and Computer Engineering University of Birmingham Edgbaston Birmingham UK Faculty of Engineering Communication and Networking City University Tripoli Lebanon

ISBN: (纸本)9781538648452

This paper presents a novel analysis of a C-shaped thickness of metamaterial unit cell structure that is applicable in a multi-band frequency range, which exhibits negative permeability and permittivity in those frequency bands. In the basic design, the separate rectangular resonator is inserted into a bigger split-resonator in a form of C-shape at a gap of 20mm to form a unit structure. Analysis and a comparison of the thickness of 0.1mm, 0.5mm, 1mm, 1.5mm and 2mm unit cell configurations were performed. These configurations demonstrate multi-band operational frequencies with double-negative characteristics. Equivalent circuit model and measured result for each unit cell validate the resonant behaviour. computer Simulation technology (CST) Microwave Studio, was used to obtain the reflection and transmission parameters of each unit cell. This is a unique and promising invention in the electromagnetic model for its double-negative characteristics, simplicity and multi-band operation.

关键词： Metamaterials Permittivity Permeability Resonant frequency Inductance Capacitance

Controlling single-photon detector ID210 with bright light

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arXiv 2019年

作者： Chistiakov, Vladimir Huang, Anqi Egorov, Vladimir Makarov, Vadim Faculty of Photonics and Optical Information ITMO University St. Petersburg Russia Institute for Quantum Information & State Key Laboratory of High Performance Computing College of Computer National University of Defense Technology Changsha410073 China Institute for Quantum Computing University of Waterloo WaterlooONN2L 3G1 Canada Department of Electrical and Computer Engineering University of Waterloo WaterlooONN2L 3G1 Canada Russian Quantum Center Skolkovo Moscow143025 Russia Shanghai Branch National Laboratory for Physical Sciences at Microscale and CAS Center for Excellence in Quantum Information University of Science and Technology of China Shanghai201315 China NTI Center for Quantum Communications National University of Science and Technology MISiS Moscow119049 Russia Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada

We experimentally demonstrate that a single-photon detector ID210 commercially available from ID Quantique is vulnerable to blinding and can be fully controlled by bright illumination. In quantum key distribution, this vulnerability can be exploited by an eavesdropper to perform a faked-state attack giving her full knowledge of the key without being noticed. We consider the attack on standard BB84 protocol and a subcarrier-wave scheme, and outline a possible countermeasure. Copyright © 2019, The Authors. All rights reserved.

关键词： Avalanche photodiodes

Topological phase detection in rashba nanowires with a quantum dot

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arXiv 2017年

作者： Chevallier, Denis Szumniak, Pawel Hoffman, Silas Loss, Daniel Klinovaja, Jelena Department of Physics University of Basel Klingelbergstrasse 82 Basel4056 Switzerland AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We study theoretically the detection of the topological phase transition occurring in Rashba nanowires with proximity-induced superconductivity using a quantum dot. The bulk states lowest in energy of such a nanowire have a spin polarization parallel or antiparallel to the applied magnetic field in the topological or trivial phase, respectively. We show that this property can be probed by the quantum dot created at the end of the nanowire by external gates. By tuning one of the two spin-split levels of the quantum dot to be in resonance with nanowire bulk states one can detect the spin polarization of the lowest band via transport measurement. This allows one to determine the topological phase of the Rashba nanowire independently of the presence of Majorana bound states. Copyright © 2017, The Authors. All rights reserved.

关键词： Nanowires

Performance and Molière radius measurements using a compact prototype of LumiCal in an electron test beam

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arXiv 2018年

作者： Abramowicz, H. Abusleme, A. Afanaciev, K. Benhammou, Y. Borysov, O. Borysova, M. Bozovic-Jelisavcic, I. Daniluk, W. Dannheim, D. Demichev, M. Elsener, K. Firlej, M. Firu, E. Fiutowski, T. Ghenescu, V. Gostkin, M. Hempel, M. Henschel, H. Idzik, M. Ignatenko, A. Ishikawa, A. Joffe, A. Kacarevic, G. Kananov, S. Karacheban, O. Klempt, W. Kotov, S. Kotula, J. Kruchonak, U. Kulis, Sz. Lange, W. Leonard, J. Lesiak, T. Levy, A. Levy, I. Linssen, L. Lohmann, W. Moron, J. Moszczynski, A. Neagu, A.T. Pawlik, B. Preda, T. Sailer, A. Schumm, B. Schuwalow, S. Sicking, E. Swientek, K. Turbiarz, B. Vukasinovic, N. Wojton, T. Yamamoto, H. Zawiejski, L. Zgura, I.S. Zhemchugov, A. Raymond & Beverly Sackler School of Physics & Astronomy Tel Aviv University Tel Aviv Israel Pontificia Universidad Catolica de Chile Santiago Chile NC PHEP Belarusian State University Minsk Belarus Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia IFJ PAN KrakowPL-31342 Poland CERN Geneva Switzerland JINR Dubna Russia Faculty of Physics and Applied Computer Science AGH University of Science and Technology Krakow Poland ISS Bucharest Romania DESY Zeuthen Germany Tohoku University Sendai Japan University of California Santa Cruz United States

A new design of a detector plane of sub-millimetre thickness for an electromagnetic sampling calorimeter is presented. It is intended to be used in the luminometers LumiCal and BeamCal in future linear e+e− collider experiments. The detector planes were produced utilising novel connectivity scheme technologies. They were installed in a compact prototype of the calorimeter and tested at DESY with an electron beam of energy 1-5 GeV. The performance of a prototype of a compact LumiCal comprising eight detector planes was studied. The effective Molière radius at 5 GeV was determined to be (8.1 ± 0.1 (stat) ± 0.3 (syst)) mm, a value well reproduced by the Monte Carlo (MC) simulation (8.4 ± 0.1) mm. The dependence of the effective Molière radius on the electron energy in the range 1-5 GeV was also studied. Good agreement was obtained between data and MC simulation. Copyright © 2018, The Authors. All rights reserved.

关键词： Calorimeters

Dark Energy Survey Year 3 Results: Galaxy mock catalogs for BAO analysis

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arXiv 2021年

作者： Ferrero, Ismael Crocce, M. Tutusaus, I. Porredon, A. Blot, L. Fosalba, P. Carnero Rosell, A. Avila, S. Izard, A. Elvin-Poole, J. Chan, K.C. Camacho, H. Rosenfeld, R. Sanchez, E. Tallada-Crespí, P. Carretero, J. Sevilla-Noarbe, I. Gaztanaga, E. Andrade-Oliveira, F. de Vicente, J. Mena-Fernández, J. Ross, A.J. Sanchez Cid, D. Ferté, A. Brandao-Souza, A. Fang, X. Krause, E. Gomes, D. Aguena, M. Allam, S. Annis, J. Bertin, E. Brooks, D. Carrasco Kind, M. Castander, F.J. Cawthon, R. Choi, A. Conselice, C. Costanzi, M. da Costa, L.N. Pereira, M.E.S. Diehl, H.T. Doel, P. Drlica-Wagner, A. Everett, S. Evrard, A.E. Flaugher, B. Frieman, J. García-Bellido, J. Gerdes, D.W. Gruen, D. Gruendl, R.A. Gschwend, J. Gutierrez, G. Hinton, S.R. Hollowood, D.L. Honscheid, K. Hoyle, B. Huterer, D. James, D.J. Kuehn, K. Lima, M. Maia, M.A.G. Marshall, J.L. Menanteau, F. Miquel, R. Morgan, R. Muir, J. Ogando, R.L.C. Palmese, A. Paz-Chinchón, F. Percival, W.J. Plazas Malagón, A.A. Rodriguez-Monroy, M. Scarpine, V. Schubnell, M. Serrano, S. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M.E.C. Tarle, G. Thomas, D. To, C. Tucker, D.L. Varga, T.N. Institute of Theoretical Astrophysics University of Oslo P.O. Box 1029 Blindern OsloNO-0315 Norway Barcelona08034 Spain Campus UAB Carrer de Can Magrans s/n Barcelona08193 Spain Center for Cosmology and Astro-Particle Physics The Ohio State University ColumbusOH43210 United States Department of Physics The Ohio State University ColumbusOH43210 United States Max-Planck-Institut für Astrophysik Karl-Schwarzschild Str. 1 Garching85741 Germany Instituto de Astrofisica de Canarias E-38205 La Laguna Tenerife Spain Laboratório Interinstitucional de e-Astronomia LIneA Rua Gal. José Cristino 77 RJ Rio de Janeiro20921-400 Brazil Universidad de La Laguna Dpto. Astrofísica E-38206 La Laguna Tenerife Spain Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de Madrid Madrid28049 Spain Institute of Cosmology and Gravitation University of Portsmouth Dennis Sciama Building Burnaby Road PortsmouthPO1 3FX United Kingdom School of Physics and Astronomy Sun Yat-sen University 2 Daxue Road Tangjia Zhuhai519082 China Instituto de Física Teórica Universidade Estadual Paulista São Paulo Brazil ICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista São Paulo Brazil Madrid Spain Campus UAB C. Albareda s/n Bellaterra Barcelona08193 Spain The Barcelona Institute of Science and Technology Campus UAB Bellaterra Barcelona08193 Spain Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Dr. PasadenaCA91109 United States Instituto de Física Gleb Wataghin Universidade Estadual de Campinas Campinas SP 13083-859 Brazil Department of Astronomy/Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States Departamento de Física Matemática Instituto de Física Universidade de São Paulo CP 66318 SP São Paulo05314-970 Brazil Laboratório Interinstitucional de e-Astronomia Rua General José Cristino 77 São Cristóvão RJ Rio de

The calibration and validation of scientific analysis in simulations is a fundamental tool to ensure unbiased and robust results in observational cosmology. In particular, mock galaxy catalogs are a crucial resource to achieve these goals in the measurement of baryon acoustic oscillation (BAO) in the clustering of galaxies. Here we present a set of 1 952 galaxy mock catalogs designed to mimic the Dark Energy Survey (DES) Year 3 BAO sample over its full photometric redshift range 0.6 photo `, and projected clustering ξp(r) to theoretical predictions and data. The impact of volume replication in the estimate of the covariance is also investigated. The success in accurately reproducing the photometric redshift uncertainties and the galaxy clustering as a function of redshift render this mock creation pipeline as a benchmark for future analyses of photometric galaxy surveys. Copyright © 2021, The Authors. All rights reserved.

关键词： Galaxies

Erratum to: Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb−1 of = 13 TeV pp collision data with the ATLAS detector

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Journal of High Energy physics 2019年第8期2019卷 1-19页

作者： Aaboud, M. Aad, G. Abbott, B. Abdinov, O. Abeloos, B. Abidi, S. H. AbouZeid, O. S. Abraham, N. L. Abramowicz, H. Abreu, H. Abreu, R. Abulaiti, Y. Acharya, B. S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A. A. Afik, Y. Agatonovic-Jovin, T. agheorghiesei, C. Aguilar-Saavedra, J. A. Ahlen, S. P. Ahmadov, F. Aielli, G. Akatsuka, S. Akerstedt, H. Åkesson, T. P. A. Akilli, E. Akimov, A. V. Alberghi, G. L. Albert, J. Albicocco, P. Alconada Verzini, M. J. Alderweireldt, S. C. Aleksa, M. Aleksandrov, I. N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, B. Aliev, M. Alimonti, G. Alison, J. Alkire, S. P. Allbrooke, B. M. M. Allen, B. W. Allport, P. P. Aloisio, A. Alonso, A. Alonso, F. Alpigiani, C. Alshehri, A. A. Alstaty, M. I. Alvarez Gonzalez, B. Álvarez Piqueras, D. Alviggi, M. G. Amadio, B. T. Amaral Coutinho, Y. Amelung, C. Amidei, D. Amor Dos Santos, S. P. Amoroso, S. Amundsen, G. Anastopoulos, C. Ancu, L. S. Andari, N. Andeen, T. Anders, C. F. Anders, J. K. Anderson, K. J. Andreazza, A. Andrei, V. Angelidakis, S. Angelozzi, I. Angerami, A. Anisenkov, A. V. Anjos, N. Annovi, A. Antel, C. Antonelli, M. Antonov, A. Antrim, D. J. Anulli, F. Aoki, M. Aperio Bella, L. Arabidze, G. Arai, Y. Araque, J. P. Araujo Ferraz, V. Arce, A. T. H. Ardell, R. E. Arduh, F. A. Arguin, J-F. Argyropoulos, S. Arik, M. Armbruster, A. J. Armitage, L. J. Arnaez, O. Arnold, H. Arratia, M. Arslan, O. Artamonov, A. Artoni, G. Artz, S. Asai, S. Asbah, N. Ashkenazi, A. Asquith, L. Assamagan, K. Astalos, R. Atkinson, M. Atlay, N. B. Augsten, K. Avolio, G. Axen, B. Ayoub, M. K. Azuelos, G. Baas, A. E. Baca, M. J. Bachacou, H. Bachas, K. Backes, M. Bagnaia, P. Bahmani, M. Bahrasemani, H. Baines, J. T. Bajic, M. Baker, O. K. Baldin, E. M. Balek, P. Balli, F. Balunas, W. K. Banas, E. Bandyopadhyay, A. Banerjee, Sw. Bannoura, A. A. E. Barak, L. Barberio, E. L. Barberis, D. Barbero, M. Barillari, T. Barisits, M-S Barkeloo, J. T. Barklow, T. Barlow, N. Barnes, S. L. Barnett, B. M. Barnett, R. M. Barnovska-Blenessy, Z Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman U.S.A. Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics University of Toronto Toronto Canada Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz U.S.A. Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene U.S.A. Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Udine Italy ICTP Trieste Italy Department of Physics King’s College London London United Kingdom International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb U.S.A. Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Laboratório de Instrumentação e Física Experimental de Partículas – LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos Universidad de Granada Granada Portugal Department of Physics Boston University Boston U.S.A. Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy Dip

One correction is made to the figure 4e of the paper.

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