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Influence of fast emissions and statistical de-excitation on the isospin transport ratio

Physical Review C 2020年第4期102卷 044607-044607页

作者： A. Camaiani S. Piantelli A. Ono G. Casini B. Borderie R. Bougault C. Ciampi J. A. Dueñas C. Frosin J. D. Frankland D. Gruyer N. LeNeindre I. Lombardo G. Mantovani P. Ottanelli M. Parlog G. Pasquali S. Upadhyaya S. Valdré G. Verde E. Vient Dipartimento di Fisica Università di Firenze Italy INFN Sezione di Firenze Italy Department of Physics Tohoku University Sendai 980-8578 Japan Université Paris-Saclay CNRS/IN2P3 IJCLab 91405 Orsay France Normandie Université ENSICAEN UNICAEN CNRS/IN2P3 LPC Caen 14000 Caen France Depto. de Ingeniería Eléctrica y Centro de Estudios Avanzados en Física Matemáticas y Computación Universidad de Huelva 21007 Huelva Spain GANIL CEA/DRF-CNRS/IN2P3 14076 Caen France INFN Sezione di Catania 95123 Catania Italy INFN Laboratori Nazionali di Legnaro 35020 Legnaro Italy Dipartimento di Fisica Universitá di Padova 35131 Padova Italy Universidade de Santiago de Compostela 15705 Santiago de Compostela Spain “Horia Hulubei” National Institute of Physics and Nuclear Engineering (IFIN-HH) RO-077125 Bucharest Magurele Romania Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University 30-348 Kracow Poland

Isospin transport ratio is a powerful method to estimate the neutron-proton (n-p) equilibration in heavy-ion collisions, and extensively used to obtain information on the asy-stiffness of the nuclear equation of state. In fact such a ratio is expected to bypass any perturbations introducing a linear transformation of the chosen observable. In particular, it is supposed to overcome contributions due to emission, either of dynamical or statistical nature, from the primary fragments formed during the collisions. In this paper we explore the validity of this assumption, looking at the quasiprojectile n-p ratio (N/Z) in peripheral and semiperipheral events for Ca+Ca reactions at 35MeV/nucleon, simulated via the antisymmetrized molecular dynamics transport model, coupled to different statistical decay codes. The statistical de-excitation of the primary fragments introduces a linear transformation at relatively high excitation energies (above 2MeV/nucleon) when the residue approaches the evaporation attractor line, while some effect is produced at lower excitation energies due to the occurrence of some nonlinearities. As for fast emissions after the end of the projectile-target interaction it is shown that they introduce a nonlinear transformation too.

关键词： Models & methods for nuclear reactions Nuclear reactions

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First-principles calculation on electron transport properties of Ca-Si

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Materials Today: Proceedings 2018年第6期5卷 14052-14056页

作者： Meena Rittiruam Suwipong Hemathulin Sirakan Yokhasing Korakot Matarat Tosawat Seetawan Program of Physics Faculty of Science and Technology Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand Simulation Research Laboratory Center of Excellence on Alternative Energy Research and Development Institute Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand Program of Mechanical and Industrial Faculty of Industrial Technology Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand Program of Computer Faculty of Science and Technology Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand

This work we evaluated the electronic structure and electron transport properties of CaSi, Ca 2 Si, CaSi 2 , and Ca 5 Si 3 by using Quantum ESPRESSO and BoltzTraP. Our calculated appear high power factor 213 µW m –1 K –2 at hole concentration 1.54×10 22 cm –3 for CaSi, 959 µW m –1 K –2 at electron concentration 4.19×10 20 cm –3 for CaSi 2 , at 1200 K. In addition, Ca 5 Si 3 exhibit high power factor 715 µW m –1 K –2 at electron concentration 3.79×10 21 cm –3 at 700 K. The power factor of CaSi 2 and Ca 5 Si 3 are strong candidate for thermoelectric material. © 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of SACT 2016.

关键词： Seebeck coefficient Electrical conductivity Boltzmann transport theory Density functional Theory Thermoelectric

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Cardiac SPECT radiomics features repeatability and reproducibility: A multi scanner phantom study

arXiv

引用

arXiv 2019年

作者： Edalat-Javid, Mohammad Shiri, Isaac Hajianfar, Ghasem Abdollahi, Hamid Oveisi, Niki Javadian, Mohammad Zafarghandi, Mojtaba Shamsaei Malek, Hadi Bitarafan-Rajabi, Ahmad Oveisi, Mehrdad Faculty of Nuclear Engineering and Physics Amirkabir University of Technology Tehran Iran Division of Nuclear Medicine and Molecular Imaging Department of Medical Imaging Geneva University Hospital Geneva 4CH-1211 Switzerland Rajaie Cardiovascular Medical and Research Center Iran University of Medical Science Tehran Iran Department of Radiologic Sciences and Medical Physics Faculty of Allied Medicine Kerman University Kerman Iran School of Population and Public Health University of British Columbia BCV6T 1Z4 Canada Department of Computer Science Kermanshah University of Technology Kermanshah Iran Department of Nuclear Medicine and Molecular Imaging Rajaie Cardiovascular Medical and Research Center Iran University of Medical Sciences Tehran Iran Cardiovascular Intervention Research Center Rajaie Cardiovascular Medical and Research Center Iran University of Medical Sciences Tehran Iran Echocardiography Research Center Rajaie Cardiovascular Medical and Research Center Iran University of Medical Sciences Tehran Iran Department of Computer Science University of British Columbia VancouverBC Canada Division of Nuclear Medicine and Molecular Imaging Department of Medical Imaging Geneva University Hospital Geneva 4CH-1211 Switzerland

Background: The aim of this study was to assess the robustness of cardiac SPECT radiomics features against changes in imaging settings including acquisition and reconstruction settings. Methods: Four scanners were used to acquire SPECT scans of a cardiac phantom with 5mCi of 99mTc. The effects of different image acquisition and reconstruction settings including the Number of View, View Matrix Size, attenuation correction, image reconstruction algorithm, number of iterations, number of subsets, type of filter, full width at half maximum (FWHM) of Gaussian filter, Butterworth filter order, and Butterworth filter cut-off were studied. In total 5263 different images were reconstructed. Eighty-seven radiomic features including first, second, and high order textures were extracted from images. To assess reproducibility and repeatability the coefficient of variation (COV) was used for each image feature over the different imaging settings. Result: IDMN and IDN features from GLCM, RP from GLRLM, ZE from GLSZM, and DE from GLDM feature sets were the only features that were the most reproducible (COV ≤ 5%) against changes in all imaging settings. In addition, the IDMN feature from GLCM, LALGLE, SALGLE and LGLZE from GLSZM, and SDLGLE from GLDM feature sets were the features that were less reproducible (COV>20 %) against changes in all imaging settings. Matrix size has the greatest impact on feature variability as most of features are not repeatable and 82.76% of them had (COV>20 %). Conclusion: Repeatability and reproducibility of SPECT/CT radiomics texture features in different imaging settings is feature-dependent, and different image acquisitions and reconstructions have different effects on radiomics texture features. Low COV radiomics features could be consider for further clinical studies. Copyright © 2019, The Authors. All rights reserved.

关键词： Heart

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Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters

arXiv

引用

arXiv 2021年

作者： Grandis, Sebastian Mohr, J.J. Costanzi, M. Saro, A. Bocquet, S. Klein, M. Aguena, M. Allam, S. Annis, J. Ansarinejad, B. Bacon, D. Bertin, E. Bleem, L. Brooks, D. Burke, D.L. Rosel, A. Carnero Kind, M. Carrasco Carretero, J. Castander, F.J. Choi, A. da Costa, L.N. de Vincente, J. Desai, S. Diehl, H.T. Dietrich, J.P. Doel, P. Eifler, T.F. Everett, S. Ferrero, I. Floyd, B. Fosalba, P. Frieman, J. García-Bellido, J. Gaztanaga, E. Gruen, D. Gruendl, R.A. Gschwend, J. Gupta, N. Gutierrez, G. Hinton, S.R. Hollowood, D.L. Honscheid, K. James, D.J. Jeltema, T. Kuehn, K. Lahav, O. Lidman, C. Lima, M. Maia, M.A.G. March, M. Marshall, J.L. Melchior, P. Menanteau, F. Miquel, R. Morgan, R. Myles, J. Ogando, R. Palmese, A. Paz-Chinchón, F. Plazas, A.A. Reichardt, C.L. Romer, A.K. Sanchez, E. Scarpine, V. Serrano, S. Sevilla-Noarbe, I. Singh, P. Smith, M. Suchyta, E. Swanson, M.E.C. Tarle, G. Thomas, D. To, C. Weller, J. Wilkinson, R.D. Wu, H. Faculty of Physics Ludwig-Maximilians-Universität Scheinerstr. 1 Munich81679 Germany Excellence Cluster ORIGINS Boltzmannstr. 2 Garching85748 Germany Max Planck Institute for Extraterrestrial Physics Giessenbachstr. 85748 Garching Germany INAF - Osservatorio Astronomico di Trieste via G. B. Tiepolo 11 TriesteI-34143 Italy IFPU - Institute for Fundamental Physics of the Universe Via Beirut 2 Trieste34014 Italy Astronomy Unit Department of Physics University of Trieste via Tiepolo 11 TriesteI-34131 Italy INFN National Institute for Nuclear Physics Via Valerio 2 TriesteI-34127 Italy 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 Fermi National Accelerator Laboratory P. O. Box 500 BataviaIL60510 United States CEA Physics Department Durham University South Road DurhamDH1 3LE United Kingdom Institute of Cosmology and Gravitation University of Portsmouth PortsmouthPO1 3FX United Kingdom 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 High Energy Physics Division Argonne National Laboratory 9700 South Cass Avenue LemontIL60439 United States Kavli Institute for Cosmological Physics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Department of Physics & Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom Kavli Institute for Particle Astrophysics & Cosmology Stanford University P. O. Box 2450 StanfordCA94305 United States SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Instituto de Astrofisica de Canarias La Laguna TenerifeE-38205 Spain Universidad de La Laguna Dpto. Astrofísica La Laguna TenerifeE-38206 Spain Department of Astronomy University

We perform a cross validation of the cluster catalog selected by the red-sequence Matched-filter Probabilistic Percolation algorithm (redMaPPer) in Dark Energy Survey year 1 (DESY1) data by matching it with the Sunyaev-Zel'dovich effect (SZE) selected cluster catalog from the South Pole Telescope SPT-SZ survey. Of the 1005 redMaPPer selected clusters with measured richness λ^ > 40 in the joint footprint, 207 are confirmed by SPT-SZ. Using the mass information from the SZE signal, we calibrate the richness-mass relation using a Bayesian cluster population model. We find a mass trend λ ∝ MB consistent with a linear relation (B ∼ 1), no significant redshift evolution and an intrinsic scatter in richness of σλ = 0.22 ± 0.06. By considering two error models, we explore the impact of projection effects on the richness-mass modelling, confirming that such effects are not detectable at the current level of systematic uncertainties. At low richness SPT-SZ confirms fewer redMaPPer clusters than expected. We interpret this richness dependent deficit in confirmed systems as due to the increased presence at low richness of low mass objects not correctly accounted for by our richness-mass scatter model, which we call contaminants. At a richness λ^ = 40, this population makes up >12% (97.5 percentile) of the total population. Extrapolating this to a measured richness λ^ = 20 yields >22% (97.5 percentile). With these contamination fractions, the predicted redMaPPer number counts in different plausible cosmologies are compatible with the measured abundance. The presence of such a population is also a plausible explanation for the different mass trends (B ∼ 0.75) obtained from mass calibration using purely optically selected clusters. The mean mass from stacked weak lensing (WL) measurements suggests that these low mass contaminants are galaxy groups with masses ∼ 3- 5 × 1013 M which are beyond the sensitivity of current SZE and X-ray surveys but a natural target for SPT-3G and eROSI

关键词： Contamination

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Electronic structure and Seebeck coefficient of n -type Mg 2 Si by molecular orbital calculation

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Materials Today: Proceedings 2018年第6期5卷 14074-14078页

作者： Sirakan Yokhasing Kongphope Chaarmart Meena Rittiruam Korakot Matarat Tosawat Seetawan Program of Physics Faculty of Science and Technology Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand Simulation Research Laboratory Center of Excellence on Alternative Energy Research Development Institute Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand Program of Electrical and Electronics. Faculty of Industrial Technology Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand Program of Computer Faculty of Science and Technology Sakon Nakhon Rajabhat University Sakon Nakhon 47000 Thailand

In this work, we evaluated the electronic structure and Seebeck coefficient ( S ) of Mg 2 Si by molecular orbital calculation. The energy level, density of state, electron contour map, Fermi energy and S were analyzed. The electronic structure show that, the energy gap = 0.68 eV, and the highest of density of state at 22.4 eV. The electron contour map exhibits the highest density of Si atom at HOMO and LUMO. The S exhibits negative value which indicated that n -type thermoelectric material. This calculated imply that the S has dependent on Fermi energy which is decreased with increasing temperature.

关键词： Thermoelectric Magnesium Silicide DV-Xα Boltzmann theory Mott expression HOMO LUMO

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Induced Ramsey-type results and binary predicates for point sets

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Electronic Notes in Discrete Mathematics 2017年 61卷 77-83页

作者： Balko, Martin Kynčl, Jan Langerman, Stefan Pilz, Alexander Department of Applied Mathematics Institute for Theoretical Computer Science Faculty of Mathematics and Physics Charles University Czech Republic Département d'Informatique Université Libre de Bruxelles Brussels Belgium Department of Computer Science ETH Zürich Zurich Switzerland

Let A and B be two finite sets of points in the plane in general position (neither of these sets contains three collinear points). We say that A lies deep below B if every point from A lies below every line determined by two points from B and every point from B lies above every line determined by two points from A. A point set P is decomposable if either |P|=1 or there is a partition P₁∪P₂ of P into nonempty and decomposable sets such that P₁ is to the left of P₂ and P₁ is deep below P₂. Extending a result of Nešetřil and Valtr, we show that for every decomposable point set Q and a positive integer k there is a finite set P of points in the plane in general position that satisfies the following Ramsey-type statement. For any partition C₁∪⋯∪C_k of the pairs of points from P (that is, of the edges of the complete graph on P), there is a subset Q^′ of P with the same triple-orientations as Q such that all pairs of points from Q^′ are in the same part C_i. We then use this result to show that for every k there is a point set P such that no function Γ that maps ordered pairs of distinct points from P to a set of size k can satisfy the following property: if Γ attains the same values on two ordered triples of points from P, then these triples have the same orientation. Intuitively, this implies that there cannot be such a function that is defined locally and determines the orientation of point triples. © 2017 Elsevier B.V.

关键词： induced Ramsey theorem order type point set point-set predicate

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First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA

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Physical Review Letters 2019年第15期123卷 151803-151803页

作者： M. A. Acero P. Adamson L. Aliaga T. Alion V. Allakhverdian S. Altakarli N. Anfimov A. Antoshkin A. Aurisano A. Back C. Backhouse M. Baird N. Balashov P. Baldi B. A. Bambah S. Bashar K. Bays S. Bending R. Bernstein V. Bhatnagar B. Bhuyan J. Bian T. Blackburn J. Blair A. C. Booth P. Bour C. Bromberg N. Buchanan A. Butkevich S. Calvez M. Campbell T. J. Carroll E. Catano-Mur A. Cedeno S. Childress B. C. Choudhary B. Chowdhury T. E. Coan M. Colo J. Cooper L. Corwin L. Cremonesi G. S. Davies P. F. Derwent P. Ding Z. Djurcic D. Doyle E. C. Dukes H. Duyang S. Edayath R. Ehrlich M. Elkins G. J. Feldman P. Filip W. Flanagan M. J. Frank H. R. Gallagher R. Gandrajula F. Gao S. Germani A. Giri R. A. Gomes M. C. Goodman V. Grichine M. Groh R. Group B. Guo A. Habig F. Hakl J. Hartnell R. Hatcher A. Hatzikoutelis K. Heller J. Hewes A. Himmel A. Holin B. Howard J. Huang J. Hylen F. Jediny C. Johnson M. Judah I. Kakorin D. Kalra D. M. Kaplan R. Keloth O. Klimov L. W. Koerner L. Kolupaeva S. Kotelnikov I. Kourbanis A. Kreymer Ch. Kulenberg A. Kumar C. D. Kuruppu V. Kus T. Lackey K. Lang S. Lin M. Lokajicek J. Lozier S. Luchuk K. Maan S. Magill W. A. Mann M. L. Marshak M. Martinez-Casales V. Matveev D. P. Méndez M. D. Messier H. Meyer T. Miao W. H. Miller S. R. Mishra A. Mislivec R. Mohanta A. Moren L. Mualem M. Muether S. Mufson K. Mulder R. Murphy J. Musser D. Naples N. Nayak J. K. Nelson R. Nichol G. Nikseresht E. Niner A. Norman T. Nosek A. Olshevskiy T. Olson J. Paley R. B. Patterson G. Pawloski D. Pershey O. Petrova R. Petti D. D. Phan R. K. Plunkett B. Potukuchi C. Principato F. Psihas A. Radovic V. Raj R. A. Rameika B. Rebel P. Rojas V. Ryabov O. Samoylov M. C. Sanchez S. Sánchez Falero I. S. Seong P. Shanahan A. Sheshukov P. Singh V. Singh E. Smith J. Smolik P. Snopok N. Solomey E. Song A. Sousa K. Soustruznik M. Strait L. Suter A. Sutton R. L. Talaga B. Tapia Oregui P. Tas R. B. Thayyullathil J. Thomas E. Tiras D. Torbunov J. Tripathi A. Tsaris Y. Torun J. Urheim P. Vahle J. Vasel L. Vinton P. Vokac T. Vrba M. Wallbank B. Universidad del Atlantico Km. 7 antigua via a Puerto Colombia Barranquilla Colombia Fermi National Accelerator Laboratory Batavia Illinois 60510 USA Department of Physics and Astronomy University of Sussex Falmer Brighton BN1 9QH United Kingdom Joint Institute for Nuclear Research Dubna Moscow region 141980 Russia Department of Mathematics Statistics and Physics Wichita State University Wichita Kansas 67206 USA Department of Physics University of Cincinnati Cincinnati Ohio 45221 USA Department of Physics and Astronomy Iowa State University Ames Iowa 50011 USA Physics and Astronomy Dept. University College London Gower Street London WC1E 6BT United Kingdom Indiana University Bloomington Indiana 47405 USA Department of Physics University of Virginia Charlottesville Virginia 22904 USA Department of Physics and Astronomy University of California at Irvine Irvine California 92697 USA School of Physics University of Hyderabad Hyderabad 500 046 India Department of Physics and Astronomy Tufts University Medford Massachusetts 02155 USA California Institute of Technology Pasadena California 91125 USA Department of Physics Illinois Institute of Technology Chicago Illinois 60616 USA Department of Physics Panjab University Chandigarh 160 014 India Department of Physics IIT Guwahati Guwahati 781 039 India School of Physics and Astronomy University of Minnesota Twin Cities Minneapolis Minnesota 55455 USA Department of Physics University of Houston Houston Texas 77204 USA Czech Technical University in Prague Brehova 7 115 19 Prague 1 Czech Republic Department of Physics and Astronomy Michigan State University East Lansing Michigan 48824 USA Department of Physics Colorado State University Fort Collins Colorado 80523-1875 USA Institute for Nuclear Research of Russia Academy of Sciences 7a 60th October Anniversary prospect Moscow 117312 Russia Department of Physics University of Texas at Austin Austin Texas 78712 USA Department of Physics Coll

The NOvA experiment has seen a 4.4σ signal of ν¯e appearance in a 2 GeV ν¯μ beam at a distance of 810 km. Using 12.33×1020 protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 ν¯μ→ν¯e candidates with a background of 10.3 and 102 ν¯μ→ν¯μ candidates. This new antineutrino data are combined with neutrino data to measure the parameters |Δm322|=2.48−0.06+0.11×10−3 eV2/c4 and sin2θ23 in the ranges from (0.53–0.60) and (0.45–0.48) in the normal neutrino mass hierarchy. The data exclude most values near δCP=π/2 for the inverted mass hierarchy by more than 3σ and favor the normal neutrino mass hierarchy by 1.9σ and θ23 values in the upper octant by 1.6σ.

关键词： Neutrino oscillations Particle mixing & oscillations Neutrinos Neutrino detectors

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The influence of relationships strength on their duration in blogosphere

The influence of relationships strength on their duration in...

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International Conference on Behavior, Economic and Social Computing (BESC)

作者： Krzysztof Rudek Jarosław Koźlak Faculty of Computer Science AGH University of Science and Technology Kraków Poland

Social media users create communities or groups that focus on a particular topic or place. In addition, logins ascribed to users allow us to link created content with its authors, by which means direct relationships between them are being created. In this article we analyze relations between users of Polish blogosphere, where direct interactions between them constitute a basis for assessment of the relation strength and its durability in time. We also analyze how amount of created content, influences the strength of the relationship between their author and the bloggers writing comments.

关键词： Nickel Standards Blogs Social network services Portals computer science Telecommunications

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Complexity of the steiner network problem with respect to the number of terminals

arXiv

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arXiv 2018年

作者： Eiben, Eduard Knop, Dušan Panolan, Fahad Suchý, Ondřej Algorithms and Complexity Group TU Wien Vienna Austria Department of Informatics University of Bergen Bergen Norway Department of Applied Mathematics Faculty of Mathematics and Physics Charles University Prague Czech Republic Department of Theoretical Computer Science Faculty of Information Technology Czech Technical University in Prague Prague Czech Republic

In the Directed Steiner Network problem we are given an arc-weighted digraph G, a set of terminals T ⊆ V (G), and an (unweighted) directed request graph R with V (R) = T. Our task is to output a subgraph G′ ⊆ G of the minimum cost such that there is a directed path from s to t in G′ for all st ∈ A(R). It is known that the problem can be solved in time |V (G)|O(|A(R)|) [Feldman&Ruhl, SIAM J. Comput. 2006] and cannot be solved in time |V (G)|o(|A(R)|) even if G is planar, unless Exponential-Time Hypothesis (ETH) fails [Chitnis et al., SODA 2014]. However, as this reduction (and other reductions showing hardness of the problem) only shows that the problem cannot be solved in time |V (G)|o(|T|) unless ETH fails, there is a significant gap in the complexity with respect to |T| in the exponent. We show that Directed Steiner Network is solvable in time f(R) · |V (G)|O(cg·|T|), where cg is a constant depending solely on the genus of G and f is a computable function. We complement this result by showing that there is no f(R)·|V (G)|o(|T|2/ log |T|) algorithm for any function f for the problem on general graphs, unless ETH fails. Copyright © 2018, The Authors. All rights reserved.

关键词： Complex networks

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Combined search for neutrinos from dark matter self-annihilation in the Galactic Center with ANTARES and IceCube

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Physical Review D 2020年第8期102卷 082002-082002页

作者： A. Albert M. André M. Anghinolfi M. Ardid J.-J. Aubert J. Aublin B. Baret S. Basa B. Belhorma V. Bertin S. Biagi M. Bissinger J. Boumaaza M. Bouta M. C. Bouwhuis H. Brânzaş R. Bruijn J. Brunner J. Busto A. Capone L. Caramete J. Carr S. Celli M. Chabab T. N. Chau R. Cherkaoui El Moursli T. Chiarusi M. Circella A. Coleiro M. Colomer R. Coniglione P. Coyle A. Creusot A. F. Díaz A. Deschamps C. Distefano I. Di Palma A. Domi C. Donzaud D. Dornic D. Drouhin T. Eberl N. El Khayati A. Enzenhöfer A. Ettahiri P. Fermani G. Ferrara F. Filippini L. Fusco P. Gay H. Glotin R. Gozzini R. Gracia Ruiz K. Graf C. Guidi S. Hallmann H. van Haren A. J. Heijboer Y. Hello J. J. Hernández-Rey J. Hößl J. Hofestädt F. Huang G. Illuminati C. W. James M. de Jong P. de Jong M. Jongen M. Kadler O. Kalekin U. Katz N. R. Khan-Chowdhury A. Kouchner I. Kreykenbohm V. Kulikovskiy R. Lahmann R. Le Breton D. Lefèvre E. Leonora G. Levi M. Lincetto D. Lopez-Coto S. Loucatos G. Maggi J. Manczak M. Marcelin A. Margiotta A. Marinelli J. A. Martínez-Mora R. Mele K. Melis P. Migliozzi M. Moser A. Moussa R. Muller L. Nauta S. Navas E. Nezri C. Nielsen A. Nuñez-Castiñeyra B. O’Fearraigh M. Organokov G. E. Păvălaş C. Pellegrino M. Perrin-Terrin P. Piattelli C. Poirè V. Popa T. Pradier N. Randazzo S. Reck G. Riccobene A. Sánchez-Losa D. F. E. Samtleben M. Sanguineti P. Sapienza F. Schüssler M. Spurio Th. Stolarczyk B. Strandberg M. Taiuti Y. Tayalati T. Thakore S. J. Tingay A. Trovato B. Vallage V. Van Elewyck F. Versari S. Viola D. Vivolo J. Wilms D. Zaborov A. Zegarelli J. D. Zornoza J. Zúñiga M. G. Aartsen M. Ackermann J. Adams J. A. Aguilar M. Ahlers M. Ahrens C. Alispach K. Andeen T. Anderson I. Ansseau G. Anton C. Argüelles J. Auffenberg S. Axani H. Bagherpour X. Bai A. Balagopal V. A. Barbano S. W. Barwick B. Bastian V. Baum S. Baur R. Bay J. J. Beatty K.-H. Becker J. Becker Tjus S. BenZvi D. Berley E. Bernardini D. Z. Besson G. Binder D. Bindig E. Blaufuss S. Blot C. Bohm S. Böser O. Botner J. Böttcher E. Bourbeau J. Bourbeau F. Bradascio J. Braun S. B Université de Strasbourg CNRS IPHC UMR 7178 F-67000 Strasbourg France Université de Haute Alsace F-68200 Mulhouse France Technical University of Catalonia Laboratory of Applied Bioacoustics Rambla Exposició 08800 Vilanova i la Geltrú Barcelona Spain INFN - Sezione di Genova Via Dodecaneso 33 16146 Genova Italy Institut d’Investigació per a la Gestió Integrada de les Zones Costaneres (IGIC) - Universitat Politècnica de València. C/ Paranimf 1 46730 Gandia Spain Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France APC Université de Paris CNRS Astroparticule et Cosmologie F-75013 Paris France Aix Marseille Univ CNRS CNES LAM Marseille France National Center for Energy Sciences and Nuclear Techniques B.P.1382 R. P.10001 Rabat Morocco INFN - Laboratori Nazionali del Sud (LNS) Via S. Sofia 62 95123 Catania Italy Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Centre for Astroparticle Physics Erwin-Rommel-Str. 1 91058 Erlangen Germany University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 R.P. 10000 Rabat Morocco University Mohammed I Laboratory of Physics of Matter and Radiations B.P.717 Oujda 6000 Morocco Nikhef Science Park Amsterdam The Netherlands Institute of Space Science RO-077125 Bucharest Măgurele Romania Universiteit van Amsterdam Instituut voor Hoge-Energie Fysica Science Park 105 1098 XG Amsterdam The Netherlands INFN - Sezione di Roma P.le Aldo Moro 2 00185 Roma Italy Dipartimento di Fisica dell’Università La Sapienza P.le Aldo Moro 2 00185 Roma Italy Gran Sasso Science Institute Viale Francesco Crispi 7 00167 L’Aquila Italy LPHEA Faculty of Science - Semlali Cadi Ayyad University P.O.B. 2390 Marrakech Morocco INFN - Sezione di Bologna Viale Berti-Pichat 6/2 40127 Bologna Italy INFN - Sezione di Bari Via E. Orabona 4 70126 Bari Italy IFIC - Instituto de Física Corpuscular (CSIC - Universitat de València) c/ Catedrático José Beltrán 2 E-46980 Paterna Valencia Spain Department of Computer Ar

We present the results of the first combined dark matter search targeting the Galactic Center using the ANTARES and IceCube neutrino telescopes. For dark matter particles with masses from 50 to 1000 GeV, the sensitivities on the self-annihilation cross section set by ANTARES and IceCube are comparable, making this mass range particularly interesting for a joint analysis. Dark matter self-annihilation through the τ+τ−, μ+μ−, bb¯, and W+W− channels is considered for both the Navarro-Frenk-White and Burkert halo profiles. In the combination of 2101.6 days of ANTARES data and 1007 days of IceCube data, no excess over the expected background is observed. Limits on the thermally averaged dark matter annihilation cross section ⟨σAυ⟩ are set. These limits present an improvement of up to a factor of 2 in the studied dark matter mass range with respect to the individual limits published by both collaborations. When considering dark matter particles with a mass of 200 GeV annihilating through the τ+τ− channel, the value obtained for the limit is 7.44×10−24 cm3 s−1 for the Navarro-Frenk-White halo profile. For the purpose of this joint analysis, the model parameters and the likelihood are unified, providing a benchmark for forthcoming dark matter searches performed by neutrino telescopes.

关键词： Cosmic rays & astroparticles Extrasolar neutrino astronomy Particle dark matter Neutrino detectors

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