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Accelerating internet penetration to rural areas: A government-sponsored internet-kiosks deployment project in Garut Regency, West Java of Indonesia

Accelerating internet penetration to rural areas: A governme...

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International Conference on Telecommunication Systems, Services, and Applications (TSSA)

作者： A. Kurniawan I. Zakia E. Wartika A.G. Austin School of Electrical Engineering and Informatics Institut Teknologi Bandung Bandung Indonesia Study Program of Film and Television Institut Seni Budaya Bandung Bandung Indonesia Faculty of Civil Engineering and Environment Institut Teknologi Bandung Bandung Indonesia

Internet penetration in developing countries depend on a variety of factors, including the Gross Domestic Product (GDP), the density of telephone connections, and the density of personal computer users. Internet kiosks have been deployed in 21 rural ditrict areas of Garut Regency to facilitate internet access for local/district government as well as for the community who have no access to internet Each district was equiped with 10 PCs, a printer, a scanner, and an internet connection either using DSL or cellular access technology. The program was government sponsored through the Ministry of Communications and Information of the Republic of Indonesia. This program was also designed to provide education and training for the district internet kiosks operator as well as for the staffs of information technology at Garut Regency, on understanding, efficient use, management, maintenance, as well as the ethical/professional use of information to upgrade their skills. This study was then conducted to evaluate factors affecting internet penetration in rural areas of Garut Regency, West Java of Indonesia.

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Coverage and capacity trade-off using admission and power controlled CDMA system for wireless internet services in rural environments

Coverage and capacity trade-off using admission and power co...

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International Conference on Telecommunication Systems, Services, and Applications (TSSA)

In this paper the coverage and capacity of CDMA system is evaluated using admission and power control to serve for low to medium speed internet services, such as digital TV or film/video streaming in rural areas. One of the unique characteristics of CDMA system is that it is possible to trade off between capacity and its coverage, called the cell-breathing. Open loop and closed loop power control can be used to increase the capacity of CDMA system; while admission control can be applied to trade-off between its capacity and the coverage. Computer simulation was conducted to evaluate the power control performance in Rayleigh fading channel. Then semi-analytical evaluation was performed to obtain the coverage-capacity trade-off. The result shows that the capacity of CDMA systems increases when power control was employed. Numerical and semi analytical evaluation show that CDMA coverage and capacity can be traded-off to meet various demand of traffic capacity and cell coverage in rural environments.

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Geological, isothermal, and isobaric 3-D model construction in early stage of geothermal exploration

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IOP Conference Series: Earth and Environmental Science 2016年第1期42卷

作者： M P Saputra Suryantini D Catigtig R Regandara S N Asnin A B Pratama Graduate Program in Geothermal Technology Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Engineering Geology Study Program Faculty of Earth Sciences and Technology Institut Teknologi Bandung Bandung 40132 Indonesia Emerging Power Inc. Philippines

Construction of geology, thermal anomaly and pressure distribution of a geothermal system in the early stage of exploration where data is limited is described using a 3-D software, Leapfrog Geothermal. The geological 3-D model was developed from a topographic map (derived from DEM data), geological map and literature studies reported in an early geological survey. The isothermal 3-D model was constructed using reservoir temperature estimation from geothermometry calculated from chemical analyses on surface manifestations, available shallow gradient temperature hole data and the normal gradient temperature (3°C/100m) for a nonthermal area. The isobaric 3-D model was built using hydrostatic pressure where the hydrostatic pressure is determined by the product of the fluid density, acceleration due to gravity, and depth. Fluid density is given by saturated liquid density as a function of temperature. There are some constraints on the modelling result such as (1) within the predicted reservoir, the geothermal gradient is not constant but continues to increase, thus, creating an anomalously high temperature at depth, and (2) the lithology model is made by interpolating and extrapolating cross-sections whereas usually only two to three geology sections were available for this study. Hence, the modeller must understand the geology. An additional cross section was developed by the modeller which may not be as suitable as the geologist constructed sections. The results of this study can be combined with geophysical data such as gravity, geomagnetic, micro-tremor and resistivity data. The combination of geological, geochemical, isothermal, isobaric and geophysical data could be used in (1) estimating the geometry and size of the geothermal reservoir, (2) predicting the depth of top reservoir, and (3) creating well prognosis for exploration and production wells.

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Database analysis and design learning tool based on problem/project-based learning

Database analysis and design learning tool based on problem/...

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International Conference on Data and Software engineering (ICODSE)

作者： Ruth Nattassha Fazat Nur Azizah Informatics/Computer Science Study Program School of Electrical Engineering and Informatics Institut Teknologi Bandung Bandung Indonesia Institut Teknologi Bandung Bandung Jawa Barat ID

The study of database analysis and design is typically a core in an informatics/computer science undergraduate/postgraduate study program. However, a survey conducted by Connolly in 2005 concluded that in Europe, companies considered the skill of database design is the most lacking skill in IT graduate recruits. To overcome the problem, Connolly and Begg in 2006 proposed the problem/project-based learning as an approach to study database design. This paper presents our work on a learning tool on the database analysis and design, focusing on the data requirement analysis and conceptual data modeling phase. The tool is designed based on the principles of problem/project-based learning by Connolly and Begg. The learning tool is developed on top of Moodle Learning Management System (LMS) by creating a new plug-in for data modeling called DBDesign. We conducted some interviews to a number of teachers and students of informatics/computer engineering study programs to obtain some opinions about the usefulness of the learning tool in improving the database analysis and design skills. All respondents agree that the tool will help students in learning database analysis and design. Nevertheless, some features are considered to be less important than others to be provided in such database learning tool; therefore, further study is required on the features.

关键词： Databases Data models Erbium Syntactics Object oriented modeling Analytical models Interviews

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Indirect search for dark matter from the Galactic Center and halo with the Super-Kamiokande detector

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Physical Review D 2020年第7期102卷 072002-072002页

作者： K. Abe C. Bronner Y. Haga Y. Hayato M. Ikeda S. Imaizumi H. Ito K. Iyogi J. Kameda Y. Kataoka Y. Kato Y. Kishimoto Ll. Marti M. Miura S. Moriyama T. Mochizuki Y. Nagao M. Nakahata Y. Nakajima T. Nakajima S. Nakayama T. Okada K. Okamoto A. Orii G. Pronost H. Sekiya M. Shiozawa Y. Sonoda A. Takeda A. Takenaka H. Tanaka S. Tasaka T. Tomura K. Ueno T. Yano T. Yokozawa R. Akutsu S. Han T. Irvine T. Kajita I. Kametani K. P. Lee T. McLachlan K. Okumura E. Richard T. Tashiro R. Wang J. Xia D. Bravo-Berguño L. Labarga P. Fernandez F. d. M. Blaszczyk J. Gustafson C. Kachulis E. Kearns J. L. Raaf J. L. Stone L. R. Sulak S. Sussman L. Wan T. Wester S. Berkman S. Tobayama J. Bian G. Carminati M. Elnimr N. J. Griskevich W. R. Kropp S. Locke S. Mine A. Renshaw M. B. Smy H. W. Sobel V. Takhistov P. Weatherly B. L. Hartfiel J. Hill W. E. Keig N. Hong J. Y. Kim I. T. Lim R. G. Park T. Akiri B. Bodur A. Himmel Z. Li E. O’Sullivan K. Scholberg C. W. Walter T. Wongjirad A. Coffani O. Drapier S. El Hedri A. Giampaolo M. Gonin J. Imber Th. A. Mueller P. Paganini B. Quilain T. Ishizuka T. Nakamura J. S. Jang K. Choi J. G. Learned S. Matsuno S. N. Smith J. Amey L. H. V. Anthony R. P. Litchfield W. Y. Ma A. A. Sztuc Y. Uchida M. O. Wascko V. Berardi M. G. Catanesi R. A. Intonti E. Radicioni N. F. Calabria L. N. Machado G. De Rosa G. Collazuol F. Iacob M. Lamoureux N. Ospina L. Ludovici T. Boschi F. Di Lodovico S. Molina Sedgwick S. Zsoldos Y. Nishimura S. Cao M. Friend T. Hasegawa T. Ishida T. Ishii T. Kobayashi T. Nakadaira K. Nakamura Y. Oyama K. Sakashita T. Sekiguchi T. Tsukamoto KE. Abe M. Hasegawa Y. Isobe H. Miyabe Y. Nakano T. Shiozawa T. Sugimoto A. T. Suzuki Y. Takeuchi S. Yamamoto A. Ali Y. Ashida T. Hayashino T. Hiraki S. Hirota K. Huang K. Ieki M. Jiang T. Kikawa M. Mori A. Murakami KE. Nakamura T. Nakaya N. D. Patel K. Suzuki S. Takahashi K. Tateishi R. A. Wendell N. McCauley P. Mehta A. Pritchard K. M. Tsui Y. Fukuda Y. Itow H. Menjo G. Mitsuka M. Murase F. Muto T. Niwa K. Sato T. Suzuki M. Taani M. Tsukada P. Mijakowski K. Kamioka Observatory Institute for Cosmic Ray Research University of Tokyo Kamioka Gifu 506-1205 Japan Kavli Institute for the Physics and Mathematics of the Universe (WPI) The University of Tokyo Institutes for Advanced Study University of Tokyo Kashiwa Chiba 277-8583 Japan Department of Physics Yokohama National University Yokohama Kanagawa 240-8501 Japan Research Center for Cosmic Neutrinos Institute for Cosmic Ray Research University of Tokyo Kashiwa Chiba 277-8582 Japan Department of Theoretical Physics University Autonoma Madrid 28049 Madrid Spain Department of Physics Boston University Boston Massachusetts 02215 USA Department of Physics and Astronomy University of British Columbia Vancouver British Columbia V6T1Z4 Canada Department of Physics and Astronomy University of California Irvine Irvine California 92697-4575 USA Department of Physics California State University Dominguez Hills Carson California 90747 USA Institute for Universe and Elementary Particles Chonnam National University Gwangju 61186 Korea Department of Physics Duke University Durham North Carolina 27708 USA Ecole Polytechnique IN2P3-CNRS Laboratoire Leprince-Ringuet F-91120 Palaiseau France Junior College Fukuoka Institute of Technology Fukuoka Fukuoka 811-0295 Japan Department of Physics Gifu University Gifu Gifu 501-1193 Japan GIST College Gwangju Institute of Science and Technology Gwangju 61005 Korea Department of Physics and Astronomy University of Hawaii Honolulu Hawaii 96822 USA Department of Physics Imperial College London London SW7 2AZ United Kingdom Dipartimento Interuniversitario di Fisica INFN Sezione di Bari and Università e Politecnico di Bari I-70125 Bari Italy Dipartimento di Fisica INFN Sezione di Napoli and Università di Napoli I-80126 Napoli Italy Dipartimento di Fisica INFN Sezione di Padova and Università di Padova I-35131 Padova Italy INFN Sezione di Roma and Università di Roma “La Sapienza” I-00185 Roma Italy Department of Physics King

We present a search for an excess of neutrino interactions due to dark matter in the form of weakly interacting massive particles (WIMPs) annihilating in the Galactic center or halo based on the data set of Super-Kamiokande-I, -II, -III and -IV taken from 1996 to 2016. We model the neutrino flux, energy, and flavor distributions assuming WIMP self-annihilation is dominant to νν¯, μ+μ−, bb¯, or W+W−. The excess is in comparison to atmospheric neutrino interactions which are modeled in detail and fit to data. Limits on the self-annihilation cross section ⟨σAV⟩ are derived for WIMP masses in the range 1 GeV to 10 TeV, reaching as low as 9.6×10−23 cm3 s−1 for 5 GeV WIMPs in bb¯ mode and 1.2×10−24 cm3 s−1 for 1 GeV WIMPs in νν¯ mode. The obtained sensitivity of the Super-Kamiokande detector to WIMP masses below several tens of GeV is the best among similar indirect searches to date.

关键词： Neutrino oscillations Particle dark matter

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Search for dark matter signals towards a selection of recently detected DES dwarf galaxy satellites of the Milky Way with H.E.S.S.

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Physical Review D 2020年第6期102卷 062001-062001页

作者： H. Abdallah R. Adam F. Aharonian F. Ait Benkhali E. O. Angüner M. Arakawa C. Arcaro C. Armand T. Armstrong H. Ashkar M. Backes V. Baghmanyan V. Barbosa Martins A. Barnacka M. Barnard Y. Becherini D. Berge K. Bernlöhr M. Böttcher C. Boisson J. Bolmont S. Bonnefoy M. Breuhaus J. Bregeon F. Brun P. Brun M. Bryan M. Büchele T. Bulik T. Bylund S. Caroff A. Carosi S. Casanova T. Chand S. Chandra A. Chen G. Cotter M. Curyło I. D. Davids J. Davies C. Deil J. Devin P. deWilt L. Dirson A. Djannati-Ataï A. Dmytriiev A. Donath V. Doroshenko J. Dyks K. Egberts F. Eichhorn G. Emery J.-P. Ernenwein S. Eschbach K. Feijen S. Fegan A. Fiasson G. Fontaine S. Funk M. Füßling S. Gabici Y. A. Gallant G. Giavitto L. Giunti D. Glawion J. F. Glicenstein D. Gottschall M.-H. Grondin J. Hahn M. Haupt G. Hermann J. A. Hinton W. Hofmann C. Hoischen T. L. Holch M. Holler M. Hörbe D. Horns D. Huber H. Iwasaki M. Jamrozy D. Jankowsky F. Jankowsky A. Jardin-Blicq V. Joshi I. Jung-Richardt M. A. Kastendieck K. Katarzyński M. Katsuragawa U. Katz D. Khangulyan B. Khélifi S. Klepser W. Kluźniak Nu. Komin R. Konno K. Kosack D. Kostunin M. Kreter G. Lamanna A. Lemière M. Lemoine-Goumard J.-P. Lenain E. Leser C. Levy T. Lohse I. Lypova J. Mackey J. Majumdar D. Malyshev V. Marandon P. Marchegiani A. Marcowith A. Mares G. Martì-Devesa R. Marx G. Maurin P. J. Meintjes R. Moderski M. Mohamed L. Mohrmann C. Moore P. Morris E. Moulin J. Muller T. Murach K. Nakashima S. Nakashima M. de Naurois H. Ndiyavala F. Niederwanger J. Niemiec L. Oakes P. O’Brien H. Odaka S. Ohm E. de Ona Wilhelmi M. Ostrowski M. Panter R. D. Parsons B. Peyaud Q. Piel S. Pita V. Poireau A. Priyana Noel D. A. Prokhorov H. Prokoph G. Pühlhofer M. Punch A. Quirrenbach S. Raab R. Rauth A. Reimer O. Reimer Q. Remy M. Renaud F. Rieger L. Rinchiuso C. Romoli G. Rowell B. Rudak E. Ruiz-Velasco V. Sahakian S. Sailer S. Saito D. A. Sanchez A. Santangelo M. Sasaki M. Scalici F. Schüssler H. M. Schutter U. Schwanke S. Schwemmer M. Seglar-Arroyo M. Senniappan A. S. Seyffert N. Shafi K. Shiningayamwe Centre for Space Research North-West University Potchefstroom 2520 South Africa Laboratoire Leprince-Ringuet cole Polytechnique CNRS Institut Polytechnique de Paris F-91128 Palaiseau France Max-Planck-Institut für Kernphysik P.O. Box 103980 D 69029 Heidelberg Germany Dublin Institute for Advanced Studies 31 Fitzwilliam Place Dublin 2 Ireland High Energy Astrophysics Laboratory RAU 123 Hovsep Emin Street Yerevan 0051 Armenia Aix Marseille Université CNRS/IN2P3 CPPM 13288 Marseille France Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima-ku Tokyo 171-8501 Japan Laboratoire d’Annecy de Physique des Particules Université Grenoble Alpes Université Savoie Mont Blanc CNRS LAPP 74000 Annecy France University of Oxford Department of Physics Denys Wilkinson Building Keble Road Oxford OX1 3RH United Kingdom IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France University of Namibia Department of Physics Private Bag 13301 Windhoek Namibia Instytut Fizyki Jądrowej PAN ul. Radzikowskiego 152 31-342 Kraków Poland DESY D-15738 Zeuthen Germany Obserwatorium Astronomiczne Uniwersytet Jagiellonski ul. Orla 171 30-244 Kraków Poland Department of Physics and Electrical Engineering Linnaeus University 351 95 Växjö Sweden LUTH Observatoire de Paris PSL Research University CNRS Université Paris Diderot 5 Place Jules Janssen 92190 Meudon France Sorbonne Université Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Laboratoire de Physique Nucléaire et de Hautes Energies LPNHE 4 Place Jussieu F-75252 Paris France Laboratoire Univers et Particules de Montpellier Université Montpellier CNRS/IN2P3 CC 72 Place Eugène Bataillon F-34095 Montpellier Cedex 5 France GRAPPA Anton Pannekoek Institute for Astronomy and Institute of High-Energy Physics University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Centre for Astroparticle Physics Erwin-Rommel-Straß

Dwarf spheroidal galaxy satellites of the Milky Way are prime targets for indirect detection of dark matter with gamma rays due to their proximity, high dark matter content, and absence of nonthermal emission processes. Recently, the Dark Energy Survey (DES) revealed the existence of new ultrafaint dwarf spheroidal galaxies in the southern-hemisphere sky, therefore ideally located for ground-based observations with the imaging atmospheric Cherenkov telescope array H.E.S.S. We present a search for very-high-energy (E≳100 GeV) gamma-ray emission using H.E.S.S. observations carried out recently towards Reticulum II, Tucana II, Tucana III, Tucana IV, and Grus II satellites. No significant very-high-energy gamma-ray excess is found from the observations on any individual object nor in the combined analysis of all the datasets. Using the most recent modeling of the dark matter distribution in the dwarf galaxy halo, we compute for the first time on DES satellites individual and combined constraints from Cherenkov telescope observations on the annihilation cross section of dark matter particles in the form of Weakly Interacting Massive Particles. The combined 95% C.L. observed upper limits reach ⟨σv⟩≃1×10−23 cm3 s−1 in the W+W− channel and 4×10−26 cm3 s−1 in the γγ channels for a dark matter mass of 1.5 TeV. The H.E.S.S. constraints well complement the results from Fermi-LAT, HAWC, MAGIC, and VERITAS and are currently the most stringent in the γγ channels in the multi-GeV/multi-TeV mass range.

关键词： Dark matter Gamma ray astronomy Particle astrophysics Telescopes

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Search for resonances decaying into a weak vector boson and a Higgs boson in the fully hadronic final state produced in proton−proton collisions at s=13 TeV with the ATLAS detector

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Physical Review D 2020年第11期102卷 112008-112008页

作者： G. Aad B. Abbott D. C. Abbott A. Abed Abud K. Abeling D. K. Abhayasinghe S. H. Abidi O. S. AbouZeid N. L. Abraham H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya B. Achkar L. Adam C. Adam Bourdarios L. Adamczyk L. Adamek J. Adelman M. Adersberger A. Adiguzel S. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras A. Aggarwal C. Agheorghiesei J. A. Aguilar-Saavedra A. Ahmad F. Ahmadov W. S. Ahmed X. Ai G. Aielli S. Akatsuka M. Akbiyik T. P. A. Åkesson E. Akilli A. V. Akimov K. Al Khoury G. L. Alberghi J. Albert M. J. Alconada Verzini S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob B. Ali S. Ali M. Aliev G. Alimonti C. Allaire B. M. M. Allbrooke B. W. Allen P. P. Allport A. Aloisio F. Alonso C. Alpigiani E. Alunno Camelia M. Alvarez Estevez M. G. Alviggi Y. Amaral Coutinho A. Ambler L. Ambroz C. Amelung D. Amidei S. P. Amor Dos Santos S. Amoroso C. S. Amrouche F. An C. Anastopoulos N. Andari T. Andeen J. K. Anders S. Y. Andrean A. Andreazza V. Andrei C. R. Anelli S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio Bella N. Aranzabal Barrio V. Araujo Ferraz R. Araujo Pereira C. Arcangeletti A. T. H. Arce F. A. Arduh J-F. Arguin S. Argyropoulos J.-H. Arling A. J. Armbruster A. Armstrong O. Arnaez H. Arnold Z. P. Arrubarrena Tame G. Artoni H. Asada K. Asai S. Asai T. Asawatavonvanich N. Asbah E. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. B. Atlay H. Atmani K. Augsten V. A. Austrup G. Avolio M. K. Ayoub G. Azuelos H. Bachacou K. Bachas M. Backes F. Backman P. Bagnaia M. Bahmani H. Bahrasemani A. J. Bailey V. R. Bailey J. T. Baines C. Bakalis O. K. Baker P. J. Bakker E. Bakos D. Bakshi Gupta S. Balaji R. Balasubramanian E. M. Baldin P. Balek F. Balli W. K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay Sw. Banerjee L. Barak W. M. Barbe E. L. Barberio D. Barberis M. Barbero CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto ON Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Université Grenoble Alpes Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University Nijmegen/Nikhef Nijmegen Netherlands Department of Physics Alexandru Ioan Cuza U

A search for heavy resonances decaying into a W or Z boson and a Higgs boson produced in proton−proton collisions at the Large Hadron Collider at s=13 TeV is presented. The analysis utilizes the dominant W→qq¯′ or Z→qq¯ and H→bb¯ decays with substructure techniques applied to large-radius jets. A sample corresponding to an integrated luminosity of 139 fb−1 collected with the ATLAS detector is analyzed and no significant excess of data is observed over the background prediction. The results are interpreted in the context of the heavy vector triplet model with spin-1 W′ and Z′ bosons. Upper limits on the cross section are set for resonances with mass between 1.5 and 5.0 TeV, ranging from 6.8 to 0.53 fb for W′→WH and from 8.7 to 0.53 fb for Z′→ZH at the 95% confidence level.

关键词： Hypothetical particle physics models Particle data analysis

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Search for Higgs boson decays into two new low-mass spin-0 particles in the 4b channel with the ATLAS detector using pp collisions at s=13 TeV

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Physical Review D 2020年第11期102卷 112006-112006页

作者： G. Aad B. Abbott D. C. Abbott A. Abed Abud K. Abeling D. K. Abhayasinghe S. H. Abidi O. S. AbouZeid N. L. Abraham H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya B. Achkar L. Adam C. Adam Bourdarios L. Adamczyk L. Adamek J. Adelman M. Adersberger A. Adiguzel S. Adorni T. Adye A. A. Affolder Y. Afik C. Agapopoulou M. N. Agaras A. Aggarwal C. Agheorghiesei J. A. Aguilar-Saavedra A. Ahmad F. Ahmadov W. S. Ahmed X. Ai G. Aielli S. Akatsuka M. Akbiyik T. P. A. Åkesson E. Akilli A. V. Akimov K. Al Khoury G. L. Alberghi J. Albert M. J. Alconada Verzini S. Alderweireldt M. Aleksa I. N. Aleksandrov C. Alexa T. Alexopoulos A. Alfonsi F. Alfonsi M. Alhroob B. Ali S. Ali M. Aliev G. Alimonti C. Allaire B. M. M. Allbrooke B. W. Allen P. P. Allport A. Aloisio F. Alonso C. Alpigiani E. Alunno Camelia M. Alvarez Estevez M. G. Alviggi Y. Amaral Coutinho A. Ambler L. Ambroz C. Amelung D. Amidei S. P. Amor Dos Santos S. Amoroso C. S. Amrouche F. An C. Anastopoulos N. Andari T. Andeen J. K. Anders S. Y. Andrean A. Andreazza V. Andrei C. R. Anelli S. Angelidakis A. Angerami A. V. Anisenkov A. Annovi C. Antel M. T. Anthony E. Antipov M. Antonelli D. J. A. Antrim F. Anulli M. Aoki J. A. Aparisi Pozo M. A. Aparo L. Aperio Bella N. Aranzabal V. Araujo Ferraz R. Araujo Pereira C. Arcangeletti A. T. H. Arce F. A. Arduh J-F. Arguin S. Argyropoulos J.-H. Arling A. J. Armbruster A. Armstrong O. Arnaez H. Arnold Z. P. Arrubarrena Tame G. Artoni K. Asai S. Asai T. Asawatavonvanich N. Asbah E. M. Asimakopoulou L. Asquith J. Assahsah K. Assamagan R. Astalos R. J. Atkin M. Atkinson N. B. Atlay H. Atmani K. Augsten V. A. Austrup G. Avolio M. K. Ayoub G. Azuelos H. Bachacou K. Bachas M. Backes F. Backman P. Bagnaia M. Bahmani H. Bahrasemani A. J. Bailey V. R. Bailey J. T. Baines C. Bakalis O. K. Baker P. J. Bakker E. Bakos D. Bakshi Gupta S. Balaji E. M. Baldin P. Balek F. Balli W. K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay Sw. Banerjee L. Barak W. M. Barbe E. L. Barberio D. Barberis M. Barbero G. Barbour T. Barillari M-S. Barisi CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Department of Physics University of Massachusetts Amherst Massachusetts USA CERN Geneva Switzerland II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Department of Physics Royal Holloway University of London Egham United Kingdom Department of Physics University of Toronto Toronto ON Canada Niels Bohr Institute University of Copenhagen Copenhagen Denmark 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 High Energy Physics Division Argonne National Laboratory Argonne Illinois USA INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Institut für Physik Universität Mainz Mainz Germany LAPP Université Grenoble Alpes Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Department of Physics Bogazici University Istanbul Turkey Département de Physique Nucléaire et Corpusculaire Université de Genève Genève Switzerland Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA IJCLab Université Paris-Saclay CNRS/IN2P3 91405 Orsay France LPC Université Clermont Auvergne CNRS/IN2P3 Clermont-Ferrand France Institute for Mathematics Astrophysics and Particle Physics Radboud University Nijmegen/Nikhef Nijmegen Netherlands Department of Physics Alexandru Ioan Cuza U

This paper describes a search for beyond the Standard Model decays of the Higgs boson into a pair of new spin-0 particles subsequently decaying into b-quark pairs, H→aa→(bb¯)(bb¯), using proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at center-of-mass energy s=13 TeV. This search focuses on the range 15 GeV≤ma≤30 GeV, where the decay products are collimated; it is complementary to a previous search in the same final state targeting the range 20 GeV≤ma≤60 GeV, where the decay products are well separated. A novel strategy for the identification of the a→bb¯ decays is deployed to enhance the efficiency for topologies with small separation angles. The search is performed with 36 fb−1 of integrated luminosity collected in 2015 and 2016 and sets upper limits on the production cross section of H→aa→(bb¯)(bb¯), where the Higgs boson is produced in association with a Z boson.

关键词： Extensions of Higgs sector Particle interactions Higgs bosons Hadron colliders Particle data analysis

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Search for astronomical neutrinos from blazar TXS0506+056 in Super-Kamiokande

arXiv

引用

arXiv 2019年

作者： Hagiwara, K. Abe, K. Bronner, C. Hayato, Y. Ikeda, M. Ito, H. Kameda, J. Kataoka, Y. Kato, Y. Kishimoto, Y. Marti, Ll. Miura, M. Moriyama, S. Mochizuki, T. Nakahata, M. Nakajima, Y. Nakayama, S. Okada, T. Okamoto, K. Orii, A. Pronost, G. Sekiya, H. Shiozawa, M. Sonoda, Y. Takeda, A. Takenaka, A. Tanaka, H. Yano, T. Akutsu, R. Kajita, T. Okumura, K. Wang, R. Xia, J. Bravo-Berguño, D. Labarga, L. Fernandez, P. Kearns, E. Raaf, J.L. Stone, J.L. Wan, L. Wester, T. Bian, J. Griskevich, N.J. Kropp, W.R. Locke, S. Mine, S. Smy, M.B. Sobel, H.W. Takhistov, V. Weatherly, P. Ganezer, K.S. Hill, J. Kim, J.Y. Lim, I.T. Park, R.G. Bodur, B. Scholberg, K. Walter, C.W. Coffani, A. Drapier, O. Gonin, M. Mueller, Th.A. Paganini, P. Ishizuka, T. Nakamura, T. Jang, J.S. Learned, J.G. Matsuno, S. Litchfield, R.P. Sztuc, A.A. Uchida, Y. Berardi, V. Calabria, N.F. Catanesi, M.G. Radicioni, E. de Rosa, G. Collazuol, G. Iacob, F. Ludovici, L. Nishimura, Y. Cao, S. Friend, M. Hasegawa, T. Ishida, T. Kobayashi, T. Nakadaira, T. Nakamura, K. Oyama, Y. Sakashita, K. Sekiguchi, T. Tsukamoto, T. Hasegawa, M. Isobe, Y. Miyabe, H. Nakano, Y. Shiozawa, T. Sugimoto, T. Suzuki, A.T. Takeuchi, Y. Ali, A. Ashida, Y. Hirota, S. Jiang, M. Kikawa, T. Mori, M. Nakamura, K.E. Nakaya, T. Wendell, R.A. Anthony, L.H.V. McCauley, N. Pritchard, A. Tsui, K.M. Fukuda, Y. Itow, Y. Niwa, T. Taani, M. Tsukada, M. Mijakowski, P. Frankiewicz, K. Jung, C.K. Vilela, C. Wilking, M.J. Yanagisawa, C. Fukuda, D. Harada, M. Horai, T. Ishino, H. Ito, S. Koshio, Y. Sakuda, M. Takahira, Y. Xu, C. Kuno, Y. Cook, L. Simpson, C. Wark, D. Di Lodovico, F. Molina Sedgwick, S. Richards, B. Zsoldos, S. Kim, S.B. Thiesse, M. Thompson, L. Okazawa, H. Choi, Y. Nishijima, K. Koshiba, M. Yokoyama, M. Goldsack, A. Martens, K. Quilain, B. Suzuki, Y. Vagins, M.R. Kuze, M. Tanaka, M. Yoshida, T. Ishitsuka, M. Matsumoto, R. Ohta, K. Martin, J.F. Nantais, C.M. Tanaka, H.A. Towstego, T. Hartz, M. Konaka, A. de Perio, P. Chen, S. Jamieson, B. Walker, J. Minamino, A. Okamoto, K. Pintaudi, G. Department of Physics Okayama University Okayama Okayama700-8530 Japan Kamioka Observatory Institute for Cosmic Ray Research University of Tokyo Kamioka Gifu506-1205 Japan Research Center for Cosmic Neutrinos Institute for Cosmic Ray Research University of Tokyo KashiwaChiba277-8582 Japan Department of Theoretical Physics University Autonoma Madrid Madrid28049 Spain Department of Physics Boston University BostonMA02215 United States Department of Physics and Astronomy University of California Irvine IrvineCA92697-4575 United States Department of Physics California State University Dominguez Hills CarsonCA90747 United States Department of Physics Chonnam National University Kwangju500-757 Korea Republic of Department of Physics Duke University DurhamNC27708 United States Ecole Polytechnique IN2P3-CNRS Laboratoire Leprince-Ringuet PalaiseauF-91120 France Junior College Fukuoka Institute of Technology FukuokaFukuoka811-0295 Japan Department of Physics Gifu University Gifu Gifu501-1193 Japan GIST College Gwangju Institute of Science and Technology Gwangju500-712 Korea Republic of Department of Physics and Astronomy University of Hawaii HonoluluHI96822 United States Department of Physics Imperial College London LondonSW7 2AZ United Kingdom Dipartimento Interuniversitario di Fisica INFN Sezione di Bari Università e Politecnico di Bari BariI-70125 Italy Dipartimento di Fisica INFN Sezione di Napoli Università di Napoli NapoliI-80126 Italy Dipartimento di Fisica INFN Sezione di Padova Università di Padova PadovaI-35131 Italy INFN Sezione di Roma Università di Roma "La Sapienza" RomaI-00185 Italy Department of Physics King’s College London LondonWC2R 2LS United Kingdom Department of Physics Keio University Yokohama Kanagawa223-8522 Japan TsukubaIbaraki305-0801 Japan Department of Physics Kobe University Kobe Hyogo657-8501 Japan Department of Physics Kyoto University Kyoto Kyoto606-8502 Japan Department o

We report a search for astronomical neutrinos in the energy region from several GeV to TeV in the direction of the blazar TXS0506+056 using the Super-Kamiokande detector following the detection of a 100 TeV neutrino from the same location by the IceCube collaboration. Using Super-Kamiokande neutrino data across several data samples observed from April 1996 to February 2018 we have searched for both a total excess above known backgrounds across the entire period as well as localized excesses on smaller time scales in that interval. No significant excess nor significant variation in the observed event rate are found in the blazar direction. Upper limits are placed on the electron and muon neutrino fluxes at 90% confidence level as 6.0 × 10−7 and 4.5 × 10−7 to 9.3 × 10−10 [erg/cm2/s], respectively. Copyright © 2019, The Authors. All rights reserved.

关键词： Neutrons

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Measurement of neutrino-oxygen neutral-current quasi-elastic cross section using atmospheric neutrinos at Super-Kamiokande

arXiv

引用

arXiv 2019年

作者： Wan, L. Abe, K. Bronner, C. Hayato, Y. Ikeda, M. Iyogi, K. Kameda, J. Kato, Y. Kishimoto, Y. Marti, Ll. Miura, M. Moriyama, S. Mochizuki, T. Nakahata, M. Nakajima, Y. Nakano, Y. Nakayama, S. Okada, T. Okamoto, K. Orii, A. Pronost, G. Sekiya, H. Shiozawa, M. Sonoda, Y. Takeda, A. Takenaka, A. Tanaka, H. Yano, T. Akutsu, R. Kajita, T. Nishimura, Y. Okumura, K. Wang, R. Xia, J. Labarga, L. Fernandez, P. Blaszczyk, F.D.M. Kachulis, C. Kearns, E. Raaf, J.L. Stone, J.L. Sussman, S. Berkman, S. Bian, J. Griskevich, N.J. Kropp, W.R. Locke, S. Mine, S. Weatherly, P. Smy, M.B. Sobel, H.W. Takhistov, V. Ganezer, K.S. Hill, J. Kim, J.Y. Lim, I.T. Park, R.G. Bodur, B. Scholberg, K. Walter, C.W. Gonin, M. Imber, J. Mueller, Th.A. Ishizuka, T. Nakamura, T. Jang, J.S. Choi, K. Learned, J.G. Matsuno, S. Litchfield, R.P. Uchida, Y. Wascko, M.O. Calabria, N.F. Catanesi, M.G. Intonti, R.A. Radicioni, E. de Rosa, G. Ali, A. Collazuol, G. Iacob, F. Ludovici, L. Cao, S. Friend, M. Hasegawa, T. Ishida, T. Kobayashi, T. Nakadaira, T. Nakamura, K. Oyama, Y. Sakashita, K. Sekiguchi, T. Tsukamoto, T. Abe, K.E. Hasegawa, M. Isobe, Y. Miyabe, H. Sugimoto, T. Suzuki, A.T. Takeuchi, Y. Ashida, Y. Hayashino, T. Hirota, S. Jiang, M. Kikawa, T. Mori, M. Nakamura, K.E. Nakaya, T. Wendell, R.A. Anthony, L.H.V. McCauley, N. Pritchard, A. Tsui, K.M. Fukuda, Y. Itow, Y. Murrase, M. Mijakowski, P. Frankiewicz, K. Jung, C.K. Li, X. Palomino, J.L. Santucci, G. Vilela, C. Wilking, M.J. Yanagisawa, C. Fukuda, D. Hagiwara, K. Ishino, H. Ito, S. Koshio, Y. Sakuda, M. Takahira, Y. Xu, C. Kuno, Y. Simpson, C. Wark, D. Di Lodovico, F. Richards, B. Sedgwick, S. Molina Tacik, R. Kim, S.B. Thiesse, M. Thompson, L. Okazawa, H. Choi, Y. Nishijima, K. Koshiba, M. Yokoyama, M. Goldsack, A. Martens, K. Murdoch, M. Quilain, B. Suzuki, Y. Vagins, M.R. Kuze, M. Okajima, Y. Yoshida, T. Ishitsuka, M. Martin, J.F. Nantais, C.M. Tanaka, H.A. Towstego, T. Hartz, M. Konaka, A. de Perio, P. Chen, S. Minamino, A. Kamioka Observatory Institute for Cosmic Ray Research University of Tokyo Kamioka Gifu506-1205 Japan Research Center for Cosmic Neutrinos Institute for Cosmic Ray Research University of Tokyo KashiwaChiba277-8582 Japan Department of Theoretical Physics University Autonoma Madrid Madrid28049 Spain Department of Physics Boston University BostonMA02215 United States Department of Physics and Astronomy University of British Columbia VancouverBCV6T1Z4 Canada Department of Physics and Astronomy University of California Irvine IrvineCA92697-4575 United States Department of Physics California State University Dominguez Hills CarsonCA90747 United States Department of Physics Chonnam National University Kwangju500-757 Korea Republic of Department of Physics Duke University DurhamNC27708 United States Ecole Polytechnique IN2P3-CNRS Laboratoire Leprince-Ringuet PalaiseauF-91120 France Junior College Fukuoka Institute of Technology FukuokaFukuoka811-0295 Japan Department of Physics Gifu University Gifu Gifu501-1193 Japan GIST College Gwangju Institute of Science and Technology Gwangju500-712 Korea Republic of Department of Physics and Astronomy University of Hawaii HonoluluHI96822 United States Department of Physics Imperial College London LondonSW7 2AZ United Kingdom Dipartimento Interuniversitario di Fisica INFN Sezione di Bari Università e Politecnico di Bari BariI-70125 Italy Dipartimento di Fisica INFN Sezione di Napoli Università di Napoli NapoliI-80126 Italy Dipartimento di Fisica INFN Sezione di Padova Università di Padova PadovaI-35131 Italy INFN Sezione di Roma Università di Roma "La Sapienza" RomaI-00185 Italy TsukubaIbaraki305-0801 Japan Department of Physics Kobe University Kobe Hyogo657-8501 Japan Department of Physics Kyoto University Kyoto Kyoto606-8502 Japan Department of Physics University of Liverpool LiverpoolL69 7ZE United Kingdom Department of Physics Miyagi University of Education Sendai

Neutral current (NC) interactions of atmospheric neutrinos on oxygen form one of the major backgrounds in the search for supernova relic neutrinos with water-based Cherenkov detectors. The NC channel is dominated by neutrino quasi-elastic (NCQE) scattering off nucleons inside 16O nuclei. In this paper we report the first measurement of NCQE cross section using atmospheric neutrinos at Super-Kamiokande (SK). The measurement used 2,778 live days of SK-IV data with a fiducial volume of 22.5 kiloton water. Within the visible energy window of 7.5-29.5 MeV, we observed 117 events compared to the expected 71.9 NCQE signal and 53.1 background events. Weighted by the atmospheric neutrino spectrum from 160 MeV to 10 GeV, the flux averaged NCQE cross section is measured to be (1.01 ± 0.17(stat.)+0−0..7830(sys.)) × 10−38 cm2. Copyright © 2019, The Authors. All rights reserved.

关键词： Oxygen

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