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High effective generation and detection of THz waves using a laser chaos and a super-focusing with metal V-grooved waveguides

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High effective generation and detection of THz waves using a...

International Conference on infrared and Millimeter Waves

作者： Fumiyoshi Kuwashima Takuya Shirao Toshihiro Kishibata Yusuke Akamine Noriyuki Iwao Manatu Ooi Masahiko Tani Kazuyoshi Kurihara Kohji Yamamoto Takeshi Nagashima Makoto Nakajima Masanori Hangyo Department of Electrical Electronics and Computer Engineering Fukui University of Technology Fukui Japan Research Center for Development of Far-Infrared Region University of Fukui Fukui Japan Faculty of Education and Regional Studies University of Fukui Fukui Japan Setsunan University Neyagawa City Osaka Japan Institute of Laser Engineering Osaka University Osaka Japan

Generation of a wide-range THz waves are investigated from a photoconductive antenna excited using a chaotic oscillation multimode semiconductor laser with optical delayed feedback by an external mirror. The properties of the generated THz wave are compared with those of a case excited by a CW steady state laser. The stable THz wave is obtained from the multimode-laser diode excited photoconductive antenna by using a laser chaos. For a high sensitive detection, a metal V-grooved waveguide (MVG) is also used. The 1.6 times signal is detected using MVG compared with conventional system using Si lens.

关键词： Chaos Lenses Metals Optical waveguides Oscillators Mirrors Antennas

Fast Microwave-assisted Pretreatment for Bioconversion of Sawdust Lignocellulose to Glucose

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Journal of Physics: Conference Series 2017年第1期846卷

作者： I Nyoman Sudiana Seitaro Mitsudo Prima Endang Susilowati Desak Ketut Sutiari Made Widana Arsana Muhammad Zamrun Firihu La Ode Ngkoimani La Aba Erzam Sahaluddin Hasan Edi Cahyono Svilen Sabchevski Haji Aripin Komang Gde Suastika Department of Physics Faculty of Mathematic and Natural Science Halu Oleo University Kampus Bumi Tridharma AnduonohuKendari 93232Indonesia Research Center for Development of Far-Infrared Region University of Fukui3-9-1 Bunkyo Fukui-shi 910-8507Japan Department of Chemistry Faculty of Mathematic and Natural Science Halu Oleo University Kampus Bumi Tridharma AnduonohuKendari 93232Indonesia Department of Agrotechnology Faculty of Agriculture Halu Oleo University Kampus Bumi Tridharma AnduonohuKendari 93232Indonesia Department of Geophysics Faculty of Earth Sciences and Technology Halu Oleo University Kampus Bumi Tridharma AnduonohuKendari 93232Indonesia Department of Mathematics Faculty of Mathematic and Natural Science Halu Oleo University Kampus Bumi Tridharma AnduonohuKendari 93232Indonesia Lab. Plasma Physics and Engineering Institute of Electronics of Bulgarian Academy of SciencesBulgaria Center for Material Processing and Renewable Energy Faculty of Learning Teacher and Education Science Siliwangi UniversityJl. Siliwangi 24 Tasikmalaya 46115 West JavaIndonesia Department of Physics Education Palangka Raya University73112Indonesia

A preliminary study of application microwave energy for bioconversion of cellulosic sawdust to glucose was performed. The effects of the microwave were compared to those of the conventional method for each solvent. It was expected that a broader mechanism responsible for the microwave effects on the chemical processes, especially the pretreatment on the hydrolysis of cellulose can be explained. Reagents used were an acid (HCl), an alkali (NaOH), and distilled water (H2O). The experimental results showed that the microwave-assisted pretreatment on the lignocellulosic sawdust faster than by using conventional heating (hotplate). Moreover by using microwave a higher glucose content compared to the conventional method was found. With microwave during hydrolisis, high temperatures and high reagent concentrations were not required. Pretreatment with a microwave at 800 Watt and solvent NaOH 22,50 mg/mL at a temperature of 120°c appeared to be most efficient found in this experiment. These results indicate that microwave effective for bioconversion of cellulosic sawdust to glucose. The microstructure evaluation by using SEM and XRD should be performed to understand more detail the effect especially on their cellulosic structural evolution.

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Measurements of Higgs boson properties in the diphoton decay channel with 36 fb−1 of p p collision data at √s = 13 TeV with the ATLAS detector

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arXiv 2018年

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. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A.A. Afik, Y. 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. 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. Bakker, P.J. Bakshi Gupta, D. 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. Department of Physics University of Adelaide Adelaide Australia Physics Department SUNY Albany AlbanyNY United States Department of Physics University of Alberta EdmontonAB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics TOBB University of Economics and Technology Ankara Turkey LAPP CNRS/IN2P3 Université Savoie Mont Blanc Annecy-le-Vieux France High Energy Physics Division Argonne National Laboratory ArgonneIL United States Department of Physics University of Arizona TucsonAZ United States Department of Physics University of Texas at Arlington ArlingtonTX United States Physics Department National and Kapodistrian University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics The University of Texas at Austin AustinTX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory University of California BerkeleyCA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Istanbul Turkey Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia INFN Sezione di Bologna Bologna Italy Dipartimento di Fisica e Astronomia Un

Properties of the Higgs boson are measured in the two-photon final state using 36.1 fb−1 of proton–proton collision data recorded at √s = 13 TeV by the ATLAS experiment at the Large Hadron Collider. Cross-section measurements for the production of a Higgs boson through gluon–gluon fusion, vector-boson fusion, and in association with a vector boson or a top-quark pair are reported. The signal strength, defined as the ratio of the observed to the expected signal yield, is measured for each of these production processes as well as inclusively. The global signal strength measurement of 0.99 ± 0.14 improves on the precision of the ATLAS measurement at √s = 7 and 8 TeV by a factor of two. Measurements of gluon–gluon fusion and vector-boson fusion productions yield signal strengths compatible with the Standard Model prediction. Measurements of simplified template cross sections, designed to quantify the different Higgs boson production processes in specific regions of phase space, are reported. The cross section for the production of the Higgs boson decaying to two isolated photons in a fiducial region closely matching the experimental selection of the photons is measured to be 55 ± 10 fb, which is in good agreement with the Standard Model prediction of 64 ± 2 fb. Furthermore, cross sections in fiducial regions enriched in Higgs boson production in vector-boson fusion or in association with large missing transverse momentum, leptons or top-quark pairs are reported. Differential and double-differential measurements are performed for several variables related to the diphoton kinematics as well as the kinematics and multiplicity of the jets produced in association with a Higgs boson. These differential cross sections are sensitive to higher order QCD corrections and properties of the Higgs boson, such as its spin and CP quantum numbers. No significant deviations from a wide array of Standard Model predictions are observed. Finally, the strength and tensor structure of the Hig

关键词： Bosons

Prompt and non-prompt J/ψ and ψ(2S) suppression at high transverse momentum in 5.02 TeV Pb+Pb collisions with the ATLAS experiment

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arXiv 2018年

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. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A.A. Afik, Y. Agheorghiesei, C. Aguilar-Saavedra, J.A. Ahmadov, F. Aielli, G. Akatsuka, S. Åkesson, T.P.A. Akilli, E. Akimov, A.V. Alberghi, G.L. Albert, J. Albicocco, P. Alconada Verzini, M.J. Alderweireldt, S. Aleksa, M. Aleksandrov, I.N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, B. Aliev, M. Alimonti, G. Alison, J. Alkire, S.P. Allaire, C. 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. Ambroz, L. Amelung, C. Amidei, D. Amor Dos Santos, S.P. Amoroso, S. Amrouche, C.S. 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. Annovi, A. Antel, C. Anthony, M.T. Antonelli, M. Antrim, D.J.A. Anulli, F. Aoki, M. Aperio Bella, L. Arabidze, G. Arai, Y. Araque, J.P. Araujo Ferraz, V. Araujo Pereira, R. Arce, A.T.H. Ardell, R.E. Arduh, F.A. Arguin, J.-F. Argyropoulos, S. 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. Asimakopoulou, E.M. Asquith, L. Assamagan, K. Astalos, R. Atkin, R.J. Atkinson, M. Atlay, N.B. Augsten, K. Avolio, G. Avramidou, R. 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. Bailey, A.J. Baines, J.T. Bajic, M. Baker, O.K. Bakker, P.J. Bakshi Gupta, D. Baldin, E.M. Balek, P. Balli, F. Balunas, W.K. Banas, E. Bandyopadhyay, A. Banerjee, Sw. Bannoura, A.A.E. Barak, L. Barbe, W.M. Barberio, E.L. Barberis, D. Barbero, M. Barillari, T. Barisits, M.-S. Department of Physics University of Adelaide Adelaide Australia Physics Department SUNY Albany AlbanyNY United States Department of Physics University of Alberta EdmontonAB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics TOBB University of Economics and Technology Ankara Turkey LAPP Université Grenoble Alpes Université Savoie Mont Blanc CNRS/IN2P3 Annecy France High Energy Physics Division Argonne National Laboratory ArgonneIL United States Department of Physics University of Arizona TucsonAZ United States Department of Physics University of Texas at Arlington ArlingtonTX United States Physics Department National and Kapodistrian University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics The University of Texas at Austin AustinTX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory University of California BerkeleyCA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Istanbul Turkey Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia INFN Sezione di Bologna Bologna Italy Dipartimento di Fisic

A measurement of J/ψ and ψ(2S) production is presented. It is based on a data sample from Pb+Pb collisions at √sNN = 5.02 TeV and pp collisions at √s = 5.02 TeV recorded by the ATLAS detector at the LHC in 2015, corresponding to an integrated luminosity of 0.42 nb−1 and 25 pb−1 in Pb+Pb and pp, respectively. The measurements of per-event yields, nuclear modification factors, and non-prompt fractions are performed in the dimuon decay channel for 9 Tµµ µµ Copyright © 2018, The Authors. All rights reserved.

关键词： Germanium compounds

Search for a structure in the B0sinvariant mass spectrum with the atlas experiment

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arXiv 2018年

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. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Aolder, A.A. Afik, Y. Agheorghiesei, C. Aguilar-Saavedra, J.A. Ahlen, S.P. Ahmadov, F. Aielli, G. Akatsuka, S. Akerstedt, H. Akesson, T.P.A. Akilli, E. Akimov, A.V. Alberghi, G.L. Albert, J. Albicocco, P. Alconada Verzini, M.J. Alderweireldt, S. 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. 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. Bakker, P.J. Bakshi Gupta, D. 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. Department of Physics University of Adelaide Adelaide Australia Physics Department Suny Albany AlbanyNY United States Department of Physics University of Alberta EdmontonAB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics Tobb University of Economics and Technology Ankara Turkey Lapp CNRS/IN2P3 and Université Savoie Mont Blanc Annecy-le-Vieux France High Energy Physics Division Argonne National Laboratory ArgonneIL United States Department of Physics University of Arizona TucsonAZ United States Department of Physics University of Texas at Arlington ArlingtonTX United States Physics Department National and Kapodistrian University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics University of Texas at Austin AustinTX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory and University of California BerkeleyCA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia Infn Sezione di Bologna Dipartimento di Fisica e Astronomia Università di Bologna Bologna It

A search for the narrow structure, X(5568), reported by the D0 Collaboration in the decay sequence X → B0s φ, B0s → J= φ, is presented. The analysis is based on a data sample recorded with the ATLAS detector at the LHC corresponding to 4:9 fb-1of pp collisions at 7 TeV and 19:5 fb-1at 8 TeV. No significant signal was found. Upper limits on the number of signal events, with properties corresponding to those reported by D0, and on the X production rate relative to B0s mesons, pX, were determined at 95% confidence level. The results are N(X) Copyright © 2018, The Authors. All rights reserved.

关键词： Mass spectrometry

Deformation behavior of corroded steel bar based on viscoelastic theory

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Deformation behavior of corroded steel bar based on viscoela...

4th International Conference on Civil Engineering, Architecture and Building Materials, CEABM 2014

作者： Guo, Wei Hong Wang, Tong Ning Tang, Guo Bin Zhengzhou Municipal Administration Management Office Zhengzhou China Henan Transportation Research Institute CO. LTD Zhengzhou China Research and Development Center on Bridge Safety Detection and Reinforcement Technology Ministry of Transport China

ISBN: (纸本)9783038351641

This paper shows the corrosion of steel bar from a new perspective with viscoelasticity theory. The strain of steel bar is decomposed as initial elastic strain and creep strain, and the creep strain is caused by corrosion. In order to analysis creep strain, corrosion factor and corrosion strain function were introduced to reflect the deformation behavior. Then integral constitutive relation of corroded bar was deduced according to the above assumption. As a special case of this approach, the corrosion factor of steel bar in atmospheric environment is introduced. The results indicate that the corrosion factor increase with diameter deducing, and the deformation of the steel bar possess the acceleration creep behavior during the corrosion process. © (2014) Trans Tech Publications, Switzerland.

关键词： Viscoelasticity

Measurements of tt differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at ps = 13 TeV using the ATLAS detector

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arXiv 2018年

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. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Aolder, A.A. Afik, Y. Agheorghiesei, C. Aguilar-Saavedra, J.A. Ahlen, S.P. Ahmadov, F. Aielli, G. Akatsuka, S. Akerstedt, H. Akesson, T.P.A. Akilli, E. Akimov, A.V. Alberghi, G.L. Albert, J. Albicocco, P. Alconada Verzini, M.J. Alderweireldt, S. 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. 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. Bakker, P.J. Bakshi Gupta, D. 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. Department of Physics University of Adelaide Adelaide Australia Physics Department Suny Albany AlbanyNY United States Department of Physics University of Alberta EdmontonAB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics Tobb University of Economics and Technology Ankara Turkey Lapp CNRS/IN2P3 and Université Savoie Mont Blanc Annecy-le-Vieux France High Energy Physics Division Argonne National Laboratory ArgonneIL United States Department of Physics University of Arizona TucsonAZ United States Department of Physics University of Texas at Arlington ArlingtonTX United States Physics Department National and Kapodistrian University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics University of Texas at Austin AustinTX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory and University of California BerkeleyCA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia Infn Sezione di Bologna Dipartimento di Fisica e Astronomia Università di Bologna Bologna It

Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and tt system kinematic observables using proton-proton collisions at a center-of-mass energy of p s = 13 TeV. The data set corresponds to an integrated luminosity of 36:1 fb-1, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum pT > 500 GeV and a second with pT > 350 GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a b-Tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated 2 values. The cross-section for tt production in the fiducial phase-space region is 292-7 (stat)-76(syst) fb, to be compared to the theoretical prediction of 384-36 fb. Copyright © 2018, The Authors. All rights reserved.

关键词： Phase space methods

Search for photonic signatures of gauge-mediated supersymmetry in 13 TeV p p collisions with the ATLAS detector

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arXiv 2018年

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. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A.A. Afik, Y. Agheorghiesei, C. Aguilar-Saavedra, J.A. Ahlen, S.P. Ahmadov, F. Aielli, G. Akatsuka, S. Åkesson, T.P.A. Akilli, E. Akimov, A.V. Alberghi, G.L. Albert, J. Albicocco, P. Alconada Verzini, M.J. Alderweireldt, S. Aleksa, M. Aleksandrov, I.N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, B. Aliev, M. Alimonti, G. Alison, J. Alkire, S.P. Allaire, C. 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. Ambroz, L. Amelung, C. Amidei, D. Amor Dos Santos, S.P. Amoroso, S. 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. Annovi, A. Antel, C. Anthony, M.T. Antonelli, M. Antonov, A. Antrim, D.J. Anulli, F. Aoki, M. Aperio Bella, L. Arabidze, G. Arai, Y. Araque, J.P. Araujo Ferraz, V. Araujo Pereira, R. Arce, A.T.H. Ardell, R.E. Arduh, F.A. Arguin, J.-F. Argyropoulos, S. 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. Atkin, R.J. Atkinson, M. Atlay, N.B. Augsten, K. Avolio, G. Avramidou, R. 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. Bakker, P.J. Bakshi Gupta, D. 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. Department of Physics University of Adelaide Adelaide Australia Physics Department SUNY Albany AlbanyNY United States Department of Physics University of Alberta EdmontonAB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics TOBB University of Economics and Technology Ankara Turkey LAPP CNRS/IN2P3 Université Savoie Mont Blanc Annecy-le-Vieux France High Energy Physics Division Argonne National Laboratory ArgonneIL United States Department of Physics University of Arizona TucsonAZ United States Department of Physics University of Texas at Arlington ArlingtonTX United States Physics Department National and Kapodistrian University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics The University of Texas at Austin AustinTX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory University of California BerkeleyCA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Istanbul Turkey Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia INFN Sezione di Bologna Italy Dipartimento di Fisica e Astronomia Università

A search is presented for photonic signatures, motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of proton–proton collision data at √s = 13 TeV corresponding to an integrated luminosity of 36.1 fb−1 recorded by the ATLAS detector at the LHC, and it explores models dominated by both strong and electroweak production of supersymmetric partner states. Experimental signatures incorporating an isolated photon and significant missing transverse momentum are explored. These signatures include events with an additional photon or additional jet activity not associated with any specific underlying quark flavor. No significant excess of events is observed above the Standard Model prediction, and 95% confidence-level upper limits of between 0.083 fb and 0.32 fb are set on the visible cross section of contributions from physics beyond the Standard Model. These results are interpreted in terms of lower limits on the masses of gluinos, squarks, and gauginos in the context of generalized models of gauge-mediated supersymmetry, which reach as high as 2.3 TeV for strongly produced and 1.3 TeV for weakly produced supersymmetric partner pairs. Copyright © 2018, The Authors. All rights reserved.

关键词： Supersymmetry

Search for the decay of the higgs boson to charm quarks with the ATLAS experiment

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arXiv 2018年

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. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A.A. Afik, Y. Agheorghiesei, C. Aguilar-Saavedra, J.A. Ahlen, S.P. Ahmadov, F. Aielli, G. Akatsuka, S. Åkesson, T.P.A. Akilli, E. Akimov, A.V. Alberghi, G.L. Albert, J. Albicocco, P. Alconada Verzini, M.J. Alderweireldt, S. Aleksa, M. Aleksandrov, I.N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, B. Aliev, M. Alimonti, G. Alison, J. Alkire, S.P. Allaire, C. 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. Ambroz, L. Amelung, C. Amidei, D. Amor Dos Santos, S.P. Amoroso, S. 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. 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. Araujo Pereira, R. Arce, A.T.H. Ardell, R.E. Arduh, F.A. Arguin, J.-F. Argyropoulos, S. 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. Atkin, R.J. Atkinson, M. Atlay, N.B. Augsten, K. Avolio, G. Avramidou, R. 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. Bakker, P.J. Bakshi Gupta, D. 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. Department of Physics University of Adelaide Adelaide Australia Physics Department SUNY Albany AlbanyNY United States Department of Physics University of Alberta EdmontonAB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics TOBB University of Economics and Technology Ankara Turkey LAPP CNRS/IN2P3 Université Savoie Mont Blanc Annecy-le-Vieux France High Energy Physics Division Argonne National Laboratory ArgonneIL United States Department of Physics University of Arizona TucsonAZ United States Department of Physics University of Texas at Arlington ArlingtonTX United States Physics Department National and Kapodistrian University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics The University of Texas at Austin AustinTX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory University of California BerkeleyCA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Istanbul Turkey Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia INFN Sezione di Bologna Dipartimento di Fisica e Astronomia Università di Bolo

A direct search for the Standard Model Higgs boson decaying to a pair of charm quarks is presented. Associated production of the Higgs and Z bosons, in the decay mode ZH → `+`−cc¯ is studied. A dataset with an integrated luminosity of 36.1 fb−1 of pp collisions at √s = 13 TeV recorded by the ATLAS experiment at the LHC is used. The H → cc¯ signature is identified using charm-tagging algorithms. The observed (expected) upper limit on σ(pp → ZH) × B(H → cc¯) is 2.7 (3.9+−21..11) pb at the 95% confidence level for a Higgs boson mass of 125 GeV, while the Standard Model value is 26 fb. Copyright © 2018, The Authors. All rights reserved.

关键词： Bosons