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arXiv 2023年

作者： Adhikari, s. Afzal, F. Akondi, C.s. Albrecht, M. Amaryan, M. Arroyave, V. Asaturyan, A. Austregesilo, A. Baldwin, Z. Barbosa, F. Barlow, J. Barriga, E. Barsotti, R. Beattie, t.D. Berdnikov, V.V. Black, t. Boeglin, W. Briscoe, W.J. Britton, t. Brooks, W.K. Byer, D. Chudakov, E. Cole, P.L. Cortes, O. Crede, V. Dalton, M.M. Darulis, D. Deur, A. Dobbs, s. Dolgolenko, A. Dotel, R. Dugger, M. Dzhygadlo, R. Ebersole, D. Egiyan, H. Erbora, t. Eugenio, P. Fabrizi, A. Fanelli, C. Fang, s. Fegan, s. Fitches, J. Foda, A.M. Furletov, s. Gan, L. Gao, H. Gardner, A. Gasparian, A. Gleason, C. Goetzen, K. Goryachev, V.s. Grube, B. Guo, J. Guo, L. Hague, t.J. Hakobyan, H. Hernandez, J. Hoffman, N.D. Hornidge, D. Hou, G. Huber, G.M. Hurck, P. Hurley, A. imoehl, W. ireland, D.G. ito, M.M. Jaegle, i. Jarvis, N.s. Jeske, t. Jones, R.t. Kakoyan, V. Kalicy, G. Khachatryan, V. Khatchatryan, M. Kourkoumelis, C. LaDuke, A. Larin, i. Lawrence, D. Lersch, D.i. Li, H. Li, W.B. Liu, B. Livingston, K. Lolos, G.J. Lorenti, L. Lyubovitskij, V. Mack, D. Mahmood, A. Martel, P.P. Marukyan, H. Matveev, V. McCaughan, M. McCracken, M. Meyer, C.A. Miskimen, R. Mitchell, R.E. Mizutani, K. Neelamana, V. Ng, L. Nissen, E. Orešić, s. Ostrovidov, A.i. Papandreou, Z. Paudel, C. Pedroni, R. Pentchev, L. Peters, K.J. Prather, E. Rakshit, s. Reinhold, J. Remington, A. Ritchie, B.G. Ritman, J. Rodriguez, G. Romanov, D. saldana, K. salgado, C. schadmand, s. schertz, A.M. scheuer, K. schick, A. schmidt, A. schumacher, R.A. schwiening, J. sharp, P. shen, X. shepherd, M.R. smith, A. smith, E.s. sober, D.i. somov, s. somov, A. stevens, J.R. strakovsky, i.i. sumner, B. suresh, K. tarasov, V.V. taylor, s. teymurazyan, A. thiel, A. Viducic, t. Whitlatch, t. Wickramaarachchi, N. Williams, M. Wunderlich, Y. Yu, B. Zarling, J. Zhang, Z. Zhao, Z. Zhou, X. Zhou, J. Zihlmann, B. Arizona State University TempeAZ85287 United States National and Kapodistrian University of Athens Athens15771 Greece Helmholtz-Institut für Strahlen- und Kernphysik Universität Bonn BonnD-53115 Germany Carnegie Mellon University PittsburghPA15213 United States The Catholic University of America WashingtonDC20064 United States University of Connecticut StorrsCT06269 United States Duke University DurhamNC27708 United States Florida International University MiamiFL33199 United States Florida State University TallahasseeFL32306 United States The George Washington University WashingtonDC20052 United States University of Glasgow GlasgowG12 8QQ United Kingdom GSI Helmholtzzentrum für Schwerionenforschung GmbH DarmstadtD-64291 Germany Institute of High Energy Physics Beijing100049 China Indiana University BloomingtonIN47405 United States IKP Forschungszentrum Jülich Jülich GmbH D-52428 Germany National Research Centre Kurchatov Institute Moscow123182 Russia Lamar University BeaumontTX77710 United States Johannes Gutenberg-Universität Mainz Mainz55128 Germany University of Massachusetts AmherstMA01003 United States Massachusetts Institute of Technology CambridgeMA02139 United States National Research Nuclear University Moscow Engineering Physics Institute Moscow115409 Russia Mount Allison University SackvilleNBE4L 1E6 Canada Norfolk State University NorfolkVA23504 United States North Carolina A&T State University GreensboroNC27411 United States University of North Carolina at Wilmington WilmingtonNC28403 United States Old Dominion University NorfolkVA23529 United States University of Regina ReginaSKS4S 0A2 Canada Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Thomas Jefferson National Accelerator Facility Newport NewsVA23606 United States Tomsk Polytechnic University Tomsk634050 Russia Tomsk State University Tomsk634050 Russia Union College SchenectadyNY12308 United States Washin

We report the total and differential cross sections for J/ψ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2 GeV up to 11.44 GeV and over the full kinematic range of momentum transfer squared, t. such coverage facilitates the extrapolation of the differential cross sections to the forward (t = 0) point beyond the physical region. the forward cross section is used by many theoretical models and plays an important role in understanding J/ψ photoproduction and its relation to the J/ψ−proton interaction. these measurements of J/ψ photoproduction near threshold are also crucial inputs to theoretical models that are used to study important aspects of the gluon structure of the proton, such as the gluon Generalized Parton Distribution (GPD) of the proton, the mass radius of the proton, and the trace anomaly contribution to the proton mass. We observe possible structures in the total cross section energy dependence and find evidence for contributions beyond gluon exchange in the differential cross section close to threshold, both of which are consistent with contributions from open-charm intermediate states. Copyright © 2023, the Authors. All rights reserved.

关键词： Momentum transfer

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Measurement of the CKM angle γ in B± → D K∗(892)± decays

arXiv

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arXiv 2024年

作者： Aaij, R. Abellán Beteta, C. Ackernley, t. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C.A. Aiola, s. Ajaltouni, Z. Akar, s. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alkhazov, G. Alvarez Cartelle, P. Amato, s. Amhis, Y. An, L. Anderlini, L. Andreianov, A. Andreotti, M. Archilli, F. Artamonov, A. Artuso, M. Arzymatov, K. Aslanides, E. Atzeni, M. Audurier, B. Bachmann, s. Bachmayer, M. Back, J.J. Baker, s. Baladron Rodriguez, P. Balagura, V. Baldini, W. Baptista Leite, J. Barlow, R.J. Barsuk, s. Barter, W. Bartolini, M. Baryshnikov, F. Basels, J.M. Bassi, G. Batsukh, B. Battig, A. Bay, A. Becker, M. Bedeschi, F. Bediaga, i. Beiter, A. Belavin, V. Belin, s. Bellee, V. Belous, K. Belov, i. Belyaev, i. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertolin, A. Betancourt, C. Betti, F. Bezshyiko, ia. Bhasin, s. Bhom, J. Bian, L. Bieker, M.s. Bifani, s. Billoir, P. Birch, M. Bishop, F.C.R. Bitadze, A. Bizzeti, A. Bjørn, M. Blago, M.P. Blake, t. Blanc, F. Blusk, s. Bobulska, D. Boelhauve, J.A. Boente Garcia, O. Boettcher, t. Boldyrev, A. Bondar, A. Bondar, N. Borghi, s. Borisyak, M. Borsato, M. Borsuk, J.t. Bouchiba, s.A. Bowcock, t.J.V. Boyer, A. Bozzi, C. Bradley, M.J. Braun, s. Brea Rodriguez, A. Brodski, M. Brodzicka, J. Brossa Gonzalo, A. Brundu, D. Buonaura, A. Burr, C. Bursche, A. Butkevich, A. Butter, J.s. Buytaert, J. Byczynski, W. Cadeddu, s. Cai, H. Calabrese, R. Calefice, L. Calero Diaz, L. Cali, s. Calladine, R. Calvi, M. Calvo Gomez, M. Camargo Magalhaes, P. Camboni, A. Campana, P. Campoverde Quezada, A.F. Capelli, s. Capriotti, L. Carbone, A. Carboni, G. Cardinale, R. Cardini, A. Carli, i. Carniti, P. Carus, L. Carvalho Akiba, K. Casais Vidal, A. Casse, G. Cattaneo, M. Cavallero, G. Celani, s. Cerasoli, J. Chadwick, A.J. Chapman, M.G. Charles, M. Charpentier, Ph. Chatzikonstantinidis, G. Chavez Barajas, C.A. Chefdeville, M. Chen, C. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China Univ. Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy Universita degli Studi di Padova Universita e INFN Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Henryk Niewodniczanski Institute of Nuclear Physics Polish

Measurements of CP observables and the CKM angle γ are performed in B± → DK∗(892)± decays, where D represents a superposition of D0 and D0 states, using the LHCb dataset collected during Run 1 (2011–2012) and Run 2 (2015–2018). A comprehensive study of this channel is presented with the D meson reconstructed in two-body final states K±π, K+K- and π+π-;four-body final states K±ππ±π and π+π-π+π-;and three-body final states Ks0π+π- and Ks0K+K-. this analysis includes the first observation of the suppressed B± → [π+K-]DK∗± and B± → [π+K-π+π-]DK∗± decays. the combined result gives γ = (63 ± 13)◦ © 2024, CC BY.

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Observation of exotic J/ψ resonances in diffractive processes in proton-proton collisions

arXiv

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arXiv 2024年

the first study of J/ψ production in diffractive processes in proton-proton collisions is presented. the study is based on an LHCb dataset recorded at centreof-mass energy of 13 teV, corresponding to an integrated luminosity of 5 fb-1. the data disfavour a nonresonant J/ψ production but are consistent with a resonant model including several resonant states observed previously only in B+ → J/ψK+ decays. the χc0(4500) state is observed with a significance over 5 σ and the χc1(4274) is confirmed with a significance of more than 4 σ. © 2024, CC BY.

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search for Higgs boson decays into a pair of pseudoscalar particles in the γγτhadτhad final state using pp collisions at = 13 teV with the AtLAs detector

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Journal of High Energy Physics 2025年第3期2025卷 1-39页

作者： Aad, G. Aakvaag, E. Abbott, B. Abdelhameed, s. Abeling, K. Abicht, N. J. Abidi, s. H. Aboelela, M. Aboulhorma, A. Abramowicz, H. Abulaiti, Y. Acharya, B. s. Ackermann, A. Adam Bourdarios, C. Adamczyk, L. Addepalli, s. V. Addison, M. J. Adelman, J. Adiguzel, A. Adye, t. Affolder, A. A. Afik, Y. Agaras, M. N. Aggarwal, A. Agheorghiesei, C. Ahmadov, F. Ahuja, s. Ai, X. Aielli, G. Aikot, A. Ait tamlihat, M. Aitbenchikh, B. Akbiyik, M. Åkesson, t. P. A. Akimov, A. V. Akiyama, D. Akolkar, N. N. Aktas, s. Alberghi, G. L. Albert, J. Albicocco, P. Albouy, G. L. Alderweireldt, s. Alegria, Z. L. Aleksa, M. Aleksandrov, i. N. Alexa, C. Alexopoulos, t. Alfonsi, F. Algren, M. Alhroob, M. Ali, B. Ali, H. M. J. Ali, s. Alibocus, s. W. Aliev, M. Alimonti, G. Alkakhi, W. Allaire, C. Allbrooke, B. M. M. Allen, J. s. Allen, J. F. Allport, P. P. Aloisio, A. Alonso, F. Alpigiani, C. Alsolami, Z. M. K. Alvarez Fernandez, A. Alves Cardoso, M. Alviggi, M. G. Aly, M. Amaral Coutinho, Y. Ambler, A. Amelung, C. Amerl, M. Ames, C. G. Amidei, D. Amini, B. Amirie, K. Amirkhanov, A. Amor Dos santos, s. P. Amos, K. R. Amperiadou, D. An, s. Ananiev, V. Anastopoulos, C. Andeen, t. Anders, J. K. Anderson, A. C. Andreazza, A. Angelidakis, s. Angerami, A. Anisenkov, A. V. Annovi, A. Antel, C. Antipov, E. Antonelli, M. Anulli, F. Aoki, M. Aoki, t. Aparo, M. A. Aperio Bella, L. Appelt, C. Apyan, A. Arbiol Val, s. J. Arcangeletti, C. Arce, A. t. H. Arguin, J-F. Argyropoulos, s. Arling, J.-H. Arnaez, O. Arnold, H. Artoni, G. Asada, H. Asai, K. Asai, s. Asbah, N. A. Ashby Pickering, R. A. Aslam, A. M. Assamagan, K. Astalos, R. Astrand, K. s. V. Atashi, s. Atkin, R. J. Atmani, H. Atmasiddha, P. A. Augsten, K. Auriol, A. D. Austrup, V. A. Avolio, G. Axi.t.s, K. Azuelos, G. Babal, D. Bachacou, H. Bachas, K. Bachiu, A. Bachmann, E. Backes, M. J. Badea, A. Baer, t. M. Bagnaia, P. Bahmani, M. Bahner, D. Bai, K. Baines, J. t. Baines, L. Baker, O. K. Bakos, E. Bakshi Gupta, D. Balabram Filho, L. E. Balakrishnan, V. Balasubramanian, R. Baldin, E. M. Balek, P. Ball CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Department for Physics and Technology University of Bergen Bergen Norway Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman United States of America New York University Abu Dhabi Abu Dhabi United Arab Emirates II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton United States of America Physics Department Southern Methodist University Dallas United States of America Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics New York University New York United States of America INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Department of Physics King’s College London London United Kingdom Kirchhoff-Institut für Physik Ruprecht-Karls-Universität Heidelberg Heidelberg Germany LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Krakow Poland SLAC National Accelerator Laboratory Stanford United States of America School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb United States of America Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz United States of America Enrico Fermi Institute University of Chicago Chicago United States of America Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain Institut für Physik Universität Mainz Mainz Germany Department of Physics

A search for exotic decays of the 125 GeV Higgs boson into a pair of new spin-0 particles, H → aa, where one decays into a photon pair and the other into a τ-lepton pair, is presented. Hadronic decays of the τ-leptons are considered and reconstructed using a dedicated tagger for collimated τ-lepton pairs. the search uses 140 fb−1 of proton-proton collision data at a centre-of-mass energy of $$ \sqrt{s} $$ = 13 teV recorded between 2015 and 2018 by the AtLAS experiment at the Large Hadron Collider. the search is performed in the mass range of the a boson between 10 GeV and 60 GeV. No significant excess of events is observed above the Standard Model background expectation. Model-independent upper limits at 95% confidence level are set on the branching ratio of the Higgs boson to the γγττ final state, $$ \mathcal{B} $$ (H → aa → γγττ), ranging from 0.2% to 2%, depending on the a-boson mass hypothesis.

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search for a heavy charged Higgs boson decaying into a W boson and a Higgs boson in final states with leptons and b-jets in = 13 teV pp collisions with the AtLAs detector

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Journal of High Energy Physics 2025年第2期2025卷 1-69页

作者： Aad, G. Aakvaag, E. Abbott, B. Abdelhameed, s. Abeling, K. Abicht, N. J. Abidi, s. H. Aboelela, M. Aboulhorma, A. Abramowicz, H. Abulaiti, Y. Acharya, B. s. Ackermann, A. Adam Bourdarios, C. Adamczyk, L. Addepalli, s. V. Addison, M. J. Adelman, J. Adiguzel, A. Adye, t. Affolder, A. A. Afik, Y. Agaras, M. N. Aggarwal, A. Agheorghiesei, C. Ahmadov, F. Ahuja, s. Ai, X. Aielli, G. Aikot, A. Ait tamlihat, M. Aitbenchikh, B. Akbiyik, M. Åkesson, t. P. A. Akimov, A. V. Akiyama, D. Akolkar, N. N. Aktas, s. Alberghi, G. L. Albert, J. Albicocco, P. Albouy, G. L. Alderweireldt, s. Alegria, Z. L. Aleksa, M. Aleksandrov, i. N. Alexa, C. Alexopoulos, t. Alfonsi, F. Algren, M. Alhroob, M. Ali, B. Ali, H. M. J. Ali, s. Alibocus, s. W. Aliev, M. Alimonti, G. Alkakhi, W. Allaire, C. Allbrooke, B. M. M. Allen, J. s. Allen, J. F. Allport, P. P. Aloisio, A. Alonso, F. Alpigiani, C. Alsolami, Z. M. K. Alvarez Fernandez, A. Alves Cardoso, M. Alviggi, M. G. Aly, M. Amaral Coutinho, Y. Ambler, A. Amelung, C. Amerl, M. Ames, C. G. Amidei, D. Amini, B. Amirie, K. J. Amirkhanov, A. Amor Dos santos, s. P. Amos, K. R. Amperiadou, D. An, s. Ananiev, V. Anastopoulos, C. Andeen, t. Anders, J. K. Anderson, A. C. Andreazza, A. Angelidakis, s. Angerami, A. Anisenkov, A. V. Annovi, A. Antel, C. Antipov, E. Antonelli, M. Anulli, F. Aoki, M. Aoki, t. Aparo, M. A. Aperio Bella, L. Appelt, C. Apyan, A. Arbiol Val, s. J. Arcangeletti, C. Arce, A. t. H. Arguin, J-F. Argyropoulos, s. Arling, J.-H. Arnaez, O. Arnold, H. Artoni, G. Asada, H. Asai, K. Asai, s. Asbah, N. A. Ashby Pickering, R. A. Aslam, A. M. Assamagan, K. Astalos, R. Astrand, K. s. V. Atashi, s. Atkin, R. J. Atmani, H. Atmasiddha, P. A. Augsten, K. Auriol, A. D. Austrup, V. A. Avolio, G. Axi.t.s, K. Azuelos, G. Babal, D. Bachacou, H. Bachas, K. Bachiu, A. Bachmann, E. Backes, M. J. Badea, A. Baer, t. M. Bagnaia, P. Bahmani, M. Bahner, D. Bai, K. Baines, J. t. Baines, L. Baker, O. K. Bakos, E. Bakshi Gupta, D. Balabram Filho, L. E. Balakrishnan, V. Balasubramanian, R. Baldin, E. M. Balek, P. B CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Department for Physics and Technology University of Bergen Bergen Norway Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman United States of America New York University Abu Dhabi Abu Dhabi United Arab Emirates II. Physikalisches Institut Georg-August-Universität Göttingen Göttingen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Physics Department Brookhaven National Laboratory Upton United States of America Physics Department Southern Methodist University Dallas United States of America Faculté des sciences Université Mohammed V Rabat Morocco Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics New York University New York United States of America INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy Department of Physics King’s College London London United Kingdom Kirchhoff-Institut für Physik Ruprecht-Karls-Universität Heidelberg Heidelberg Germany LAPP Université Savoie Mont Blanc CNRS/IN2P3 Annecy France AGH University of Krakow Faculty of Physics and Applied Computer Science Krakow Poland SLAC National Accelerator Laboratory Stanford United States of America School of Physics and Astronomy University of Manchester Manchester United Kingdom Department of Physics Northern Illinois University DeKalb United States of America Department of Physics Istanbul University Istanbul Türkiye Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz United States of America Enrico Fermi Institute University of Chicago Chicago United States of America Institut de Física d’Altes Energies (IFAE) Barcelona Institute of Science and Technology Barcelona Spain Institut für Physik Universität Mainz Mainz Germany Department of Physics Alexand

this article presents a search for a heavy charged Higgs boson produced in association with a top quark and a bottom quark, and decaying into a W boson and a 125 GeV Higgs boson h. the search is performed in final states with one charged lepton, missing transverse momentum, and jets using proton-proton collision data at $$ \sqrt{s} $$ = 13 teV recorded with the AtLAS detector during Run 2 of the LHC at CERN. this data set corresponds to a total integrated luminosity of 140 fb−1. the search is conducted by examining the reconstructed invariant mass distribution of the Wh candidates for evidence of a localised excess in the charged Higgs boson mass range from 250 GeV to 3 teV. No significant excess of data over the expected background is observed and 95% confidence-level upper limits between 2.8 pb and 1.2 fb are placed on the production cross-section times branching ratio for charged Higgs bosons decaying into Wh.

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search for Gravitational Waves Associated with Fast Radio Bursts Detected by CHiME/FRB during the LiGO-Virgo Observing Run O3a

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Astrophysical Journal 2023年第2期955卷 155-155页

作者： Abbott, R. Abbott, t.D. Acernese, F. Ackley, K. Adams, C. Adhikari, N. Adhikari, R.X. Adya, V.B. Affeldt, C. Agarwal, D. Agathos, M. Agatsuma, K. Aggarwal, N. Aguiar, O.D. Aiello, L. Ain, A. Ajith, P. Akutsu, t. Albanesi, s. Allocca, A. Altin, P.A. Amato, A. Anand, C. Anand, s. Ananyeva, A. Anderson, s.B. Anderson, W.G. Ando, M. Andrade, t. Andres, N. Andrić, t. Angelova, s.V. Ansoldi, s. Antelis, J.M. Antier, s. Appert, s. Arai, Koya Arai, Y. Araki, s. Araya, A. Araya, M.C. Areeda, J.s. Arène, M. Aritomi, N. Arnaud, N. Aronson, s.M. Arun, K.G. Asada, H. Asali, Y. Ashton, G. Aso, Y. Assiduo, M. Aston, s.M. Astone, P. Aubin, F. Austin, C. Babak, s. Badaracco, F. Bader, M.K.M. Badger, C. Bae, s. Bae, Y. Baer, A.M. Bagnasco, s. Bai, Y. Baiotti, L. Baird, J. Bajpai, R. Ball, M. Ballardin, G. Ballmer, s.W. Balsamo, A. Baltus, G. Banagiri, s. Bankar, D. Barayoga, J.C. Barbieri, C. Barish, B.C. Barker, D. Barneo, P. Barone, F. Barr, B. Barsotti, L. Barsuglia, M. Barta, D. Bartlett, J. Barton, M.A. Bartos, i. Bassiri, R. Basti, A. Bawaj, M. Bayley, J.C. Baylor, A.C. Bazzan, M. Bécsy, B. Bedakihale, V.M. Bejger, M. Belahcene, i. Benedetto, V. Beniwal, D. Bennett, t.F. Bentley, J.D. BenYaala, M. Bergamin, F. Berger, B.K. Bernuzzi, s. Berry, C.P.L. Bersanetti, D. Bertolini, A. Betzwieser, J. Beveridge, D. Bhandare, R. Bhardwaj, U. Bhattacharjee, D. Bhaumik, s. Bilenko, i.A. Billingsley, G. Bini, s. Birney, R. Birnholtz, O. Biscans, s. Bischi, M. Biscoveanu, s. Bisht, A. Biswas, B. Bitossi, M. Bizouard, M.-A. Blackburn, J.K. Blair, C.D. Blair, D.G. Blair, R.M. Bobba, F. Bode, N. Boer, M. Bogaert, G. Boldrini, M. Bonavena, L.D. Bondu, F. Bonilla, E. Bonnand, R. Booker, P. Boom, B.A. Bork, R. Boschi, V. Bose, N. Bose, s. Bossilkov, V. Boudart, V. Bouffanais, Y. Boumerdassi, A. Bozzi, A. Bradaschia, C. Brady, P.R. Bramley, A. Branch, A. Branchesi, M. Brau, J.E. Breschi, M. Briant, t. Briggs, J.H. Brillet, A. Brinkmann, M. Brockill, P. Brooks, A.F. Brooks, J. Brown, D.D. Brunett, s. Bruno, G. Bruntz, R. Bryant, J. Buchanan, J. B LIGO Laboratory California Institute of Technology Pasadena 91125 CA United States Louisiana State University Baton Rouge 70803 LA United States Dipartimento di Farmacia Università di Salerno Fisciano Salerno I-84084 Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Napoli I-80126 Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 VIC Australia LIGO Livingston Observatory Livingston 70754 LA United States University of Wisconsin-Milwaukee Milwaukee 53201 WI United States OzGrav Australian National University Canberra 0200 ACT Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Hannover D-30167 Germany Leibniz Universität Hannover Hannover D-30167 Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena Jena D-07743 Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston 60208 IL United States Instituto Nacional de Pesquisas Espaciais São Paulo São José dos Campos 12227-010 Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa Pisa I-56127 Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan INFN Sezione di Torino Torino I-10125 Italy Università di Napoli “Federico II Complesso Universitario di Monte S. Angelo Napoli I-80126 Italy Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière Villeurbanne F-69622

We search for gravitational-wave (GW) transients associated with fast radio bursts (FRBs) detected by the Canadian Hydrogen intensity Mapping Experiment Fast Radio Burst Project, during the first part of the third observing run of Advanced LiGO and Advanced Virgo (2019 April 1 15:00 UtC-2019 October 1 15:00 UtC). triggers from 22 FRBs were analyzed with a search that targets both binary neutron star (BNs) and neutron star-black hole (NsBH) mergers. A targeted search for generic GW transients was conducted on 40 FRBs. We find no significant evidence for a GW association in either search. Given the large uncertainties in the distances of our FRB sample, we are unable to exclude the possibility of a GW association. Assessing the volumetric event rates of both FRB and binary mergers, an association is limited to 15% of the FRB population for BNs mergers or 1% for NsBH mergers. We report 90% confidence lower bounds on the distance to each FRB for a range of GW progenitor models and set upper limits on the energy emitted through GWs for a range of emission scenarios. We find values of order 10<sup>51sup>-10<sup>57sup> erg for models with central GW frequencies in the range 70-3560 Hz. At the sensitivity of this search, we find these limits to be above the predicted GW emissions for the models considered. We also find no significant coincident detection of GWs with the repeater, FRB 20200120E, which is the closest known extragalactic FRB. © 2023. the Author(s). Published by the American Astronomical society.

关键词： Gravitational wave astronomy Radio transient sources

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All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LiGO and Advanced Virgo O3 data

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Physical Review D 2022年第10期106卷 102008-102008页

作者： R. Abbott H. Abe F. Acernese K. Ackley N. Adhikari R. X. Adhikari V. K. Adkins V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith t. Akutsu s. Albanesi R. A. Alfaidi A. Allocca P. A. Altin A. Amato C. Anand s. Anand A. Ananyeva s. B. Anderson W. G. Anderson M. Ando t. Andrade N. Andres M. Andrés-Carcasona t. Andrić s. V. Angelova s. Ansoldi J. M. Antelis s. Antier t. Apostolatos E. Z. Appavuravther s. Appert s. K. Apple K. Arai A. Araya M. C. Araya J. s. Areeda M. Arène N. Aritomi N. Arnaud M. Arogeti s. M. Aronson H. Asada Y. Asali G. Ashton Y. Aso M. Assiduo s. Assis de souza Melo s. M. Aston P. Astone F. Aubin K. AultONeal C. Austin s. Babak F. Badaracco M. K. M. Bader C. Badger s. Bae Y. Bae A. M. Baer s. Bagnasco Y. Bai J. Baird R. Bajpai t. Baka M. Ball G. Ballardin s. W. Ballmer A. Balsamo G. Baltus s. Banagiri B. Banerjee D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton i. Bartos s. Basak R. Bassiri A. Basti M. Bawaj J. C. Bayley M. Bazzan B. R. Becher B. Bécsy V. M. Bedakihale F. Beirnaert M. Bejger i. Belahcene V. Benedetto D. Beniwal M. G. Benjamin t. F. Bennett J. D. Bentley M. BenYaala s. Bera M. Berbel F. Bergamin B. K. Berger s. Bernuzzi D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare A. V. Bhandari U. Bhardwaj R. Bhatt D. Bhattacharjee s. Bhaumik A. Bianchi i. A. Bilenko G. Billingsley s. Bini R. Birney O. Birnholtz s. Biscans M. Bischi s. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boër G. Bogaert M. Boldrini G. N. Bolingbroke L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose s. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. E. Brau M. Breschi t. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Graduate School of Science Tokyo Institute of Technology Meguro-ku Tokyo 152-8551 Japan Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics and Astronomy Monash University Clayton 3800 Victoria Australia University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA Louisiana State University Baton Rouge Louisiana 70803 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Dipartimento di Fisica Università degli Studi di Torino I-10125 Torino Italy INFN Sezione di Torino I-10125 Torino Italy SUPA University of Glasgow Glasgow G12 8QQ United Kingdom Università di Napoli “Federico II ” Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Université de Lyon Université Claude Bernard Lyon 1

We present results of an all-sky search for continuous gravitational waves which can be produced by spinning neutron stars with an asymmetry around their rotation axis, using data from the third observing run of the Advanced LiGO and Advanced Virgo detectors. Four different analysis methods are used to search in a gravitational-wave frequency band from 10 to 2048 Hz and a first frequency derivative from −10−8 to 10−9 Hz/s. No statistically significant periodic gravitational-wave signal is observed by any of the four searches. As a result, upper limits on the gravitational-wave strain amplitude h0 are calculated. the best upper limits are obtained in the frequency range of 100 to 200 Hz and they are ∼1.1×10−25 at 95% confidence level. the minimum upper limit of 1.10×10−25 is achieved at a frequency 111.5 Hz. We also place constraints on the rates and abundances of nearby planetary- and asteroid-mass primordial black holes that could give rise to continuous gravitational-wave signals.

关键词： Gravitational wave sources Neutron stars & pulsars Gravitational wave detection

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Adaptive sleep scheduling for Cluster Based Wireless sensor Networks for Precision Agriculture

Adaptive Sleep Scheduling for Cluster Based Wireless Sensor ...

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international Conference on Advances in Communication and Computing technology (iCACCt)

作者： s. s.ponde s. s. Lomte Computer Science and Engineering Dept D. I. E. M. S. Aurangabad Maharashtra India M. S. Bidve College of Engineering Latur Maharashtra India

ISBN: (纸本)9781538609279

Wireless sensor networks are collection of spatially distributed autonomous sensors called as nodes, which are responsible for monitoring physical or environmental conditions such as temperature, pressure, humidity, etc. and cooperatively passes their data through the network to a main locations. But one major constraint of this network is energy consumption as the sensor nodes are equipped with limited battery power. to minimize energy consumption many algorithms have been applied. the objective of the proposed algorithm Adaptive sleep scheduling algorithm is to schedule the nodes into sleep and active state by comparing its energy with threshold. Entire network is divided into cluster with cluster head is the node with highest energy. the Cluster head is responsible for that state of the node either active or sleep. the proposed algorithm is evaluated and simulated with Ns2 and the results are analyzed to show better performance of the algorithm.

关键词： Clustering algorithms Wireless sensor networks temperature sensors Energy consumption computers Monitoring

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A Comparative study of the Ground state transitions of CO and [C i] as Molecular Gas tracers at High Redshift

arXiv

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arXiv 2024年

作者： Castillo, Marta Frias Rybak, Matus Hodge, Jacqueline A. van der Werf, Paul smail, ian Butterworth, Joshua Jansen, Jasper topkaras, theodoros Chen, Chian-Chou Chapman, scott C. Weiss, Axel Algera, Hiddo Birkin, Jack E. da Cunha, Elisabete Chen, Jianhang Dannerbauer, Helmut Jiménez-Andrade, E.F. ikarashi, soh Liao, Cheng-Lin Murphy, Eric J. swinbank, A.M. Walter, Fabian Rivera, Gabriela Calistro ivison, R.J. Del Lagos, Claudia P. Leiden Observatory Leiden University P.O. Box 9513 Leiden2300 RA Netherlands Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technology Mekelweg 4 Delft2628 CD Netherlands SRON - Netherlands Institute for Space Research Niels Bohrweg 4 Leiden2333 CA Netherlands Centre for Extragalactic Astronomy Department of Physics Durham University South Road DurhamDH1 3LE United Kingdom I. Physikalisches Institut Universität zu Köln Zülpicher Str. 77 Köln50937 Germany No.1 Section 4 Roosevelt Road Taipei10617 Taiwan Department of Physics and Atmospheric Science Dalhousie University Halifax HalifaxNSB3H 3J5 Canada Max Planck Institut für Radioastronomie Auf dem Hügel 69 BonnD-53121 Germany Hiroshima Astrophysical Science Center Hiroshima University 1-3-1 Kagamiyama Hiroshima Higashi-Hiroshima739-8526 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo Japan Department of Physics and Astronomy Texas A&M University 4242 TAMU College StationTX77843-4242 United States George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University 4242 TAMU College StationTX77843-4242 United States International Centre for Radio Astronomy Research University of Western Australia 35 Stirling Hwy CrawleyWA6009 Australia Australia Karl-Schwarzschild-Straße 2 Garching bei München85748 Germany Tenerife La LagunaE-38205 Spain Dpto. Astrofísica Universidad de la Laguna Tenerife La LagunaE-38206 Spain Instituto de Radioastronomía y Astrofísica Universidad Nacional Autónoma de México Antigua Carretera a Pátzcuaro # 8701 Ex-Hda. San José de la Huerta Michoacán MoreliaC.P. 58089 Mexico Department of Physics General Studies College of Engineering Nihon University 1 Nakagawara Tokusada Tamuramachi Fukushima Koriyama963-8642 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Graduate Institute of Astrophysics Na

the CO(1-0) and [C i](1-0) emission lines are well-established tracers of cold molecular gas mass in local galaxies. At high redshift, where the interstellar medium (isM) is likely to be denser, there have been limited direct comparisons of both ground state transitions. Here we present a study of CO(1-0) and [C i](1-0) emission in a sample of 20 unlensed dusty, star-forming galaxies at z = 2 − 5. the CO(1-0)/[C i](1-0) ratio is constant up to at least z = 5, supporting the use of [Ci](1-0) as a gas mass tracer. PDR modelling of the available data indicates a median H2 density of log(n [cm−3]) = 4.7 ± 0.2, and UV radiation field log(GUV [G0]) = 3.2 ± 0.2. We use the CO(1-0), [C i](1-0) and 3mm dust continuum measurements to cross-calibrate the respective gas mass conversion factors, finding no dependence of these factors on either redshift or infrared luminosity. Assuming a variable CO conversion factor then implies [C i] and dust conversion factors that differ from canonically assumed values but are consistent with the solar/super-solar metallicities expected for our sources. Radiative transfer modelling shows that the warmer CMB at high redshift can significantly affect the [C i] as well as CO emission, which can change the derived molecular gas masses by up to 70% for the coldest kinetic gas temperatures expected. Nevertheless, we show that the magnitude of the effect on the ratio of the tracers is within the known scatter of the L′CO − L′[Ci] relation. Further determining the absolute decrease of individual line intensities will require well-sampled spectral line energy distributions (sLEDs) to model the gas excitation conditions in more detail. Copyright © 2024, the Authors. All rights reserved.

关键词： Ground state

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search for continuous gravitational wave emission from the Milky Way center in O3 LiGO-Virgo data

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Physical Review D 2022年第4期106卷 042003-042003页

作者： R. Abbott H. Abe F. Acernese K. Ackley N. Adhikari R. X. Adhikari V. K. Adkins V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith t. Akutsu s. Albanesi R. A. Alfaidi A. Allocca P. A. Altin A. Amato C. Anand s. Anand A. Ananyeva s. B. Anderson W. G. Anderson M. Ando t. Andrade N. Andres M. Andrés-Carcasona t. Andrić s. V. Angelova s. Ansoldi J. M. Antelis s. Antier t. Apostolatos E. Z. Appavuravther s. Appert s. K. Apple K. Arai A. Araya M. C. Araya J. s. Areeda M. Arène N. Aritomi N. Arnaud M. Arogeti s. M. Aronson K. G. Arun H. Asada Y. Asali G. Ashton Y. Aso M. Assiduo s. Assis de souza Melo s. M. Aston P. Astone F. Aubin K. AultONeal C. Austin s. Babak F. Badaracco M. K. M. Bader C. Badger s. Bae Y. Bae A. M. Baer s. Bagnasco Y. Bai J. Baird R. Bajpai t. Baka M. Ball G. Ballardin s. W. Ballmer A. Balsamo G. Baltus s. Banagiri B. Banerjee D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton i. Bartos s. Basak R. Bassiri A. Basti M. Bawaj J. C. Bayley M. Bazzan B. R. Becher B. Bécsy V. M. Bedakihale F. Beirnaert M. Bejger i. Belahcene V. Benedetto D. Beniwal M. G. Benjamin t. F. Bennett J. D. Bentley M. BenYaala s. Bera M. Berbel F. Bergamin B. K. Berger s. Bernuzzi D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare A. V. Bhandari U. Bhardwaj R. Bhatt D. Bhattacharjee s. Bhaumik A. Bianchi i. A. Bilenko G. Billingsley s. Bini R. Birney O. Birnholtz s. Biscans M. Bischi s. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boër G. Bogaert M. Boldrini G. N. Bolingbroke L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose s. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. E. Brau M. Breschi t. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Graduate School of Science Tokyo Institute of Technology Meguro-ku Tokyo 152-8551 Japan Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics and Astronomy Monash University Clayton 3800 Victoria Australia University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA Louisiana State University Baton Rouge Louisiana 70803 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 Sáo José dos Campos São Paulo Brazil Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Dipartimento di Fisica Università degli Studi di Torino I-10125 Torino Italy INFN Sezione di Torino I-10125 Torino Italy SUPA University of Glasgow Glasgow G12 8QQ United Kingdom Università di Napoli “Federico II” Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Université de Lyon Université Claude Bernard Lyon 1

We present a directed search for continuous gravitational wave (CW) signals emitted by spinning neutron stars located in the inner parsecs of the Galactic Center (GC). Compelling evidence for the presence of a numerous population of neutron stars has been reported in the literature, turning this region into a very interesting place to look for CWs. in this search, data from the full O3 LiGO-Virgo run in the detector frequency band [10,2000] Hz have been used. No significant detection was found and 95% confidence level upper limits on the signal strain amplitude were computed, over the full search band, with the deepest limit of about 7.6×10−26 at ≃142 Hz. these results are significantly more constraining than those reported in previous searches. We use these limits to put constraints on the fiducial neutron star ellipticity and r-mode amplitude. these limits can be also translated into constraints in the black hole mass–boson mass plane for a hypothetical population of boson clouds around spinning black holes located in the GC.

关键词： Cosmic rays & astroparticles Dark matter General relativity Gravitational waves

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