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arXiv 2023年

作者： Aiello, S. Albert, A. Garre, S. Alves Aly, Z. Ambrosone, A. Ameli, F. Andre, M. Anghinolfi, M. Anguita, M. Ardid, M. Ardid, S. Aublin, J. Bagatelas, C. Bailly-Salins, L. Baret, B. du Pree, S. Basegmez Becherini, Y. Bendahman, M. Benfenati, F. Berbee, E. Bertin, V. Biagi, S. Boettcher, M. Cabo, M. Bou Boumaaza, J. Bouta, M. Bouwhuis, M. Bozza, C. Brânzaş, H. Bruijn, R. Brunner, J. Bruno, R. Buis, E. Buompane, R. Busto, J. Caiffi, B. Calvo, D. Campion, S. Capone, A. Carenini, F. Carretero, V. Castaldi, P. Celli, S. Cerisy, L. Chabab, M. Chau, N. Chen, A. El Moursli, R. Cherkaoui Cherubini, S. Chiarella, V. Chiarusi, T. Circella, M. Cocimano, R. Coelho, J.A.B. Coleiro, A. Coniglione, R. Coyle, P. Creusot, A. Cruz, A. Cuttone, G. Dallier, R. Darras, Y. De Benedittis, A. De Martino, B. Decoene, V. Del Burgo, R. Di Palma, I. Díaz, A.F. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Dörr, M. Drakopoulou, E. Drouhin, D. Eberl, T. Eddyamoui, A. van Eeden, T. Eff, M. van Eijk, D. El Bojaddaini, I. El Hedri, S. Enzenhöfer, A. Espinosa, V. Ferrara, G. Filipović, M.D. Filippini, F. Fusco, L.A. Gabriel, J. Gal, T. Méndez, J. García Soto, A. Garcia Garufi, F. Oliver, C. Gatius Geißelbrecht, N. Gialanella, L. Giorgio, E. Girardi, A. Goos, I. Gozzini, S.R. Gracia, R. Graf, K. Guderian, D. Guidi, C. Guillon, B. Gutiérrez, M. Haegel, L. van Haren, H. Heijboer, A. Hekalo, A. Hennig, L. Hernández-Rey, J.J. Huang, F. Ibnsalih, W. Idrissi Illuminati, G. James, C.W. Janezashvili, D. de Jong, M. de Jong, P. Jung, B.J. Kalaczyński, P. Kalekin, O. Katz, U.F. Chowdhury, N.R. Khan Kistauri, G. van der Knaap, F. Kooijman, P. Kouchner, A. Kulikovskiy, V. Labalme, M. Lahmann, R. Lakhal, A. Lamoureux, M. Larosa, G. Lastoria, C. Lazo, A. Le Breton, R. Le Stum, S. Lehaut, G. Leonora, E. Lessing, N. Levi, G. Liang, S. Clark, M. Lindsey Longhitano, F. Maderer, L. Majumdar, J. Mańczak, J. Margiotta, A. Marinelli, A. Markou, C. INFN Sezione di Catania Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France c/Catedrático José Beltrán 2 Valencia Paterna46980 Spain Aix Marseille Univ CNRS IN2P3 CPPM Marseille France INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d’Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy University of Granada Dept. of Computer Architecture and Technology/CITIC Granada18071 Spain Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/ Paranimf 1 Gandia46730 Spain Université de Paris CNRS Astroparticule et Cosmologie ParisF-75013 France NCSR Demokritos Institute of Nuclear and Particle Physics Ag. Paraskevi Attikis Athens15310 Greece LPC CAEN Normandie Univ ENSICAEN UNICAEN CNRS IN2P3 6 boulevard Maréchal Juin Caen14050 France Nikhef National Institute for Subatomic Physics PO Box 41882 Amsterdam1009 DB Netherlands University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco INFN Sezione di Bologna v.le C. Berti-Pichat 6/2 Bologna40127 Italy Università di Bologna Dipartimento di Fisica e Astronomia v.le C. Berti-Pichat 6/2 Bologna40127 Italy INFN Laboratori Nazionali del Sud Via S. Sofia 62 Catania95123 Italy North-West University Centre for Space Research Private Bag X6001 Potchefstroom2520 South Africa Instituto Español de Oceanografía Unidad Mixta IEO-UPV C/ Paranimf 1 Gandia46730 Spain University Mohammed I Fac

In the era of precision measurements of the neutrino oscillation parameters, upcoming neutrino experiments will also be sensitive to physics beyond the Standard Model. KM3NeT/ORCA is a neutrino detector optimised for measuring atmospheric neutrinos from a few GeV to around 100 GeV. In this paper, the sensitivity of the KM3NeT/ORCA detector to neutrino decay has been explored. A three-flavour neutrino oscillation scenario, where the third neutrino mass state ν3 decays into an invisible state, e.g. a sterile neutrino, is considered. We find that KM3NeT/ORCA would be sensitive to invisible neutrino decays with 1/α3 = τ3/m3 23, ∆m231 and mass ordering have been studied. No significant effect of neutrino decay on the sensitivity to these measurements has been found. Copyright © 2023, The Authors. All rights reserved.

关键词： Germanium alloys

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Electron spin inversion in fluorinated graphene nanoribbons

arXiv

引用

arXiv 2017年

作者： Rzeszotarski, Bartlomiej Mrenca-Kolasinska, Alina Szafran, Bartlomiej AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We consider a dilute fluorinated graphene nanoribbon as a spin-active element. The fluorine adatoms introduce a local spin-orbit Rashba interaction that induces spin-precession for electron passing by. The spin precession involving a single adatom is infinitesimal and accumulation of the spin precession events with many electron passages under adatoms is necessary to accomplish a spin flip. In order to arrange for this accumulation a circular n-p junction can be introduced to the ribbon by e.g. potential of the tip of an atomic force microscope. Alternatively a fluorinated quantum ring can be attached to the ribbon. We demonstrate that the spin-flip probability can be increased in this manner by as much as three orders of magnitude. The Zeeman interaction introduces spin-dependence of the Fermi wave vectors which changes the electron paths within the disordered system depending on the spin orientation. The effect destroys the accumulation of the spin precession events in the n-p junction. For side attached quantum rings however - for which the electron path is determined by the confinement within the channel - the accumulation of the spin precession is robust against the Zeeman spin splitting. Copyright © 2017, The Authors. All rights reserved.

关键词： Magnetic moments

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The HeRSCheL detector: High-rapidity shower counters for LHCb

arXiv

引用

arXiv 2018年

作者： Carvalho Akiba, K. Alessio, F. Bondar, N. Byczynski, W. Coco, V. Collins, P. Dumps, R. Dzhelyadin, R. Gandini, P. Gruberg Cazon, B.R. Jacobsson, R. Johnson, D. Manthey, J. Mauricio, J. McNulty, R. Monteil, S. Rachwal, B. Ravonel Salzgeber, M. Roy, L. Schindler, H. Stevenson, S. Wilkinson, G. Rio de Janeiro Brazil Geneva Switzerland Gatchina Russia Protvino Russia Department of Physics University of Oxford Oxford United Kingdom FQA ICC Universitat de Barcelona Avinguda Diagonal 647 Barcelona Spain School of Physics University College Dublin Dublin Ireland Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France AGH University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland

The HeRSCheL detector consists of a set of scintillating counters, designed to increase the coverage of the LHCb experiment in the high-rapidity regions on either side of the main spectrometer. The new detector improves the capabilities of LHCb for studies of diffractive interactions, most notably Central Exclusive Production. In this paper the construction, installation, commissioning, and performance of HeRSCheL are presented. Copyright © 2018, The Authors. All rights reserved.

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Study of the lineshape of the χc1(3872) state

引用

Physical Review D 2020年第9期102卷 092005-092005页

作者： R. Aaij C. Abellán Beteta T. Ackernley B. Adeva M. Adinolfi H. Afsharnia C. A. Aidala S. Aiola Z. Ajaltouni S. Akar J. Albrecht F. Alessio M. Alexander A. Alfonso Albero Z. Aliouche G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr. S. Amato Y. Amhis L. An L. Anderlini G. Andreassi A. Andreianov M. Andreotti F. Archilli A. Artamonov M. Artuso K. Arzymatov E. Aslanides M. Atzeni B. Audurier S. Bachmann M. Bachmayer J. J. Back S. Baker P. Baladron Rodriguez V. Balagura W. Baldini J. Baptista Leite R. J. Barlow S. Barsuk W. Barter M. Bartolini F. Baryshnikov J. M. Basels G. Bassi V. Batozskaya B. Batsukh A. Battig A. Bay M. Becker F. Bedeschi I. Bediaga A. Beiter V. Belavin S. Belin V. Bellee K. Belous I. Belyaev G. Bencivenni E. Ben-Haim S. Benson A. Berezhnoy R. Bernet D. Berninghoff H. C. Bernstein C. Bertella E. Bertholet A. Bertolin C. Betancourt F. Betti M. O. Bettler Ia. Bezshyiko S. Bhasin J. Bhom L. Bian M. S. Bieker S. Bifani P. Billoir F. C. R. Bishop A. Bizzeti M. Bjørn M. P. Blago T. Blake F. Blanc S. Blusk D. Bobulska V. Bocci J. A. Boelhauve O. Boente Garcia T. Boettcher A. Boldyrev A. Bondar N. Bondar S. Borghi M. Borisyak M. Borsato J. T. Borsuk S. A. Bouchiba T. J. V. Bowcock A. Boyer C. Bozzi M. J. Bradley S. Braun A. Brea Rodriguez M. Brodski J. Brodzicka A. Brossa Gonzalo D. Brundu E. Buchanan A. Büchler-Germann A. Buonaura C. Burr A. Bursche A. Butkevich J. S. Butter J. Buytaert W. Byczynski S. Cadeddu H. Cai R. Calabrese L. Calero Diaz S. Cali R. Calladine M. Calvi M. Calvo Gomez P. Camargo Magalhaes A. Camboni P. Campana D. H. Campora Perez A. F. Campoverde Quezada S. Capelli L. Capriotti A. Carbone G. Carboni R. Cardinale A. Cardini I. Carli P. Carniti K. Carvalho Akiba A. Casais Vidal G. Casse M. Cattaneo G. Cavallero S. Celani R. Cenci J. Cerasoli A. J. Chadwick M. G. Chapman M. Charles Ph. Charpentier G. Chatzikonstantinidis M. Chefdeville C. Chen S. Chen A. Chernov S.-G. Chitic V. Chobanova S. Cholak M. Chrzaszcz A. Chubykin V. Chulikov P. Ciambrone M. F. Cicala X. Cid Vidal G. Ciezarek F. Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Physik-Institut Universität Zürich Zürich Switzerland Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Instituto Galego de Física de Altas Enerxías (IGFAE) Universidade de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France University of Michigan Ann Arbor USA (associated with Syracuse University Syracuse New York USA) INFN Sezione di Milano Milano Italy University of Cincinnati Cincinnati Ohio USA Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom ICCUB Universitat de Barcelona Barcelona Spain Department of Physics and Astronomy University of Manchester Manchester United Kingdom Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI) Gatchina Russia Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France INFN Sezione di Firenze Firenze Italy Institute of Physics Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland INFN Sezione di Ferrara Ferrara Italy Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI) Protvino Russia Protvino Russia Syracuse University Syracuse New York USA Yandex School of Data Analysis Moscow Russia Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Department of Physics University of Warwick Coventry United Kingdom Imperial College London London United Kingdom Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil INFN Sezione di Genova Genova Italy National University of Science and Technology “MISIS” Mosco

A study of the lineshape of the χc1(3872) state is made using a data sample corresponding to an integrated luminosity of 3 fb−1 collected in pp collisions at center-of-mass energies of 7 and 8 TeV with the LHCb detector. Candidate χc1(3872) and ψ(2S) mesons from b-hadron decays are selected in the J/ψπ+π− decay mode. Describing the lineshape with a Breit-Wigner function, the mass splitting between the χc1(3872) and ψ(2S) states, Δm, and the width of the χc1(3872) state, ΓBW, are determined to be Δm=185.598±0.067±0.068 MeV,ΓBW=1.39±0.24±0.10 MeV, where the first uncertainty is statistical and the second systematic. Using a Flatté-inspired model, the mode and full width at half maximum of the lineshape are determined to be mode=3871.69−0.04−0.13+0.00+0.05 MeV,FWHM=0.22−0.06−0.13+0.07+0.11 MeV. An investigation of the analytic structure of the Flatté amplitude reveals a pole structure, which is compatible with a quasibound D0D¯*0 state but a quasivirtual state is still allowed at the level of 2 standard deviations.

关键词： Hadron-hadron interactions Hadronic decays Mass Hadron colliders Precision measurements

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Effect of picosecond magnetic pulse on dynamics of electron’s subbands in semiconductor bilayer nanowire

arXiv

引用

arXiv 2017年

作者： Chwiej, T. AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. A. Mickiewicza 30 Cracow30-059 Poland

We report on possibility of charge current generation in nanowire made of two tunnel coupled one-dimensional electron waveguides by means of single magnetic pulse lasting up to 20 ps. Existence of interlayer tunnel coupling plays a crucial role in the effect described here as it allows for hybridization of the wave functions localized in different layers which can be dynamically modified by applying a time changeable in-plane magnetic field. Results of time-dependent DFT calculations performed for a bilayer nanowire confining many electrons show that the effect of such magnetic hybridization relies on tilting of electrons’ energy subbands, to the left or to the right, depending on a sign of time derivative of oscillating magnetic field due to the Faraday law. Consequently, the tilted subbands become a source of charge flow along the wire. Strength of such magneto-induced current oscillations may achieve even 0.6µA but it depends on duration of magnetic pulse as well as on charge density confined in nanowire which has to be unequally distributed between both transport layers to observe this effect. Copyright © 2017, The Authors. All rights reserved.

关键词： Electronic structure

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Spin separation and exchange for quantum dots in the Overhauser field

arXiv

引用

arXiv 2017年

作者： Leśnicki, J. Szafran, B. Agh University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We describe the spin and charge dynamics of the system of two electrons confined within a double quantum dot defined in a quantum wire. The spin dynamics is driven by the electron motion in presence of the spin-orbit interaction and the randomly varying local Overhauser field due to the nuclear spins. The Schroedinger equation is solved with the time-dependent configuration interaction method that allows for an exact description of the system dynamics. The procedures of the spin separation, exchange and read-out by the spin to charge conversion all induced by the detuning variation are simulated. The rates of the potential variation that are necessary for the spin separation and spin to charge conversion in the context of the Landau-Zener transitions are determined. The average over random configurations of the hyperfine field produce spin exchange results which qualitatively agree with the experimental data. Copyright © 2017, The Authors. All rights reserved.

关键词： Semiconductor quantum dots

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New opportunities at the photon energy frontier

arXiv

引用

arXiv 2020年

作者： Adam, Jaroslav Aidala, Christine Angerami, Aaron Audurier, Benjamin Bertulani, Carlos Bierlich, Christian Blok, Boris Brandenburg, James Daniel Brodsky, Stanley Bylinkin, Aleksandr Roman, Veronica Canoa Celiberto, Francesco Giovanni Cepila, Jan Chachamis, Grigorios Cole, Brian Contreras, Guillermo d’Enterria, David Dumitru, Adrian Téllez, Arturo Fernández Frankfurt, Leonid Gay Ducati, Maria Beatriz Geurts, Frank da Silveira, Gustavo Gil Giuli, Francesco Goncalves, Victor P. Grabowska-Bold, Iwona Guzey, Vadim Harland-Lang, Lucian Hentschinski, Martin Hobbs, T.J. Jalilian-Marian, Jamal Khoze, Valery A. Kim, Yongsun Klein, Spencer R. Knapen, Simon Klusek-Gawenda, Mariola Krelina, Michal Kryshen, Evgeny Lappi, Tuomas Loizides, Constantin Luszczak, Agnieszka Machado, Magno Mäntysaari, Heikki Martins, Daniel McNulty, Ronan Murray, Michael Nemchik, Jan Noronha-Hostler, Jacquelyn Nystrand, Joakim Papa, Alessandro Pire, Bernard Ploskon, Mateusz Przybycien, Marius Ralston, John P. Teles, Patricia Rebello Royon, Christophe Schenke, Björn Schmidke, William Seger, Janet Stasto, Anna Steinberg, Peter Strikman, Mark Szczurek, Antoni Szymanowski, Lech Takaki, Daniel Tapia Ulrich, Ralf Baillie, Orlando Villalobos Vogt, Ramona Wallon, Samuel Winn, Michael Xie, Keping Xu, Zhangbu Yang, Shuai Zhalov, Mikhail Zhou, Jian Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague Prague Czech Republic Nuclear Science Division Lawrence Berkeley National Laboratory BerkeleyCA United States Department of Physics and Astronomy University of Kansas Lawrence KS United States Lawrence Livermore National Laboratory LivermoreCA United States Department of Physics University of California DavisCA United States AGH University of Science and Technology Cracow Poland Dept. of Physics and Technology University of Bergen Bergen Norway Oak Ridge National Laboratory Oak RidgeTN United States Physics Department Creighton University OmahaNE United States Brookhaven National Laboratory UptonNY United States Dept. of Physics Pennsylvania State University University ParkPA United States UFRGS and UERJ Brazil Petersburg Nuclear Physics Institute of National Research Centre Kurchatov Institute Russia Shandong University Qingdao China CERN Geneva Switzerland IPPP Durham University Durham United Kingdom Universidade Federal de Pelotas Pelotas Brazil Department of Physics and Astronomy Texas A&M University-Commerce CommerceTX United States Universidade Federal do Rio de Janeiro UFRJ Rio de Janeiro Brazil Brazil Benemérita Universidad Autónoma de Puebla Puebla Mexico Physics Division Lawrence Berkeley National Laboratory BerkeleyCA United States Dept. of Physics Columbia University New YorkNY10027 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Astronomy and Theoretical Physics Lund University Lund Sweden Department of Physics Southern Methodist University JLab EIC Center United States Unversity and INFN Rome 2 Via della Ricerca Scientifica 1 Roma00133 Italy PITT PACC University of Pittsburgh PittsburghPA15260 United States Baruch College CUNY New YorkNY10010 United States Departamento de Actuaria Física y Matemáticas Universidad de las Américas Puebla Ex-Hacienda Santa C

Ultra-peripheral collisions (UPCs) involving heavy ions and protons are the energy frontier for photon-mediated interactions. UPC photons can be used for many purposes, including probing low-x gluons via photoproduction of dijets and vector mesons, probes of beyond-standard-model processes, such as those enabled by light-by-light scattering, and studies of two-photon production of the Higgs. Copyright © 2020, The Authors. All rights reserved.

关键词： Photons

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Proposal of an Intelligent, Predictive Fuzzy Controller for Off-Grid Devices

引用

IFAC-PapersOnLine 2016年第25期49卷 523-528页

作者： Bielecki, Andrzej Bielecka, Marzena Ernst, Sebastian AGH University of Science and Technology Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Department of Applied Computer Science Kraków Poland AGH University of Science and Technology Faculty of Geology Geophysics and Environmental Protection Department of Geoinformatics and Applied Computer Science Kraków Poland

Off-grid electrical devices, such as autonomous lamps, can operate without being connected to the power grid thanks to integrated renewable-source based energy generators and storage facilities. However, they may not be able to fulfill all of the user's requirements in unfavourable conditions. Controllers currently used in off-grid devices use simplistic algorithms and strategies. This paper presents a proposal of an intelligent, fuzzy logic-based controller for off-grid devices with prediction and planning capabilities. Artificial neural networks of various types are used for prediction of generator performance, monitoring of component performance and detection of events such as partial malfunction. Fuzzy logic is used for to facilitate the definition of rules reflecting the user's preferences, and to define the internal strategies of the controller. The predicted behaviour of the power-related components is used to select the operating mode which fulfils the prioritised user's requirements to the maximum extent, while minimizing the chance of running out of power. © 2016

关键词： Fuzzy logic Artificial intelligence computer circuits Controllers Electric power transmission networks Forecasting Fuzzy control Fuzzy neural networks Neural networks Component performance Electrical devices Fuzzy logic based controller Internal strategies Off grids Planning capability Storage facilities User's preferences

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Spin-valley resolved photon-assisted tunneling in carbon nanotube double quantum dots

arXiv

引用

arXiv 2017年

作者： Osika, E.N. Szafran, B. AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

We consider the photon-assisted tunneling (PAT) and the Landau-Zener-Stueckelberg (LZS) interference for double quantum dots induced electrostatically along a semiconducting carbon nanotube. An atomistic tight-binding approach and the time-dependent configuration interaction method are employed for description of the systems of a few confined electrons and holes. We reproduce the patterns of the LZS interference recently observed for the quantum double dots describing transport across hole-localized states. Moreover, we indicate that for charge configurations for which the ground-state is Pauli blocked PAT can be used for resolution of the transitions that involve spin-flip or intervalley transitions without the spin-valley conserving background signal. Copyright © 2017, The Authors. All rights reserved.

关键词： Semiconductor quantum dots

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First observation of excited Ωb− states

arXiv

引用

arXiv 2020年

作者： Aaij, R. Beteta, C. Abellán Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C.A. Aiola, S. Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Albero, A. Alfonso Alkhazov, G. Cartelle, P. Alvarez Jr, A.A. Alves Amato, S. Amhis, Y. An, L. Anderlini, L. Andreassi, G. Andreotti, M. Archilli, F. Romeu, J. Arnau Artamonov, A. Artuso, M. Arzymatov, K. Aslanides, E. Atzeni, M. Audurier, B. Bachmann, S. Back, J.J. Baker, S. Balagura, V. Baldini, W. Baranov, A. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Bassi, G. Batozskaya, V. Batsukh, B. Battig, A. Bay, A. Becker, M. Bedeschi, F. Bediaga, I. Beiter, A. Bel, L.J. Belavin, V. Belin, S. Bellee, V. Belous, K. Belyaev, I. Bencivenni, G. Ben-Haim, E. Benson, S. Beranek, S. Berezhnoy, A. Bernet, R. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertholet, E. Bertolin, A. Betancourt, C. Betti, F. Bettler, M.O. Bezshyiko, Ia. Bhasin, S. Bhom, J. Bieker, M.S. Bifani, S. Billoir, P. Bizzeti, A. Bjørn, M. Blago, M.P. Blake, T. Blanc, F. Blusk, S. Bobulska, D. Bocci, V. Garcia, O. Boente Boettcher, T. Boldyrev, A. Bondar, A. Bondar, N. Borghi, S. Borisyak, M. Borsato, M. Borsuk, J.T. Bowcock, T.J.V. Bozzi, C. Bradley, M.J. Braun, S. Rodriguez, A. Brea Brodski, M. Brodzicka, J. Gonzalo, A. Brossa Brundu, D. Buchanan, E. Buonaura, A. Burr, C. Bursche, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Diaz, L. Calero Cali, S. Calladine, R. Calvi, M. Gomez, M. Calvo Magalhaes, P. Camargo Camboni, A. Campana, P. Perez, D.H. Campora Capriotti, L. Carbone, A. Carboni, G. Cardinale, R. Cardini, A. Carniti, P. Akiba, K. Carvalho Vidal, A. Casais Casse, G. Cattaneo, M. Cavallero, G. Celani, S. Cenci, R. Cerasoli, J. Chapman, M.G. Charles, M. Charpentier, Ph. Chatzikonstantinidis, G. Chefdeville, M. Chekalina, V. Chen, C. Chen, S. Chernov, A. Chitic, S.-G. Chobanova, V. Chrzaszcz, M. Chubykin, A. Ciambrone, P. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University 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 Beijing China Institute of Particle Physics Central China Normal University WuhanHubei China Univ. Grenoble Alpes 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 LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay 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-Bicocca Milano Italy INFN Sezione di Milano Milano Italy INFN Sezione di Cagliari Monserrato Italy INFN Sezione di Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma Tor Vergata Roma Italy INFN Sezione di Roma La Sapienza Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Warsaw Poland Horia Hulubei National Institute of Physics and Nuclear Engin

We report four narrow peaks in the Ξb0K− mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1 recorded by the LHCb experiment. Referring to these states by their mass, the mass values are m(Ωb(6316)−) = 6315.64 ± 0.31 ± 0.07 ± 0.50 MeV, m(Ωb(6330)−) = 6330.30 ± 0.28 ± 0.07 ± 0.50 MeV, m(Ωb(6340)−) = 6339.71 ± 0.26 ± 0.05 ± 0.50 MeV, m(Ωb(6350)−) = 6349.88 ± 0.35 ± 0.05 ± 0.50 MeV, where the uncertainties are statistical, systematic and the last is due to the knowledge of the Ξb0 mass. The natural widths of the three lower mass states are consistent with zero, and the 90% confidence-level upper limits are determined to be Γ(Ωb(6316)−) b(6330)−) b(6340)−) b(6350)− peak is 1.4+1−0..08 ± 0.1 MeV, which is 2.5σ from zero and corresponds to an upper limit of 2.8 MeV. The peaks have local significances ranging from 3.6σ to 7.2σ. After accounting for the look-elsewhere effect, the significances of the Ωb(6316)− and Ωb(6330)− peaks are reduced to 2.1σ and 2.6σ respectively, while the two higher mass peaks exceed 5σ. The observed peaks are consistent with expectations for excited Ωb− resonances. Copyright © 2020, The Authors. All rights reserved.

关键词： Mass spectrometry

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