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Global wood anatomical perspective on the onset of the Late Antique Little Ice Age (LALIA) in the mid-6th century CE

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science Bulletin 2022年第22期67卷 2336-2344页

作者： Ulf Büntgen Alan Crivellaro Dominique Arseneault Mike Baillie David Barclay Mauro Bernabei Jarno Bontadi Gretel Boswijk David Brown Duncan A.Christie Olga V.Churakova Edward R.Cook Rosanne D’Arrigo Nicole Davi Jan Esper Patrick Fonti Ciara Greaves Rashit M.Hantemirov Malcolm K.Hughes Alexander V.Kirdyanov Paul J.Krusic Carlos Le Quesne Fredrik C.Ljungqvist Michael Mc.Cormick Vladimir S.Myglan Kurt Nicolussi Clive Oppenheimer Jonathan Palmer Chun Qin Frederick Reinig Matthew Salzer Markus Stoffel Max Torbenson Mirek Trnka Ricardo Villalba Nick Wiesenberg Greg Wiles Bao Yang Alma Piermattei Department of Geography University of CambridgeCambridge CB23ENUK Swiss Federal Research Institute(WSL) Birmensdorf 8903Switzerland Global Change Research Centre(CzechGlobe) Brno 60300Czech Republic Department of Geography Faculty of ScienceMasaryk UniversityBrno 61300Czech Republic Forest Biometrics Laboratory Faculty of Forestry“Stefan cel Mare”University of SuceavaSuceava 720229Romania Department of Biology Chemistry and GeographyUniversity of Quebec in RimouskiRimouski Qc.G5L 3A1Canada Archaeology&Palaeoecology School of Natural and Built EnvironmentQueen’s University BelfastBelfast BT71NNUK Department of Geology State University of New York at CortlandCortland NY 13045USA CNR-IBE Institute of BioEconomyNational Research CouncilTrento 38121Italy School of Environment The University of AucklandAuckland 1010New Zealand Laboratorio de Dendrocronología y Cambio Global Universidad Austral de ChileValdivia 509000Chile Center for Climate and Resilience Research(CR) Santiago 8370449Chile Cape Horn International Center(CHIC) Punta Arenas 6200000Chile Institute of Ecology and Geography Siberian Federal UniversityKrasnoyarsk 660041Russia Tree-Ring Laboratory Lamont-Doherty Earth ObservatoryColumbia UniversityPalisades NY 10964USA Department of Environmental science William Paterson UniversityWayne NJ 07470USA Department of Geography Johannes Gutenberg UniversityMainz 55099Germany Institute of Plant and Animal Ecology Ural BranchRussian Academy of SciencesYekaterinburg 620144Russia Ural Institute of Humanities Ural Federal UniversityYekaterinburg 620002Russia Laboratory of Tree-Ring Research University of ArizonaTucson AZ 85721USA Sukachev Institute of Forest SB RAS Krasnoyarsk 660036Russia Department of Physical Geography Bolin Centre for Climate ResearchStockholm UniversityStockholm 10691Sweden Department of History Stockholm UniversityStockholm 10691Sweden Bolin Centre for Climate Research Stockholm UniversityStockholm 10691Sweden Swedish Collegium for Advanced Study

Linked to major volcanic eruptions around 536 and 540 CE, the onset of the Late Antique Little Ice Age has been described as the coldest period of the past two millennia. The exact timing and spatial extent of this exceptional cold phase are, however, still under debate because of the limited resolution and geographical distribution of the available proxy archives. Here, we use 106 wood anatomical thin sections from 23forest sites and 20 tree species in both hemispheres to search for cell-level fingerprints of ephemeral summer cooling between 530 and 550 CE. After cross-dating and double-staining, we identified 89Blue Rings(lack of cell wall lignification), nine Frost Rings(cell deformation and collapse), and 93Light Rings(reduced cell wall thickening) in the Northern Hemisphere. Our network reveals evidence for the strongest temperature depression between mid-July and early-August 536 CE across North America and Eurasia, whereas more localised cold spells occurred in the summers of 532, 540–43, and548 CE. The lack of anatomical signatures in the austral trees suggests limited incursion of stratospheric volcanic aerosol into the Southern Hemisphere extra-tropics, that any forcing was mitigated by atmosphere-ocean dynamical responses and/or concentrated outside the growing season, or a combination of factors. Our findings demonstrate the advantage of wood anatomical investigations over traditional dendrochronological measurements, provide a benchmark for Earth system models, support cross-disciplinary studies into the entanglements of climate and history, and question the relevance of global climate averages.

关键词： Blue Rings Climate extremes Dendrochronology Late Antiquity Tree rings Volcanic eruptions

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Schlegel and the Beginning of Comparative Linguistics in Europe

Schlegel and the Beginning of Comparative Linguistics in Eur...

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作者： Ludmila Kryshtop History of Philosophy Department Peoples' Friendship University of Russia

Schlegel is one of the most famous thinkers and writers of the 19 th century in Germany. This period was interesting because of the spiritual situation which Europe was in and which could be characterized as crisis. It was evident for many outstanding people of that time who tried to find a way out of that. Such way out many of them saw in ancient philosophical and religious thought of India. This cultural phenomenon is known also as Oriental Renaissance. Schlegel was one of the thinkers who represent that. He tried not only to find similarities between European and Indian philosophical thought, religion and culture, but supposed that India was the mother of European spirituality as such. He found a proof to that also in languages. That was the main reason of Schlegel's interest to linguistics. He had a great scientific success in this field of knowledge. In fact he created and developed the concept of linguistic affinity and was the first thinker who tried to build foundations of comparative linguistics as science.

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Control of the phase of the magnetization precession excited by circularly polarized femtosecond-laser pulses:publisher's note

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Photonics Research 2018年第11期6卷 1170-1170页

作者： ALEXANDER I.CHERNOV MIKHAIL A.KOZHALEV ANASTASIIA KHRAMOVA ALEXANDER N.SHAPOSHNIKOVA ANATOLY R.PROKOPOV VLADIMIR N.BERZHANSKY ANATOLY K.ZVEZDIN VLADIMIR I.BELOTELOV russian Quantum Center 45Skolkovskoye shosseMoscow 121353Russia Prokhorov General Physics Institute of the russian Academy of sciences 38 Vavilov StreetMoscow 119991Russia Faculty of Physics Lomonosov Moscow State UniversityLeninskie GoryMoscow 119991Russia Vernadsky Crimean Federal University 4 Vemadskogo ProspektSimferopol 295007Russia

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关键词： Faraday effect Femtosecond pulses Magnetic fields Phase shift Ultrashort pulses Wave propagation

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Ultrafast Optomechanical Terahertz Modulators Based on Stretchable Carbon Nanotube Thin Films

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Ultrafast science 2023年第6期3卷 1-9页

作者： Maksim I.Paukov Vladimir V.Starchenko Dmitry V.Krasnikov Gennady A.Komandin Yuriy G.Gladush Sergey S.Zhukov Boris P.Gorshunov Albert G.Nasibulin Aleksey V.Arsenin Valentyn S.Volkov Maria G.Burdanova Center for Photonics and 2D Materials Moscow Institute of Physics and TechnologyDolgoprudny.Russia Skolkovo Institute of science and Technology MoscowRussia Prokhorov General Physics Institute of the russian Academy of sciences MoscowRussia Laboratory of Advanced Functional Materials Yerevan State UniversityYerevanArmenia Institute of Solid State Physics of the russian Academy of sciences ChernogolovkaRussia.

For terahertz wave applications,tunable and rapid modulation is highly *** studied by means of optical pump-terahertz probe spectroscopy,single-walled carbon nanotube(SWCNT)thin films demonstrated ultrafast carrier recombination lifetimes with a high relative change in the signal under optical excitation,making them promising candidates for high-speed ***,combination of SWCNT thin films and stretchable substrates facilitated studies of the SWCNT mechanical properties under strain and enabled the development of a new type of an optomechanical *** applying a certain strain to the SWCNT films,the effective sheet conductance and therefore modulation depth can be fine-tuned to optimize the designed *** exhibited a photoconductivity change of approximately 2 times of magnitude under the strain because of the structural modification in the SWCNT *** was used to control the terahertz signal with a modulation depth of around 100%without strain and 65%at a high strain operation of 40%.The sensitivity of modulators to beam polarization is also shown,which might also come in handy for the design of a stretchable *** results give a fundamental grounding for the design of high-sensitivity stretchable devices based on SWCNT films.

关键词： strain excitation films

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X-ray absorption spectroscopy study of energy transport in foil targets heated by petawatt laser pulses

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Photonics Research 2018年第4期6卷 234-237页

作者： I. Y. SKOBELEV S. N. RYAZANTSEV D. D. ARICH P. S. BRATCHENKO A. Y. FAENOV T. A. PIKUZ P. DUREY L. DOEHL D. FARLEY C. D. BAIRD K. L. LANCASTER C. D. MURPHY N. BOOTH C. SPINDLOE P. MCKENNA S. B. HANSEN J. COLGAN R. KODAMA N. WOOLSEY S. A. PIKUZ Joint Institute for High Temperatures RAS Moscow 125412 Russia National Research Nuclear University "MEPhl " Moscow 115409 Russia M. V. Lomonosov Moscow State University Moscow 119991 Russia Open and Transdisciplinary Research Initiative Osaka University Osaka 565-0871 Japan Graduated School of Engineering Osaka University Osaka 565-0871 Japan York Plasma Institute Department of Physics University of York York YO10 5DD UK Central Laser Facility STFC Rutherford Appleton Laboratory Didcot OX11 0QX UK Department of Physics SUPA University of Strathclyde Glasgow G40NG UK Sandia National Laboratories Albuquerque New Mexico 87123 USA Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA

X-ray absorption spectroscopy is proposed as a method for studying the heating of solid-density matter excited by secondary X-ray radiation from a relativistic laser-produced plasma. The method was developed and applied to experiments involving thin silicon foils irradiated by 0.5–1.5 ps duration ultrahigh contrast laser pulses at intensities between 0.5 × 10^(20) and 2.5 × 10^(20) W∕cm^2. The electron temperature of the material at the rear side of the target is estimated to be in the range of 140–300 eV. The diagnostic approach enables the study of warm dense matter states with low self-emissivity.

关键词：激光等离子体辐射通讯技术

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Empirical estimates of regional carbon budgets imply reduced global soil heterotrophic respiration

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National science Review 2021年第2期8卷 60-73页

作者： Philippe Ciais Yitong Yao Thomas Gasser Alessandro Baccini Yilong Wang Ronny Lauerwald Shushi Peng Ana Bastos Wei Li Peter A.Raymond Josep G.Canadell Glen P.Peters Rob J.Andres Jinfeng Chang Chao Yue A.Johannes Dolman Vanessa Haverd Jens Hartmann Goulven Laruelle Alexandra G.Konings Anthony W.King Yi Liu Sebastiaan Luyssaert Fabienne Maignan Prabir K.Patra Anna Peregon Pierre Regnier Julia Pongratz Benjamin Poulter Anatoly Shvidenko Riccardo Valentini Rong Wang Grégoire Broquet Yi Yin Jakob Zscheischler Bertrand Guenet Daniel S.Goll Ashley-P.Ballantyne Hui Yang Chunjing Qiu Dan Zhu State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F University CSIRO Oceans and Atmosphere 15. Institute for Geology CEN—Center for Earth System Research and SustainabilityUniversity of Hamburg 16. Department of Earth System ScienceStanford University 17. Department of Earth System ScienceStanford UniversityStanford 18. School of Geographical SciencesNanjing University of Information Science and Technology 19. Department of Ecological SciencesVrije Universiteit Amsterdam 20. Research Institute for Global ChangeJAMSTEC Laboratoire des sciences du Climat et de l'Environnement CEA-CNRS-UVSQ-UPSACLAY Center for Environmental Remote Sensing Chiba University Institute of Soil science and Agrochemistry Siberian Branch of the Russian Academy of Sciences (SB RAS) Tuva State University Republic of Tuva Max Planck Institute for Meteorology NASA Goddard Space Flight Center Biospheric Sciences Lab. 26. Department for Innovation in BiologicalAgro-food and Forest systems (DIBAF)University of Tuscia RUDN University Department of Environmental science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and PreventionInstitute of Atmospheric SciencesFudan University 29. Division of Geological and Planetary SciencesCalifornia Institute of Technology 30. Climate and Environmental Physics and Oeschger Centre for Climate Change ResearchUniversity of Bern 31. Department of Ecosystem and Conservation Sci

Resolving regional carbon budgets is critical for informing land-based mitigation policy. For nine regions covering nearly the whole globe, we collected inventory estimates of carbon-stock changes complemented by satellite estimates of biomass changes where inventory data are missing. The net land–atmospheric carbon exchange(NEE) was calculated by taking the sum of the carbon-stock change and lateral carbon fluxes from crop and wood trade, and riverine-carbon export to the ocean. Summing up NEE from all regions, we obtained a global ‘bottom-up’ NEE for net land anthropogenic CO2uptake of –2.2 ± 0.6 Pg C yr-1consistent with the independent top-down NEE from the global atmospheric carbon budget during 2000–2009. This estimate is so far the most comprehensive global bottom-up carbon budget accounting, which set up an important milestone for global carbon-cycle studies. By decomposing NEE into component fluxes, we found that global soil heterotrophic respiration amounts to a source of CO2of 39 Pg C yr-1with an interquartile of 33–46 Pg C yr-1—a much smaller portion of net primary productivity than previously reported.

关键词： carbon budget human appropriation of ecosystems soil carbon

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Sub-percent precision measurement of neutrino oscillation parameters with JUNO

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Chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Antonio Bergnoli Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan Chang Yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen Yu Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng Yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso Olivia Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Donghua Fan Lei Fan Jian Fang Wenxing Fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei Li-Cheng Feng Qichun Feng Richard Ford Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan Nunzio Guardone Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He Wei He Tobias Heinz Patrick Hellmuth Yuekun Heng Rafael Herrera YuenKeung Ho Yerevan Physics Institute YerevanArmenia UniversiéLibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina China Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North China Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of Chinese Academy of sciences BeijingChina Jilin University ChangchunChina College of Electronic science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-Sen University GuangzhouChina Harbin Institute of Technology HarbinChina University of science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South China HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Institute of Modern Physics Chinese Academy of SciencesLanzhouChina Nanjing University NanjingChina Guangxi University NanningChina East China University of science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an Jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUNO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_(31)^(2),△m_(21)^(2),sin^(2)θ_(12),and sin^(2)θ_(13) oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satellite *** is found that the △m_(21)^(2) and sin^(2)θ_(12) oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_(31)^(2) parameter will be determined to about 0.2%precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUNO

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Holography with high-power CW coherent terahertz source: optical components, imaging, and applications

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Light(Advanced Manufacturing) 2022年第3期3卷 103-119页

作者： Yulia Choporova Boris Knyazev Vladimir Pavelyev Novosibirsk State University 630090 NovosibirskRussia Budker Institute of Nuclear Physics 630090 NovosibirskRussia Samara National Research University 443086 SamaraRussia Image Processing Systems Institute of the RAS-Branch of the FSRC“Crystallography and Photonics”RAS 443001 SamaraRussia

This paper presents the results of 15 years of studies in the field of terahertz holography at the Novosibirsk free electron *** cover two areas:research on obtaining holographic images in the terahertz range and the use of diffractive optical elements to form high-power terahertz radiation fields with specified characteristics(intensity,phase,and polarization),using well-studied and widely applied in the optical range methods of optical(analog),digital,and computer-generated *** experiments were performed with the application of high-power coherent monochromatic frequency-tunable radiation from the Novosibirsk free electron *** features of hologram registration in the terahertz range are ***,technologies,and optical materials for terahertz holographic elements are discussed.A wide range of promising applications of high-power terahertz fields with a given spatial structure is *** results of the study of terahertz holograms recorded as digital holograms,as well as radiation-resistive optical elements realized as computer-synthesized holograms,are presented.

关键词： Terahertz range Holography Diffractive optical elements Imaging,Free electron laser

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Dielectric properties of bismuth-containing pyrochlores:A comparative analysis

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Journal of Advanced Dielectrics 2022年第2期12卷 29-35页

作者： M.V.Talanov E.V.Glazunova V.I.Kozlov S.P.Kubrin A.A.Bush V.M.Talanov K.E.Kamentsev Research Institute of Physics Southern Federal University av.Stachki 193 Rostov-on-Don344090Russia Research Institute of Solid State Electronics Materials MIREA-russian Technological University(RTU MIREA)5th Street of Sokolinaya Gora 22 Moscow 119454Russia Technological Department Platov South-russian State Polytechnic University(NPI)Prosvescheniya Str.132 Novocherkassk 346428Russia

The comparative analysis of the dielectric properties of bismuth-containing pyrochlores with different manifestation of atomic order/disorder was carried *** examined the dielectric properties(including behavior in electric fields)of two pyrochlore compounds:BZN(presumably a composition close to Bi_(1.5)Zn_(0.5)Nb_(1.5)O_(6.5))ceramics with chemical disorder in both A and B cation sublattices and Bi_(2)Ti_(2)O_(7)single crystal with fully chemical ordered *** fundamental differences between the dielectric properties of the BZN ceramics and Bi_(2)Ti_(2)O_(7)single crystal were *** particular,in the dielectric relaxation behavior(which cannot be described via Arrhenius law in the Bi_(2)Ti_(2)O_(7))or in the influence of the electric fields on the dielectric permittivity(split-ting of the field-cooled and zero-field-cooled behaviors was observed for Bi_(2)Ti_(2)O_(7)below estimated freezing temperature).The results of this study highlights the special role of Bi_(2)Ti_(2)O_(7)as a candidate material for studying aspects of geometric frustration related with pyrochlore structure in non-magnetic medium and specifies the future directions of research.

关键词： Pyrochlores relaxor behavior bismuth titanate dielectric permittivity geometric frustration

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Evidence of a J/ψΛstructure and observation of excited■^(-)states in the■b^(-)→J/ψΛK^(-) decay

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science Bulletin 2021年第13期66卷 1278-1287,M0003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 S.Amato Y.Amhis L.An L.Anderlini 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 B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzeti M.Bj┆rn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska 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 A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carniti L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas 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 P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik J.Crkovská M.Cruz Torres R.Currie C.L.Da Silva E.Dall’ Centro Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-ringuet(llr) PalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universita degli Studi di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of sciences KrakówPoland AGH-University of science and Techno

First evidence of a structure in the J/ψΛinvariant mass distribution is obtained from an amplitude analysis of■b^(-)J/ψΛK^(-)*** observed structure is consistent with being due to a charmonium pentaquark with strangeness with a significance of 3.1r including systematic uncertainties and lookelsewhere *** mass and width are determined to be 4458:8±2:9t4:7-1:1 MeV and 17:3±6:5t8:0-5:7 MeV,respectively,where the quoted uncertainties are statistical and *** structure is also consistent with being due to two *** addition,the narrow excited■^(-)states,N■(1690)and■(1820),are seen for the first time in a■b^(-)decay,and their masses and widths are measured with improved *** analysis is performed using pp collision data corresponding to a total integrated luminosity of 9 fb^(-1),collected with the LHCb experiment at centre-of-mass energies of 7,8 and 13 TeV.

关键词： QCD Exotics Pentaquark Spectroscopy Quarkonium Particle and resonance production

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