Study of the doubly charmed tetraquark $${{{{{{\rm{T}}}}}}}_{{{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}}^{+}$$
R Aaij,Ahmed Sameh Wagih Abdelmotteleb,Carlos Abellán Beteta,F. J. Abudinen Gallego,Thomas Ackernley,Adeva, B.,Adinolfi, M.,Hossein Afsharnia,C. Agapopoulou,Christine Angela Aidala,Salvatore Aiola,Z Ajaltouni,Simon Akar,Johannes Albrecht,Federico Alessio,Michael Alexander,A. Alfonso Albero,Zakariya Aliouche, G Alkhazov,Paula Alvarez Cartelle,Sandra Amato,Jake Lewis Amey,Yasmine Amhis,Liupan An,Lucio Anderlini,A Andreianov,M. Andreotti,Flavio Archilli,Alexander Artamonov,Artuso, M.,Kenenbek Arzymatov,E Aslanides,M. Atzeni,B. Audurier,Bachmann, S.,M Bachmayer,Back, J. J.,Pablo Baladron Rodriguez,Vladislav Balagura,Wander Baldini,Juan Baptista Leite,M. Barbetti,R J Barlow,S Barsuk,William Barter,M. Bartolini,Fedor Baryshnikov,J. M. Basels,Saliha Bashir,Bassi, G.,B Batsukh,Alexander Battig,Aurelio Bay,A Beck,M Becker,Franco Bedeschi,Ignacio Bediaga,A Beiter,Vladislav Belavin,Samuel Belin,V Bellee,Konstantin Belous,I Belov,Ivan Belyaev,G Bencivenni,Eli Ben-Haim,Alexander Berezhnoy,Roland Bernet,Daniel Berninghoff,Harris Conan Bernstein,Bertella, C.,Alessandro Bertolin,C. Betancourt,F Betti,Ia Bezshyiko,Srishti Bhasin,Jihyun Bhom,Lingzhu Bian,Martin Stefan Bieker,Simone Bifani,P. Billoir,M. Birch,Fionn Caitlin Ros Bishop,A Bitadze,A Bizzeti, Mikkel Bj├Ėrn,Blago, M. P.,Blake, T.,F Blanc,Steven Blusk,Dana Bobulska,Julian Alexander Boelhauve,Oscar Boente Garcia,T Boettcher,A Boldyrev,Alexander Bondar,Bondar, N.,Silvia Borghi,Maxim Borisyak,Martino Borsato,Borsuk, J. T.,Sonia Amina Bouchiba,T J V Bowcock,A. Boyer,C Bozzi,M. J. Bradley,S Braun,Alexandre Brea Rodriguez,Brodzicka, J.,A Brossa Gonzalo,D. Brundu,A Buonaura,L. Buonincontri,Aodhan Tomas Burke,C Burr,Albert Bursche,Anatoly Butkevich,J S Butter,Jan Buytaert,W Byczynski,S. Cadeddu,Hao Cai,Roberto Calabrese,L Calefice,Liliet Calero Diaz,Stefano Cali,Ryan Calladine,Marta Calvi,Miriam Calvo Gomez,P. Camargo Magalhaes,Pierluigi Campana,Angel Fernando Campoverde Quezada,Simone Capelli,Lorenzo Capriotti,Angelo Carbone,Giovanni Carboni,R. Cardinale,A Cardini,Ina Carli,Paolo Carniti,L Carus,Kazuyoshi Carvalho Akiba,Antonio Romero Vidal,Gianluigi Casse,Marco Cattaneo,Giovanni Cavallero,Sara Celani,Cerasoli, J.,Cervenkov, D.,Abbie Jane Chadwick,Chapman, M. G.,M Charles,Philippe Charpentier,Georgios Chatzikonstantinidis,Carlos Alberto Chavez Barajas,M Chefdeville,Chen Chen,S Chen,Aleksei Chernov,V Chobanova,Serhii Cholak,M. Chrzaszcz,Chubykin, A.,Chulikov, V.,Paolo Ciambrone,Maria Flavia Cicala,Xabier Cid Vidal,Gregory Ciezarek,Peter Clarke,Marco Clemencic,H V Cliff,Joel Closier,J L Cobbledick,Coco, V.,J A B Coelho,Julien Cogan,Eric Cogneras,Cojocariu, L.,Paula Collins,T. Colombo,L. Congedo,A. Contu,Naomi Cooke,G. Coombs,Corredoira, I.,Corti, G.,C. M. Costa Sobral,B Couturier,D C Craik, Jana Crkovsk├Ī,Melissa Maria Cruz Torres,Currie, R.,Cesar Luiz da Silva,Shakhzod Dadabaev,Lingyun Dai,E Dall'Occo,Jeremy Dalseno, Carmelo d'Ambrosio,Danilina, A., Philippe d'Argent,J E Davies,Adam Davis,O De Aguiar Francisco,K De Bruyn,S De Capua,Michel de Cian,J M De Miranda,L. De Paula,Marilisa de Serio,Dario de Simone,P De Simone,F. De Vellis,Jacco de Vries,Cameron Thomas Dean,F. Debernardis,Daniel Decamp,V. Dedu,L. Del Buono,Blaise Delaney,Dembinski, H. -P.,A. Dendek,Vadym Denysenko,D. Derkach,Olivier Deschamps,Fabrice Desse,Francesco Dettori,Biplab Dey,Alessandro Di Cicco,Pasquale Di Nezza,Didenko, S.,L. Dieste Maronas,Hans Dijkstra,V Dobishuk, Chenzhi Dong,Donohoe, A. M.,Francesca Dordei,Alberto dos Reis,L. Douglas,Anatoliy Dovbnya,Anthony Gavin Downes,M. W. Dudek,Laurent Dufour,Viacheslav Duk,Durante, P.,Durham, J. M.,Dutta, D.,Agnieszka Dziurda,A Dzyuba,S Easo,Ulrik Egede,Victor Egorychev,Semen Eidelman,Stephan Eisenhardt,Surapat Ek-In,Eklund, L.,Ely, S.,Alexandru Ene,Eliane Epple,Stephan Escher,Jonas Nathanael Eschle,Sevda Esen,T Evans,A Falabella,J Fan,Y Fan,Bo Fang,Stephen Farry,Davide Fazzini, Mauricio F├®o,Antonio Fernandez Prieto,Alex Daniel Fernez,Fabio Ferrari,L Ferreira Lopes,F Ferreira Rodrigues,S. Ferreres Sole,M Ferrillo,M Ferro-Luzzi,S. Filippov,R. A. Fini,M Fiorini,Miroslaw Firlej,K M Fischer, Dillon Scott Fitzgerald,C Fitzpatrick,T Fiutowski,Aristeidis Fkiaras,Frederic Fleuret,Marianna Fontana,F Fontanelli,Roger Forty,D. Foulds-Holt,Vinicius Franco Lima,Manuel Franco Sevilla,Markus Frank,E Franzoso,G Frau,Christoph Frei,David Anthony Friday,Jinlin Fu,Quentin Fuehring,Gabriel, E.,G. Galati,Abraham Gallas Torreira,Galli, D.,S Gambetta,Y. Gan,Miriam Gandelman,P. Gandini,Yuanning Gao,Michela Garau,Luis Miguel Garcia Martin,P Garcia Moreno, Juli├Īn Garc├Ła Pardi├▒as,B Garcia Plana,Felipe Andres Garcia Rosales,Lluis Garrido,Clara Gaspar,Robbert Erik Geertsema,D Gerick,Louis Lenard Gerken,E. Gersabeck,M. Gersabeck,Timothy Gershon,D. Gerstel,L. Giambastiani,Valerie Gibson,Henryk Karol Giemza,Alexander Leon Gilman,M. Giovannetti, Alessandra Giovent├╣,Pere Gironella Gironell,L Giubega,C Giugliano,Konstantin Gizdov,E. L. Gkougkousis,V. V. Gligorov, Carla G├Čbel,Elisabet Golobardes,Dmitry Golubkov,A Golutvin,Alvaro Gomes,Sergio Gomez Fernandez,Fernanda Goncalves Abrantes,Mateusz Goncerz,G. Gong,Petr Gorbounov,I. V. Gorelov,C Gotti,Ekaterina Govorkova,J. P. Grabowski,T. Grammatico,L A Granado Cardoso, Eugeni Graug├®s,E Graverini,G. Graziani,Alexandru Grecu,L. M. Greeven,Nathan Allen Grieser,L Grillo,Sergey Gromov,B. R. Gruberg Cazon,Chenxi Gu,M. Guarise,M. Guittiere, Paul Andre G├╝nther,E Gushchin,A. Guth,Yury Guz,Thierry Gys,Thomas Hadavizadeh,G. Haefeli,Christophe Haen,J Haimberger,Tabitha Halewood-Leagas,Phoebe Meredith Hamilton,Jan Patrick Hammerich,Qundong Han,X Han,Thomas Henry Hancock,E. B. Hansen,Stephanie Hansmann-Menzemer,N Harnew,Thomas Harrison,Christoph Hasse,M Hatch,Jibo He,M. Hecker,Heijhoff, K.,K. Heinicke,Arthur Marius Hennequin,K Hennessy,Louis Henry,Johannes Heuel,A Hicheur,D. Hill,Martha Hilton,S E Hollitt,R. Hou,Y. Hou,Hu, J.,Hu, J.,Wenhua Hu, Xiaofan Hu,Wenqian Huang,X Huang,W. Hulsbergen, R J Hunter,Mikhail Hushchyn,Hutchcroft, D.,Daniel Hynds, P Ibis,M Idzik,Dmitrii Ilin,Ilten, P.,A Inglessi,Artur Ishteev,K Ivshin,Richard Jacobsson,H. Jage,Jakobsen, S.,E Jans,Brij Kishor Jashal,Abolhassan Jawahery,V. Jevtic,F. Jiang,Malcolm John,Daniel Johnson,C R Jones,Thomas Peter Jones,Beat Jost,Nathan Jurik,Sabin Hashmi Kalavan Kadavath,S Kandybei,Youen Kang,Matthias Karacson,M Karpov,F Keizer,D. M. Keller,Matthew Kenzie,Tjeerd Ketel,Basem Khanji,Anastasiia Kharisova,S Kholodenko,T Kirn,V S Kirsebom, O Kitouni,Suzanne Klaver,N. Kleijne,K Klimaszewski,M R Kmiec,Serhii Koliiev,Kondybayeva, A., A. Konoplyannikov,P. Kopciewicz,Renata Kopecna,P Koppenburg,Mikhail Korolev, I. Kostiuk, Kot, O.,S Kotriakhova,Polina Kravchenko,L Kravchuk,Rafal Dominik Krawczyk,M. Kreps,F. Kress,S Kretzschmar,Krokovny, P.,Wojciech Krupa,Wojciech Krzemien,M. Kucharczyk,Vasily Kudryavtsev,H S Kuindersma,Gerd Joachim Kunde,T Kvaratskheliya,Daniel Lacarrere,G. Lafferty,A. Lai,Andrea Lampis,Lancierini, D.,Lane, J. J.,Richard Lane,Gaia Lanfranchi,Langenbruch, C.,J Langer,Oliver Lantwin,Latham, T.,Federico Lazzari,Renaud Le Gac,Sook Hyun Lee, Regis Lef├©vre,Alexander Leflat,Sergey Legotin,Olivier Leroy,Tadeusz Lesiak, Leverington, B.,Hengne Li,P Li,Li, S., Y. Li,Yiming Li,Zhuoming Li,X. Liang,Tai-Hua Lin,Rolf Lindner,Vitalii Lisovskyi,R Litvinov,Guoming Liu,H. Liu,Q. Liu,S Liu,A. Lobo Salvia,A Loi,Julian Lomba Castro,I Longstaff,J. H. Lopes,S Lopez Solino,George Holger Lovell,Yu Lu,C. Lucarelli,Donatella Lucchesi,S. Luchuk,M. Lucio Martinez,Lukashenko, V.,Y Luo,A Lupato,Luppi, E.,O Lupton,A. Lusiani,Xiao-Rui Lyu,L Ma,Ruiting Ma,Serena Maccolini,F. Machefert,F. Maciuc,Vladimir Macko,P Mackowiak,Samuel Maddrell-Mander,O. Madejczyk,L R Madhan Mohan,O. Maev,Maevskiy, A.,Dmitrii Maisuzenko,M W Majewski,Malczewski, J. J.,Sneha Malde,Bartosz Malecki,Alexander Malinin,Timofei Maltsev,Hanna Malygina,G. Manca,Giampiero Mancinelli,Daniele Manuzzi,D Marangotto,Jan Maratas,Jean François Marchand,U Marconi,Saverio Mariani,Carla Marin Benito,Matthieu Marinangeli,J Marks,Alexander Mclean Marshall,Marshall, P. J.,G. Martelli,G. Martellotti,Loris Martinazzoli,Maurizio Martinelli,Diego Martinez Santos,Fernando Martinez Vidal,A. Massafferri,Materok, M.,Rosen Matev,Abhijit Mathad,Viacheslav Matiunin,C Matteuzzi,Kara Renee Mattioli,Mauri, A.,Emilie Maurice,Juan Mauricio,M Mazurek,M McCann,L Mcconnell,T. H. Mcgrath,N T Mchugh,A McNab,Ronan Mcnulty,James Vincent Mead,Brian Meadows,Meier, G.,N Meinert,D Melnychuk,S. Meloni,M Merk,A. Merli,Lucas Meyer Garcia,M Mikhasenko,D A Milanes,E Millard,Marko Milovanovic,Marie-Noelle Minard, Alessandro Minotti,Luca Minzoni,Sara Elizabeth Mitchell, B. Mitreska,D. S. Mitzel, Antje M├Čdden,Rizwaan Adeeb Mohammed,Razvan Daniel Moise,S. Mokhnenko, Titus Momb├żcher,I. A. Monroy,Stephane Monteil,M Morandin,G Morello,M J Morello,J Moron,A. B. Morris,A. B. 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R.,Wiedner, D.,Wilkinson, G.,Michael Wilkinson,Ifan Williams,Mike Williams,M Williams,Fergus Wilson,Wojciech Wislicki,M. Witek,Witola, L.,Guy Wormser,Stephen Wotton,H Wu,Kenneth Wyllie,Zhiyu Xiang,Xiao, D.,Yuehong Xie,Ao Xu,Xu, J.,Li Xu,Menglin Xu,Qingnian Xu,Zehua Xu,Xu, Z.,Yang, D.,Yang, S.,Youhua Yang,Zhenwei Yang,Z Yang,Yuezhe Yao,Yeomans, L. E.,Hang Yin,J Yu,X. Yuan,Oleg Yushchenko,Ettore Zaffaroni,Mikhail Zavertyaev,Milosz Zdybal,Oleksandr Zenaiev,Ming Zeng,Dongliang Zhang,Liming Zhang,Shulei Zhang,Shulei Zhang, Y Zhang,Yanxi Zhang,Alina Zharkova,A Zhelezov,Yangheng Zheng, Tianwen Zhou,X. Zhou,Yixiong Zhou,Valeriia Zhovkovska,X Zhu,X Zhu, Zhanwen Zhu,Valery Zhukov,J B Zonneveld, Quan Zou,Stefano Zucchelli,D Zuliani,G. Zunica
Nature Communications(2022)
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摘要
An exotic narrow state in the $D^0D^0\pi^+$ mass spectrum just below the $D^{*+}D^0$ mass threshold is studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1}$ acquired with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The state is consistent with the ground isoscalar $T^+_{cc}$ tetraquark with a quark content of $cc\bar{u}\bar{d}$ and spin-parity quantum numbers $\mathrm{J}^{\mathrm{P}}=1^+$. Study of the $DD$ mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell $D^{*+}$ mesons is confirmed by the $D^0\pi^+$ mass distribution. The mass of the resonance and its coupling to the $D^{*}D$ system are analysed. Resonance parameters including the pole position, scattering length, effective range and compositeness are measured to reveal important information about the nature of the $T^+_{cc}$ state. In addition, an unexpected dependence of the production rate on track multiplicity is observed.
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