Study of the doubly charmed tetraquark [Formula: see text].

@article{Aaij2022StudyOT,
  title={Study of the doubly charmed tetraquark [Formula: see text].},
  author={LHCb collaboration R. Aaij and A. S. W. Abdelmotteleb and Carlos Abellan Beteta and F. J. Abudinen Gallego and Thomas Ackernley and Bernardo Adeva and Marco Adinolfi and Hossein Afsharnia and Christina Agapopoulou and Christine A. Aidala and S. Aiola and Ziad Ajaltouni and Simon Akar and Johannes Albrecht and Federico Alessio and Michael Thomas Alexander and Alejandro Alfonso Albero and Zakariya Aliouche and Georgy Alkhazov and Paula Alvarez Cartelle and Sandra Amato and Jennifer Amey and Y. Amhis and L. An and Lucio Anderlini and Aleksei Andreianov and Mirco Andreotti and Flavio Archilli and Alexander Artamonov and Marina Artuso and Kenenbek Arzymatov and Elie Aslanides and Michele Atzeni and Benjamin Audurier and Sebastian Bachmann and Marie Bachmayer and John Back and Pablo Baladron Rodriguez and Vladislav Balagura and Wander Baldini and Juan Baptista Leite and Michael Barbetti and R. J. Barlow and Sergey Barsuk and William Barter and Matteo Bartolini and Fedor Baryshnikov and J. M. Basels and S. Bashir and Giovanni Bassi and Baasansuren Batsukh and Alexander Battig and Aurelio Bay and Ariane L. Beck and Maik Becker and F Bedeschi and I. Bediaga and Andrew Beiter and Vladislav Belavin and Samuel Belin and Violaine Bell{\'e}e and Konstantin Belous and I. N. Belov and I. Belyaev and Giovanni Bencivenni and E. Ben-Haim and Alexander V. Berezhnoy and Roland Bernet and Daniel Berninghoff and Harris Conan Bernstein and Claudia Bertella and A. Bertolin and Christopher Betancourt and Federico Betti and Ia. Bezshyiko and Srishti Bhasin and Jihyun Bhom and Lingzhu Bian and Martin Stefan Bieker and Simone Bifani and P. Billoir and Matthew Birch and Fionn Caitlin Ros Bishop and Alexandre Bitadze and Andrea Bizzeti and Mikkel Bj{\o}rn and Michele Piero Blago and Thomas Blake and Fr{\'e}d{\'e}ric Blanc and Steven Blusk and Dana Seman Bobulska and Julian Alexander Boelhauve and {\'O}scar Boente Garc{\'i}a and Thomas Julian Boettcher and A. Boldyrev and Alexander E. Bondar and Nikolay Bondar and Silvia Borghi and Maxim Borisyak and M Borsato and Jozef Tomasz Borsuk and Sonia Amina Bouchiba and Themis Bowcock and Alexandre F. Boyer and C. Bozzi and Matthew John Bradley and Svende Annelies Braun and A. Brea Rodriguez and Jolanta Brodzicka and Arnau Brossa Gonzalo and Davide Brundu and Annarita Buonaura and Laura Buonincontri and Austin Burke and Christopher Burr and Albert Bursche and Anatoly Butkevich and J. Butter and Jan A. N. Buytaert and Wiktor Byczynski and Sandro Cadeddu and Hao Cai and Roberto Calabrese and Lukas Calefice and Liliet Calero Diaz and Stefano Cal{\'i} and Ryan Calladine and Marta Calvi and Miriam Calvo Gomez and Patr{\'i}cia Camargo Magalh{\~a}es and Pierluigi Campana and Angel Fernando Campoverde Quezada and Simonetta Capelli and L. Capriotti and A. Carbone and Giovanni Carboni and Roberta Cardinale and Alessandro Cardini and Ina Carli and Paolo Carniti and Leon David Carus and Kazuyoshi Carvalho Akiba and Adriana C. Vidal and Gianluigi Casse and Marco Cattaneo and G Cavallero and Sara Celani and Jacopo Cerasoli and Daniel {\vC}ervenkov and A. J. Chadwick and Matthew George Chapman and Matthew John Charles and Ph. Charpentier and Georgios Chatzikonstantinidis and Carlos A. Barajas and M. Chefdeville and C. H. Chen and S. J. Chen and Aleksei Chernov and Veronika Georgieva Chobanova and Serhii Cholak and M. Chrzaszcz and Alexsei Chubykin and Vladimir Chulikov and Paolo Ciambrone and Maria Flavia Cicala and Xabier Cid Vidal and Gregory Max Ciezarek and P. E. L. Clarke and Marco Clemencic and Harry Victor Cliff and Joel Closier and John Leslie Cobbledick and Victor Coco and Jo{\~a}o A. B. Coelho and Julien Cogan and Eric Cogneras and Lucian Nicolae Cojocariu and Paula Collins and Tommaso Colombo and Liliana Congedo and Andrea Contu and Naomi Cooke and George Coombs and Imanol Corredoira and Gloria Corti and Cayo Mar Costa Sobral and Benjamin Couturier and Daniel C. Craik and J. Crkovsk'a and Melissa Maria Cruz Torres and Robert Currie and C. L. Da Silva and S. T. Dadabaev and L. Dai and Elena Dall’Occo and Jeremy Peter Dalseno and Carmelo D’Ambrosio and A V Danilina and Philippe d'Argent and John E. Davies and Adam C. S. Davis and O. De Aguiar Francisco and K. De Bruyn and S. De Capua and Michel De Cian and Jussara M. de Miranda and Leandro de Paula and Marilisa De Serio and Dario De Simone and Patrizia De Simone and F. De Vellis and J. A. de Vries and Cameron Thomas Dean and Francesco Debernardis and Daniel Decamp and V. Dedu and Luigi Del Buono and Blaise Delaney and Hans Peter Dembinski and Adam Mateusz Dendek and Vadym Denysenko and Denis Derkach and Olivier Deschamps and Fabrice Desse and Francesco Dettori and Biplab Dey and Alessandro Di Cicco and Pasquale Di Nezza and Sergey Didenko and Lorena Dieste Maronas and H. B. Dijkstra and Vasyl Dobishuk and C. Dong and Amanda May Donohoe and F. Dordei and A. C. dos Reis and Lauren Douglas and Anatoliy Dovbnya and Anthony Gavin Downes and Maciej Wojciech Dudek and Laurent Dufour and Viacheslav Duk and Paolo Durante and J. Matthew Durham and Deepanwita Dutta and Agnieszka Dziurda and Alexey Dzyuba and Sajan Easo and Ulrik Egede and Victor Egorychev and Semen Eidelman and Stephan Eisenhardt and Surapat Ek-In and Lars Eklund and Scott Ely and Alexandru Ene and Eliane Epple and Stephan Escher and Jonas Eschle and Sevda Esen and Timothy Evans and Antonio Falabella and J. Fan and Y. Fan and Bo Fang and Stephen Farry and Davide Fazzini and M. F'eo and Antonio Fern{\'a}ndez Prieto and A. D. Fernez and Frank Ferrari and Larissa Ferreira Lopes and Fernando Luiz Ferreira Rodrigues and Silvia Ferreres Sole and Martina Ferrillo and Massimiliano Ferro-Luzzi and Sergey Filippov and Rosa Anna Fini and Massimiliano Fiorini and Miroslaw Firlej and K. M. Fischer and D. S. Fitzgerald and Conor Fitzpatrick and Tomasz Fiutowski and Aristeidis Fkiaras and Frederic Fleuret and Maxine Fontana and Flavio Fontanelli and Roger W Forty and D. Foulds-Holt and Vinicius Franco Lima and M. Franco Sevilla and M. Frank and Edoardo Franzoso and Giulia Frau and Christopher M. Frei and David Anthony Friday and J Fu and Quentin Fuehring and Emmy Pauline Maria Gabriel and Giuliana Galati and Abraham Gallas Torreira and Domenico Galli and Silvia Gambetta and Yuyue Gan and Miriam Gandelman and Paolo Gandini and Y. N. Gao and Michela Garau and L. M. Garcia Martin and Paula Garc{\'i}a Moreno and Juli{\'a}n Garc{\'i}a Pardi{\~n}as and Beatriz Garc{\'i}a Plana and Felipe Andres Garcia Rosales and Ll. Garrido and Clara Gaspar and Robbert Erik Geertsema and David Gerick and Louis Lenard Gerken and Evelina Mihova Gersabeck and M. Gersabeck and Tim Gershon and Dawid Gerstel and Luca Giambastiani and Val Gibson and H. K. Giemza and A. Gilman and M. Giovannetti and Alessandra Giovent{\`u} and Pere Gironella Gironell and L. Giubega and Carmen Giugliano and Konstantin Gizdov and E. L. Gkougkousis and V. V. Gligorov and Carla Gobel and Elisabet Golobardes and Dmitry Golubkov and Andrey Golutvin and Agostinho Gomes and S. Gomez Fernandez and Fernanda Gonçalves Abrantes and Mateusz Goncerz and Guanghua Gong and Petr Andreevich Gorbounov and Igor Vladimirovich Gorelov and Claudio Gotti and Ekaterina Govorkova and Jascha Peter Grabowski and Thomas Grammatico and L. a. Granado Cardoso and E. Graug'es and Elena Graverini and Giacomo Graziani and Alina Grecu and Lex Marinus Greeven and Nathan Grieser and Lucia Grillo and Sergey Gromov and B. r. Gruberg Cazon and Chun-wei Gu and Marco Guarise and Manuel Guittiere and P. A. Gunther and Evgeny Gushchin and Andreas Guth and Y. Guz and Thierry Gys and T. Hadavizadeh and Guido Haefeli and Christophe Haen and Jakob Haimberger and Tabitha Halewood-leagas and Phoebe Meredith Hamilton and J. P. Hammerich and Qundong Han and X. Han and Thomas Henry Hancock and Esben Bork Hansen and Stephanie Hansmann-Menzemer and Neville Harnew and T J Harrison and Christoph Hasse and Mark Hatch and J. J. He and Malte Hecker and Kevin Heijhoff and Kevin Heinicke and Arthur Hennequin and Karol Hennessy and Linda Henry and Johannes Heuel and Adl{\`e}ne Hicheur and Donal Hill and Martha Hilton and Sophie Elizabeth Hollitt and R. Hou and Y. Hou and J. B. Hu and W. L. Hu and X. Hu and W. Huang and X Huang and Wouter Hulsbergen and Ross John Hunter and Mikhail Hushchyn and David Hutchcroft and Daniel Hynds and Philipp Ibis and Marek Idzik and Dmitrii Ilin and Philip Ilten and Alexander Inglessi and Artur Ishteev and Kuzma Ivshin and R. Jacobsson and Horst Jage and S. Jakobsen and Eddy Jans and Brij Kishor Jashal and Abolhassan Jawahery and Vukan Jevtic and Feng Jiang and M. John and D. Johnson and C. Jones and Thomas Peter Jones and Beat Jost and Nathan Philip Jurik and Shruthi Kadavath and Sergii Kandybei and Y. Kang and Matthias Karacson and Maksim Karpov and Floris Keizer and David Melvin Keller and M. Kenzie and Tjeerd Ketel and Basem Khanji and Anastasiia Kharisova and Sergei Kholodenko and Thomas Kirn and Veronica Soelund Kirsebom and Ouail Kitouni and Suzanne Klaver and N. Kleijne and Konrad Klimaszewski and Maria Kmie{\'c} and Serhii Koliiev and Almagul Kondybayeva and Anatoly Konoplyannikov and Paweł Kopciewicz and Renata Kope{\vc}n{\'a} and Patrick Koppenburg and Maxim Korolev and I. P. Kostiuk and Oleksander Kot and Sofia Kotriakhova and P. Kravchenko and Leonid V. Kravchuk and Rafal Krawczyk and M. Kreps and Felix Johannes Kress and Sophie Katharina Kretzschmar and Pavel Krokovny and Wojciech Krupa and Wojciech Krzemień and Marcin Kucharczyk and Vasily Kudryavtsev and Hilbrand Steffen Kuindersma and Gerd J. Kunde and Tengiz Kvaratskheliya and Daniel Lacarr{\`e}re and G. D. Lafferty and Adriano Lai and Andrea Lampis and Davide Lancierini and John Jake Lane and Richard Lane and Gaia Lanfranchi and Ch. Langenbruch and Jan Langer and Oliver Lantwin and Thomas Latham and Federico Lazzari and R. Le Gac and S. H. Lee and R{\'e}gis Lef{\`e}vre and Alexander Leflat and Sergey Legotin and O. Leroy and Tadeusz Lesiak and Blake Leverington and H Li and P. R. Li and S. Li and Y. Y. Li and Z. Li and Xiaoting Liang and T. Lin and Rolf Lindner and Vitalii Lisovskyi and Roman Litvinov and G H Liu and H. B. Liu and Q. Liu and S. Liu and A. Lobo Salvia and Angelo Loi and Julian Lomba Castro and Iain Longstaff and Jos{\'e} Helder Lopes and Santiago Soli{\~n}o and G. Lovell and Y. Lu and Chiara Lucarelli and Donatella Lucchesi and Stanislav Luchuk and M. Lucio Martinez and Valeriia Lukashenko and Y H Luo and Anna Lupato and Eleonora Luppi and Oliver Lupton and Alberto Lusiani and Xiaorui Lyu and L. Ma and R. C. Ma and Serena Maccolini and F. Machefert and Florin C. Maciuc and Vladimir Macko and Patricia Mackowiak and Samuel Maddrell-Mander and Olga Madejczyk and Lakshan Ram Madhan Mohan and Oleg Maev and Artem Maevskiy and Dmitrii Maisuzenko and Maciej Majewski and Jakub Jacek Malczewski and Sneha Sirirshkumar Malde and Bartosz Piotr Malecki and Alexander Malinin and Timofei Maltsev and Hanna Malygina and G. Manca and Giampiero Mancinelli and Daniele Manuzzi and Daniele Marangotto and Jan Maratas and Jean François Marchand and Umberto Marini Bettolo Marconi and Saverio Mariani and Carla Marin Benito and Matthieu Marinangeli and J{\"o}rg Marks and Anita M. Marshall and P J Marshall and Gianpasquale Martelli and Giuseppe Martellotti and Loris Martinazzoli and M. Martinelli and D. Martinez Santos and F. Martinez Vidal and A. Massafferri and Marcel Materok and R. Matev and A Cridland Mathad and Viacheslav Matiunin and Clara Matteuzzi and Kara Renee Mattioli and Andrea Mauri and Emilie Maurice and Juan Mauricio and Michael Mazurek and Michael McCann and Lucas Mcconnell and Tamaki Holly Mcgrath and N. T. Mchugh and A. McNab and Ronan McNulty and James Vincent Mead and B. T. Meadows and Gerwin Meier and Nis Meinert and Dmytro Melnychuk and Simone Meloni and Marcel Hubert Marie Merk and Andrea Merli and Lucas Meyer Garcia and Mikhail Mikhasenko and D. A. Milanes and Edward James Millard and Marko Milovanovic and M. -N. Minard and Alessandro Minotti and Luca Minzoni and S. Mitchell and Biljana Mitreska and Dominik Stefan Mitzel and A. Modden and Rizwaan Adeeb Mohammed and Razvan Daniel Moise and Sergey N. Mokhnenko and Titus Mombacher and I. A. Monroy and St'ephane Monteil and Mauro Morandin and G. Morello and Michael J. Morello and Jakub Moroń and Adam Benjamin Morris and Andrew George Morris and Raymond Mountain and H. Mu and Franz Muheim and Mick Mulder and David Robert Muller and Karl T. Muller and Colm Harold Murphy and D{\'o}nal Murray and Piera Muzzetto and P. Naik and T. Nakada and Rajalakshmi Nandakumar and Tara Nanut and Irina Nasteva and M. D. Needham and Ilaria Neri and N. Neri and Sebastian Neubert and Niko Neufeld and Ryan Newcombe and Elisabeth Maria Niel and Simon Nieswand and Nikolay Nikitin and Niklas Stefan Nolte and C. Normand and Cynthia Nunez and Agnieszka Oblakowska-Mucha and Vladimir A. Obraztsov and Thorsten Oeser and Daniel O'Hanlon and S. Okamura and R. G. C. Oldeman and F. Oliva and Mario Edgardo Olivares and C. J. Gerco Onderwater and Robert O'neil and Juan Otalora Goicochea and Tatiana Ovsiannikova and P. H. Owen and Arantza Oyanguren and Klaas Padeken and Bhagyashree Pagare and Preema Rennee Pais and Tommaso Pajero and A. Palano and Matteo Palutan and Y Pan and Gennady Panshin and Antonios Papanestis and Marco Pappagallo and Luciano Libero Pappalardo and Cheryl Pappenheimer and William Parker and Christopher Parkes and Barbara Passalacqua and Giovanni Passaleva and Alessandra Pastore and M. Patel and Claudia Patrignani and Christine Pawley and Alex Pearce and Antonio Pellegrino and Monica Pepe Altarelli and Stefano Perazzini and Dmitrii Pereima and A. Pereiro Castro and Pascal Perret and Marko Petri{\vc} and Konstantinos Petridis and Alessandro Petrolini and Aleksandr Petrov and Stefano Petrucci and Marco Petruzzo and Thi Thuy Hang Pham and Anton Philippov and Lorenzo Pica and Mauro Piccini and Boleslaw Pietrzyk and G. Pietrzyk and Martina Pili and Davide Pinci and Flavio Pisani and Marco Pizzichemi and Resmi P.K and V. M. Placinta and Jonathan Plews and Maximo Plo Casasus and Francesco Polci and Marco Poli Lener and Mariia Poliakova and Anton Poluektov and Natalia Polukhina and Ivan Polyakov and Erica Polycarpo and S{\'e}bastien Ponce and Dmitry Popov and Sergei Popov and Stanislav Poslavskii and Kodassery Prasanth and Laura Promberger and Claire Prouv{\'e} and Valery M. Pugatch and V{\'e}ronique Puill and Hannah Pullen and Giovanni Punzi and H. Qi and Wei Qian and J. Qin and Nian Qin and Renato Quagliani and Boris Quintana and Naomi Veronika Raab and Raul Iraq Rabadan Trejo and Bartlomej Rachwal and Jonas Rademacker and M. Rama and Miguel Ramos Pernas and Murilo Santana Rangel and Fedor Ratnikov and G. Raven and M{\'e}ril Reboud and Federico Leo Redi and Florian Reiss and Clara Remon Alepuz and Zhuyin Ren and Victor Renaudin and Roberto Ribatti and Stefania Ricciardi and Kurt Rinnert and Patricia Robbe and Gary Robertson and Ana Barbara Rodrigues and E. Rodrigues and J. A. Rodriguez Lopez and Eloy Rodr{\'i}guez and Alexandra Paige Rollings and P. Roloff and Vladimir Romanovskiy and Marcos Romero Lamas and Antonio Romero Vidal and Jordan Daniel Roth and Marcello Rotondo and Matthew Scott Rudolph and Thomas Ruf and R. A. Ruiz Fernandez and Joan Ruiz Vidal and Artem Ryzhikov and Jakub Ryzka and J. J. Saborido Silva and Naylya Sagidova and Niladribihari Sahoo and Biagio Saitta and Matteo Salomoni and Cristina Sanchez Gras and Roberta Santacesaria and Cibr{\'a}n Santamarina R{\'i}os and Marco Santimaria and Emanuele Santovetti and Danila Saranin and Gediminas Sarpis and Minaugas Sarpis and Alessio Sarti and Celestina Satriano and Alessia Satta and Miroslav Saur and Darya Savrina and Halime Sazak and Luke George Scantlebury Smead and Anna Scarabotto and Stefan Schael and S. Scherl and Manuel Tobias Schiller and Heinrich Schindler and Michael Schmelling and Brian Paul Schmidt and Stefan Schmitt and O. Schneider and Andreas Schopper and Maxime Schubiger and Sebastian Schulte and M. H. Schune and Rainer Schwemmer and Barbara Sciascia and Sara Sellam and Alexander Semennikov and M. Senghi Soares and Antonino Sergi and Nicola Serra and Lorenzo Sestini and Alex Seuthe and Yujiao Shang and D. Shangase and Mikhail Shapkin and I.V. Shchemerov and L. Shchutska and T. G. Shears and Lev I. Shekhtman and Z. Shen and Vladimir Shevchenko and Edward Brendan Shields and Yohei Shimizu and E. Shmanin and Joseph David Shupperd and Benedetto Gianluca Siddi and Rafael Silva Coutinho and Gabriele Simi and Saverio Simone and Nicola Anne Skidmore and T. Skwarnicki and M. W. Slater and I. Slazyk and Jennifer Clare Smallwood and John Gordon Smeaton and Anastasia Smetkina and E. S. Smith and M. N. K. Smith and Aleksandra Snoch and M. Senghi Soares and La{\'i}s Soares Lavra and Michael D. Sokoloff and F. J. P. Soler and Aleksandr Solovev and I. N. Solovyev and Felipe Luan Souza De Almeida and B. Souza De Paula and Bernhard Spaan and Elisabetta Spadaro Norella and P. Spradlin and Federico Stagni and Marian Stahl and S. Stahl and S. Stanislaus and Olaf Steinkamp and O. V. Stenyakin and Holger Stevens and Sheldon Stone and Mihai Straticiuc and Daria Strekalina and Fidan Suljik and J Sun and L. Sun and Y. Sun and Peter Svihra and Paul Nathaniel Swallow and Krzysztof Swientek and Adam Szabelski and Tomasz Szumlak and Maciej Pawel Szymanski and Shantam Taneja and Alistair R. Tanner and M. D. Tat and A. Terentev and Frederic Teubert and Eric Thomas and David J. Thompson and Kayleigh Anne Thomson and Vincent Tisserand and S T'jampens and Mark Tobin and Luca Tomassetti and X. Tong and Diego Torres Machado and Da Yu Tou and Ekaterina Trifonova and C. Trippl and Giulia Tuci and Alison Maria Tully and Niels Tuning and Artur Ukleja and Daniel Joachim Unverzagt and Eduard Ursov and Andrii Usachov and Andrey Ustyuzhanin and Ulrich Uwer and Alexander Vagner and Vincenzo Maria Vagnoni and Andrea Valassi and Giovanni Valenti and N{\'u}ria Valls Canudas and Martinus van Beuzekom and Maarten van Dijk and H. van Hecke and Eric van Herwijnen and Charlotte Barbara Van Hulse and Maarten van Veghel and Ricardo V{\'a}zquez G{\'o}mez and P. V{\'a}zquez Regueiro and Carlos V'azquez Sierra and Stefania Vecchi and J. J. Velthuis and M. Veltri and Aravindhan Venkateswaran and Michele Veronesi and M. Vesterinen and Daniel Evangelho Vieira and Maria Vieites Diaz and Harald Viemann and Xavier Vilas{\'i}s-Cardona and Eva Figueras and A. Villa and Pascal Vincent and Fabien Volle and Dorothea vom Bruch and Alexey Vorobyev and Vitaly Vorobyev and Nikolai Voropaev and Kimberley Keri Vos and Roland Waldi and J. J. Walsh and C. C. Wang and J. C. Wang and M. Wang and R. Wang and Y. Wang and Z. R. Wang and J. A. Ward and Nigel Keith Watson and Steffen Georg Weber and David Websdale and Constantin Weisser and Benedict Donald C Westhenry and Dylan Jaide White and Mark Whitehead and Andrew Wiederhold and Dirk Wiedner and G. R. Wilkinson and Mark C. Wilkinson and Ifan Williams and M. P. Williams and M. R. J. Williams and Fergus Wilson and Wojciech Wiślicki and Mariusz Witek and Lukas Witola and Guy Wormser and Stephen Wotton and H. Y. Wu and Kenneth Wyllie and Zhiyu Xiang and D. Xiao and Y. G. Xie and Ao Xu and J. J. Xu and L. Xu and M Xu and Q. N. Xu and Z. Xu and D Yang and S. M. Yang and Y. Y. Yang and Z. W. Yang and Y. Yao and Lauren Emma Yeomans and Hang Yin and J. Y. Yu and X. Q. Yuan and O. P. Yushchenko and E. Zaffaroni and Mikhail Zavertyaev and Milosz Zdybal and O. Zenaiev and Ming Zeng and D. Zhang and L. Zhang and S. Q. Zhang and Y. Zhang and A. V. Zharkova and Alexey Zhelezov and Y. Zheng and T L Zhou and X. J. Zhou and Y. Zhou and Valeriia Zhovkovska and X. L. Zhu and Z. Zhu and Valery Zhukov and Jennifer Brigitta Zonneveld and Quan Zou and S. Zucchelli and Davide Zuliani and Gianluca Zunica},
  journal={Nature communications},
  year={2022},
  volume={13 1},
  pages={
          3351
        }
}
Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D0D0π+ mass spectrum just below the D*+D0 mass threshold produced in proton-proton collisions… 

Doubly charmed strange tetraquark

The LHCb Experiment at CERN has discovered an exotic meson Tcc = ccūd̄ decaying to D Dπ through the channel D∗+D0, with a mass around 3875 MeV/c [1, 2]. This mass is just below that for which the

Antiheavy-Antiheavy-Light-Light Four-Quark Bound States

We present our recent results on antiheavy-antiheavy-light-light tetraquark systems using lattice QCD. Our study of the ¯ 𝑏 ¯ 𝑏𝑢𝑠 four-quark system with quantum numbers 𝐽 𝑃 = 1 + and the ¯ 𝑏 ¯

Impact of clustering inside compact tetraquarks

Due to the reducibility of tetraquark operators into mesonic clusters, a strong interplay exists in tetraquarks between compact and molecular structures. This issue is studied within an effective