Observation of structure in the J/ψ-pair mass spectrum

  title={Observation of structure in the J/$\psi$-pair mass spectrum},
  author={LHCb collaboration R. Aaij and Carlos Abellan Beteta and Thomas Ackernley and Bernardo Adeva and Marco Adinolfi and Hossein Afsharnia 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 A. A. Alves and S. Amato and Y. Amhis and L. An and Lucio Anderlini and Guido Andreassi 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 Stephen Baker and Pablo Baladron Rodriguez and Vladislav Balagura and Wander Baldini and Juan Baptista Leite and R. J. Barlow and Sergey Barsuk and William Barter and Matteo Bartolini and Fedor Baryshnikov and J. M. Basels and Giovanni Bassi and Varvara Batozskaya and Baasansuren Batsukh and Alexander Battig and Aurelio Bay and Maurice 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. 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 Emilie Bertholet and Alessandro Bertolin and Christopher Betancourt and Federico Betti and Marc-Olivier Bettler 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 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 Valerio Bocci and Julian Alexander Boelhauve and {\'O}scar Boente Garc{\'i}a and Thomas Julian Boettcher and A. S. 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 T. J. v. Bowcock and Alexandre F. Boyer and C. Bozzi and Matthew John Bradley and Svende Annelies Braun and A. Brea Rodriguez and Michael Brodski and Jolanta Brodzicka and Arnau Brossa Gonzalo and Davide Brundu and Emma Buchanan and Annarita Buonaura and Christopher Burr and Albert Bursche and Anatoly Butkevich and J. S. Butter and Jan A. N. Buytaert and Wiktor Byczynski and Sandro Cadeddu and Hao Cai and Roberto Calabrese 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 Alessandro Camboni and Pierluigi Campana and Daniel Hugo C{\'a}mpora P{\'e}rez 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 Kazuyoshi Carvalho Akiba and Adriana C. Vidal and Gianluigi Casse and Marco Cattaneo and G Cavallero and Sara Celani and Riccardo Cenci and Jacopo Cerasoli and A. J. Chadwick and Matthew George Chapman and M. J. Charles and Ph. Charpentier and Georgios Chatzikonstantinidis and M. Chefdeville and C. H. Chen and S. J. Chen and Aleksei Chernov and S.-G. Chitic and V. Chobanova and Serhii Cholak and M. Chrząszcz and Alexsei Chubykin and Vladimir Chulikov and Paolo Ciambrone and Maria Flavia Cicala and Xabier Cid Vidal and Gregory Max Ciezarek and F. Cindolo 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 Andrea Contu and Naomi Cooke and George Coombs and Samuel Coquereau 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 Elena Dall’Occo and Jeremy Peter Dalseno and Carmelo D’Ambrosio and A V Danilina and Philippe d'Argent and Adam C. S. Davis and Oscar De Aguiar Francisco and Kristof De Bruyn and Stefano 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 J. A. de Vries and Cameron Thomas Dean and William Dean and Daniel Decamp and Luigi Del Buono and Blaise Delaney and Hans Peter Dembinski and Adam Mateusz Dendek and Xoana Denis and Vadym Denysenko and Denis Derkach and O. Deschamps and Fabrice Desse and Francesco Dettori and Biplab Dey and Angelo Di Canto and Pasquale Di Nezza and Sergey Didenko and H. B. Dijkstra and Vasyl Dobishuk and Amanda May Donohoe and F. Dordei and M. Dorigo and A. C. dos Reis and Lauren Douglas and Anatoliy Dovbnya and Anthony Gavin Downes and Kārlis Dreimanis and Maciej Wojciech Dudek and Laurent Dufour and Paolo Durante and J. Matthew Durham and Deepanwita Dutta and Michał Dziewiecki 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 Nathanael Ashton Spencer Farley and Stephen Farry and Davide Fazzini and Petr Fedin and M. F'eo and Placido Fernandez Declara and Antonio Fern{\'a}ndez Prieto and Fabio 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 Conor Fitzpatrick and Tomasz Fiutowski and Frederic Fleuret and Marianna Fontana and Flavio Fontanelli and Roger W Forty 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 Wolfgang Funk and Emmy Pauline Maria Gabriel and Tatiana Gaintseva and Abraham Gallas Torreira and Domenico Galli and Stefano Gallorini 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 David Gascon and Clara Gaspar and Robbert Erik Geertsema and David Gerick and Evelina Mihova Gersabeck and M. Gersabeck and Tim Gershon and Dawid Gerstel and Ph. Ghez and Val Gibson and Alessandra Giovent{\`u} and Pere Gironella Gironell and L. Giubega and Carmen Giugliano and Konstantin Gizdov and Vladimir Vava Gligorov and Carla Gobel and Elisabet Golobardes and Dmitry Golubkov and Andrey Golutvin and Alvaro Gomes and Mateusz Goncerz and Petr Andreevich Gorbounov and Igor Vladimirovich Gorelov and Claudio Gotti and Ekaterina Govorkova and Jascha Peter Grabowski and Ricardo Graciani Diaz and Thomas Grammatico and L. a. Granado Cardoso and E. Graug'es and Elena Graverini and Giacomo Graziani and Alexandru Tudor Grecu and Lex Marinus Greeven and Peter Noel Griffith and Lucia Grillo and Lukas Gruber and Barak Raimond Gruberg Cazon and Chun-wei Gu and Marco Guarise 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 Susan Carol Haines and Phoebe Meredith Hamilton and Qundong Han and X. Han and Thomas Henry Hancock and Stephanie Hansmann-Menzemer and Neville Harnew and T J Harrison and Robert Hart 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 Louis Henry and Johannes Heuel and Adl{\`e}ne Hicheur and Donal Hill and Martha Hilton and Sophie Elizabeth Hollitt and Plamen Hristov Hopchev and J. B. Hu and P. H. Hopchev and W. Huang and Wouter Hulsbergen and Thibaud Humair 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 Kuzma Ivshin and R. Jacobsson and S. Jakobsen and Eddy Jans and Brij Kishor Jashal and Abolhassan Jawahery and Vukan Jevtic and Feng Jiang and M. J. J. John and D. Johnson and C. Jones and Thomas Peter Jones and Beat Jost and Nathan Philip Jurik and Sergii Kandybei and Y. Kang and Matthias Karacson and James Mwangi Kariuki and Nikita Kazeev and Matthieu Kecke and Floris Keizer and Matthew Kelsey and M. Kenzie and Tjeerd Ketel and Basem Khanji and Anastasiia Kharisova and Sergei Kholodenko and K. E. Kim and Thomas Kirn and Veronica Soelund Kirsebom and Ouail Kitouni and Suzanne Klaver and Konrad Klimaszewski 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 Wojciech Kucewicz and Marcin Kucharczyk and Vasily Kudryavtsev and Hilbrand Steffen Kuindersma and Gerd J. Kunde and Tengiz Kvaratskheliya and Daniel Lacarr{\`e}re and George Lafferty and Adriano Lai and Andrea Lampis and Davide Lancierini and John Jake Lane and Richard Lane and Gaia Lanfranchi and Ch. Langenbruch and Oliver Lantwin and Thomas Latham and Federico Lazzari and Renaud 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 L. Li and P. R. Li and X. 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 S. Liu and X. Liu and Angelo Loi and Julian Lomba Castro and Iain Longstaff and Jos{\'e} Helder Lopes and Guillermo Loustau and G. Lovell and Y. Lu 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 X. R. Lyu and L. Ma and Serena Maccolini and F. Machefert and Florin C. Maciuc and Vladimir Macko and Patricia Mackowiak and Samuel Maddrell-Mander and Lakshan Ram Madhan Mohan and Oleg Maev and Artem Maevskiy and Dmitrii Maisuzenko and Maciej Majewski and Sneha Sirirshkumar Malde and Bartosz Piotr Malecki and Alexander Malinin and Timofei Maltsev and Hanna Malygina and G. Manca and Giampiero Mancinelli and Rafel Manera Escalero 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 M. Marinangeli and Pietro Marino and J{\"o}rg Marks and P J Marshall and Giuseppe Martellotti and Loris Martinazzoli and M. Martinelli and Diego Mart'inez Santos and Fernando Mart{\'i}nez Vidal and A. Massafferri and Marcel Materok and R. Matev and A Cridland Mathad and Zolt{\'a}n M{\'a}th{\'e} and Viacheslav Matiunin and Clara Matteuzzi and Kara Renee Mattioli and Andrea Mauri and Emilie Maurice and Michael Mazurek and Michael McCann and Lucas Mcconnell and Tamaki Holly Mcgrath and A. McNab and Ronan McNulty and James Vincent Mead and B. T. Meadows and C{\'e}dric M{\'e}aux 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 Diego Milan{\'e}s and Edward James Millard and M. -N. Minard 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 Titus Mombacher and I. A. Monroy and S. 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 Maitreyee Mukherjee and Mick Mulder and David Robert Muller and Karl T. Muller and Colm Harold Murphy and D{\'o}nal Murray and Piera Muzzetto and Paras 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 T. D. Nguyen and Chung Nguyen-Mau and Elisabeth Maria Niel and Simon Nieswand and Nikolay Nikitin and Niklas Stefan Nolte and Cynthia Nunez and Agnieszka Oblakowska-Mucha and Vladimir A. Obraztsov and Stephen Ogilvy and Daniel O'Hanlon and R. G. C. Oldeman and C. J. Gerco Onderwater and J. D. Osborn and Anna Ossowska and Juan Otalora Goicochea and Tatiana Ovsiannikova and Patrick Haworth Owen and Arantza Oyanguren and Bhagyashree Pagare and Preema Rennee Pais and Tommaso Pajero and A. Palano and Matteo Palutan and Y. X. Pan and Gennady Panshin and Antonios Papanestis and Marco Pappagallo and Luciano Libero Pappalardo and Cheryl Pappenheimer and William Parker and Chris Parkes and C. J. Parkinson and Barbara Passalacqua and Giovanni Passaleva and Alessandra Pastore and M. Patel and Claudia Patrignani and Alex Pearce and Antonio Pellegrino and Monica Pepe Altarelli and Stefano Perazzini and Dmitrii Pereima and Pascal Perret and Konstantinos Petridis and Alessandro Petrolini and Aleksandr Petrov and Stefano Petrucci and Marco Petruzzo and Anton Philippov and Lorenzo Pica and Boleslaw Pietrzyk and G. Pietrzyk and Martina Pili and Davide Pinci and Jacopo Pinzino and Flavio Pisani and Alessio Piucci and V. M. Placinta and Stephen M. Playfer 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 Gabriela Johanna Pomery and S{\'e}bastien Ponce and Alexander Popov and Dmitry Popov and Sergei Popov and Stanislav Poslavskii and Kodassery Prasanth and Laura Promberger and Claire Prouv{\'e} and Valery M. Pugatch and Albert Puig Navarro and Hannah Pullen and Giovanni Punzi and R. Puthumanaillam Krishnankuttyelayath and Wenbin Qian and J. Qin and Renato Quagliani and Boris Quintana and Naomi Veronika Raab and Raul Iraq Rabadan Trejo and Bartolomiej 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 Daniel Stephen Richards and Kurt Rinnert and Patricia Robbe and Arnaud Robert and Gary Robertson and Ana Barbara Rodrigues and Eduardo Rodrigues and J. A. Rodriguez Lopez and Markus Roehrken and Alexandra Paige Rollings 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 Joan Ruiz Vidal and Artem Sergeevich Ryzhikov and Jakub Ryzka and J. J. Saborido Silva and Naylya Sagidova and Niladribihari Sahoo and Biagio Saitta and Cristina Sanchez Gras and Carlos S{\'a}nchez Mayordomo 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 Stefan Schael and Margarete Schellenberg and Manuel Tobias Schiller and Heinrich Schindler and Michael Schmelling and Timon Schmelzer and Burkhard Schmidt and O. Schneider and Andreas Schopper and Henry Schreiner and Maxime Schubiger and Sebastian Schulte and Marie-h{\'e}l{\`e}ne Schune and Rainer Schwemmer and Barbara Sciascia and A. Sciubba and Sara Sellam and Alexander Semennikov and Antonino Sergi and Nicola Serra and Justine Serrano and Lorenzo Sestini and Alex Seuthe and Paul Seyfert and D. Shangase and Mikhail Shapkin and I.V. Shchemerov and L. Shchutska and T. G. Shears and Lev I. Shekhtman and Vladimir Shevchenko and Edward Brendan Shields and E. Shmanin and Joseph David Shupperd and Benedetto Gianluca Siddi and Rafael Silva Coutinho and L. de Silva Oliveira and Gabriele Simi and Saverio Simone and Igor Skiba and Nicola Anne Skidmore and T. Skwarnicki and Mark Slater 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. S. 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 Bruno Souza De Paula and Bernhard Spaan and Elisabetta Spadaro Norella and P. Spradlin and Federico Stagni and Marian Stahl and S. Stahl and Pavol Stefko and Olaf Steinkamp and S. Stemmle and O. V. Stenyakin and Holger Stevens and Sheldon Stone and Simone Stracka and Maria Elena Stramaglia and Mihai Straticiuc and Daria Strekalina and Sergey Strokov 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 Z. Tang and Tobias Tekampe and Frederic Teubert and Eric Thomas and Kayleigh Anne Thomson and Matthew James Tilley and Vincent Tisserand and S T'jampens and Mark Tobin and Siim Tolk and Luca Tomassetti and Diego Torres Machado and Da Yu Tou and M. Traill and Minh T{\^a}m Tran and Ekaterina Trifonova and C. Trippl and Andrei Tsaregorodtsev and Giulia Tuci and Alison Maria Tully and Niels Tuning and A. Ukleja and Daniel Joachim Unverzagt and Andrii Usachov and Andrey Ustyuzhanin and Ulrich Uwer and Alexander Vagner and Vincenzo Maria Vagnoni and Andrea Valassi and Giovanni Valenti and Martinus van Beuzekom 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 Pascal Vincent and Giacomo Vitali and Arseniy Vitkovskiy and Achim Vollhardt and Dorothea vom Bruch and Alexey Vorobyev and Vitaly Vorobyev and Nikolai Voropaev 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 David R. Ward and Heather Mckenzie Wark and Nigel Keith Watson and Steffen Georg Weber and David Websdale and Constantin Weisser and Benedict Donald C Westhenry and Dylan James White and Mark Whitehead and Dirk Wiedner and G. R. Wilkinson and Mark C. Wilkinson and Ifan Williams and M. R. J. 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 Dong Xiao and Y. G. Xie and H. Xing and Ao Xu and J. J. Xu and L. Xu and M Xu and Q. N. Xu and Z. Xu and D 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 Kristian Zarebski 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 Alexey Zhelezov and Y. Zheng and X. J. Zhou and Y. Zhou and X. L. Zhu and Valery Zhukov and Jennifer Brigitta Zonneveld and S. Zhou J. Zucchelli and Davide Zuliani and Gianluca Zunica},
  journal={Science Bulletin},

Figures and Tables from this paper

Interpretation of structure in the di- J/ψ spectrum

Structure in the di-$J/\psi$ mass spectrum observed by the LHCb experiment around 6.9 and 7.2 GeV is interpreted in terms of $J^{PC}=0^{++}$ and $2^{++}$ resonances between a $cc$ diquark and a $\bar

Discovery potential for the LHCb fully charm tetraquark X(6900) state via p¯p annihilation reaction

Inspired by the observation of the fully-charm tetraquark $X(6900)$ state at LHCb, the production of $X(6900)$ in $\bar{p}p\rightarrow J/\psi J/\psi $ reaction is studied within an effective

Revisit the tetraquark candidates in the J/ψJ/ψ mass spectrum

In this article, we introduce a relative P-wave to construct the doubly-charm axialvector diquark operator, then take the doubly-charm axialvector (anti)diquark operator as the basic constituent to

Systematics of fully heavy tetraquarks

In this work, we systematically study the mass spectrum of the fully heavy tetraquark in an extended chromomagnetic model, which includes both color and chromomagnetic interactions. Numerical results

Exotic pentaquark states and Chromomagnetic interaction.

In the framework of the modified chromo-magnetic interaction model, we perform a systematical study on the mass spectrums of the ground pentaquark states with $qqqq\bar{Q}$, $qqqQ\bar{q}$,

Doubly-hidden scalar heavy molecules and tetraquarks states from QCD at NLO

Alerted by the recent LHCb discovery of exotic hadrons in the range (6.2 -- 6.9) GeV, we present new results for the doubly-hidden scalar heavy $(\bar QQ) (Q\bar Q)$ charm and beauty molecules using

Masses of the QQQ¯Q¯ tetraquarks in the relativistic diquark–antidiquark picture

Masses of the ground-state tetraquarks composed from heavy $c$ and $b$ quarks and antiquarks are calculated in the diquark-antidiquark picture in the framework of the relativistic quark model based

About the $J\!/\!\psi\,J\!/\!\psi$ peak of LHCb: fully-charmed tetraquark?

We discuss the interpretation of the $J\!/\!\psi\,J\!/\!\psi$ peak recently seen by the LHCb collaboration at CERN, and take the opportunity to review the experimental and theoretical state of the


The discovery in July 2020 of fully-charm tetraquark led to the need for its theoretical explanation. For investigation of such complex four-quark formation, the modern mathematical apparatus of the

Masses of fully heavy tetraquarks Q Q ¯ Q ¯ Q in an extended relativized quark model

Inspired by recent measurement of possible fully charmed tetraquarks in LHCb Collaboration, we investigate the mass spectra of fully heavy tetraquarks QQ ¯ Q ¯ Q in an extended relativized quark



Measurement of the prompt J/$$\psi $$ψ pair production cross-section in pp collisions at $$\sqrt{s} = 8$$s=8 TeV with the ATLAS detector

The production of two prompt pair events due to double parton scattering is studied using a sample of proton-proton collisions at s=8 TeV, corresponding to an integrated luminosity of 11.4 fb collected in 2012 with the ATLAS detector at the LHC.

Measurement of J/Ψ production in pp collisions at $\sqrt{s}=7$ TeV

The production of $J\hspace{-1.5pt}/\hspace{-0.45pt}\psi$ mesons in proton–proton collisions at $\sqrt{s}=7\ensuremath {~\mathrm {TeV}}$ is studied with the LHCb detector at the LHC. The differential

Production of J/ψ and $ \varUpsilon $ mesons in pp collisions at $ \sqrt{s}=8 $ TeV

A bstractThe production of J/ψ and $ \varUpsilon $ mesons in pp collisions at $ \sqrt{s}=8 $ TeV is studied with the LHCb detector. The J/ψ and $ \varUpsilon $ mesons are reconstructed in the μ+μ−

Baryons with two heavy quarks: Masses, production, decays, and detection

The large number of B c mesons observed by LHCb suggests a sizable cross section for producing doubly heavy baryons in the same experiment. Motivated by this, we estimate masses of the doubly heavy J

Observation of $J/\psi p$ Resonances Consistent with Pentaquark States in $\Lambda_b^0 \to J/\psi K^- p$ Decays

Observations of exotic structures in the J/ψp channel, that we refer to as pentaquark-charmonium states, in Λ0b→J/ψK−p decays are presented. The data sample corresponds to an integrated luminosity of

Search for beautiful tetraquarks in the ϒ(1S)μ+μ− invariant-mass spectrum

A bstractThe ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two b¯$$ \overline{b} $$ quarks, Xbb¯bb¯$$

Fully-charm tetraquarks: $cc\bar{c}\bar{c}$

In this work, we continue to study the mass spectra of fully-heavy tetraquarks $cc\bar{c}\bar{c}$ with the quantum numbers of $J^{PC}=0^{++}, 1^{+-}, 2^{++}$ in the nonrelativistic chiral quark

Spectroscopy and decays of the fully-heavy tetraquarks

We discuss the possible existence of the fully-heavy tetraquarks. We calculate the ground-state energy of the $$bb {\bar{b}} {\bar{b}}$$bbb¯b¯ bound state, where b stands for the bottom quark, in a

Isospin amplitudes in $\Lambda_b^0\to J/\psi \Lambda(\Sigma^0)$ and $\Xi_b^0\to J/\psi \Xi^0(\Lambda)$ decays

Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first

Measurement of the J=w pair production cross-section in collisions at ffiffi s p = 13 TeV

  • J High Energy Phys
  • 2017