Corpus ID: 211082498

Observation of a new baryon state in the $\Lambda_b^0\pi^+\pi^-$ mass spectrum

  title={Observation of a new baryon state in the \$\Lambda_b^0\pi^+\pi^-\$ mass spectrum},
  author={LHCb collaboration R. Aaij and Carlos Abell{\'a}n Beteta and Thomas Ackernley and Bernardo Adeva and M. Adinolfi and H. Afsharnia and Christine A. Aidala and Salvatore Aiola and Ziad Ajaltouni and Simon Akar and Pietro Albicocco and Johannes Albrecht and Federico Alessio and Magazinov Alexander and A. Alfonso Albero and Georgy Alkhazov and P. Alvarez Cartelle and A. A. Alves and Sandra Amato and Yasmine Amhis and L. An and Letizia Anderlini and G. Andreassi and Mirco Andreotti and Flavio Archilli and A. Artamonov and Marina Artuso and Kenenbek Arzymatov and Elie Aslanides and Michele Atzeni and Benjamin Audurier and Sebastian Bachmann and J. J. Back and S. Baker and Vladislav Balagura and Wander Baldini and Alexander Baranov and R. J. Barlow and S. Barsuk and William Barter and Matteo Bartolini and F. Baryshnikov and J. M. Basels and G. Bassi and Varvara Batozskaya and Baasansuren Batsukh and Alexander Battig and Anders Bay and M. Becker and Franco Bedeschi and Ignacio Bediaga and Andrew Beiter and L. J. Bel and Vladimir Belavin and S. Belin and Violaine Bellee and Konstantin Belous and I. Belyaev and Giovanni Bencivenni and Eric Benhaim and Sean Benson and S. Beranek and Alexander Berezhnoy and R. Bernet and D. Berninghoff and Hans C. Bernstein and Claudia Bertella and Emilie Bertholet and A. Bertolin and Christopher Betancourt and Federico Betti and M. O. Bettler and Ia. Bezshyiko and Srishti Bhasin and Jihyun Bhom and M. S. Bieker and Simone Bifani and Pierre Billoir and Andrea Bizzeti and Mikkel Bj{\o}rn and M. P. Blago and Thomas Blake and Fr'ed'eric Blanc and Steven Blusk and Dana Bobulska and Valerio Bocci and Octavio Garcia and Thomas Boettcher and A. Boldyrev and Alexander Bondar and N. Bondar and Silvia Borghi and Maxim Borisyak and M. Borsato and Jozef Tomasz Borsuk and T. J. V. Bowcock and C. Bozzi and Michael J. Bradley and Svende Braun and Alexandre Brea Rodriguez and Michael Brodski and Jolanta Brodzicka and A. Brossa Gonzalo and Davide Brundu and Emma Buchanan and A. Buchler-Germann and Annarita Buonaura and C. Burr and Albert Bursche and Adol'f. Veniaminovich Butkevich and Julia Butter and Jean Buytaert and Wiktor Byczynski and Sandro Cadeddu and Heshan Cai and R. Calabrese and Liliet Calero Diaz and Stefano Cali and Ryan Calladine and M. Calvi and M{\'i}riam Calvo G{\'o}mez and P C Magalh{\~a}es and Alessandro Camboni and Pierluigi Campana and D. H. Campora Perez and A. F. Campoverde Quezada and Lorenzo Capriotti and A. Carbone and Giovanni Carboni and Roberta Cardinale and Alessandro Cardini and Ina Carli and Pierre Carniti and K. Carvalho Akiba and Adrian Vidal and G. Casse and Marco Cattaneo and G Cavallero and S. Celani and Riccardo Cenci and Jacopo Cerasoli and M. G. Chapman and M. J. Charles and Ph. Charpentier and Georgios Chatzikonstantinidis and Maximilien Chefdeville and Viktoriia Chekalina and C. Chen and S. Chen and A. Chernov and S.-G. Chitic and V. Chobanova and S. Cholak and Marcin Jakub Chrzaszcz and Alexsei Chubykin and Paolo Ciambrone and Maria Flavia Cicala and X. Cid Vidal and Gregory Max Ciezarek and Federico Cindolo and P. E. L. Clarke and Marco Clemencic and Harry Cliff and Joel Closier and John Leslie Cobbledick and Victor Coco and J. A. B. Coelho and Julien Cogan and Eric Cogneras and Luminiţa Cojocariu and Pieter Collins and Tommaso Colombo and Albert Comerma-Montells and Andrea Contu and Naomi Cooke and G. Coombs and Samuel Coquereau and Gloria Corti and C. M. Costa Sobral and Benjamin Couturier and Daniel Charles Craik and Jana Crkovská and A. Crocombe and M. Cruz Torres and Robert T. Currie and Christine Da Silva and Elena Dall’Occo and Jeremy Dalseno and Claudia D'Ambrosio and A. A. Danilina and P. d’Argent and Adam Davis and Oscar De Aguiar Francisco and K. De Bruyn and Stefano De Capua and Michel De Cian and J. M. De Miranda and Leandro De Paula and M. De Serio and P. De Simone and J. A. de Vries and C. T. Dean and William Dean and Daniel Decamp and Luigi Del Buono and B. Delaney and H. Dembinski and Adam Mateusz Dendek and Viktoriya Denysenko and Denis Derkach and Olivier Deschamps and Fabrice Desse and Francesco Dettori and Bashab Dey and A. Di Canto and P. di Nezza and S. М. Didenko and H. G. Six Dijkstra and V. Dobishuk and Francesca Dordei and Massimo Dorigo and A. C. dos Reis and L. Douglas and Anatoliy Dovbnya and K. Dreimanis and Maciej Wojciech Dudek and Laurent Dufour and Giulio Dujany and Paolo Durante and J. M. Durham and Deepanwita Dutta and Michal Dziewiecki and Agnieszka Dziurda and A. S. Dzyuba and Sajan Easo and Ulrik Egede and Victor Egorychev and Semen Eidelman and Sara Eisenhardt and Robert Jan Ekelhof and Semih Ekin and Lars Eklund and S. Ely and Alexandru Catalin Ene and Eliane Epple and Stephan Escher and Sevda Esen and Tecwyn Evans and Antonio Falabella and J. Z. Fan and Naomi Farley and S. Farry and Davide Fazzini and P. A. Fedin and Mauricio F{\'e}o and Placido Fernandez Declara and A. Fernandez Prieto and F. Ferrari and L. Ferreira Lopes and F. Ferreira Rodrigues and Silvia Ferreres Sole and Martina Ferrillo and Massimiliano Ferro-Luzzi and Sergey P. Filippov and R. A. Fini and Massimiliano Fiorini and Miroslaw Firlej and K. M. Fischer and C. Fitzpatrick and Tomasz Fiutowski and Frederic Fleuret and M. Fontana and Flavio Fontanelli and Roger Forty and V. Franco Lima and Manuel Franco Sevilla and M. Frank and Christopher M. Frei and David Anthony Friday and J. Fu and Q. Fuehring and Wolfgang Funk and E. Gabriel and A. Gallas Torreira and Dina Galli and Stefano Gallorini and Silvia Gambetta and Yuyue Gan and Miriam Gandelman and Piero Gandini and Yan Gao and L. M. Garcia Martin and Juli{\'a}n Garc{\'i}a Pardi{\~n}as and B. Garcia Plana and Felipe Andres Garcia Rosales and Ll. Garrido and David Gascon and C. Gaspar and David Gerick and Evelina Mihova Gersabeck and Marco Gersabeck and Timothy Gershon and Dawid Gerstel and Ph. Ghez and Val Gibson and Alessandra Giovent{\`u} and O. G. Girard and P. Gironella Gironell and L. E. Giubega and C. Giugliano and Konstantin Gizdov and V. V. Gligorov and Carla Gobel and Dmitry Golubkov and A. I. Golutvin and Alvaro Gomes and P. Gorbounov and Igor Vladimirovich Gorelov and Claudio Gotti and E. Govorkova and J. P. Grabowski and Ricardo Diaz and Thomas Grammatico and L. A. Granado Cardoso and Eugeni Grauges and Elena Graverini and Giacomo Graziani and Alexandru Grecu and R. Greim and P. Griffith and Lucia Grillo and Leonardo Gruber and B. R. Gruberg Cazon and Chad Gu and E. Gushchin and A. Guth and Yu. Guz and Thierry Gys and P. A. Gunther and T. Hadavizadeh and Guido Haefeli and Christophe Haen and Sophie Haines and P. M. Hamilton and Qundong Han and Xizhi Han and Tine C. Hansen Hancock and Stephanie Hansmann-Menzemer and Neville Harnew and Thomas Harrison and Robert D. Hart and C. Hasse and Mark Hatch and Jin-chuan He and Malte Hecker and Kevin Heijhoff and Kevin Heinicke and Arthur Hennequin and Karol Hennessy and L Kelly Henry and Johannes Heuel and Adl{\`e}ne Hicheur and D. Hill and Martha Hilton and P. H. Hopchev and Jiangqiao Hu 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 M. Idzik and P. Ilten and Alexander Inglessi and Kuzma Ivshin and R. Jacobsson and Sune Jakobsen and Eugene Jans and B. K. Jashal and Abolhassan Jawahery and Vukan Jevtic and Fangming Jiang and Malcolm John and D. Johnson and C. R. Jones and Britta Jost and Nathan Philip Jurik and S. S. Kandybei and Matthias Karacson and Joseph Kariuki and Nikita Kazeev and Matthieu Kecke and Frank Keizer and M. Kelsey and Matthew William Kenzie and T. Ketel and Basem Khanji and Anastasiia Kharisova and K. E. Kim and T. Kirn and V. S. Kirsebom and S. Klaver and K. Klimaszewski and Serhii Koliiev and Almagul Kondybayeva and Anatoly Konoplyannikov and P. Kopciewicz and Renata Kope{\vc}n{\'a} and P. Koppenburg and Maxim Korolev and I. Kostiuk and Oleksander Kot and S. Kotriakhova and L. N. Kravchuk and Rafal Dominik Krawczyk and Michal Kreps and F. Kress and Sophie Katharina Kretzschmar and P. Krokovny and Wojciech Krupa and Wendy Susan Krzemien and Wojciech Kucewicz and M. Kucharczyk and V. Kudryavtsev and Hilbrand Steffen Kuindersma and G. J. Kunde and Tengiz Kvaratskheliya and Daniel Lacarrere and George Lafferty and Alessandro Lai and Davide Lancierini and John Jake Lane and Gaia Lanfranchi and Ch. Langenbruch and O. Lantwin and Te Latham and Federico Lazzari and Cristina Lazzeroni and Renaud Le Gac and R. L. R. Lefevre and Alexander Leflat and Olivier Leroy and Tadeusz Lesiak and Blake Leverington and H. Li and Lianzhong Li and Xue-qian Li and Y. Y. Li and Zhongping Li and Xunyu Liang and Rolf Lindner and Vitalii Lisovskyi and Gao-fu Liu and Xiao Liu and David Loh and Angelo Loi and Julian Lomba Castro and Ian Dennis Longstaff and J. H. Lopes and Guillermo Loustau and G. H. Lovell and Y. Lu and D. L. Lucchesi and Miriam Lucio Mart{\'i}nez and Y. Luo and Anna Lupato and Eleonora Luppi and Oliver Lupton and Anie Lusiani and Xuanqi Lyu and Serena Maccolini and Fr{\'e}d{\'e}ric Machefert and Florin Maciuc and Vladimir Macko and P. Ma{\'c}kowiak and Samuel Maddrell-Mander and Lakshan Ram Madhan Mohan and O. E. Maev and Artem Maevskiy and Dmitrii Maisuzenko and M. W. Majewski and Sneha Malde and Bartosz Piotr Malecki and Andrey Malinin and Timofei Maltsev and Hanna Malygina and G. Manca and G. Mancinelli and Rafel Manera Escalero and Daniele Manuzzi and Daniele Marangotto and J. Maratas and J. F. Marchand and Umberto Marconi and S. Mariani and C. Marin Benito and Matthieu Marinangeli and Piero Marino and Joerg Marks and Philip J. Marshall and Giuseppe Martellotti and Loris Martinazzoli and M. Martinelli and D. Martinez Santos and F. Martinez Vidal and Andr{\'e} Massafferri and Marcel Materok and R. Matev and Abhijit Mathad and Z. Mathe and Viacheslav Matiunin and Clara Matteuzzi and Kara Renee Mattioli and Andrea Mauri and E. Maurice and M. McCann and Lucas Mcconnell and A. Mcnab and Ronan McNulty and Joseph Mead and Brian Meadows and C{\'e}dric M{\'e}aux and Gerwin Meier and Nis Meinert and Dmytro Melnychuk and Simone Meloni and M. Merk and Antonella Merli and Mikhail Mikhasenko and D. A. Milanes and Eric Millard and M. -N. Minard and Oleg Mineev and Luca Minzoni and Sara Elizabeth Mitchell and Biljana Mitreska and D. S. Mitzel and A. Modden and Andrea Mogini and R. D. 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Voropaev and Rolf Waldi and J. Walsh and Jinli Wang and M. Wang and Y. Wang and Z. Wang and D. R. Ward and H. M. Wark and N. K. Watson and D. Websdale and A. Weiden and Constantin Weisser and B. D. C. Westhenry and Dylan James White and Mark James Whitehead and D. Wiedner and George Wilkinson and M. Wilkinson and Ifan Williams and M. P. Williams and T. Williams and F. F. Wilson and Wojciech Wislicki and M. Witek and L. Witola and Guy Wormser and S. A. Wotton and H. Wu and Katrina Wyllie and Zhu Xiang and Dongyuan Xiao and Y. Xie and H. Xing and Ao Xu and Jiafa Xu and L. Xu and M. Xu and Q. Xu and Z. Xu and Z. Yang and Y. Yao and L. E. Yeomans and Hongmei Yin and Jia-ming Yu and X. Yuan and Oleg Yushchenko and K. A. Zarebski and Mikhail Zavertyaev and Milosz Zdybal and M. Zeng and Dongqin Zhang and Ls Zhang and Shuili Zhang and W. Chen X.-Y. Zhang and Yanfeng Zhang and Alexey Zhelezov and Yi-qiong Zheng and X. K. Zhou and Yu-yuan Zhou and Xiaoyu Zhu and V. Zhukov and J. B. Zonneveld and Stefano Zucchelli},
A new baryon state is observed in the $\Lambda_b^0\pi^+\pi^-$ mass spectrum with high significance using a data sample of $pp$ collisions, collected with the LHCb detector at centre-of-mass energies $\sqrt{s}=7, 8$ and 13TeV, corresponding to an integrated luminosity of 9fb$^{-1}$. The mass and natural width of the new state are measured to be \begin{eqnarray*} m & = & 6072.3 \pm 2.9 \pm 0.6 \pm 0.2 MeV\,, \Gamma & = & 72 \pm 11 \pm 2 MeV\,, \end{eqnarray*} where the first uncertainty is… CONTINUE READING

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Observation of New Resonances in the Λ_{b}^{0}π^{+}π^{-} System.


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