1. Evidence of a J/ψΛ structure and observation of excited Ξ- states in the Ξb-→J/ψΛK- decay
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Sergey Legotin, Thomas Peter Jones, Andrea Lampis, Monica Pepe Altarelli, Sergii Kandybei, Eric Cogneras, Alexander Malinin, Mikhail Korolev, Naomi Cooke, Ross John Hunter, Eric van Herwijnen, Dmitry Golubkov, V. Matiunin, Mika Vesterinen, Z. Li, Stephane T'Jampens, S. Filippov, Stephanie Hansmann-Menzemer, Giacomo Graziani, J. A. B. Coelho, Lavinia-Helena Giubega, E. Golobardes, P. J. Marshall, D. Xiao, N. Polukhina, Placido Fernandez Declara, L. Minzoni, Ricardo Vazquez Gomez, David Anthony Friday, Harris Conan Bernstein, Cesar Luiz Da Silva, Jakob Haimberger, Halime Sazak, Vladimir Shevchenko, Maarten van Veghel, Irina Nasteva, George Coombs, Rosen Matev, Suzanne Klaver, Alexandre Boyer, Pablo Baladron Rodriguez, Abraham Gallas Torreira, Elisabeth Maria Niel, Sonia Amina Bouchiba, N. S. Nolte, V. Macko, J. Buytaert, Xianglei Zhu, Ilia Belov, Andreas Schopper, Melissa Maria Cruz Torres, T. Nanut, C. Bozzi, H. Viemann, Aleksandr Petrov, Antonio Falabella, Davide Zuliani, H. Stevens, Jonas Rademacker, Bo Fang, Kristof De Bruyn, F. Ferreira Rodrigues, S. Kotriakhova, Yuehong Xie, Anastasia Smetkina, Peilian Li, Maximo Plo Casasus, John Jake Lane, J. Wang, Marek Jezabek, Giovanni Passaleva, Thi Thuy Hang Pham, Di Yang, Eddy Jans, Roger Barlow, Cheryl Pappenheimer, Lais Soares Lavra, I. A. Monroy, Federico Stagni, Wojciech Kucewicz, S. Jakobsen, Jozef Tomasz Borsuk, Agnieszka Dziurda, Ricardo Graciani Diaz, Yury Guz, Regis Lefèvre, Lucian Cojocariu, Mark Smith, M. Soares, M. Hatch, S. Kretzschmar, Stephen M. Stahl, John Back, M. D. Sokoloff, Simone Bifani, Mark Whitehead, Lucas Mcconnell, Semen Eidelman, A. Usachov, Silvia Borghi, Pavel Krokovny, Mario Edgardo Olivares, Rui Wang, Christopher James Pawley, Lukas Calefice, A. Inglessi, Jose Maria Fernandez-tenllado Arribas, Aleksei Chernov, Davide Fazzini, Stephen Wotton, B. Delaney, S. Meloni, Zakariya Aliouche, M. S. Bieker, G. Morello, Richard Jacobsson, Marta Calvi, Giulia Manca, R. D. Moise, C. Hasse, Ekaterina Trifonova, W. Parker, Valerie Gibson, Patrizia De Simone, Shuaiyi Liu, Marie-Noelle Minard, Clara Gaspar, Massimiliano Fiorini, Miriam Calvo Gomez, Carla Marin Benito, Evgeny Gushchin, Ilaria Neri, Oliver Lupton, W. Huang, Stefano De Capua, Nigel Watson, Alexey Zhelezov, Elena Graverini, B.R. Gruberg Cazon, Amanda May Donohoe, Valeriia Lukashenko, Jean François Marchand, Boleslaw Pietrzyk, Anna Lupato, Carlos Abellán Beteta, Konstantin Belous, Marco Poli Lener, B. Spaan, Daniel Patrick O'Hanlon, Giacomo Vitali, Marco Santimaria, Daniel Decamp, Jairo Alexis Rodriguez Lopez, S. Ponce, Lucio Anderlini, Oscar De Aguiar Francisco, U. Marconi, C. Weisser, S. Tolk, Valery Zhukov, Konrad Klimaszewski, Eliane Epple, Louis Lenard Gerken, S. Ek-In, Adriano Lai, A. Guth, Yutong Li, G. Liu, Miriam Gandelman, S. Monteil, Frederic Teubert, Christopher Burr, Dario de Simone, Michael Schmelling, Paul Andre Günther, J. B. Zonneveld, R. Calabrese, Oleg Stenyakin, A. Szabelski, Anna Danilina, Jakub Ryzka, Timothy Evans, George Lafferty, Marcelo Soares, Patrick Koppenburg, Artur Ukleja, Jose Lopes, Jakub Moron, X. Lyu, Carmen Giugliano, A. Maevskiy, Paolo Gandini, Marcello Rotondo, D. Zhang, Manuel Schiller, Marcos Romero Lamas, S. Schulte, P. Ibis, W. Krupa, S. Cadeddu, Lei Zhang, Simon Stemmle, Katharina Müller, P. Stefko, Philipp Roloff, Pere Gironella Gironell, J. S. Butter, M. Marinangeli, Michael Williams, Tatiana Gaintseva, Lorena Dieste Maronas, I. Williams, Anton Philippov, O. Schneider, Rudolf Oldeman, Roman Litvinov, Roel Aaij, Vadym Denysenko, Vasily Kudryavtsev, C. H. Murphy, Christopher Parkes, N. I. Voropaev, Jialu Wang, Felipe Luan Souza De Almeida, P. Spradlin, Francesca Dordei, A. Carbone, Jan Maratas, Jakub Jacek Malczewski, C. Gu, S. Bhasin, A. Camboni, O. Kot, Yipeng Sun, Iaroslava Bezshyiko, Ivan Shchemerov, Edoardo Franzoso, T. Ovsiannikova, Arnaud Robert, Thomas Latham, C. Patrignani, I. Carli, Julian Alexander Boelhauve, P. Collins, F. Pisani, F. Ferrari, K. R. Mattioli, V. Belavin, Murdo Traill, Alessandro Bertolin, D. Gerick, M. W. Slater, Sevda Esen, Ulrik Egede, L. Sun, Andrey Ustyuzhanin, T. Maltsev, Sajan Easo, Bernardo Adeva, Cibran Santamarina Rios, A. Dendek, Svende Braun, Diego Martinez Santos, Alessandro Petrolini, G. J. Kunde, S. Zhang, Danila Saranin, J. G. Smeaton, Marco Adinolfi, Adlène Hicheur, Benedict Donald C Westhenry, Stefania Ricciardi, Jifeng Hu, A. Merli, V. Tisserand, P. Gorbounov, T. Pajero, Karol Hennessy, Nikolay Nikitin, Marie Bachmayer, Alexandru Grecu, Thomas Ackernley, Marco Pappagallo, F. Redi, J. Hu, H. Li, K. Rinnert, Francesco Dettori, Adam Benjamin Morris, Jacopo Cerasoli, Gary Robertson, Sergey Gromov, Adam Davis, V. Pugatch, M. Hilton, Miguel Ramos Pernas, M. Féo, C. A. Aidala, Gaia Lanfranchi, Lex Marinus Greeven, Bhagyashree Pagare, Guy Wilkinson, Louis Henry, R. Calladine, Hilbrand Steffen Kuindersma, Marianna Fontana, C. M. Costa Sobral, D. Brundu, Niels Tuning, L. E. Yeomans, Luciano Pappalardo, D. Lancierini, M. Mulder, H. Cai, Paul Seyfert, C. Chen, Stefan Schael, Olivier Leroy, Yilong Wang, A. Venkateswaran, Arthur Marius Hennequin, Alessio Piucci, E. Santovetti, Yasmine Amhis, M. Atzeni, E. Grauges, Conor Fitzpatrick, Maxim Borisyak, Philippe d'Argent, X. Liang, Nuria Valls Canudas, A. Vorobyev, Dorothea Vom Bruch, Huanhuan Liu, Kristian Alexander Zarebski, Mariusz Witek, Mark Tobin, Michael Alexander, Renato Quagliani, Dmitrii Ilin, Q. Xu, Yongsheng Gao, Yanting Fan, Aleksei Andreianov, Harry Cliff, Wander Baldini, Victor Renaudin, Iain Longstaff, Anthony Gavin Downes, Julien Cogan, Bruno Souza De Paula, Jing Wang, Kenenbek Arzymatov, Adrian Casais Vidal, Dmitry Popov, G. Cavallero, Simon Akar, Matteo Giovannetti, V. Romanovskiy, Philippe Charpentier, Tomasz Fiutowski, Patrick Robbe, Robert Currie, Federico Alessio, Minh Tâm Tran, Christoph Frei, B. Quintana, Rainer Schwemmer, Pietro Marino, M. S. Rangel, Joel Closier, Matthew Birch, Kayleigh Anne Thomson, G. Panshin, Daniele Manuzzi, H. Malygina, J. L. Cobbledick, Abbie Jane Chadwick, B. Audurier, E. Maurice, T. Lesiak, F. Fleuret, I. Kostiuk, T. Mombächer, A. Bay, Sandra Amato, J. D. Roth, P. Campana, Victor Egorychev, Mikhail Shapkin, U. Uwer, Jinlin Fu, Jolanta Brodzicka, Biljana Mitreska, Alexey Dzyuba, K. Heijhoff, Y. Zhang, Yang Li, J. Qin, Gerwin Meier, Alex Pearce, Serena Maccolini, Jörg Marks, C. A. Chavez Barajas, Maria Vieites Diaz, Andrea Contu, A. Rollings, Xiaokang Zhou, Viacheslav Duk, Clara Remon Alepuz, Marcin Chrzaszcz, J. Plews, A. Ossowska, Liliana Congedo, Antonio Romero Vidal, Pascal Perret, G. Tuci, Abhijit Mathad, Z. Ren, A. Loi, Tomasz Skwarnicki, Sebastian Bachmann, Andrew George Morris, Polina Kravchenko, Thomas Ruf, A. Xu, M. Poliakova, Antonio Fernandez Prieto, Ivan Belyaev, Jan-Marc Basels, A. Artamonov, F. Reiss, Alexey Boldyrev, Artem Ryzhikov, Franz Muheim, G. H. Lovell, H. Dijkstra, M. Martinelli, Mark Richard James Williams, Flavio Fontanelli, Mikhail Zavertyaev, G. Raven, Alexander Bondar, Miroslaw Firlej, E. Shmanin, A. Kondybayeva, Juan Martin Otalora Goicochea, Laurent Dufour, V. Coco, Wouter Hulsbergen, Shuangli Yang, Zhihong Shen, Niladribihari Sahoo, Roger Forty, Frederic Machefert, Sheldon Stone, Domenico Galli, Lingzhu Bian, N. Serra, Darya Savrina, Paras Naik, Zoltan Mathe, Xiaoxue Han, Pablo Vazquez Regueiro, Nicola Neri, P. Ciambrone, Alison Tully, Michal Kreps, S. Poslavskii, G. Alkhazov, C. Meaux, Wojciech Wislicki, Mikhail Hushchyn, Sergey Strokov, Marco Guarise, V. Chobanova, C. Betancourt, Federico Lazzari, D. Murray, Marie Helene Schune, Q. Han, Paolo Carniti, E. Govorkova, M. Xu, Clara Matteuzzi, Quentin Fuehring, J. V. Mead, P. Mackowiak, Claire Prouve, Neville Harnew, Robbert Erik Geertsema, Eduard Ursov, Evelina Gersabeck, Barbara Passalacqua, Stefania Vecchi, Edward Brendan Shields, Angel Fernando Campoverde Quezada, Nicola Skidmore, Leonid Kravchuk, Maik Becker, Ettore Zaffaroni, Vasyl Dobishuk, Themistocles Bowcock, Gabriele Simi, Lukas Witola, Alberto Lusiani, A. Kharisova, Preema Rennee Pais, Biplab Dey, Lino Ferreira Lopes, Joan Ruiz Vidal, Miriam Lucio Martinez, N. Meinert, J. J. Walsh, Xuhao Yuan, D. Hynds, Francesco Polci, Michal Kazimierz Mazurek, M. Brodski, Z. Yang, Antonio Pellegrino, Kazuyoshi Carvalho Akiba, Matteo Rama, E. Dall'Occo, Sara Elizabeth Mitchell, Jan Langer, Eduardo Rodrigues, Michal Dziewiecki, Ana Barbara Rodrigues, Paula Garcia Moreno, Manuel Franco Sevilla, M. McCann, R. Kopecna, D. Gerstel, F. Keizer, A. Gomes, Federico Betti, P. Billoir, Yu Zhang, Maria Aranzazu Oyanguren, Sergio Gomez Fernandez, Jussara De Miranda, Phoebe Meredith Hamilton, G. Wormser, Vladimir Chulikov, Alexander Berezhnoy, Lakshan Ram Madhan Mohan, V. Obraztsov, Yue Pan, J. Heuel, J. Bhom, T. H. Hancock, V. Balagura, Denis Derkach, Erica Polycarpo, Rafael Silva Coutinho, Resmi Pk, M. Szymanski, Peter Griffith, Fergus Wilson, Elie Aslanides, Maciej Wojciech Dudek, Eric Thomas, S. Eisenhardt, Burkhard Schmidt, A. Chubykin, Adalberto Sciubba, Mitesh Patel, J. M. Durham, S. Nieswand, G. J. Pomery, Tatsuya Nakada, Olaf Steinkamp, G. Chatzikonstantinidis, Sergei Popov, C. D'Ambrosio, M. W. Majewski, M. Zeng, Yangheng Zheng, G. Bencivenni, M. S. Rudolph, Arnau Brossa Gonzalo, M. Schellenberg, Paula Alvarez Cartelle, T. Kirn, D. Wiedner, Sook Hyun Lee, Marco Clemencic, L. Martinazzoli, Daniel Charles Craik, Anatoliy Dovbnya, Artur Ishteev, Cameron Thomas Dean, M. Gersabeck, A. Vagner, F. Baryshnikov, Maria Flavia Cicala, K. Heinicke, D. Bobulska, Benjamin Couturier, Mateusz Goncerz, Alberto dos Reis, Milosz Zdybal, G. Pietrzyk, Stephen Farry, S. Escher, Michel De Cian, V. S. Kirsebom, Silvia Ferreres Sole, Antonios Papanestis, Alessandro Cardini, Maarten Van Dijk, Jibo He, H. M. Wark, Paul Nathaniel Swallow, Silvia Gambetta, Timothy Gershon, Youen Kang, S. Blusk, Daniel Vieira, Saverio Mariani, Vukan Jevtic, Tara Shears, Vitaly Vorobyev, Basem Khanji, D. Marangotto, Thomas Blake, Chishuai Wang, Marek Idzik, Lars Eklund, M. Materok, Anton Poluektov, Lorenzo Sestini, Achim Vollhardt, M. G. Chapman, Rafel Manera Escalero, Leon David Carus, Ziad Ajaltouni, Dominik Stefan Mitzel, Barbara Sciascia, Liliet Calero Diaz, Guillermo Loustau, Thomas Hadavizadeh, Raymond Mountain, Markus Frank, Donal Hill, Scott Ely, Beatriz Garcia Plana, Gianluca Zunica, Alexander Leflat, Chung Nguyen-Mau, Karlis Dreimanis, Sophie Elizabeth Hollitt, Raja Nandakumar, Claudio Gotti, S. Aiola, Oscar Boente Garcia, Sebastian Neubert, Hossein Afsharnia, Dominik Müller, Daniel Lacarrere, Julian Lomba Castro, P. E. L. Clarke, David Websdale, Giulia Frau, Lishuang Ma, F. Archilli, Alexander Semennikov, W. Hu, Thomas Grammatico, S. Koliiev, Peter Svihra, S. Simone, Gregory Ciezarek, M. Veronesi, E. Gabriel, J. Sun, A. Beiter, Olivier Deschamps, Lei Li, Laura Promberger, Luis Alberto Granado Cardoso, Cynthia Nunez, Vinicius Franco Lima, Sergei Kholodenko, A. Konoplyannikov, Giuseppe Martellotti, B. Malecki, Wojciech Krzemien, Alessio Sarti, Thierry Gys, Alexandre Brea Rodriguez, Jeremy Dalseno, Oleksandr Zenaiev, Eleonora Luppi, Albert Bursche, L. Douglas, Donatella Lucchesi, Marilisa De Serio, Liupan An, M. E. Stramaglia, S. Maddrell-Mander, Petr Fedin, B. Batsukh, M. Bjørn, Carla Göbel, S. Cali, Sneha Malde, William Barter, Andrey Golutvin, F. Blanc, Jaap Velthuis, I. V. Gorelov, Giovanni Bassi, Lucas Meyer Garcia, T. Harrison, Yu Lu, K. Wyllie, Mikhail Mikhasenko, Andrea Bizzeti, Youhua Yang, Vincenzo Vagnoni, Giovanni Carboni, Mauro Piccini, A. Valassi, Piera Muzzetto, Luke George Scantlebury Smead, Jonas Nathanael Eschle, Guido Haefeli, Z. Xiang, Zhenzi Wang, Xabier Cid Vidal, Dylan Jaide White, Michela Garau, Marko Milovanovic, Christopher Jones, Naylya Sagidova, A. Alfonso Albero, B. Rachwal, Claudia Bertella, E. Ben-Haim, M. P. Blago, Kamil Leszek Fischer, Aleksandra Snoch, M. Wang, Paolo Durante, Maitreyee Mukherjee, Luis Miguel Garcia Martin, Ignacio Bediaga, Desmond Mzamo Shangase, Kyung Eun Kim, Martino Borsato, Lev Shekhtman, Carina Trippl, Lucia Grillo, Aleksandr Solovev, Xuesong Liu, Tabitha Halewood-leagas, J. P. Grabowski, Jingzhou Fan, H. Mu, Nikolay Bondar, Roland Bernet, Paul Soler, Marcel Merk, Massimiliano Ferro-Luzzi, Fidan Suljik, Sara Celani, Leandro De Paula, Tjeerd Ketel, Niko Neufeld, V. Placinta, Juan Mauricio, N. V. Raab, Emilie Bertholet, S. Petrucci, S. Zucchelli, Evangelos Leonidas Gkougkousis, Y. Yao, Zhihao Xu, Tengiz Kvaratskheliya, Cristina Sanchez Gras, Daniel Johnson, A. Gioventù, Tamaki Holly Mcgrath, D. Melnychuk, P. Kopciewicz, K. Petridis, Beat Jost, Marco Cattaneo, Agnieszka Oblakowska-Mucha, F. Kress, Stefan-Gabriel Chitic, Joseph David Shupperd, Felipe Andres Garcia Rosales, André Massafferri, A. Mauri, Oleg Maev, Luigi Del Buono, L. Xu, Martina Ferrillo, Matthew Needham, Carlos Vázquez Sierra, Giovanni Punzi, R. Newcombe, A. Battig, L. Shchutska, Eluned Smith, D. Pereima, A. Mödden, Ronan McNulty, Shantam Taneja, Matthew Kenzie, Zehua Xu, Daria Strekalina, Fionn Caitlin Ros Bishop, Juan Baptista Leite, K. Prasanth, Juan Jose Saborido Silva, Celestina Satriano, A. Seuthe, Thi Dung Nguyen, Krzysztof Swientek, Matthew James Tilley, Xavier Vilasis-Cardona, Nathanael Farley, F. Jiang, Tai-Hua Lin, Marina Artuso, Olga Madejczyk, D. Maisuzenko, Simone Capelli, Y. Luo, Ouail Kitouni, Johannes Albrecht, Malcolm John, Brian Meadows, Sophie Baker, F. Bedeschi, Roberta Cardinale, Roberta Santacesaria, Charlotte Barbara Van Hulse, I. Polyakov, Matthias Karacson, Xiaotao Huang, Elisabetta Spadaro Norella, Mark Wilkinson, Roland Waldi, B. G. Siddi, Oleg Yushchenko, Heinrich Schindler, Matthew Charles, Maksim Karpov, M. J. Bradley, Nathan Jurik, Zishuo Yang, Jianqiao Wang, Julián García Pardiñas, Biagio Saitta, H. Yin, Stanislav Luchuk, Mihai Straticiuc, S. Didenko, Gerco Onderwater, Christoph Langenbruch, Gianluigi Casse, D. Dutta, K. Ivshin, Daniel Joachim Unverzagt, W. Byczynski, Sara Sellam, Diego Alejandro Milanes, M. Andreotti, Sergey Barsuk, Ruiting Ma, T. Colombo, Oliver Lantwin, K. Gizdov, A. Sergi, G. Sarpis, Richard Lane, William Dean, Serhii Cholak, Andrew McNab, Pasquale Di Nezza, Giovanni Valenti, Davide Pinci, Patrick Owen, Michael Joseph Morello, Giampiero Mancinelli, M. Hecker, Vladimir Gligorov, M. Pili, Mauro Morandin, S. Belin, Philippe Ghez, W. Funk, Guanghua Gong, Hangyi Wu, Christopher John Parkinson, Lluis Garrido, Jennifer Clare Smallwood, Anatoly Butkevich, Minaugas Sarpis, Fernando Martinez Vidal, David Sanchez Gonzalo, Patricia Camargo Magalhaes, Michele Veltri, Alessia Satta, Sai-Juan Chen, Fedor Ratnikov, Marcin Kucharczyk, Florin Maciuc, Marco Petruzzo, Jacco de Vries, Maximilien Chefdeville, Luca Tomassetti, Marian Stahl, Jana Crkovská, A. Buonaura, F. Desse, Philip Ilten, Gloria Corti, V. Bellee, Rolf Lindner, Y. Gan, Stefano Perazzini, H.-P. Dembinski, Ivan Solovyev, Blake Leverington, D. Y. Tou, Fernanda Goncalves Abrantes, B. K. Jashal, V. Lisovskyi, Christophe Haen, Martinus van Beuzekom, E. Millard, Pascal Vincent, Lorenzo Capriotti, Nikita Kazeev, Jingyi Xu, Steffen Georg Weber, Rizwaan Adeeb Mohammed, A. Jawahery, Diego Torres Machado, H. Pullen, Renaud Le Gac, Jie Yu, Matteo Palutan, A. Pastore, Thomas Boettcher, M. Bartolini, R. A. Fini, Roberto Ribatti, A. Ene, Lorenzo Pica, A. Palano, Tomasz Szumlak, D. Berninghoff, Y. Zhou, M. Schubiger, Rafal Dominik Krawczyk, David Hutchcroft, R. I. Rabadan Trejo, Eva Vilella Figueras, M. Reboud, M. Saur, Igor Skiba, and Wenbin Qian
- Subjects
Physics ,Quantum chromodynamics ,Particle physics ,Multidisciplinary ,Strangeness ,010502 geochemistry & geophysics ,Quarkonium ,Lambda ,01 natural sciences ,Pentaquark ,Luminosity ,Excited state ,High Energy Physics::Experiment ,Invariant mass ,0105 earth and related environmental sciences - Abstract
First evidence of a structure in the $J/\psi{\Lambda}$ invariant mass distribution is obtained from an amplitude analysis of$\Xi_b^-{\rightarrow}J/\psi{\Lambda}K^-$ decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness with a significance of $3.1\sigma$ including systematic uncertainties and look-elsewhere effect. Its mass and width are determined to be $4458.8\pm2.9^{+4.7}_{-1.1}$ MeV and $17.3\pm6.5^{+8.0}_{-5.7}$ MeV, respectively, where the quoted uncertainties are statistical and systematic. The structure is also consistent with being due to two resonances. In addition, the narrow excited $\Xi^-$ states, $\Xi(1690)^-$ and $\Xi(1820)^-$, are seen for the first time in a $\Xi^-_b$ decay, and their masses and widths are measured with improved precision. The 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.
- Published
- 2021
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