Measurement of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the $\Lambda^0_b$ polarisation in $pp$ collisions

LHCb collaboration R. Aaij, Carlos Abellán Beteta,Thomas Ackernley,Bernardo Adeva, M. Adinolfi,Hossein Afsharnia, C. Aidala,Salvatore Aiola,Ziad Ajaltouni,S. Akar,Johannes Albrecht,Federico Alessio, Magazinov Alexander,A. Alfonso Albero, Georgy Alkhazov,P. Alvarez Cartelle, A. A. Alves,Sandra Amato,Yasmine Amhis, L. An,Lucio Anderlini, G. Andreassi, A. M. Andreianov, Mirco Andreotti,Flavio Archilli,A. Artamonov,Marina Artuso, Kenenbek Arzymatov,Elie Aslanides,Michele Atzeni,Benjamin Audurier,Sebastian Bachmann, J. J. Back, S. Baker,Vladislav Balagura,Wander Baldini, Julius C. B. Leite,R. J. Barlow, S. Barsuk,William Barter,Matteo Bartolini,F. Baryshnikov, J. M. Basels, G. Bassi,Varvara Batozskaya, Baasansuren Batsukh,Alexander Battig, Anders Bay, M. Becker,Franco Bedeschi,Ignacio Bediaga,Andrew Beiter,Vladimir Belavin,S. Belin,Violaine Bellee, Konstantin Belous, I. Belyaev, Giovanni Bencivenni,Eric Benhaim,Sean Benson,Alexander Berezhnoy, R. Bernet, D. Berninghoff, H. C. Bernstein,Claudia Bertella,Emilie Bertholet, A. Bertolin,Christopher Betancourt,Federico Betti, M. O. Bettler,Ia. Bezshyiko,Srishti Bhasin,Jihyun Bhom, M. S. Bieker,Simone Bifani,Pierre Billoir,Andrea Bizzeti,Mikkel Bjørn,M. P. Blago,Thomas Blake,F. Blanc, Steven Blusk, Dana Bobulska,Valerio Bocci, Octavio Garcia, Thomas Boettcher, A. Boldyrev,Alexander Bondar, N. Bondar,Silvia Borghi,Maxim Borisyak,M. Borsato, J. T. Borsuk,T. J. V. Bowcock, Adrien Boyer, C. Bozzi, M. J. Bradley,Svende Braun,Alexandre Brea Rodriguez,Michael Brodski, Jolanta Brodzicka,A. Brossa Gonzalo, Davide Brundu, Emma Buchanan, A. Buchler-Germann, Annarita Buonaura, C. Burr, Albert Bursche, Adol'f. Veniaminovich Butkevich,Julia Butter, Jean Buytaert, Wiktor Byczynski,Sandro Cadeddu, Heshan Cai,R. Calabrese, Liliet Calero Diaz, Stefano Cali, Ryan Calladine, M. Calvi, Míriam Calvo Gómez,P C Magalhães,Alessandro Camboni, P. Campana,D. H. Campora Perez, Angel Fernando Campoverde Quezada, Lorenzo Capriotti, A. Carbone, Giovanni Carboni,Roberta Cardinale, Alessandro Cardini, Ina Carli, Pierre Carniti,K. Carvalho Akiba,Adrian Vidal, G. Casse,Marco Cattaneo, G Cavallero, S. Celani, Riccardo Cenci, Jacopo Cerasoli, M. G. Chapman,M. J. Charles,Ph. Charpentier, Georgios Chatzikonstantinidis,Maximilien Chefdeville,Viktoriia Chekalina, C. Chen, S. Chen, A. G. Chernov,S.-G. Chitic, Veronika Chobanova, S. Cholak, Marcin Jakub Chrzaszcz, Alexsei Chubykin, V. Chulikov, Paolo Ciambrone, M. F. Cicala,X. Cid Vidal, Gregory Max Ciezarek,Federico Cindolo, P. E. L. Clarke, Marco Clemencic, H. V. Cliff, Joel Closier, J. L. Cobbledick, Victor Coco, J. A. B. Coelho, Julien Cogan, Eric Cogneras, Luminiţa Cojocariu, Pieter Collins, Tommaso Colombo, Andrea Contu, Naomi Cooke,G. Coombs, Samuel Coquereau, Gloria Corti,C. M. Costa Sobral, B. Couturier, Daniel Charles Craik, Jana Crkovská, A. Crocombe,M. Cruz Torres, Robert T. Currie, Christine Da Silva, Elena Dall’Occo, Jeremy Dalseno, Claudia D'Ambrosio, A. A. Danilina, P. d’Argent, Adam Davis, Oscar De Aguiar Francisco,K. De Bruyn, Stefano De Capua, Michel De Cian,J. M. De Miranda, Leandro De Paula,M. De Serio,P. De Simone,J. A. de Vries, C. T. Dean, William Dean, Daniel Decamp, Luigi Del Buono,B. Delaney, H. Dembinski, Adam Mateusz Dendek, Viktoriya Denysenko, Denis Derkach, Olivier Deschamps, Fabrice Desse,Francesco Dettori, Bashab Dey,A. Di Canto,P. di Nezza, S. М. Didenko, H. G. Six Dijkstra, V. Dobishuk, Francesca Dordei, Massimo Dorigo,A. C. dos Reis, L. Douglas, Anatoliy Dovbnya, K. Dreimanis, M. W. Dudek,Laurent Dufour, Paolo Durante, J. M. Durham, Deepanwita Dutta, Michal Dziewiecki, Agnieszka Dziurda,A. S. Dzyuba, Santhosh Easo, Ulrik Egede, Victor Egorychev,Semen Eidelman,Sara Eisenhardt,Semih Ekin,Lars Eklund, S. Ely, Alexandru Catalin Ene, Eliane Epple, Stephan Escher, Jonas Eschle, Sevda Esen, Tecwyn Evans, Antonio Falabella, J. Z. Fan, Yuewen Fan, Naomi Farley, Stephen Farry, Davide Fazzini, P. A. Fedin, Mauricio Féo, Placido Fernandez Declara,A. Fernandez Prieto,F. Ferrari,L. Ferreira Lopes,F. Ferreira Rodrigues, Silvia Ferreres Sole,Martina Ferrillo, Massimiliano Ferro-Luzzi, Sergey P. Filippov, R. A. Fini, Massimiliano Fiorini, Miroslaw Firlej, Karen M. Fischer,C. Fitzpatrick, Tomasz Fiutowski, Frederic Fleuret, M. Fontana, Flavio Fontanelli, Roger Forty,V. Franco Lima,Manuel Franco Sevilla, M. Frank, Christopher M. Frei, D. A. Friday, J. Fu, Q. Fuehring,Wolfgang Funk, E. Gabriel, T. Gaintseva,A. Gallas Torreira, Dina Galli, Stefano Gallorini,Silvia Gambetta,Yuyue Gan, Miriam Gandelman, Piero Gandini, Yan Gao,L. M. Garcia Martin, Julián García Pardiñas,B. Garcia Plana, Felipe Andres Garcia Rosales, Ll. Garrido, David Gascon, C. Gaspar, David Gerick, Evelina Mihova Gersabeck,Marco Gersabeck, Timothy Gershon, Dawid Gerstel,Ph. Ghez, Val Gibson, Alessandra Gioventù,P. Gironella Gironell, L. E. Giubega, Carmen Giugliano, Konstantin Gizdov, V. V. Gligorov, Carla Gobel,Elisabet Golobardes, Dmitry Golubkov, A. I. Golutvin, Alvaro Gomes, P. Gorbounov, I. V. Gorelov, Claudio Gotti,E. Govorkova,J. P. Grabowski, Ricardo Diaz, Thomas Grammatico,L. A. Granado Cardoso,Eugeni Grauges, Elena Graverini, Giacomo Graziani, Alexandru Grecu, R. Greim, P. Griffith, Lucia Grillo, Leonardo Gruber,B. R. Gruberg Cazon, Chad Gu, Marco Guarise, P. A. Gunther, E. Gushchin,A. Guth,Yu. Guz, Thierry Gys, T. Hadavizadeh, Guido Haefeli, C. Haen, Sophie Haines, P. M. Hamilton, Qundong Han,Xizhi Han,T. H. Hancock, Stephanie Hansmann-Menzemer, Neville Harnew,Thomas Harrison, Robert D. Hart,C. Hasse, Mark Hatch,Jin-chuan He, Malte Hecker, Kevin Heijhoff, Kevin Heinicke, A. M. Hennequin, Karol Hennessy, L Kelly Henry, Johannes Heuel, Adlène Hicheur, D. Hill, Martha Hilton, P. H. Hopchev,Jiangqiao Hu, P. H. Hopchev, W. Huang, Wouter Hulsbergen, Thibaud Humair, R. J. Hunter, Mikhail Hushchyn, David Hutchcroft, Daniel Hynds, Philipp Ibis, M. Idzik, P. Ilten, Alexander Inglessi, Kuzma Ivshin, R. Jacobsson,Sune Jakobsen, Eugene Jans, B. K. Jashal, Abolhassan Jawahery,Vukan Jevtic, Fangming Jiang,Malcolm John, D. R. Johnson, C. R. Jones, Britta Jost, Nathan Philip Jurik, S. S. Kandybei, Matthias Karacson, Joseph Kariuki,Nikita Kazeev, Matthieu Kecke, Frank Keizer, M. Kelsey, Matthew William Kenzie,T. Ketel, Basem Khanji, Anastasiia Kharisova,K. E. Kim,T. Kirn,V. S. Kirsebom,S. Klaver, K. Klimaszewski, Serhii Koliiev, Almagul Kondybayeva, Anatoly Konoplyannikov,P. Kopciewicz, Renata Kopečná, P. Koppenburg, Maxim Korolev,I. Kostiuk, Oleksander Kot,S. Kotriakhova, Pavel Kravchenko, L. N. Kravchuk, R. D. Krawczyk, Michal Kreps, F. Kress, Sophie Katharina Kretzschmar, Pavel Krokovny,Wojciech Krupa, Wendy Susan Krzemien,Wojciech Kucewicz, M. Kucharczyk, V. Kudryavtsev, H. S. Kuindersma, G. J. Kunde, Tengiz Kvaratskheliya, Daniel Lacarrere, George Lafferty,Alessandro Lai,Davide Lancierini,J. J. Lane, Gaia Lanfranchi, Ch. Langenbruch, O. Lantwin, T. E. Latham, Federico Lazzari, Renaud Le Gac, Su Houng Lee, R. L. R. Lefevre, Alexander Leflat, Olivier Leroy, Tadeusz Lesiak, Blake Leverington,H. Li, Lianzhong Li, X. Li,Y. Y. Li, Zhongping Li, Xunyu Liang, T Lin, Rolf Lindner, Vitalii Lisovskyi, Gao-fu Liu, Suyuan Liu, Xiao Liu, David Loh, Angelo Loi, Julian Lomba Castro, Ian Dennis Longstaff,J. H. Lopes, Guillermo Loustau, G. H. Lovell, Y. Lu, D. L. Lucchesi, Miriam Lucio Martínez, Y. Luo, Anna Lupato, Eleonora Luppi, Oliver Lupton, Anie Lusiani,Xuanqi Lyu, Serena Maccolini, Frédéric Machefert, Florin Maciuc, Vladimir Macko,P. Maćkowiak, Samuel Maddrell-Mander, Lakshan Ram Madhan Mohan, O. E. Maev, Artem Maevskiy, Dmitrii Maisuzenko, M. W. Majewski,Sneha Malde, Bartosz Piotr Malecki, Andrey Malinin, Timofei Maltsev, Hanna Malygina, G. Manca, Giampiero Mancinelli, Rafel Manera Escalero, Daniele Manuzzi, Daniele Marangotto, J. Maratas, J. F. Marchand, U. Marconi, Saverio Mariani,C. 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Romanovskiy, Marcos Romero Lamas,A. Romero Vidal,J. D. Roth, M. Rotondo, M. S. Rudolph, T. Ruf, Joan Ruiz Vidal, Artem Ryzhikov, Jakub Ryzka, Jorge Silva, Naylya Sagidova, Niranjan Sahoo, Biagio Saitta, C. Sanchez Gras, Carlos Sánchez Mayordomo, Roberta Santacesaria, Cristina Rios, Marco Santimaria, Emanuele Santovetti, Gediminas Sarpis, M. Sarpis, Alessio Sarti, Celestina Satriano, Alessia Satta, Miroslav Saur, D. Savrina, Luke George Scantlebury Smead, Stefan Schael, Margarete Schellenberg, Martin Schiller, Heinrich Schindler, Michael Schmelling, Timon Schmelzer,Brian P. Schmidt,Olivier Schneider, Andreas Schopper, H. F. Schreiner, M. Schubiger, Sebastian Schulte, M. H. Schune,Rainer Schwemmer, B. Sciascia, Adalberto Sciubba, Sara Sellam, A. Semennikov,Anthony Sergi,Nicola Serra, J. Serrano, Lorenzo Sestini, Alex Seuthe, Paul Seyfert, D. M. Shangase, Mikhail Shapkin, Lesya Mykhaylivna Shchutska, Tara Shears, Lev Shekhtman,V. Shevchenko, Evgenii Shmanin, J. D. Shupperd, B. G. Siddi,R. Silva Coutinho,L. de Silva Oliveira, Gabriele Simi, S. Simone, Igor Skiba,Nicola Skidmore,Tomasz Skwarnicki, M. W. Slater,J. G. Smeaton, A. Smetkina, Emma-Jane Smith,I. T. Smith, M. Smith, A. Snoch, Maia Soares,L. Soares Lavra, M. D. Sokoloff, F. J. P. Soler, I. Solovyev,B. Souza De Paula, Bernhard Spaan, Elisabetta Spadaro Norella, Patrick Spradlin, Federico Stagni, Marian Stahl, S. Stahl, Pavol Štefko, Olaf Steinkamp, Simon Benedikt Stemmle, Oleg Stenyakin, Marcela Štěpánová, Holger Stevens,Sheldon Stone, Simone Stracka, M. E. Stramaglia,Mihai Straticiuc, D. M. Strekalina, Sergey Strokov, Jinyi Sun, Lantao Sun,Yipeng Sun,Peter Svihra, Krzysztof Swientek, Adam Szabelski,Tomasz Szumlak, Michal Szyma'nski, Savita Taneja,Zhipeng Tang, Tobias Tekampe, Frederic Teubert, E. Thomas, K. A. Thomson,M. J. Tilley, Vincent Tisserand, S T'jampens, Mark J. Tobin, Siim Tolk,Luca Tomassetti, Diego Torres Machado,D. Y. Tou, Edwige Tournefier, Maria Traill, M. T. Tran, E. Trifonova, Carina Trippl,Andrei Tsaregorodtsev, Giulia Tuci, A. Tully, N. Tuning, Artur Ukleja, A. Usachov, Andrei Ustyuzhanin, Ulrich Uwer, A. Vágner, Vincenzo Vagnoni, Andrea Valassi,Giovanna Valenti, Martinus van Beuzekom,H. van Hecke,E. van Herwijnen, Charlotte Barbara Van Hulse,M. van Veghel,R. Vazquez Gomez,P. Vazquez Regueiro,C. V'azquez Sierra,Stefania Vecchi, J. J. Velthuis, M. Veltri,Aravindhan Venkateswaran, Michele Veronesi, Mikko Vesterinen, Justan Barbosa, D. Vieira,M. Vieites Diaz, Harald Viemann, Xavier Vilasís-Cardona, Eva Figueras, Giorgio Vitali,Arseniy Vitkovskiy, Achim Vollhardt,Dorothea Vom Bruch, Alyeksandr Vorobyev,V. Vorobyev,N. Voropaev, Roland Waldi, J. Walsh, J. Wang, M. Wang, Y. Wang, Z. Wang,D. R. Ward,H. M. Wark, N. K. Watson, D. Websdale, A. Weiden, Constantin Weisser, B. D. C. Westhenry, D. J. White, Mark James Whitehead, D. Wiedner, George Wilkinson,M. Wilkinson, Ifan Williams, M. P. Williams, T. Williams, F. F. Wilson, Wojciech Wislicki, M. Witek, L. Witola, Guy Wormser, S. A. Wotton, H. Wu, Katrina Wyllie, Zhu Xiao Xiang, Dongyuan Xiao, Y. Xie, H. Xing,Ao Xu, Jiafa Xu, L. Xu, M. Xu, Q. Xu, Z. Xu, Z. Yang, Y. Yao,L. E. Yeomans, Hongmei Yin, Jia-ming Yu, X. Yuan, Oleg Yushchenko,K. A. Zarebski, Mikhail Zavertyaev, Milosz Zdybal, M. Zeng, Dongqin Zhang, Ls Zhang, Shuili Zhang, Yitang Zhang, Alexey Zhelezov, Yi-qiong Zheng, X. K. Zhou, Yu-yuan Zhou, Xiaoyu Zhu, V. Zhukov, J. B. Zonneveld, Stefano Zucchelli, Gianluca Zunica

semanticscholar（2020）

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摘要

This paper presents an analysis of the Λb → J/ψΛ angular distribution and the transverse production polarisation of Λb baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to an integrated luminosity of 4.9 fb−1, collected with the LHCb experiment. The polarisation is determined in a fiducial region of Λb transverse momentum and pseudorapidity of 1 < pT < 20 GeV/c and 2 < η < 5, respectively. The data are consistent with Λb baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the Λ→ pπ− decay is also determined from the data and its value is found to be consistent with a recent measurement by the BES III collaboration.

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