Study of Λ b 0 and Ξ b 0 Decays to Λ h + h ′ − and Evidence for C P Violation in Λ b 0 → Λ K + K − Decays
R. Aaij, Ahmed Sameh Wagih Abdelmotteleb, Carlos Abellán Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, C. Aidala, Ziad Ajaltouni, S. Akar, Kazuyoshi Akiba, P. Albicocco, J. Albrecht, F. Alessio, M. Alexander, Zakariya Aliouche, P. Álvarez Cartelle, Renaud Amalric, S. Amato, J. L. Amey, Y. Amhis, Liupan An, L. Anderlini, M. Andersson, A. Andreianov, P. Andreola, Mirco Andreotti, D. Andreou, Alessia Anelli, D. Ao, F. Archilli, Matteo Argenton, S. Arguedas Cuendis, A. Artamonov, M. Artuso, E. Aslanides, Rita Ataíde da Silva, M. Atzeni, B. Audurier, D. Bacher, Irene Bachiller Perea, S. Bachmann, Marie Bachmayer, J. J. Back, P. Baladrón Rodríguez, V. Balagura, Anna Balboni, W. Baldini, Luca Balzani, Haoran Bao, J. Baptista de Souza Leite, Carlos Javier Barbero Pretel, M. Barbetti, I. R. Barbosa, R. J. Barlow, Mikhail Barnyakov, Sergey Barsuk, W. Barter, M. Bartolini, Justin Bartz, J. M. Basels, Saliha Bashir, G. Bassi, B. Batsukh, Piera Battista, A. Bay, A. Beck, M. Becker, F. Bedeschi, I. Bediaga, Noah Albin Behling, S. Belin, K. Belous, I. Belov, I. Belyaev, G. Benane, G. Bencivenni, E. Ben-Haim, A. Berezhnoy, R. Bernet, Sergi Bernet Andres, A. Bertolin, C. Betancourt, F. Betti, J. Bex, Ia. Bezshyiko, J. Bhom, M. S. Bieker, N. V. Biesuz, P. Billoir, A. Biolchini, M. Birch, F. C. R. Bishop, A. Bitadze, A. Bizzeti, T. Blake, F. Blanc, Jonah Evan Blank, S. Blusk, Vladimir Bocharnikov, J. A. Boelhauve, O. Boente García, Thomas Boettcher, A. Bohare, A. S. Boldyrev, Carolina Bolognani, R. Bolzonella, Riccardo Bonacci, N. Bondar, Aleksandar Bordelius, F. Borgato, S. Borghi, M. Borsato, J. T. Borsuk, Sonia Amina Bouchiba, Marcelo Bovill, T. J. V. Bowcock, A. Boyer, C. Bozzi, A. Brea Rodríguez, Nils Breer, Jolanta Brodzicka, A. Brossa Gonzalo, James David Brown, D. Brundu, E. Buchanan, A. Buonaura, L. Buonincontri, A. T. Burke, C. Burr, J. S. Butter, Jan Buytaert, W. Byczynski, S. Cadeddu, Hao Cai, Alois Caillet, R. Calabrese, Saul Calderon Ramirez, Lukas Calefice, S. Cali, M. Calvi, M. Calvo Gomez, P. Camargo Magalhaes, Jose Ivan Cambon Bouzas, P. Campana, D. H. Cámpora Pérez, A. Campoverde, S. Capelli, L. Capriotti, Ronald Gerardo Caravaca-Mora, A. Carbone, Lidia Carcedo Salgado, R. Cardinale, A. Cardini, P. Carniti, Leon David Carus, Adrian Casais Vidal, R. Caspary, Gianluigi Casse, M. Cattaneo, G. Cavallero, V. Cavallini, S. Celani, Daniel Cervenkov, Sara Cesare, A. J. Chadwick, Ibrahim Chahrour, Matthew Charles, Ph. Charpentier, Evridki Chatzianagnostou, Maximilien Chefdeville, 陈晨, S. Chen, Zewen Chen, A. Chernov, S. Chernyshenko, Xenofon Chiotopoulos, V. Chobanova, Serhii Cholak, M. Chrząszcz, A. Chubykin, V. Chulikov, P. Ciambrone, X. Cid Vidal, Gregory Ciezarek, P. Cifra, Peter Clarke, Marco Clemencic, H. V. Cliff, J. Closier, Carlos Eduardo Cocha Toapaxi, V. Coco, J. Cogan, Eric Cogneras, Lucian Cojocariu, Spencer Edward Collaviti, Paula Collins, T. Colombo, M. Colonna, A. Comerma-Montells, L. Congedo, A. Contu, N. Cooke, I. Corredoira, Anthony Correia, G. Corti, Josephine Jane Cottee Meldrum, B. Couturier, D. C. Craik, M. Cruz Torres, R. Currie, Cesar Luiz da Silva, Shakhzod Dadabaev, Lingyun Dai, X. Dai, E. Dall’Occo, J. Dalseno, C. D’Ambrosio, J. Daniel, A. Danilina, P. d’Argent, Gabriella Darze, Alexander Davidson, J. E. Davies, Adam Davis, Oscar de Aguiar Francisco, Camilla de Angelis, Federico de Benedetti, Jan de Boer, K. De Bruyn, S. De Capua, Michel de Cian, U. De Freitas Carneiro Da Graca, Erika de Lucia, J. M. De Miranda, L. De Paula, Marilisa de Serio, P. De Simone, F. De Vellis, Jacco de Vries, Francesco Debernardis, Daniel Decamp, Vlad-George Dedu, Sam Michael Dekkers, Luigi del Buono, B. Delaney, H.-P. Dembinski, Jianqiao Deng, V. Denysenko, O. Deschamps, F. Dettori, B. Dey, P. Di Nezza, I. Diachkov, S. Didenko, S. Ding, Lucas Dittmann, Vasyl Dobishuk, A. D. Docheva, C. Dong, Amanda May Donohoe, F. Dordei, Alberto dos Reis, Andrew Jay Dowling, Weisong Duan, P. Duda, M. W. Dudek, L. Dufour, V. Duk, P. Durante, M. M. Duras, John Matthew Durham, Ozgur Durmus, A. Dziurda, A. Dzyuba, S. Easo, Ellinor Eckstein, U. Egede, A. Egorychev, V. Egorychev, S. Eisenhardt, E. Ejopu, L. Eklund, Mohamed Elashri, Jan Hendrik Ellbracht, S. Ely, A. Ene, Jonas Nathanael Eschle, S. Esen, Timothy Evans, Federica Fabiano, L. N. Falcao, Y. Fan, B. Fang, L. Fantini, Maria Faria, Keira Gwyn Farmer, D. Fazzini, Lukasz Jerzy Felkowski, Mingjie Feng, M. Féo, Álvaro Fernández Casaní, Miguel Fernandez Gomez, Alex Daniel Fernez, F. Ferrari, F. Ferreira Rodrigues, M. Ferrillo, Massimiliano Ferro-Luzzi, S. Filippov, Rosa Anna Fini, M. Fiorini, M. Firlej, Kamil Leszek Fischer, Dillon Scott Fitzgerald, C. Fitzpatrick, T. Fiutowski, Frederic Fleuret, Marianna Fontana, Lucas Arthur Foreman, R. Forty, Daniel Foulds-Holt, V. Franco Lima, Manuel Franco Sevilla, M. Frank, E. Franzoso, G. Frau, C. Frei, D. A. Friday, Jinlin Fu, Quentin Fuehring, Yuki Fujii, T. Fulghesu, E. Gabriel, G. Galati, M. D. Galati, Abraham Gallas Torreira, D. Galli, Silvia Gambetta, M. Gandelman, P. Gandini, Bilal Ahmad Ganie, Han Gao, Tian-Qi Gao, Yang Gao, Yuanning Gao, Yuxi Gao, L. M. Garcia Martin, P. Garcia Moreno, J. García Pardiñas, Parker Taittinger Gardner, Kunal Garg, L. Garrido, C. Gaspar, Robbert Erik Geertsema, Louis Lenard Gerken, Evelina Gersabeck, M. Gersabeck, Timothy Gershon, Simon Ghizzo, Zahra Ghorbanimoghaddam, L. Giambastiani, Fotis Ioannis Giasemis, V. Gibson, H. K. Giemza, Alexander Leon Gilman, M. Giovannetti, A. Gioventù, Lucas George Girardey, P. Gironella Gironell, Carmen Giugliano, Maciej Artur Giza, E. L. Gkougkousis, F. C. Glaser, V. V. Gligorov, C. Göbel, E. Golobardes, D. Golubkov, Andrey Golutvin, S. Gomez Fernandez, Wojciech Gomułka, F. Goncalves Abrantes, Mateusz Goncerz, Guanghua Gong, J. A. Gooding, I. Gorelov, C. Gotti, J. P. Grabowski, Luis Alberto Granado Cardoso, E. Graugés, E. Graverini, L. Grazette, Giacomo Graziani, A. Grecu, L. M. Greeven, Nathan Allen Grieser, Lucia Grillo, S. Gromov, C. Gu, M. Guarise, L. Guerry, M. Guittiere, Vasilisa Guliaeva, P. A. Günther, Abdul-Kerim Guseinov, E. Gushchin, Yury Guz, T. Gys, Kai Sebastian Habermann, T. Hadavizadeh, C. Hadjivasiliou, G. Haefeli, Christophe Haen, Mohammadtaghi Hajheidari, George H. Hallett, Marius Maehlum Halvorsen, Phoebe Meredith Hamilton, J. Hammerich, Qundong Han, Xiaoxue Han, S. Hansmann-Menzemer, Lei Hao, Neville Harnew, M. Hartmann, Sabin Hashmi, J. He, Frédéric Hemmer, Conor Henderson, R. D. L. Henderson, Arthur Marius Hennequin, K. Hennessy, Louis Henry, James Daniel Herd, Paula Herrero Gascon, J. Heuel, A. Hicheur, Guillermo Hijano Mendizabal, J. Horswill, Ruiwen Hou, Y. R. Hou, Ned Francis Howarth, J. F. Hu, Wenhua Hu, Xiaofan Hu, Wenqian Huang, W. Hulsbergen, Ross John Hunter, Mikhail Hushchyn, D. Hutchcroft, M. Idzik, Dmitrii Ilin, P. Ilten, A. Inglessi, Aleksandr Iniukhin, A. Ishteev, К. Ившин, R. Jacobsson, H. Jage, S. J. Jaimes Elles, S. Jakobsen, E. Jans, Brij Kishor Jashal, A. Jawahery, Vukan Jevtic, Emily Kaiyin Jiang, X. Jiang, Yi Jiang, M. John, Allen Cris John Rubesh Rajan, D. Johnson, Thomas Peter Jones, Salil Joshi, Beat Jost, Juan Jose Juan Castella, N. Jurik, Izabela Juszczak, Dimitrios Kaminaris, S. Kandybei, Michael James Kane, Youen Kang, C. Kar, Matthias Karacson, Dmitrii Karpenkov, Anni Kauniskangas, J. W. Kautz, M. K. Kazanecki, Floris Keizer, Matthew Kenzie, T. Ketel, B. Khanji, Anastasiia Kharisova, S. Kholodenko, G. Khreich, T. Kirn, Veronica Soelund Kirsebom, Ouail Kitouni, S. Klaver, N. Kleijne, K. Klimaszewski, M. R. Kmiec, Lars Kolk, Anatoly Konoplyannikov, P. Kopciewicz, P. Koppenburg, M. Korolev, Igor Kostiuk, O. Kot, Sofia Kotriakhova, Anastasiia Kozachuk, P. Kravchenko, Leonid Kravchuk, M. Kreps, Pavel Krokovny, W. Krupa, W. Krzemień, Oleksandr Kshyvanskyi, Sebastian Antoni Kubis, M. Kucharczyk, V. Kudryavtsev, Evgenia Kulikova, A. Kupść, Bogdan Kutsenko, D. Lacarrère, Paloma Laguarta Gonzalez, A. Lai, A. Lampis, Davide Lancierini, Clara Landesa Gomez, J. J. Lane, R. Lane, G. Lanfranchi, C. Langenbruch, Jan Langer, O. Lantwin, T. Latham, F. Lazzari, C. Lazzeroni, R. Le Gac, Ho Sang Lee, R. Lefèvre, A. Leflat, S. Legotin, Marion Lehuraux, E. Lemos Cid, O. Leroy, T. Lesiak, Ezra Douglas Lesser, Blake Leverington, Anfeng Li, C. Li, H. Li, Kechen Li, Lanxing Li, Manshu Li, Peilian Li, Pei‐Rong Li, Qinze Li, Shiyang Li, Yanru Li, Zhengchen Lian, Xixin Liang, Simone Libralon, C. X. Lin, T. Lin, R. Lindner, Henry James Linton, V. Lisovskyi, Roman Litvinov, Frank Xiangyu Liu, Guoming Liu, Kai Liu, Shuaiyi Liu, Ying Liu, Yiwei Liu, A. Lobo Salvia, A. Loi, Thomas Long, Jose Lopes, A. Lopez Huertas, S. López Soliño, Qiuchan Lu, C. Lucarelli, Donatella Lucchesi, M. Lucio Martínez, Valeriia Lukashenko, Anna Lupato, E. Luppi, Kate Lynch, X. R. Lyu, Ge Ma, S. Maccolini, F. Machefert, F. Maciuc, Bridget Mack, Innes Mackay, Lauren Grace Mackey, L. R. Madhan Mohan, M. J. Madurai, A. Maevskiy, Daniel Magdalinski, D. Maisuzenko, M. W. Majewski, J. J. Malczewski, S. Malde, L. Malentacca, Alexander Malinin, T. Maltsev, G. Manca, G. Mancinelli, C. Mancuso, R. Manera Escalero, Federico Manganella, Daniele Manuzzi, D. Marangotto, J. F. Marchand, R. Marchevski, Umberto Marconi, Edoardo Mariani, S. Mariani, C. Marín Benito, Jörg Marks, Alexander Mclean Marshall, Lucas Martel, G. Martelli, G. Martellotti, L. Martinazzoli, M. Martinelli, Daniel Guillermo Martinez Gomez, D. Martínez Santos, A. Massafferri, R. Matev, A. Mathad, V. Matiunin, Clara Matteuzzi, Kara Renee Mattioli, A. Mauri, E. Maurice, J. Mauricio, Pierre Paul Louis Mayencourt, J. Mazorra de Cos, M. Mazurek, M. McCann, L. Mcconnell, T. H. McGrath, N. T. McHugh, A. McNab, R. McNulty, B. Meadows, G. Meier, D. Melnychuk, Fanjie Meng, M. Merk, A. Merli, L. Meyer Garcia, Dexing Miao, H. Miao, Mikhail Mikhasenko, Diego Alejandro Milanes, A. Minotti, E. Minucci, Tristan Miralles, Biljana Mitreska, D. S. Mitzel, Atanu Modak, R. A. Mohammed, R. D. Moise, Sergei Mokhnenko, Esteban Felipe Molina Cardenas, Titus Mombächer, Matthew David Monk, Stephane Monteil, G. Morello, M. J. Morello, Maurice Pierre Morgenthaler, J. Moroń, Wouter Morren, A. B. Morris, A. G. Morris, R. Mountain, H. Mu, Zeqing Mu, Emir Muhammad, F. Muheim, M. Mulder, Katharina Müller, F. Muñoz-Rojas, Rebecca Murta, P. Naik, Tatsuya Nakada, R. Nandakumar, Tara Nanut, Irina Nasteva, M. Needham, N. Néri, Sebastian Neubert, N. Neufeld, P. Neustroev, J. Nicolini, D. Nicotra, Elisabeth Maria Niel, N. Nikitin, Qile Niu, Pedro Nogarolli, Piet Nogga, C. Normand, J. Novoa Fernandez, Gabriel Matthew Nowak, C. Nunez, Havva Hasret Nur, A. Obłąkowska-Mucha, V. Obraztsov, Τ. Oeser, S. Okamura, A. Okhotnikov, Oleksandr Okhrimenko, R. Oldeman, F. Oliva, M. Olocco, C. J. G. Onderwater, R. H. O’Neil, Donata Osthues, J. M. Otalora Goicochea, P. Owen, Maria Aranzazu Oyanguren, Ö. Özçelik, Francesco Paciolla, Adam Padée, Klaas Padeken, B. Pagare, P. R. Pais, T. Pajero, A. Palano, M. Palutan, Xiaofan Pan, G. Panshin, L. Paolucci, Antonios Papanestis, M. Pappagallo, L. L. Pappalardo, Cheryl Pappenheimer, Christopher Parkes, Dhruvanshu Parmar, Barbara Passalacqua, Giovanni Passaleva, Daniele Passaro, Alessandra Pastore, Mitesh Patel, J. Patoc, C. Patrignani, Antara Paul, C. J. Pawley, A. Pellegrino, Ji Peng, M. Pepe Altarelli, S. Perazzini, D. Pereima, H. Pereira Da Costa, A. Pereiro Castro, P. Perret, A. Perrevoort, Alberto Perro, Michael Jacob Peters, Konstantinos Petridis, A. Petrolini, Jacob Pfaller, Hang Pham, L. Pica, Lorenzo Piccolo, Boleslaw Pietrzyk, G. Pietrzyk, D. Pinci, F. Pisani, Marco Pizzichemi, Vlad-Mihai Placinta, M. Pló Casasús, T. Poeschl, Francesco Polci, M. Poli Lener, A. Poluektov, N. Polukhina, I. Polyakov, E. Polycarpo, S. Ponce, D. Popov, S. Poslavskii, C. Prouvé, Daniele Provenzano, G. Punzi, Shah Rukh Qasim, Qucheng Qian, W. B. Qian, Ning Qin, S. Qu, R. Quagliani, R. I. Rabadán Trejo, J. H. Rademacker, M. Rama, Manuel Ramírez García, Victoria Ramos de Oliveira, Miguel Ramos Pernas, M. S. Rangel, F. Ratnikov, Gerhard Raven, Miguel Rebollo de Miguel, F. Redi, Jake Reich, F. Reiss, Z. Ren, P. K. Resmi, Gabriel Ricart, Domenico Riccardi, S. Ricciardi, Kate Abigail Richardson, Mary Richardson-Slipper, Kurt Rinnert, Patrick Robbe, G. Robertson, E. Rodrigues, A. Pazos Álvarez, Emilio Xose Rodriguez Fernandez, Jairo Alexis Rodriguez Lopez, E. Rodríguez Rodríguez, Jonas Malte Roensch, Alexander Rogovskiy, David Leonhard Rolf, P. Roloff, V. Romanovskiy, A. Romero Vidal, Gabriele Romolini, F. Ronchetti, Tianze Rong, M. Rotondo, Shreya Roy, M. S. Rudolph, Miguel Ruiz Diaz, R. A. Ruiz Fernandez, J. Ruiz Vidal, A. Ryzhikov, Jakub Ryzka, José Javier Saavedra-Arias, Juan Jose Saborido Silva, Rita Sadek, N. Sagidova, Debashis Sahoo, N. Sahoo, B. Saitta, Matteo Salomoni, Izaac Sanderswood, R. Santacesaria, M. Santimaria, Leonardo Santoro, Emanuele Santovetti, A. Saputi, D. Saranin, Andrej Sarnatskiy, Gediminas Sarpis, M. Sarpis, C. Satriano, A. Satta, D. Savrina, H. Sazak, Francesco Sborzacchi, Luke George Scantlebury Smead, Alessandro Scarabotto, S. Schael, Sigrid Scherl, M. Schiller, H. Schindler, M. Schmelling, S. Schmitt, H. Schmitz, O. Schneider, A. Schopper, Nicole Schulte, S. Schulte, Marie Helene Schune, Georg Schwering, B. Sciascia, Augusto Sciuccati, Ilya Segal, Sara Sellam, A. Semennikov, Thomas Christian Senger, M. S. Soares, A. Sergi, N. Serra, Lorenzo Sestini, A. Seuthe, Yiduo Shang, Desmond Mzamo Shangase, M. Shapkin, Rashi Sharma, Ivan Shchemerov, L. Shchutska, T. Shears, Lev Shekhtman, Z. Shen, S. Sheng, V. Shevchenko, Boan Shi, Qi Shi, Yuya Shimizu, Evgenii Shmanin, Roman Shorkin, Joseph David Shupperd, R. Silva Coutinho, G. Simi, S. Simone, N. Skidmore, T. Skwarnicki, M. Slater, J. C. Smallwood, E. Smith, K. 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Wilkinson, Mike Williams, Morag Jean Williams, M. Williams, Richard Morgan Williams, Z. Williams, M. Winn, Wojciech Wislicki, M. Witek, L. Witola, G. Wormser, S. A. Wotton, H. Wu, Jie Wu, Xiangyu Wu, Yanxi Wu, Zhenhong Wu, K. Wyllie, Shu Xian, Zhiyu Xiang, Yuehong Xie, A. Xu, Menglin Xu, Kang Yang, Shuangli Yang, Xueting Yang, Y. Yang, Z. Yang, V. Yeroshenko, Hang Yin, Xiaoyue Yin, J. Yu, X. Yuan, Yuan Yuan, E. Zaffaroni, M. Zavertyaev, M. Zdybał, Francesco Zenesini, C. Zeng, M. Zeng, C. Zhang, Dongliang Zhang, Jianyu Zhang, L. Zhang, Y. Zhang, Yuge Zhang, Ya Zhao, A. Zharkova, A. Zhelezov, Shuang Zheng, Xutao Zheng, Y. Zheng, Tianwen Zhou, Xiaokang Zhou, Yixiong Zhou, Valeriia Zhovkovska, Linxuan Zhu, Valery Zhukov, Jiahui Zhuo, Davide Zuliani, Gianluca Zunica
Rattachement africain : fr. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
A study of $\itΛ_{\it{b}}^\rm{0}$ and $\itΞ_{\it{b}}^\rm{0}$ decays to $\itΛ h^{+} h^{\prime -}$ $(h^{(\prime)}=π, K)$ is performed using $pp$ collision data collected by the LHCb experiment during LHC Runs 1$-$2, corresponding to an integrated luminosity of $9~\rm{fb}^{-1}$. The branching fractions for these decays are measured using the $\itΛ_{\it{b}}^\rm{0}\to\itΛ_{\it{c}}^+(\to\itΛπ^+)π^-$ decay as control channel. The decays $\itΛ_{\it{b}}^\rm{0}\to\itΛπ^+π^-$ and $\itΞ_{\it{b}}^\rm{0}\to\itΛK^-π^+$ are observed for the first time. For decay modes with sufficient signal yields, $CP$ asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for $CP$ violation in the $\itΛ_{\it{b}}^\rm{0}\to\itΛK^+K^-$ decay, interpreted as originating primarily from an asymmetric $\itΛ_{\it{b}}^\rm{0} \to \it{N}^{*+} \it{K}^-$ decay amplitude. The measured $CP$ asymmetries for the other decays are compatible with zero.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
Les institutions déclarées
Une affiliation ne permet pas de déduire la nationalité d’un auteur.