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

This paper presents an analysis of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the transverse production polarisation of $\Lambda^0_b$ baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. The measurements are performed using data corresponding to...

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Autores principales: Aaij, Roel, Abellán Beteta, Carlos, Ackernley, Thomas, Adeva, Bernardo, Adinolfi, Marco, Afsharnia, Hossein, Aidala, Christine Angela, Aiola, Salvatore, Ajaltouni, Ziad, Akar, Simon, Albrecht, Johannes, Alessio, Federico, Alexander, Michael, Alfonso Albero, Alejandro, Alkhazov, Georgy, Alvarez Cartelle, Paula, Alves Jr, Antonio Augusto, Amato, Sandra, Amhis, Yasmine, An, Liupan, Anderlini, Lucio, Andreassi, Guido, Andreianov, Aleksei, Andreotti, Mirco, Archilli, Flavio, Artamonov, Alexander, Artuso, Marina, Arzymatov, Kenenbek, Aslanides, Elie, Atzeni, Michele, Audurier, Benjamin, Bachmann, Sebastian, Back, John, Baker, Sophie, Balagura, Vladislav, Baldini, Wander, Baptista Leite, Juan, Barlow, Roger, Barsuk, Sergey, Barter, William, Bartolini, Matteo, Baryshnikov, Fedor, Basels, Jan-Marc, Bassi, Giovanni, Batozskaya, Varvara, Batsukh, Baasansuren, Battig, Alexander, Bay, Aurelio, Becker, Maik, Bedeschi, Franco, Bediaga, Ignacio, Beiter, Andrew, Belavin, Vladislav, Belin, Samuel, Bellee, Violaine, Belous, Konstantin, Belyaev, Ivan, Bencivenni, Giovanni, Ben-Haim, Eli, Benson, Sean, Berezhnoy, Alexander, Bernet, Roland, Berninghoff, Daniel, Bernstein, Harris Conan, Bertella, Claudia, Bertholet, Emilie, Bertolin, Alessandro, Betancourt, Christopher, Betti, Federico, Bettler, Marc-Olivier, Bezshyiko, Iaroslava, Bhasin, Srishti, Bhom, Jihyun, Bieker, Martin Stefan, Bifani, Simone, Billoir, Pierre, Bizzeti, Andrea, Bjørn, Mikkel, Blago, Michele Piero, Blake, Thomas, Blanc, Frederic, Blusk, Steven, Bobulska, Dana, Bocci, Valerio, Boente Garcia, Oscar, Boettcher, Thomas, Boldyrev, Alexey, Bondar, Alexander, Bondar, Nikolay, Borghi, Silvia, Borisyak, Maxim, Borsato, Martino, Borsuk, Jozef Tomasz, Bowcock, Themistocles, Boyer, Alexandre, Bozzi, Concezio, Bradley, Matthew John, Braun, Svende, Brea Rodriguez, Alexandre, Brodski, Michael, Brodzicka, Jolanta, Brossa Gonzalo, Arnau, Brundu, Davide, Buchanan, Emma, Büchler-Germann, Angela, Buonaura, Annarita, Burr, Christopher, Bursche, Albert, Butkevich, Anatoly, Butter, Jordy Sebastiaan, Buytaert, Jan, Byczynski, Wiktor, Cadeddu, Sandro, Cai, Hao, Calabrese, Roberto, Calero Diaz, Liliet, Cali, Stefano, Calladine, Ryan, Calvi, Marta, Calvo Gomez, Miriam, Camargo Magalhaes, Patricia, Camboni, Alessandro, Campana, Pierluigi, Campora Perez, Daniel Hugo, Campoverde Quezada, Angel Fernando, Capriotti, Lorenzo, Carbone, Angelo, Carboni, Giovanni, Cardinale, Roberta, Cardini, Alessandro, Carli, Ina, Carniti, Paolo, Carvalho Akiba, Kazuyoshi, Casais Vidal, Adrian, Casse, Gianluigi, Cattaneo, Marco, Cavallero, Giovanni, Celani, Sara, Cenci, Riccardo, Cerasoli, Jacopo, Chapman, Matthew George, Charles, Matthew, Charpentier, Philippe, Chatzikonstantinidis, Georgios, Chefdeville, Maximilien, Chekalina, Viktoriia, Chen, Chen, Chen, Shanzhen, Chernov, Aleksei, Chitic, Stefan-Gabriel, Chobanova, Veronika, Cholak, Serhii, Chrzaszcz, Marcin, Chubykin, Alexsei, Chulikov, Vladimir, Ciambrone, Paolo, Cicala, Maria Flavia, Cid Vidal, Xabier, Ciezarek, Gregory, Cindolo, Federico, Clarke, Peter, Clemencic, Marco, Cliff, Harry, Closier, Joel, Cobbledick, John Leslie, Coco, Victor, Coelho, Joao A B, Cogan, Julien, Cogneras, Eric, Cojocariu, Lucian, Collins, Paula, Colombo, Tommaso, Contu, Andrea, Cooke, Naomi, Coombs, George, Coquereau, Samuel, Corti, Gloria, Costa Sobral, Cayo Mar, Couturier, Benjamin, Craik, Daniel Charles, Crkovská, Jana, Crocombe, Andrew, Cruz Torres, Melissa Maria, Currie, Robert, Da Silva, Cesar Luiz, Dall'Occo, Elena, Dalseno, Jeremy, D'Ambrosio, Carmelo, Danilina, Anna, d'Argent, Philippe, Davis, Adam, De Aguiar Francisco, Oscar, De Bruyn, Kristof, De Capua, Stefano, De Cian, Michel, De Miranda, Jussara, De Paula, Leandro, De Serio, Marilisa, De Simone, Patrizia, de Vries, Jacco, Dean, Cameron Thomas, Dean, William, Decamp, Daniel, Del Buono, Luigi, Delaney, Blaise, Dembinski, Hans Peter, Dendek, Adam, Denysenko, Vadym, Derkach, Denis, Deschamps, Olivier, Desse, 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Igor Vladimirovich, Gotti, Claudio, Govorkova, Ekaterina, Grabowski, Jascha Peter, Graciani Diaz, Ricardo, Grammatico, Thomas, Granado Cardoso, Luis Alberto, Graugés, Eugeni, Graverini, Elena, Graziani, Giacomo, Grecu, Alexandru, Greim, Roman, Griffith, Peter, Grillo, Lucia, Gruber, Lukas, Gruberg Cazon, Barak Raimond, Gu, Chenxi, Guarise, Marco, Günther, Paul Andre, Gushchin, Evgeny, Guth, Andreas, Guz, Yury, Gys, Thierry, Hadavizadeh, Thomas, Haefeli, Guido, Haen, Christophe, Haines, Susan, Hamilton, Phoebe Meredith, Han, Qundong, Han, Xiaoxue, Hancock, Thomas Henry, Hansmann-Menzemer, Stephanie, Harnew, Neville, Harrison, Thomas, Hart, Robert, Hasse, Christoph, Hatch, Mark, He, Jibo, Hecker, Malte, Heijhoff, Kevin, Heinicke, Kevin, Hennequin, Arthur Marius, Hennessy, Karol, Henry, Louis, Heuel, Johannes, Hicheur, Adlène, Hill, Donal, Hilton, Martha, Hopchev, Plamen Hristov, Hu, Jiangqiao, Hu, Jifeng, Hu, Wenhua, Huang, Wenqian, Hulsbergen, Wouter, Humair, Thibaud, Hunter, Ross John, 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Wojciech, Kucewicz, Wojciech, Kucharczyk, Marcin, Kudryavtsev, Vasily, Kuindersma, Hilbrand Steffen, Kunde, Gerd Joachim, Kvaratskheliya, Tengiz, Lacarrere, Daniel, Lafferty, George, Lai, Adriano, Lancierini, Davide, Lane, John Jake, Lanfranchi, Gaia, Langenbruch, Christoph, Lantwin, Oliver, Latham, Thomas, Lazzari, Federico, Le Gac, Renaud, Lee, Sook Hyun, Lefèvre, Regis, Leflat, Alexander, Leroy, Olivier, Lesiak, Tadeusz, Leverington, Blake, Li, Hengne, Li, Lei, Li, Xuan, Li, Yiming, Li, Zhuoming, Liang, Xixin, Lin, Tai-hua, Lindner, Rolf, Lisovskyi, Vitalii, Liu, Guoming, Liu, Shuaiyi, Liu, Xuesong, Loh, David, Loi, Angelo, Lomba Castro, Julian, Longstaff, Iain, Lopes, Jose, Loustau, Guillermo, Lovell, George Holger, Lu, Yu, Lucchesi, Donatella, Lucio Martinez, Miriam, Luo, Yiheng, Lupato, Anna, Luppi, Eleonora, Lupton, Oliver, Lusiani, Alberto, Lyu, Xiao-Rui, Maccolini, Serena, Machefert, Frederic, Maciuc, Florin, Macko, Vladimir, Mackowiak, Patrick, Maddrell-Mander, Samuel, Madhan Mohan, Lakshan Ram, Maev, Oleg, Maevskiy, Artem, Maisuzenko, Dmitrii, Majewski, Maciej Witold, Malde, Sneha, Malecki, Bartosz, Malinin, Alexander, Maltsev, Timofei, Malygina, Hanna, Manca, Giulia, Mancinelli, Giampiero, Manera Escalero, Rafel, Manuzzi, Daniele, Marangotto, Daniele, Maratas, Jan, Marchand, Jean François, Marconi, Umberto, Mariani, Saverio, Marin Benito, Carla, Marinangeli, Matthieu, Marino, Pietro, Marks, Jörg, Marshall, Phillip John, Martellotti, Giuseppe, Martinazzoli, Loris, Martinelli, Maurizio, Martinez Santos, Diego, Martinez Vidal, Fernando, Massafferri, André, Materok, Marcel, Matev, Rosen, Mathad, Abhijit, Mathe, Zoltan, Matiunin, Viacheslav, Matteuzzi, Clara, Mattioli, Kara Renee, Mauri, Andrea, Maurice, Emilie, McCann, Michael, Mcconnell, Lucas, McNab, Andrew, McNulty, Ronan, Mead, James Vincent, Meadows, Brian, Meaux, Cedric, Meier, Gerwin, Meinert, Nis, Melnychuk, Dmytro, Meloni, Simone, Merk, Marcel, Merli, Andrea, Meyer Garcia, Lucas, Mikhasenko, Mikhail, Milanes, Diego Alejandro, Millard, Edward James, Minard, Marie-Noelle, Mineev, Oleg, Minzoni, Luca, Mitchell, Sara Elizabeth, Mitreska, Biljana, Mitzel, Dominik Stefan, Mödden, Antje, Mogini, Andrea, Moise, Razvan Daniel, Mombächer, Titus, Monroy, Igancio Alberto, Monteil, Stephane, Morandin, Mauro, Morello, Gianfranco, Morello, Michael Joseph, Moron, Jakub, Morris, Adam Benjamin, Morris, Andrew George, Mountain, Raymond, Mu, Hongjie, Muheim, Franz, Mukherjee, Maitreyee, Mulder, Mick, Müller, Dominik, Müller, Katharina, Murphy, Colm Harold, Murray, Donal, Muzzetto, Piera, Naik, Paras, Nakada, Tatsuya, Nandakumar, Raja, Nanut, Tara, Nasteva, Irina, Needham, Matthew, Neri, Ilaria, Neri, Nicola, Neubert, Sebastian, Neufeld, Niko, Newcombe, Ryan, Nguyen, Thi Dung, Nguyen-Mau, Chung, Niel, Elisabeth Maria, Nieswand, Simon, Nikitin, Nikolay, Nolte, Niklas Stefan, Nunez, Cynthia, Oblakowska-Mucha, Agnieszka, Obraztsov, Vladimir, Ogilvy, Stephen, O'Hanlon, Daniel Patrick, Oldeman, Rudolf, Onderwater, Gerco, Osborn, Joseph Daniel, Ossowska, Anna, Otalora Goicochea, Juan Martin, Ovsiannikova, Tatiana, Owen, Patrick, Oyanguren, Maria Aranzazu, Pais, Preema Rennee, Pajero, Tommaso, Palano, Antimo, Palutan, Matteo, Panshin, Gennady, Papanestis, Antonios, Pappagallo, Marco, Pappalardo, Luciano, Pappenheimer, Cheryl, Parker, William, Parkes, Christopher, Parkinson, Christopher John, Passaleva, Giovanni, Pastore, Alessandra, Patel, Mitesh, Patrignani, Claudia, Pearce, Alex, Pellegrino, Antonio, Pepe Altarelli, Monica, Perazzini, Stefano, Pereima, Dmitrii, Perret, Pascal, Petridis, Konstantinos, Petrolini, Alessandro, Petrov, Aleksandr, Petrucci, Stefano, Petruzzo, Marco, Pietrzyk, Boleslaw, Pietrzyk, Guillaume, Pili, Martina, Pinci, Davide, Pinzino, Jacopo, Pisani, Flavio, Piucci, Alessio, Placinta, Vlad-Mihai, Playfer, Stephen, Plews, Jonathan, Plo Casasus, Maximo, Polci, Francesco, Poli Lener, Marco, Poliakova, Mariia, Poluektov, Anton, Polukhina, Natalia, Polyakov, Ivan, Polycarpo, Erica, Pomery, Gabriela Johanna, Ponce, Sebastien, Popov, Alexander, Popov, Dmitry, Poslavskii, Stanislav, Prasanth, Kodassery, Promberger, Laura, Prouve, Claire, Pugatch, Valery, Puig Navarro, Albert, Pullen, Hannah Louise, Punzi, Giovanni, Qian, Wenbin, Qin, Jia-Jia, Quagliani, Renato, Quintana, Boris, Raab, Naomi Veronika, Rabadan Trejo, Raul Iraq, Rachwal, Bartlomiej, Rademacker, Jonas, Rama, Matteo, Ramos Pernas, Miguel, Rangel, Murilo, Ratnikov, Fedor, Raven, Gerhard, Reboud, Meril, Redi, Federico, Reiss, Florian, Remon Alepuz, Clara, Ren, Zan, Renaudin, Victor, Ricciardi, Stefania, Richards, Daniel Stephen, Richards, Sophie, Rinnert, Kurt, Robbe, Patrick, Robert, Arnaud, Rodrigues, Ana Barbara, Rodrigues, Eduardo, Rodriguez Lopez, Jairo Alexis, Roehrken, Markus, Rollings, Alexandra Paige, Romanovskiy, Vladimir, Romero Lamas, Marcos, Romero Vidal, Antonio, Roth, Jordan Daniel, Rotondo, Marcello, Rudolph, Matthew Scott, Ruf, Thomas, Ruiz Vidal, Joan, Ryzhikov, Artem, Ryzka, Jakub, Saborido Silva, Juan Jose, Sagidova, Naylya, Sahoo, Niladribihari, Saitta, Biagio, Sanchez Gras, Cristina, Sanchez Mayordomo, Carlos, Santacesaria, Roberta, Santamarina Rios, Cibran, Santimaria, Marco, Santovetti, Emanuele, Sarpis, Gediminas, Sarpis, Minaugas, Sarti, Alessio, Satriano, Celestina, Satta, Alessia, Saur, Miroslav, Savrina, Darya, Scantlebury Smead, Luke George, Schael, Stefan, Schellenberg, Margarete, Schiller, Manuel, Schindler, Heinrich, Schmelling, Michael, Schmelzer, Timon, Schmidt, Burkhard, Schneider, Olivier, Schopper, Andreas, Schreiner, HF, Schubiger, Maxime, Schulte, Sebastian, Schune, Marie Helene, Schwemmer, Rainer, Sciascia, Barbara, Sciubba, Adalberto, Sellam, Sara, Semennikov, Alexander, Sergi, Antonino, Serra, Nicola, Serrano, Justine, Sestini, Lorenzo, Seuthe, Alex, Seyfert, Paul, Shangase, Desmond Mzamo, Shapkin, Mikhail, Shchutska, Lesya, Shears, Tara, Shekhtman, Lev, Shevchenko, Vladimir, Shmanin, Evgenii, Shupperd, Joseph David, Siddi, 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Vincent, T'Jampens, Stephane, Tobin, Mark, Tolk, Siim, Tomassetti, Luca, Torres Machado, Diego, Tou, Da Yu, Tournefier, Edwige, Traill, Murdo, Tran, Minh Tâm, Trifonova, Ekaterina, Trippl, Carina, Tsaregorodtsev, Andrei, Tuci, Giulia, Tully, Alison, Tuning, Niels, Ukleja, Artur, Usachov, Andrii, Ustyuzhanin, Andrey, Uwer, Ulrich, Vagner, Alexander, Vagnoni, Vincenzo, Valassi, Andrea, Valenti, Giovanni, van Beuzekom, Martinus, Van Hecke, Hubert, van Herwijnen, Eric, Van Hulse, Charlotte Barbara, van Veghel, Maarten, Vazquez Gomez, Ricardo, Vazquez Regueiro, Pablo, Vázquez Sierra, Carlos, Vecchi, Stefania, Velthuis, Jaap, Veltri, Michele, Venkateswaran, Aravindhan, Veronesi, Michele, Vesterinen, Mika, Viana Barbosa, Joao Vitor, Vieira, Daniel, Vieites Diaz, Maria, Viemann, Harald, Vilasis-Cardona, Xavier, Vilella Figueras, Eva, Vitali, Giacomo, Vitkovskiy, Arseniy, Vollhardt, Achim, Vom Bruch, Dorothea, Vorobyev, Alexey, Vorobyev, Vitaly, Voropaev, Nikolai, Waldi, Roland, Walsh, John, Wang, Jianqiao, Wang, Jike, Wang, Jianchun, Wang, Mengzhen, Wang, Yilong, Wang, Zhenzi, Ward, David, Wark, Heather Mckenzie, Watson, Nigel, Websdale, David, Weiden, Andreas, Weisser, Constantin, Westhenry, Benedict Donald C, White, Dylan James, Whitehead, Mark, Wiedner, Dirk, Wilkinson, Guy, Wilkinson, Michael, Williams, Ifan, Williams, Mike, Williams, Mark Richard James, Williams, Timothy, Wilson, Fergus, Wislicki, Wojciech, Witek, Mariusz, Witola, Lukas, Wormser, Guy, Wotton, Stephen, Wu, Hangyi, Wyllie, Kenneth, Xiang, Zhiyu, Xiao, Dong, Xie, Yuehong, Xing, Hongxi, Xu, Ao, Xu, Jingyi, Xu, Li, Xu, Menglin, Xu, Qingnian, Xu, Zehua, Yang, Zhenwei, Yang, Zishuo, Yao, Yuezhe, Yeomans, Lauren Emma, Yin, Hang, Yu, Jiesheng, Yuan, Xuhao, Yushchenko, Oleg, Zarebski, Kristian Alexander, Zavertyaev, Mikhail, Zdybal, Milosz, Zeng, Ming, Zhang, Dongliang, Zhang, Liming, Zhang, Shunan, Zhang, Yanxi, Zhelezov, Alexey, Zheng, Yangheng, Zhou, Xiaokang, Zhou, Yixiong, Zhu, Xianglei, Zhukov, Valery, Zonneveld, Jennifer Brigitta, Zucchelli, Stefano, Zunica, Gianluca
Lenguaje:eng
Publicado: 2020
Materias:
Acceso en línea:https://dx.doi.org/10.1007/JHEP06(2020)110
http://cds.cern.ch/record/2715807
Descripción
Sumario:This paper presents an analysis of the $\Lambda^0_b\rightarrow J/\psi\Lambda$ angular distribution and the transverse production polarisation of $\Lambda^0_b$ 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 $\Lambda^0_b$ transverse momentum and pseudorapidity of $1 < p_{\mathrm{T}} < 20$ GeV$/c$ and $2 < \eta < 5$, respectively. The data are consistent with $\Lambda^0_b$ baryons being produced unpolarised in this region. The parity-violating asymmetry parameter of the $\Lambda\rightarrow p\pi^-$ decay is also determined from the data and its value is found to be consistent with a recent measurement by the $\text{BES III}$ collaboration.