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Observation of sizeable $\omega$ contribution to $\chi_{c1}(3872) \to \pi^+\pi^- J/\psi$ decays

Resonant structures in the dipion mass spectrum from $\chi_{c1}(3872)\to\pi^+\pi^- J/\psi$ decays, produced via $B^+\to K^+\chi_{c1}(3872)$ decays, are analyzed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$. A sizeable c...

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Autores principales: Aaij, Roel, Abdelmotteleb, Ahmed Sameh Wagih, Abellan Beteta, Carlos, Abudinén, Fernando Jesus, Ackernley, Thomas, Adeva, Bernardo, Adinolfi, Marco, Afsharnia, Hossein, Agapopoulou, Christina, Aidala, Christine Angela, Aiola, Salvatore, Ajaltouni, Ziad, Akar, Simon, Akiba, Kazuyoshi, Albrecht, Johannes, Alessio, Federico, Alexander, Michael, Alfonso Albero, Alejandro, Aliouche, Zakariya, Alvarez Cartelle, Paula, Amato, Sandra, Amey, Jake Lewis, Amhis, Yasmine, An, Liupan, Anderlini, Lucio, Andersson, Martin, Andreianov, Aleksei, Andreotti, Mirco, Ao, Dong, Archilli, Flavio, Artamonov, Alexander, Artuso, Marina, Arzymatov, Kenenbek, Aslanides, Elie, Atzeni, Michele, Audurier, Benjamin, Bachmann, Sebastian, Bachmayer, Marie, Back, J.J., Bailly-reyre, Aurelien, Baladron Rodriguez, Pablo, Balagura, Vladislav, Baldini, Wander, Baptista de Souza Leite, Juan, Barbetti, Matteo, Barlow, Roger, Barsuk, Sergey, Barter, William, Bartolini, Matteo, Baryshnikov, Fedor, Basels, Jan-Marc, Bassi, Giovanni, Batsukh, Baasansuren, Battig, Alexander, Bay, Aurelio, Beck, Anja, Becker, Maik, Bedeschi, Franco, Bediaga, Ignacio, Beiter, Andrew, Belavin, Vladislav, Belin, Samuel, Bellee, Violaine, Belous, Konstantin, Belov, Ilia, Belyaev, Ivan, Bencivenni, Giovanni, Ben-Haim, Eli, Berezhnoy, Alexander, Bernet, Roland, Berninghoff, Daniel, Bernstein, Harris Conan, Bertella, Claudia, Bertolin, Alessandro, Betancourt, Christopher, Betti, Federico, Bezshyiko, Iaroslava, Bezshyiko, Ia., Bhasin, Srishti, Bhom, Jihyun, Bian, Lingzhu, Bieker, Martin Stefan, Biesuz, Nicolo Vladi, Bifani, Simone, Billoir, Pierre, Biolchini, Alice, Birch, Matthew, Bishop, Fionn Caitlin Ros, Bitadze, Alexander, Bizzeti, Andrea, Bjørn, Mikkel, Blago, Michele Piero, Blake, Thomas, Blanc, Frederic, Blusk, Steven, Bobulska, Dana, Boelhauve, Julian Alexander, Boente Garcia, Oscar, Boettcher, Thomas, Boldyrev, Alexey, Bondar, Nikolay, Borghi, Silvia, Borisyak, Maxim, Borsato, Martino, Borsuk, Jozef 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Michal, McCann, Michael, Mcconnell, Lucas, McGrath, Tamaki Holly, McHugh, Niall Thomas, McNab, Andrew, McNulty, Ronan, Mead, James Vincent, Meadows, Brian, Meier, Gerwin, Melnychuk, Dmytro, Meloni, Simone, Merk, Marcel, Merli, Andrea, Meyer Garcia, Lucas, Mikhasenko, Mikhail, Milanes, Diego Alejandro, Millard, Edward James, Milovanovic, Marko, Minard, Marie-Noelle, Minotti, Alessandro, Mitchell, Sara Elizabeth, Mitreska, Biljana, Mitzel, Dominik Stefan, Mödden, Antje, Mohammed, Rizwaan Adeeb, Moise, Razvan-Daniel, Mokhnenko, Sergei, 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, Mulder, Mick, Müller, Katharina, Murphy, Colm Harold, Murray, Donal, Murta, Rebecca, Muzzetto, Piera, Naik, Paras, Nakada, Tatsuya, Nandakumar, Raja, Nanut, Tara, Nasteva, Irina, Needham, Matthew, Neri, Nicola, Neubert, 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Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.108.L011103
http://cds.cern.ch/record/2807721
Descripción
Sumario:Resonant structures in the dipion mass spectrum from $\chi_{c1}(3872)\to\pi^+\pi^- J/\psi$ decays, produced via $B^+\to K^+\chi_{c1}(3872)$ decays, are analyzed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb$^{-1}$. A sizeable contribution from the isospin conserving $\chi_{c1}(3872)\to\omega J/\psi$ decay is established for the first time, $(21.4\pm2.3\pm2.0)\%$, with a significance of more than $7.1\sigma$. The amplitude of isospin violating decay, $\chi_{c1}(3872)\to\rho^0 J/\psi$, relative to isospin conserving decay, $\chi_{c1}(3872)\to\omega J/\psi$, is properly determined, and it is a factor of six larger than expected for a pure charmonium state.