Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0 \to J/\psi p \bar{p}$ decays

• Published in: Physical review letters Vol. 128; no. 6
• Main Authors: Aaij, Roel, Abdelmotteleb, Ahmed Sameh Wagih, 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, Aliouche, Zakariya, Alkhazov, Georgy, Alvarez Cartelle, Paula, Amato, Sandra, Amey, Jake Lewis, Amhis, Yasmine, An, Liupan, Anderlini, Lucio, Andreianov, Aleksei, Andreotti, Mirco, Archilli, Flavio, Artamonov, Alexander, Artuso, Marina, Arzymatov, Kenenbek, Aslanides, Elie, Atzeni, Michele, Audurier, Benjamin, Bachmann, Sebastian, Bachmayer, Marie, Back, John, Baladron Rodriguez, Pablo, Balagura, Vladislav, Baldini, Wander, Baptista Leite, Juan, Barlow, Roger, Barsuk, Sergey, Barter, William, Bartolini, Matteo, Baryshnikov, Fedor, Basels, Jan-Marc, Bashir, Saliha, 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, Ia, Bezshyiko, Iaroslava, Bhasin, Srishti, Bhom, Jihyun, Bian, Lingzhu, Bieker, Martin Stefan, Bifani, Simone, Billoir, Pierre, 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, Alexander, Bondar, Nikolay, Borghi, Silvia, Borisyak, Maxim, Borsato, Martino, Borsuk, Jozef Tomasz, Bouchiba, Sonia Amina
• Format: Journal Article
• Language: English
• Published: American Physical Society 2022
• Subjects: High Energy Physics - Experiment; Physics; error: statistical; B/s0: hadronic decay; experimental results; J/psi; amplitude analysis; CERN LHC Coll; LHC-B; structure; mass spectrum: (anti-p J/psi); data analysis method; mass spectrum: (p J/psi); B/s0 > > J/psi p anti-p; p p: scattering; p p: colliding beams
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.128.062001

An amplitude analysis of flavor-untagged Bs0 → J / ψp p ¯ decays is performed using a sample of 797±31 decays reconstructed with the LHCb detector. The data, collected in proton-proton collisions between 2011 and 2018, correspond to an integrated luminosity of 9  fb-1 . Evidence for a new structure in the J / ψp and J / ψ p ¯ systems with a mass of 4337-4+7 -2+2  MeV and a width of 29-12+26 -14+14  MeV is found, where the first uncertainty is statistical and the second systematic, with a significance in the range of 3.1 to 3.7σ , depending on the assigned JP hypothesis.