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  • Study of excited Λb0 states...
    Van Putte, S.; Python, Q.; Bilin, B.; Khvastunov, I.; Aleksandrov, A.; Misheva, M.; Ivanov, T.; Petkov, P.; Liao, H.; Levin, A.; Brigljevic, V.; Kveton, A.; Kirschenmann, H.; Karimäki, V.; Besancon, M.; Charlot, C.; Conte, E.; Lethuillier, M.; Zaleski, S.; Faltermann, N.; Geralis, T.; Loukas, D.; Papavergou, I.; Csanad, M.; Bencze, G.; Csorgo, T.; Panwar, L.; Bhatnagar, V.; Sharma, R.; Chatterjee, S.; Fiore, L.; Maggi, G.; Marcellini, S.; Tosi, N.; Albergo, S.; Barbagli, G.; Lista, L.; Voevodina, E.; Zumerle, G.; Argiro, S.; Candelise, V.; Heredia-De La Cruz, I.; Carrillo Moreno, S.; Avati, V.; Bluj, M.; Konecki, M.; Bastos, D.; Hollar, J.; Barnyakov, A.; Bedoya, Cristina F.; Fernández Ramos, J.P.; Navarro Tobar, Á.; de Trocóniz, J.F.; Di Maria, R.; Karacheban, O.; Kaspar, J.; Rovere, M.; Sphicas, P.; Erdmann, W.; Botta, C.; Boran, F.; Dolek, F.; Gurpinar Guler, E.; Ozdemir, K.; Shepherd-Themistocleous, C.H.; Nash, J.; Wong, W.Y.; Pellett, D.; Burt, K.; Si, W.; Stuart, D.; Vlimant, J.R.; Mcdermott, K.; Tan, S.M.; Zientek, M.; Bhat, P.C.; Johnson, M.; Shi, K.; Wang, J.; Evdokimov, O.; Duric, S.; Kaadze, K.; Modak, A.; Rebassoo, F.; Mignerey, A.C.; Claes, D.R.; Marzocchi, B.; Velasco, M.; Dev, N.; Mahakud, B.; Schulte, J.F.; Trevisani, N.; Baty, A.; Geurts, F.J.M.; Kaplan, S.; Delgado, A.; Greene, S.; Tuo, S.; Galloni, C.; Teague, D.

    Physics letters. B, 04/2020, Letnik: 803
    Journal Article

    A study of excited Λb0 baryons is reported, based on a data sample collected in 2016–2018 with the CMS detector at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of up to 140fb−1. The existence of four excited Λb0 states: Λb0(5912)0, Λb0(5920)0, Λb0(6146)0, and Λb0(6152)0 in the Λb0π+π− mass spectrum is confirmed, and their masses are measured. The Λb0π+π− mass distribution exhibits a broad excess of events in the region of 6040–6100 MeV, whose origin cannot be discerned with the present data.