Search for the X(5568) State Decaying into B_{s}^{0}π^{±} in Proton-Proton Collisions at sqrt[s]=8 TeV.

Search for the X(5568) State Decaying into B_{s}^{0}π^{±} in Proton-Proton Collisions at sqrt[s]=8 TeV.

Physical review letters (2018-06-05)

A M Sirunyan, A Tumasyan, W Adam, F Ambrogi, E Asilar, T Bergauer, J Brandstetter, E Brondolin, M Dragicevic, J Erö, A Escalante Del Valle, M Flechl, M Friedl, R Frühwirth, V M Ghete, J Grossmann, J Hrubec, M Jeitler, A König, N Krammer, I Krätschmer, D Liko, T Madlener, I Mikulec, E Pree, N Rad, H Rohringer, J Schieck, R Schöfbeck, M Spanring, D Spitzbart, W Waltenberger, J Wittmann, C-E Wulz, M Zarucki, V Chekhovsky, V Mossolov, J Suarez Gonzalez, E A De Wolf, D Di Croce, X Janssen, J Lauwers, H Van Haevermaet, P Van Mechelen, N Van Remortel, S Abu Zeid, F Blekman, J D'Hondt, I De Bruyn, J De Clercq, K Deroover, G Flouris, D Lontkovskyi, S Lowette, I Marchesini, S Moortgat, L Moreels, Q Python, K Skovpen, S Tavernier, W Van Doninck, P Van Mulders, I Van Parijs, D Beghin, B Bilin, H Brun, B Clerbaux, G De Lentdecker, H Delannoy, B Dorney, G Fasanella, L Favart, R Goldouzian, A Grebenyuk, A K Kalsi, T Lenzi, J Luetic, T Maerschalk, A Marinov, T Seva, E Starling, C Vander Velde, P Vanlaer, D Vannerom, R Yonamine, F Zenoni, T Cornelis, D Dobur, A Fagot, M Gul, I Khvastunov, D Poyraz, C Roskas, S Salva, M Tytgat, W Verbeke, N Zaganidis, H Bakhshiansohi, O Bondu, S Brochet

PMID29864318

摘要

A search for resonancelike structures in the B_{s}^{0}π^{±} invariant mass spectrum is performed using proton-proton collision data collected by the CMS experiment at the LHC at sqrt[s]=8 TeV, corresponding to an integrated luminosity of 19.7 fb^{-1}. The B_{s}^{0} mesons are reconstructed in the decay chain B_{s}^{0}→J/ψϕ, with J/ψ→μ^{+}μ^{-} and ϕ→K^{+}K^{-}. The B_{s}^{0}π^{±} invariant mass distribution shows no statistically significant peaks for different selection requirements on the reconstructed B_{s}^{0} and π^{±} candidates. Upper limits are set on the relative production rates of the X(5568) and B_{s}^{0} states times the branching fraction of the decay X(5568)^{±}→B_{s}^{0}π^{±}. In addition, upper limits are obtained as a function of the mass and the natural width of possible exotic states decaying into B_{s}^{0}π^{±}.