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Publication - Dr Jaap Velthuis

    Search for excited Bc+ states


    Adinolfi, M, Buchanan, E, Chapman, M, Dalseno, J, Harnew, S, Kariuki, J, Maddrell-Mander, S, Naik, P, Petridis, K, Pomery, G, Price, E, Prouve, C, Rademacker, J, Richards, S, Saunders, D, Skidmore, N & Velthuis, J, 2018, ‘Search for excited Bc+ states’. Journal of High Energy Physics, vol 2018.


    A search is performed in the invariant mass spectrum of the B c + π+π system for the excited B c + states B c (21S0)+ and B c (23S1)+ using a data sample of pp collisions collected by the LHCb experiment at the centre-of-mass energy of s√=8 TeV, corresponding to an integrated luminosity of 2 fb−1. No evidence is seen for either state. Upper limits on the ratios of the production cross-sections of the B c (21S0)+ and B c (23S1)+ states times the branching fractions of B c (21S0)+ → B c + π+π and B c (23S1)+ → B c * +π+π over the production cross-section of the B c + state are given as a function of their masses. They are found to be between 0.02 and 0.14 at 95% confidence level for B c (21S0)+ and B c (23S1)+ in the mass ranges [6830, 6890] MeV/c2 and [6795, 6890] MeV/c2, respectively.

    Full details in the University publications repository