Search for excited Bc+ states

Marco Adinolfi, Emma Buchanan, Matthew Chapman, Jeremy Dalseno, Sam Harnew, James Kariuki, Samuel Maddrell-Mander, Paras Naik, Konstantinos Petridis, Gabriela Pomery, Eugenia Price, Claire Prouve, Jonas Rademacker, Sophie Richards, Daniel Saunders, Nicola Skidmore, Jaap Velthuis

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Abstract

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.
Original languageEnglish
Article number138
Number of pages18
JournalJournal of High Energy Physics
Volume2018
Issue number1
Early online date29 Jan 2018
DOIs
Publication statusPublished - Jan 2018

Keywords

  • B physics
  • Hadron-Hadron scattering (experiments)
  • Spectroscopy

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  • Projects

    Bristol Consolidated Grant 2015-9

    Goldstein, J.

    1/10/1530/09/20

    Project: Research

    Cite this

    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, 2018(1), [138]. https://doi.org/10.1007/JHEP01(2018)138