Search for a new bottomonium state decaying to Υ(1S)π+π− in pp collisions at s√ = 8 TeV
(2013) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 727, n° 1-3, p. 57-76 (2013)
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- Abstract
- The results of a search for the bottomonium counterpart, denoted as Xb, of the exotic charmonium state X(3872) is presented. The analysis is based on a sample of pp collisions at View the MathML source collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 20.7 fb−1. The search looks for the exclusive decay channel Xb→ϒ(1S)π+π− followed by ϒ(1S)→μ+μ−. No evidence for an Xb signal is observed. Upper limits are set at the 95% confidence level on the ratio of the inclusive production cross sections times the branching fractions to ϒ(1S)π+π− of the Xb and the ϒ(2S). The upper limits on the ratio are in the range 0.9–5.4% for Xb masses between 10 and 11 GeV. These are the first upper limits on the production of a possible Xb at a hadron collider.
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CMS Collaboration, Quertenmont, L., Basegmez, S., Beluffi, C., Bruno, G., Castello, R., Caudron, A., Ceard, L., Da Silveira, G. G., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Jez, P., Lemaitre, V., Liao, J., Militaru, O., et al. (2013). Search for a new bottomonium state decaying to Υ(1S)π+π− in pp collisions at s√ = 8 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 727(1-3), 57-76. https://doi.org/10.1016/j.physletb.2013.10.016 (Original work published 2013)