Search for beautiful tetraquarks in the ϒ(1S)μ+μ− invariant-mass spectrum
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13130_2018_Article_9184.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Aidala, C. A
Ajaltouni, Z.
Akar, S.
Albicocco, P.
Albrecht, J.
Alessio, F.
Alexander, M.
Date Issued
October 2018
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
LHCb Collaboration (Aaij, R., et al.) "Search for beautiful tetraquarks in the ϒ(1S)μ+μ− invariant-mass spectrum." Journal of High Energy Physics 2018, 10 (Oct. 2018): no. 86 doi 10.1007/JHEP10(2018)086 ©2018 Author(s)
Version
Final published version
Abstract
The ϒ(1S)μ+μ− invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two b¯¯ quarks, Xbb¯bb¯. The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies s√=7, 8 and 13 TeV, corresponding to an integrated luminosity of 6.3 fb−1. No significant excess is found, and upper limits are set on the product of the production cross-section and the branching fraction as functions of the mass of the X[subscript bbbb] state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range [2.0, 5.0], and the Xbb¯bb¯ state has rapidity in the range [2.0, 4.5] and transverse momentum less than 15 GeV/c.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
10.1007/JHEP10(2018)086
