Abstract / Description of output
The $\Upsilon(1S)\mu^+\mu^-$ invariant-mass distribution is investigated for a possible exotic meson state composed of two $b$ quarks and two $\overline{b}$ quarks, $X_{b\overline{b}b\overline{b}}$. The analysis is based on a data sample of $pp$ collisions recorded with the LHCb detector at centre-of-mass energies $\sqrt{s} =$ 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 $X_{b\overline{b}b\overline{b}}$ state. The limits are set in the fiducial volume where all muons have pseudorapidity in the range $[2.0,5.0]$, and the $X_{b\overline{b}b\overline{b}}$ state has rapidity in the range $[2.0,4.5]$ and transverse momentum less than 15 GeV/$c$.
Original language | English |
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Article number | 86 |
Pages (from-to) | 1-21 |
Number of pages | 21 |
Journal | Journal of High Energy Physics |
Volume | N/A |
Early online date | 12 Oct 2018 |
DOIs | |
Publication status | E-pub ahead of print - 12 Oct 2018 |
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Matthew Needham
- School of Physics and Astronomy - Personal Chair of Flavour Physics
Person: Academic: Research Active