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    Comparative studies of cytotoxicity of dental acrylates in vitro

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    Measurement of χ<sub><i>c</i>1</sub> (3872) production in proton-proton collisions at √<i>s</i>=8 and 13 TeV

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    AbstractThe production cross-section of theχc1(3872) state relative to theψ(2S) meson is measured using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies ofs \sqrt{s} s= 8 and 13 TeV, corresponding to integrated luminosities of 2.0 and 5.4 fb−1, respectively. The two mesons are reconstructed in theJ/ψπ+π−final state. The ratios of the prompt and nonpromptχc1(3872) toψ(2S) production cross-sections are measured as a function of transverse momentum,pT, and rapidity,y, of theχc1(3872) andψ(2S) states, in the kinematic range 4&lt; pT&lt;20 GeV/cand 2.0&lt; y &lt;4.5. The prompt ratio is found to increase withpT, independently ofy. For the prompt component, the double ratio of theχc1(3872) andψ(2S) production cross-sections between 13 and 8 TeV is observed to be consistent with unity, independent ofpTand centre-of-mass energy.</jats:p
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