Study of ${\chi }_b$ meson production in pp collisions at $\sqrt{s}=7$ and 8TeV and observation of the decay ${\chi }_b\to {\rm Y}(3S)\gamma$

Abstract

A study of ${\chi }_b$ meson production at LHCb is performed on proton-proton collision data, corresponding to 3.0fb${}^{-1}$ of integrated luminosity collected at centre-of-mass energies $\sqrt{s}=7$ and 8TeV. The fraction of ${\rm Y}(nS)$ mesons originating from ${\chi }_b$ decays is measured as a function of the ${\rm Y}$ transverse momentum in the rapidity range $2.0<y^{{\rm Y}}<4.5$. The radiative transition of the ${\chi }_b(3P)$ meson to ${\rm Y}(3S)$ is observed for the first time. The ${\chi }_{b1}(3P)$ mass is determined to be $$m({\chi }_{b1}(3P))=10511.3\pm 1.7\pm 2.5MeV/c^2,$$ where the first uncertainty is statistical and the second is systematic.

22 pages, 3 fugurs

References in corpus (11)

• PYTHIA 6.4 Physics and Manual
• QCD corrections to J/psi and Upsilon production at hadron colliders
• Upsilon production at the Tevatron and the LHC
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• Evidence for the decay $X(3872)\to \psi (2S)\gamma$
• Measurement of the ratio of prompt ${\chi }_c$ to $J/\psi$ production in $pp$ collisions at $\sqrt{s}=7$ TeV
• Measurement of the relative prompt production rate of chi(c2) and chi(c1) in pp collisions at sqrt(s) = 7 TeV
• Measurement of ${\rm Y}$ production in $pp$ collisions at $\sqrt{s}$= 13 TeV
• Measurement of chi_c1 and chi_c2 production with sqrt(s) = 7 TeV pp collisions at ATLAS
• Production of ${\chi }_b$-mesons at LHC
• Measurement of Upsilon production in pp collisions at sqrt{s}=2.76 TeV

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