Measurement of Upsilon production in pp collisions at \sqrt{s} = 7 TeV

Abstract

The production of Upsilon(1S), Upsilon(2S) and Upsilon(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s)=7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb-1 collected at the Large Hadron Collider. The Upsilon mesons are reconstructed in the decay mode Upsilon -> mu+ mu- and the signal yields are extracted from a fit to the mu+ mu- invariant mass distributions. The differential production cross-sections times dimuon branching fractions are measured as a function of the Upsilon transverse momentum pT and rapidity y, over the range pT < 15 GeV/c and 2.0 < y < 4.5. The cross-sections times branching fractions, integrated over these kinematic ranges, are measured to be sigma(pp -> Upsilon(1S) X) x B(Upsilon(1S)->mu+ mu-) = 2.29 {\pm} 0.01 {\pm} 0.10 -0.37 +0.19 nb, sigma(pp -> Upsilon(2S) X) x B(Upsilon(2S)->mu+ mu-) = 0.562 {\pm} 0.007 {\pm} 0.023 -0.092 +0.048 nb, sigma(pp -> Upsilon(3S) X) x B(Upsilon(3S)->mu+ mu-) = 0.283 {\pm} 0.005 {\pm} 0.012 -0.048 +0.025 nb, where the first uncertainty is statistical, the second systematic and the third is due to the unknown polarisation of the three Upsilon states.

22 pages, 7 figures

References in corpus (11)

• PYTHIA 6.4 Physics and Manual
• J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD
• QCD corrections to J/psi and Upsilon production at hadron colliders
• Upsilon production at the Tevatron and the LHC
• Observation of anomalous Upsilon(1S)pi+pi- and Upsilon(2S)pi+pi- production near the Upsilon(5S) resonance
• Heavy flavor in heavy-ion collisions at RHIC and RHIC II
• Observation of a new chi_b state in radiative transitions to Upsilon(1S) and Upsilon(2S) at ATLAS
• Absolute luminosity measurements with the LHCb detector at the LHC
• Measurement of the polarization of the ${\rm Y}(1S)$ and ${\rm Y}(2S)$ states in $p\bar{p}$ collisions at $\sqrt{s}=$1.96 TeV
• Measurement of the Upsilon(1S) Production Cross-Section in pp Collisions at sqrt(s) = 7 TeV in ATLAS
• Measurement of the inclusive phi cross-section in pp collisions at sqrt(s) = 7 TeV

Cited by in corpus (63)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• QCD and strongly coupled gauge theories: challenges and perspectives
• Implications of LHCb measurements and future prospects
• Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton-nucleus collisions
• Inclusive Dark Photon Search at LHCb
• Color Screening and Regeneration of Bottomonia in High-Energy Heavy-Ion Collisions
• New Observables in Inclusive Production of Quarkonia
• Heavy quark pair production in high energy pA collisions: Quarkonium
• Measurement of the Y(1S), Y(2S), and Y(3S) polarizations in pp collisions at sqrt(s) = 7 TeV
• Forward $J/\psi$ production in proton-nucleus collisions at high energy
• Measurement of Upsilon production in 7 TeV pp collisions at ATLAS
• Quarkonium production in the LHC era: a polarized perspective
• Complete next-to-leading-order study on the yield and polarization of Upsilon(1S,2S,3S) at the Tevatron and LHC
• Suppression of ${\rm Y}$(1S) at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Production of inclusive ${\rm Y}$(1S) and ${\rm Y}$(2S) in p-Pb collisions at $\sqrt{{\mathbf{s}}_{\mathrm{NN}}}=5.02$ TeV
• Measurement of quarkonium production cross sections in pp collisions at $\sqrt{s}=$ 13 TeV
• Measurement of the Y(1S), Y(2S), and Y(3S) cross sections in pp collisions at sqrt(s) = 7 TeV
• Heavy Quarkonium Production at Low Pt in NRQCD with Soft Gluon Resummation
• Measurement of ${\rm Y}$(1S+2S+3S) production in $p$$+$$p$ and Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Production and polarization of prompt $J/\psi$ in the improved color evaporation model using the $k_T$-factorization approach
• Production of associated ${\rm Y}$ and open charm hadrons in $pp$ collisions at $\sqrt{s}=7$ and $8$TeV via double parton scattering
• Double-quarkonium production at a fixed-target experiment at the LHC (AFTER@LHC)
• Measurement of ${\rm Y}$ production in $pp$ collisions at $\sqrt{s}$= 13 TeV
• Forward production of ${\rm Y}$ mesons in $pp$ collisions at $\sqrt{s}=7$ and 8TeV
• Impact of heavy quark and quarkonium data on nuclear gluon PDFs
• An Updated Study for ${\rm Y}$ Production and Polarization at the Tevatron and LHC
• ${\rm Y}$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Using the Tsallis distribution for hadron spectra in $pp$ collisions: Pions and quarkonia at $\sqrt{s}$ = 5--13000 GeV
• Measurements of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) differential cross sections in pp collisions at sqrt(s) = 7 TeV
• ${\rm Y}$ production and nuclear modification at forward rapidity in Pb-Pb collisions at $\sqrt{{\text{s}}_{\text{NN}}}=5.02$ TeV
• Linearly polarized gluons in charmonium and bottomonium production in color octet model
• Measurement of Upsilon production in pp collisions at sqrt{s}=2.76 TeV
• Recent Results in Bottomonium
• Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$
• Measurement of the ${\rm Y}$ polarizations in $pp$ collisions at $\sqrt{s}$=7 and 8TeV
• ${\rm Y}$ production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 8.16 TeV
• $\psi (2S)$ and ${\rm Y}(3S)$ hadroproduction in the parton Reggeization approach: Yield, polarization, and the role of fragmentation
• Production and polarization of prompt ${\rm Y}$($n$S) in the improved color evaporation model using the $k_T$-factorization approach
• Prospects for improving the LHC W boson mass measurement with forward muons
• B-meson production in the Parton Reggeization Approach at Tevatron and the LHC
• Inclusive quarkonium production in pp collisions at $\sqrt{s}=5.02$ TeV
• Forward Heavy Quarkonium Productions at the LHC
• Models of $J/\Psi$ photo-production reactions on the nucleon
• Prompt Upsilon(nS) production at the LHC in the Regge limit of QCD
• ${\rm Y}$-meson pair production at LHC
• Review of QCD, Quark-Gluon Plasma, Heavy Quark Hybrids, and Heavy Quark State production in p-p and A-A collisions
• Systematic study of the experimental measurements on ratios of different ${\rm Y}$ states
• Quarkonium production in nuclear collisions
• Upsilon Production In pp Collisions For Forward Rapidities At LHC
• Review of bottomonium measurements from CMS
• Bottomonium sequential suppression and strong heavy-quark potential in heavy-ion collisions
• Nuclear effects in photoproduction of heavy quarks and vector mesons in ultraperipheral PbPb and pPb collisions at the LHC
• Production of associated ${\chi }_b$ and open charm at the LHC
• Upsilon production in pp and pA collisions: from RHIC to the LHC
• Feasibility studies for quarkonium production at a fixed-target experiment using the LHC proton and lead beams (AFTER@LHC)
• Production of bottomonia states in proton+proton and heavy-ion collisions
• Quarkonium production at collider energies in Small-$x$ formalism
• Bottomonium transport in p-Pb and Pb-Pb collisions at the LHC
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
• Pair production of heavy quarkonia in the color evaporation model
• Upsilon Production in Pb-Pb and p-Pb Collisions at Forward Rapidity with ALICE at the LHC
• Bottomonia production in p+p collisions under NRQCD formalism
• ALICE results on quarkonium production in pp, p-Pb and Pb-Pb collisions