Production of Y(1S) Mesons from chib Decays in pp(bar) Collisions at sqrt(s)=1.8 TeV

Abstract

We have reconstructed the radiative decays ${\chi }_b(1P)\to {\rm Y}(1S)\gamma$ and ${\chi }_b(2P)\to {\rm Y}(1S)\gamma$ in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV, and measured the fraction of ${\rm Y}(1S)$ mesons that originate from these decays. For ${\rm Y}(1S)$ mesons with $p_T^{{\rm Y}}>8.0$ GeV/$c$, the fractions that come from ${\chi }_b(1P)$ and ${\chi }_b(2P)$ decays are $(27.1\pm 6.9(stat)\pm 4.4(sys))$ and $(10.5\pm 4.4(stat)\pm 1.4(sys))$, respectively. We have derived the fraction of directly produced ${\rm Y}(1S)$ mesons to be $(50.9\pm 8.2(stat)\pm 9.0(sys))$.

13 Pages, 2 figures

Cited by in corpus (73)

• Heavy quarkonium: progress, puzzles, and opportunities
• Quarkonium Feed-Down and Sequential Suppression
• Observation of sequential Upsilon suppression in PbPb collisions
• Colour Deconfinement and Quarkonium Binding
• Suppression of non-prompt J/psi, prompt J/psi, and Y(1S) in PbPb collisions at sqrt(sNN) = 2.76 TeV
• Charmonium and bottomonium production in heavy-ion collisions
• Upsilon production at the Tevatron and the LHC
• Suppression of Upsilon excited states in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV
• Thermal Bottomonium Suppression at RHIC and LHC
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Bottomonia in the Quark-Gluon Plasma and their Production at RHIC and LHC
• On the mechanisms of heavy-quarkonium hadroproduction
• Quarkonia in the Quark Gluon Plasma
• New Observables in Inclusive Production of Quarkonia
• Thermal Upsilon(1s) and chi_b1 suppression in sqrt(s_NN)=2.76 TeV Pb-Pb collisions at the LHC
• Suppression of Upsilon Production in d+Au and Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Observation of a new chi_b state in radiative transitions to Upsilon(1S) and Upsilon(2S) at ATLAS
• Heavy-flavor production and medium properties in high-energy nuclear collisions - What next?
• Measurement of Upsilon production in 7 TeV pp collisions at ATLAS
• NRQCD Analysis of Bottomonium Production at the Tevatron
• Measurement of Upsilon production in pp collisions at \sqrt{s} = 7 TeV
• Heavy-Quarkonium Production in High Energy Proton-Proton Collisions at RHIC
• Small x Phenomenology - summary of the 3rd Lund Small x Workshop in 2004
• Complete next-to-leading-order study on the yield and polarization of Upsilon(1S,2S,3S) at the Tevatron and LHC
• Bottomonium Production at RHIC and LHC
• Upsilon Production as a Probe for Early State Dynamics in High Energy Nuclear Collisions at RHIC
• Heavy-ion collisions at the Large Hadron Collider: a review of the results from Run 1
• Double heavy meson production through double parton scattering in hadronic collisions
• Measurement of ${\rm Y}$(1S+2S+3S) production in $p$$+$$p$ and Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Hard probes in heavy ion collisions at the LHC: heavy flavour physics
• Measurement of inclusive differential cross sections for Upsilon(1S) production in p-pbar collisions at sqrt(s) = 1.96 TeV
• Real next-to-next-to-leading-order QCD corrections to J/psi and Upsilon hadroproduction in association with a photon
• QCD corrections to Upsilon production via color-octet states at the Tevatron and LHC
• Bottomonia suppression in heavy-ion collisions
• Upsilon suppression in PbPb collisions at the LHC
• Inelastic J/psi and Upsilon hadroproduction
• Gluodissociation and Screening of Upsilon States in PbPb Collisions at sqrt (s_NN) = 2.76 TeV
• Polarization of Upsilon(nS) at the Tevatron
• Quarkonium production in high energy proton-proton and proton-nucleus collisions
• Bottomium suppression in PbPb collisions at LHC energies
• Inclusive production of $J/\psi$ meson in proton-proton collisions at BNL RHIC
• Recent Results in Bottomonium
• Measurement of the Upsilon(1S) Production Cross-Section in pp Collisions at sqrt(s) = 7 TeV in ATLAS
• Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$
• Υ Production in Heavy Ion Collisions at LHC
• In-medium P-wave quarkonium from the complex lattice QCD potential
• Predictions for the sPHENIX physics program
• Deep inelastic $J/\psi$ production at HERA in the $k_T$-factorization approach and its consequences for the nonrelativistic QCD
• Quarkonia Production in Hot and Cold Matters
• Observation of chi_c and chi_b nuclear suppression via dilepton polarization measurements
• Prompt heavy quarkonium production in association with a massive (anti)bottom quark at the LHC
• The influence of the Chi_b(3P) state on the decay cascade of bottomium in PbPb collisions at LHC energies
• Upsilonium polarization as a touchstone in understanding the proton dynamics in QCD
• Hadronic decays of ${\mathbf{\chi }}_{\mathbf{bJ}}$ into light bottom squarks
• Questions and prospects in quarkonium polarization measurements from proton-proton to nucleus-nucleus collisions
• J/psi and Upsilon Polarization in Hadronic Production Processes
• Quarkonia at finite temperature in relativistic heavy ion collisions
• Suppression of bottomonia states in finite size quark gluon plasma in PbPb collisions at Large Hadron Collider
• Excited State Contributions to the Heavy Baryon Fragmentation Functions in a Quark-Diquark Model
• Upsilon production in pp and pA collisions: from RHIC to the LHC
• Production of bottomonia states in proton+proton and heavy-ion collisions
• $J/\psi$ and $\psi$(2S) polarization in proton-proton collisions at energies available at the CERN Large Hadron Collider using PYTHIA8
• Associated production of ${\rm Y}(1S)W$ at LHC in next-to-leading order QCD
• Review of Physics Results from the Tevatron: Heavy Flavor Physics
• Bottomonia in the Quark Gluon Plasma
• Suppression of quarkonia in PbPb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV
• Quarkonium measurements in Pb-Pb and p-Pb collisions with ALICE at the LHC
• Bottomonia Hadroproduction
• Comover Enhancement of Quarkonium Production
• Quarkonium Suppression
• Quarkonia and heavy-flavour production in CMS
• Quarkonium Results in PbPb Collisions at CMS
• Higgs Boson Searches via Dileptonic Bottomonium Decays