Transverse momentum dependent feed-down fractions for bottomonium production

Abstract

We extract transverse momentum dependent feed-down fractions for bottomonium production using a data-driven approach. We use data published by the ATLAS, CMS, and LHCb Collaborations for sqrt(s) = 7 TeV proton-proton collisions. Based on this collected data, we produce fits to the differential cross sections for the production of both S- and P-wave bottomonium states. Combining these fits with branching ratios for excited state decays from the Particle Data Group, we compute the feed-down fractions for both the Upsilon(1S) and Upsilon(2S) as a function of transverse momentum. Our results indicate a strong dependence on transverse momentum, which is consistent with prior extractions of the feed-down fractions. When evaluated at the average momentum of the states, we find that approximately 75% of Upsilon(1S) and Upsilon(2S) states are produced directly. Our results for the transverse momentum dependent feed-down fractions are provided in tabulated form so that they can be used by other research groups.

10 pages, 6 figures, 5 tables, and associated data files; v2 - published version

References in corpus (23)

• Static quark-antiquark pairs at finite temperature
• Real and imaginary-time $Q\bar{Q}$ correlators in a thermal medium
• Heavy quark master equations in the Lindblad form at high temperatures
• Non-relativistic bound states at finite temperature (I): the hydrogen atom
• Bottomonium suppression using a lattice QCD vetted potential
• Coupled Boltzmann Transport Equations of Heavy Quarks and Quarkonia in Quark-Gluon Plasma
• Open Quantum Systems for Quarkonia
• Quarkonium Semiclassical Transport in Quark-Gluon Plasma: Factorization and Quantum Correction
• Extraction of the Heavy-Quark Potential from Bottomonium Observables in Heavy-Ion Collisions
• Measurement of the azimuthal anisotropy of ${\rm Y}$(1S) and ${\rm Y}$(2S) mesons in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Bottomonium suppression and elliptic flow from real-time quantum evolution
• Regeneration of bottomonia in an open quantum systems approach
• ${\rm Y}$ production and nuclear modification at forward rapidity in Pb-Pb collisions at $\sqrt{{\text{s}}_{\text{NN}}}=5.02$ TeV
• Upsilon production in U+U collisions at 193 GeV with the STAR experiment
• Measurement of the production cross section ratio sigma(chi[b2](1P)) / sigma(chi[b1](1P)) in pp collisions at sqrt(s) = 8 TeV
• Inclusive production of $J/\psi$, $\psi (2S)$, and ${\rm Y}$ states in pNRQCD
• Bottomonium suppression and elliptic flow using Heavy Quarkonium Quantum Dynamics
• Phenomenological study of quarkonium suppression and the impact of the energy gap between singlets and octets
• QTRAJ 1.0: A Lindblad equation solver for heavy-quarkonium dynamics
• Production of ${\rm Y}(\text{nS})$ mesons in Pb+Pb and $pp$ collisions at 5.02 TeV
• The impact of fluctuating initial conditions on bottomonium suppression in 5.02 TeV heavy-ion collisions
• Bottomonium suppression in PbPb collision at energies available at the CERN large hadron collider
• Bottomonium suppression at RHIC and LHC in an open quantum system approach

Cited by in corpus (1)

• Overview of high-density QCD studies with the CMS experiment at the LHC