Bottom-quark fragmentation: comparing results from tuned event generators and resummed calculations

Abstract

We study bottom-quark fragmentation in e+e- annihilation, top and Higgs decay H -> b bbar, using Monte Carlo event generators, as well as calculations, based on the formalism of perturbative fragmentation functions, which resum soft- and collinear-radiation effects in the next-to-leading logarithmic approximation. We consider the PYTHIA and HERWIG generators, and implement matrix-element corrections to the parton shower simulation of the H -> b bbar process in HERWIG. We tune the Kartvelishvili, string and cluster models to B-hadron data from LEP and SLD, and present results in both x_B and moment spaces. The B-hadron spectra yielded by HERWIG, PYTHIA and resummed calculations show small discrepancies, which are due to the different approaches and models employed and to the quality of the fits to the e+e- data.

22 pages, 11 colour figures. Minor changes in the text, published version

References in corpus (24)

• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• Matching NLO QCD computations and parton shower simulations
• Transverse-Momentum-Ordered Showers and Interleaved Multiple Interactions
• New formalism for QCD parton showers
• Study of the fragmentation of b quarks into B mesons at the Z peak
• Matrix-Element Corrections to Parton Shower Algorithms
• QCD analysis of first b cross section data at 1.96 TeV
• QCD Radiation off Heavy Particles
• Is There a Significant Excess in Bottom Hadroproduction at the Tevatron?
• Soft-Gluon Resummation for the Fragmentation of Light and Heavy Quarks at Large x
• W Production in an Improved Parton-Shower Approach
• Inclusive Analysis of the b Quark Fragmentation Function in Z Decays at LEP
• Perturbative Heavy Quark Fragmentation Function through O(alpha_s^2)
• Initial State Radiation in Simulations of Vector Boson Production at Hadron Colliders
• Precise measurement of the b-quark fragmentation function in Z0 boson decays
• Top mass determination in leptonic final states with J/psi
• Matrix Element Corrections to Parton Shower Simulations of Heavy Quark Decay
• Herwig++ 1.0: An Event Generator for e+e- Annihilation
• Heavy-Quark Fragmentation
• Bottom Quark Fragmentation in Top Quark Decay
• Soft-Gluon Resummation for Bottom Fragmentation in Top Quark Decay
• Properties of Soft Radiation Near and $W^{+}{W}^{-}$ Threshold
• Fragmentation in H->b bbar Processes
• Matrix-Element Corrections to Parton Shower Simulations for Higgs Hadroproduction

Cited by in corpus (17)

• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Determination of the top quark mass circa 2013: methods, subtleties, perspectives
• B-hadron hadro-production in NNLO QCD: application to LHC $t\bar{t}$ events with leptonic decays
• Quarkonium production in high energy proton-proton and proton-nucleus collisions
• Fragmentation Uncertainties in Hadronic Observables for Top-quark Mass Measurements
• NNLO B-fragmentation fits and their application to $t\bar{t}$ production and decay at the LHC
• Angular-ordered parton showers with medium-modified splitting functions
• QCD threshold corrections to Higgs decay and to hadroproduction in $l^{+}{l}^{-}$ annihilation
• Modelling non-perturbative corrections to bottom-quark fragmentation
• A Phenomenological Study of Bottom Quark Fragmentation in Top Quark Decay
• Measurement of $b$-quark fragmentation properties in jets using the decay $B^{\pm }\to J/\psi K^{\pm }$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD
• Measurement of the top-quark mass using a leptonic invariant mass in $pp$ collisions at $\sqrt{s}=13\text{TeV}$ with the ATLAS detector
• Charm-quark fragmentation with an effective coupling constant
• Measurement of the Forward-Backward Asymmetry in the Production of $B^{\pm }$ Mesons in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV
• The relative yields of heavy hadrons as function of transverse momentum at LHC experiments
• Hadronization systematics and top mass reconstruction