A fragmentation-based study of heavy quark production

Abstract

Processes involving heavy quarks are a crucial component of the LHC physics program, both by themselves and as backgrounds for Higgs physics and new physics searches. In this work, we critically reconsider the validity of the widely-adopted approximation in which heavy quarks are generated at the matrix-element level, with special emphasis on the impact of the collinear logarithms associated with final-state heavy quark and gluon splittings. Our study, based on a perturbative fragmentation-function approach, explicitly shows that neglecting the resummation of collinear logarithms may yield inaccurate predictions, in particular when observables exclusive in the heavy quark degrees of freedom are considered. Our findings motivate the use of schemes which encompass the resummation of final-state collinear logarithms.

34 pages, 9 figures. v2: Minor revision suggested by JHEP implemented

References in corpus (19)

• QCDNUM: Fast QCD Evolution and Convolution
• Assault on the NLO Wishlist: pp -> tt bb
• Higgs boson production in association with top quarks in the POWHEG BOX
• Next-to-leading-order predictions for t-channel single-top production at hadron colliders
• Next-to-Next-to-Leading Order Evolution of Non-Singlet Fragmentation Functions
• Higgs production in association with bottom quarks
• Standard Model Higgs boson pair production in the $(b\bar{b})(b\bar{b})$ final state
• On Third-Order Timelike Splitting Functions and Top-Mediated Higgs Decay into Hadrons
• QCD corrections to the hadronic production of a heavy quark pair and a W-boson including decay correlations
• Triple Higgs boson production to six $b$-jets at a 100 TeV proton collider
• Simulating $b$-associated production of $Z$ and Higgs bosons with SHERPA
• NLO QCD corrections to Z b anti-b production with massive bottom quarks at the Fermilab Tevatron
• Multi-jet merging in a variable flavor number scheme
• Hadroproduction of $t\bar{t}b\bar{b}$ final states at LHC: predictions at NLO accuracy matched with Parton Shower
• Associated production of charged Higgs bosons and top quarks with POWHEG
• Reference results for time-like evolution up to $\mathcal{O}({\alpha }_s^3)$
• NLO QCD predictions for $t\bar{t}b\bar{b}$ production in association with a light jet at the LHC
• Fitting the b-quark PDF as a massive-b scheme: Higgs production in bottom fusion
• Electroweak Gauge-Boson Production in Association with b Jets at Hadron Colliders

Cited by in corpus (15)

• Inclusive production of a heavy-light dijet system in hybrid high-energy and collinear factorization
• B-hadron hadro-production in NNLO QCD: application to LHC $t\bar{t}$ events with leptonic decays
• Measurements of the production cross-section for a $Z$ boson in association with $b$-jets in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Soft logarithms in processes with heavy quarks
• A consistent resummation of mass and soft logarithms in processes with heavy flavours
• Signals with six bottom quarks for charged and neutral Higgs bosons
• NNLO B-fragmentation fits and their application to $t\bar{t}$ production and decay at the LHC
• High-energy QCD dynamics from bottom flavor fragmentation at the Hi-Lumi LHC
• Next-to-next-to-leading order event generation for $VH$ production with $H\to b\bar{b}$ decay
• Bottomoniumlike states in proton collisions: Fragmentation and resummation
• Resummation effects in the bottom-quark fragmentation function
• Heavy Quark Fragmentation in $e^{+}{e}^{-}$ Collisions to NNLO+NNLL Accuracy in Perturbative QCD
• An improved description of charm fragmentation data
• Search for new physics using effective field theory in 13 TeV pp collision events that contain a top quark pair and a boosted Z or Higgs boson
• Measurement of cross-sections for production of a $Z$ boson in association with a flavor-inclusive or doubly $b$-tagged large-radius jet in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment