Hadron Fragmentation Inside Jets in Hadronic Collisions

Abstract

We present an analytical next-to-leading order QCD calculation of the partonic cross sections for the process $pp\to (\text{jet}h)X$, for which a specific hadron is observed inside a fully reconstructed jet. In order to obtain the analytical results, we assume the jet to be relatively narrow. We show that the results can be cast into a simple and systematic form based on suitable universal jet functions for the process. We confirm the validity of our calculation by comparing to previous results in the literature for which the next-to-leading order cross section was treated entirely numerically by Monte-Carlo integration techniques. We present phenomenological results for experiments at the LHC and at RHIC. These suggest that $pp\to (\text{jet}h)X$ should enable very sensitive probes of fragmentation functions, especially of the one for gluons.

27 pages, 9 figures. Some additions and new comparisons to data. Version to appear in Physical Review D

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• Asymmetric jet clustering in deep-inelastic scattering
• Probing Transverse-Momentum Dependent Evolution With Groomed Jets
• Analytic and Monte Carlo Studies of Jets with Heavy Mesons and Quarkonia
• Jet angularity measurements for single inclusive jet production
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• Spin asymmetries in electron-jet production at the future electron ion collider
• $J/\psi$ production and polarization within a jet
• A Fragmentation Approach to Jet Flavor
• Testing the universality of the Collins function in pion-jet production at RHIC
• Fragmentation Functions Beyond Fixed Order Accuracy
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• Multidifferential study of identified charged hadron distributions in $Z$-tagged jets in proton-proton collisions at $\sqrt{s}=$13 TeV
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• Automated calculation of Jet fragmentation at NLO in QCD
• Access to Photon Fragmentation Functions in Hadronic Jet Production
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• EFT for Soft Drop Double Differential Cross Section
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• Hadron-in-jet production at partonic threshold
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• Polarized fragmenting jet functions in Inclusive and Exclusive Jet Production
• QCD factorization and universality of jet cross sections in heavy-ion collisions
• Direct- and Resolved-Photon Threshold Resummation for Polarized High-$p_T$ Hadron Production at COMPASS
• Semi-inclusive jet cross sections within SCET
• Semi-Inclusive Jet Functions and Jet Substructure in $J_{E_T}^{(I)}$ and $J_{E_T}^{(II)}$ Algorithms
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• Transverse momentum asymmetry in the semi-inclusive electron positron annihilation process
• Hadronization effects on transverse momentum dependent jet fragmentation function in small systems