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Related Experiment Video

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Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy

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Charged hadron fragmentation functions from collider data: NNPDF Collaboration.

V Bertone^1,2, N P Hartland^1,2, E R Nocera³

¹1Department of Physics and Astronomy, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands.

The European Physical Journal. C, Particles and Fields

|September 11, 2018

Summary

This summary is machine-generated.

This study introduces NNFF1.1h, a refined calculation of charged-hadron fragmentation functions (FFs). Hadron collider data confirms previous findings and improves constraints on gluon fragmentation functions.

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Area of Science:

High Energy Physics
Quantum Chromodynamics
Particle Physics

Background:

Fragmentation functions (FFs) describe how quarks and gluons transform into hadrons.
Previous FF determinations primarily relied on electron-positron annihilation data.
Uncertainties in FFs impact precision physics calculations.

Purpose of the Study:

To present NNFF1.1h, a new determination of unidentified charged-hadron fragmentation functions (FFs) and their uncertainties.
To incorporate experimental data from proton-(anti)proton collisions at the Tevatron and LHC.
To constrain the gluon fragmentation function more precisely.

Main Methods:

Analysis performed at next-to-leading order in perturbative quantum chromodynamics.
Constraining a set of FFs originally determined from electron-positron annihilation data using hadron-collider measurements.
Utilizing transverse-momentum distributions for charged-hadron production.

Main Results:

Hadron-collider data is consistent with electron-positron annihilation data.
The new data significantly constrains the gluon fragmentation function.
Results verified for reliability against kinematic cut choices and previous determinations (NNFF1.0).

Conclusions:

The NNFF1.1h determination provides a more precise understanding of charged-hadron fragmentation.
Incorporating hadron-collider data enhances the accuracy of FFs, particularly for gluons.
The findings validate the consistency of different experimental datasets and theoretical frameworks.