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First glances at the transversity parton distribution through dihadron fragmentation functions
Alessandro Bacchetta1, Aurore Courtoy, Marco Radici
1Dipartimento di Fisica Nucleare e Teorica, Università di Pavia, Italy. alessandro.bacchetta@unipv.it
Physical Review Letters
|July 30, 2011
Summary
We report the first measurements of transversity parton distributions using pion-pair production in deep-inelastic scattering. This study determines transversity using collinear factorization and electron-positron annihilation data.
Area of Science:
- Particle Physics
- Quantum Chromodynamics
- High-Energy Physics
Background:
- Transversity parton distribution functions (PDFs) are crucial for understanding the spin structure of the nucleon.
- Experimental access to transversity PDFs has been limited due to technical challenges.
Purpose of the Study:
- To present the first determination of the transversity parton distribution.
- To explore the applicability of collinear factorization in analyzing transversity.
Main Methods:
- Analysis of pion-pair production in deep-inelastic scattering (DIS) off transversely polarized targets.
- Utilizing dihadron fragmentation functions (FFs) extracted from electron-positron annihilation data.
- Employing the framework of collinear factorization for the extraction of transversity PDFs.
Main Results:
- First observational data on the transversity parton distribution.
- Successful application of a novel method for transversity extraction.
Conclusions:
- This study provides the first experimental determination of the transversity parton distribution.
- The results validate the use of collinear factorization and dihadron fragmentation functions in DIS experiments.
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