Fragmentation inside an identified jet
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Stewart_Fragmentation inside.pdf
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Author(s)
Procura, Massimiliano
Stewart, Iain
Date Issued
August 2010
Journal
Proceedings of the IX International Conference on Quark Confinement and the Hadron Spectrum, QCHS IX, Madrid, Spain, 30 August-3 September 2010
Publisher
American Institute of Physics
Citation
Procura, Massimiliano, and Iain W. Stewart. “Fragmentation Inside an Identified Jet.”
in Proceedings of the IX INTERNATIONAL CONFERENCE ON QUARK CONFINEMENT AND THE HADRON SPECTRUM—QCHS IX, 30 August–3 September 2010, Madrid, (Spain), 2011. 424–426. Web. (AIP Conf. Proc. 1343)
Version
Author's final manuscript
Abstract
Using Soft‐Collinear Effective Theory (SCET) we derive factorization formulae for semi‐inclusive processes where a light hadron h fragments from a jet whose invariant mass is measured. Our analysis yields a novel “fragmenting jet function” Gih(s,z) that depends on the jet invariant mass √s, and on the fraction z of the large light‐cone momentum components of the hadron and the parent parton i. We show that Gih(s,z) can be computed in terms of perturbatively calculable coefficients, Jij(s,z/x), integrated against standard non‐perturbative fragmentation functions, Djh(x). Our analysis yields a simple replacement rule that allows any factorization theorem depending on a jet function Ji to be converted to a semi‐inclusive process with a fragmenting hadron h.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1063/1.3575050
