Number Density Interpretation of Dihadron Fragmentation Functions

Pitonyak, D.; Cocuzza, C.; Metz, A.; Prokudin, A.; Sato, N.

doi:10.1103/PhysRevLett.132.011902

Number Density Interpretation of Dihadron Fragmentation Functions

Journal Article · Thu Jan 04 00:00:00 EST 2024 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.132.011902· OSTI ID:2278752

; Cocuzza, C.; ; Prokudin, A.; Sato, N.

We present a new quantum field-theoretic definition of fully unintegrated dihadron fragmentation functions (DiFFs) as well as a generalized version for $n$ -hadron fragmentation functions. We demonstrate that this definition allows certain sum rules to be satisfied, making it consistent with a number density interpretation. Moreover, we show how our corresponding so-called extended DiFFs that enter existing phenomenological studies are number densities and also derive their evolution equations. Within this new framework, DiFFs extracted from experimental measurements will have a clear physical meaning.

Published by the American Physical Society 2024

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Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 2278752

Alternate ID(s):: OSTI ID: 2278704

Report Number(s):: DOE/OR/23177--6204; JLAB-THY-23--3826; arXiv:2305.11995; 011902

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 132; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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