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Title: Kinematics of current region fragmentation in semi-inclusive deeply inelastic scattering

Different kinematical regions of semi-inclusive deeply inelastic scattering (SIDIS) processes correspond to different underlying partonic pictures, and it is important to understand the transition between them. We find criteria in semi-inclusive deeply inelastic scattering (SIDIS) for identifying the current fragmentation region — the kinematical region where a factorization picture with fragmentation functions is appropriate, especially for studies of transverse-momentum-dependent (TMD) functions. This region is distinguished from the central (soft) and target fragmentation regions. The basis of our argument is in the errors in approximations used in deriving factorization. As compared with previous work, we show that it is essential to take account of the transverse momentum of the detected hadron, and we find a much more restricted range for genuine current fragmentation. As a result, we show that it is important to develop an extended factorization formulation to treat hadronization in the central region, as well as the current and target fragmentation regions, and to obtain a unified formalism spanning all rapidities for the detected hadron.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [5]
  1. Univ. di Torino, Torino (Italy)
  2. Pennsylvania State Univ., University Park, PA (United States)
  3. Pennsylvania State Univ. Berks, Reading, PA (United States)
  4. Old Dominion Univ., Norfolk, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  5. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Report Number(s):
JLAB-THY-16-2389; DOE/OR/23177-4012; arXiv:1611.10329
Journal ID: ISSN 0370-2693; PII: S037026931730028X; TRN: US1700980
Grant/Contract Number:
AC05-06OR23177; FG02-07ER41460; SC0013699; TO-Call3-2012-0103
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 766; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; semi-inclusive deep inelastic scattering; perturbative QCD; factorization theorems; current fragmentation
OSTI Identifier:
1343160
Alternate Identifier(s):
OSTI ID: 1340277