Flavor dependence of charged pion fragmentation functions
H. Bhatt (Mississippi State University, Mississippi State, MS, 39762, USA); P. Bosted (The College of William & Mary, Williamsburg, VA, 23185, USA); S. Jia (Temple University, Philadelphia, PA, 19122, USA); W. Armstrong (Argonne National Laboratory, Lemont, IL, 60439, USA); D. Dutta (Mississippi State University, Mississippi State, MS, 39762, USA)
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We have measured the flavor dependence of multiplicities for and production in semi-inclusive deep-inelastic scattering (SIDIS) on proton and deuteron to explore a possible charge symmetry violation in fragmentation functions. The experiment used an electron beam with energies of 10.2 and 10.6 GeV at Jefferson Lab and the Hall-C spectrometers. The electron kinematics spanned the range , GeV 2, and GeV. The pion fractional momentum range was , and the transverse momentum range was GeV/c. Assuming factorization and allowing for isospin breaking, the results can be described by two “favored” and two “unfavored” effective low fragmentation functions that are flavor-dependent. We find each pair converges to a common flavor-independent fragmentation function at the highest W, where factorization is most applicable.
