Flavor Dependence of Charged Pion Fragmentation Functions
Abstract
We have measured the flavor dependence of multiplicities for pi^+ and pi^- production in semi-inclusive deep-inelastic scattering (SIDIS) on proton and deuteron targets 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 0.3<x<0.6, 2<Q^2<5.5 GeV^2, and 4<W^2<11 GeV^2. The pion fractional momentum range was 0.3< z <0.7, and the transverse momentum range was 0<p_T<0.25 GeV/c. Assuming factorization at low p_T and allowing for isospin breaking, we find that the results can be described by two "favored" and two "un-favored" effective low fragmentation functions that are flavor-dependent. However, they converge to a common flavor-independent value at the lowest x or highest W of this experiment.
Cite
@article{arxiv.2408.16640,
title = {Flavor Dependence of Charged Pion Fragmentation Functions},
author = {H. Bhatt and P. Bosted and S. Jia and W. Armstrong and D. Dutta and R. Ent and D. Gaskell and E. Kinney and H. Mkrtchyan and S. Ali and R. Ambrose and D. Androic and C. Ayerbe Gayoso and A. Bandari and V. Berdnikov and D. Bhetuwal and D. Biswas and M. Boer and E. Brash and A. Camsonne and J. P. Chen and J. Chen and M. Chen and E. M. Christy and S. Covrig and S. Danagoulian and M. Diefenthaler and B. Duran and M. Elaasar and C. Elliot and H. Fenker and E. Fuchey and J. O. Hansen and F. Hauenstein and T. Horn and G. M. Huber and M. K. Jones and M. L. Kabir and A. Karki and B. Karki and S. J. D. Kay and C. Keppel and V. Kumar and N. Lashley-Colthirst and W. B. Li and D. Mack and S. Malace and P. Markowitz and M. McCaughan and E. McClellan and D. Meekins and R. Michaels and A. Mkrtchyan and G. Niculescu and I. Niculescu and B. Pandey and S. Park and E. Pooser and M. Rehfuss and B. Sawatzky and G. R. Smith and H. Szumila-Vance and A. S. Tadepalli and V. Tadevosyan and R. Trotta and H. Voskanyan and S. A. Wood and Z. Ye and C. Yero and X. Zheng},
journal= {arXiv preprint arXiv:2408.16640},
year = {2024}
}
Comments
6 pages, 3 figures with 11 pages of supplementary material which has 9 figures