Theses and Dissertations
ORCID
https://orcid.org/my-orcid?orcid=0000-0003-0087-5387
Advisor
Dutta, Dipangkar
Committee Member
Gaskell, Dave
Committee Member
Dunne, James A.
Committee Member
Winger, Jeff A.
Committee Member
Crider, Ben P.
Date of Degree
5-10-2024
Original embargo terms
Visible MSU only 6 month
Document Type
Dissertation - Campus Access Only
Major
Physics
Degree Name
Doctor of Philosophy (Ph.D)
College
College of Arts and Sciences
Department
Department of Physics and Astronomy
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. We used a 10.6 GeV electron beam at Jefferson Lab, and 4 msr solid angle spectrometers (HMS for electrons, SHMS for pions), the lepton vertex spanned the kinematic range $0.3 < x < 0.6$, $2 < Q^2 < 5$ GeV$^2$, and $4 < W^2 < 11$ GeV$^2$. The pion fractional momentum range was $0.3 < z < 0.7$ and the small transverse momentum range was $0 < P_t < .25$ GeV. We used the multiplicities to form sum-and-difference ratios, testing the validity of factorization. We extracted two favored and two unfavored $W$ dependent fragmentation functions (FFs) from these multiplicities. Assuming factorization at low $P_t$, we find that the two ``favored" FFs allow for isospin breaking (charge symmetry violation) at low $W$, while converging to a common value at the highest $W$ of this experiment. The two unfavored FFs are consistent with each other within the experimental uncertainties.
Recommended Citation
Bhatt, Hem Datt, "A study of charge symmetry violation in fragmentation functions extracted from semi-inclusive electroproduction of charged pions from protons and deuterons" (2024). Theses and Dissertations. 6081.
https://scholarsjunction.msstate.edu/td/6081