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Publication Information
Title Deep exclusive electroproduction of $p^0$ at high $Q^2$ in the quark valence regime
Abstract We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of $x_B$ (0.36, 0.48 and 0.60) and $Q^2$ (3.1 to 8.4 GeV$^2$) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding structure functions $d\sigma_L/dt+\epsilon d\sigma_T/dt$, $d\sigma_{TT}/dt$, $d\sigma_{LT}/dt$ and $d\sigma_{LT'}/dt$ are extracted as a function of the proton momentum transfer $t-t_{min}$. The results suggest the amplitude for transversely polarized virtual photons continues to dominate the cross-section throughout this kinematic range. The data are well described by calculations based on transversity Generalized Parton Distributions coupled to a helicity flip Distribution Amplitude of the pion, thus providing a unique way to probe the structure of the nucleon.
Author(s) Mongi Dlamini, Bishnu Karki, Salina Ali, P.-J. Lin, Frederic Georges, Ho San Ko, Norman Israel, Mohamed Nuhman Hashir Rashad, A. Stefanko
Publication Date October 2021
Document Type Journal Article
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Exp Nuclear Physics / Experimental Halls / Hall A
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-PHY-21-3308 OSTI Number: 1824170
LANL Number: arXiv:2011.11125 Other Number: DOE/OR/23177-5114
Associated with an experiment Yes
Experiment Number(s)
E12-06-114
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Physical Review Letters
Refereed Yes
Volume 127
Issue
Page(s) 152301
Attachments/Datasets/DOI Link
Document(s)
2011.11125.pdf (STI Document)
PhysRevLett.127.152301.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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