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Title Deep exclusive electroproduction of $p^0$ at high $Q^2$ in the quark valence regime
Authors Mongi Dlamini,Bishnu Karki,Salina Ali,P-J. Lin,Frederic Georges,Ho San Ko,Norman Israel,Mohamed Nuhman Hashir Rashad,A. Stefanko
JLAB number JLAB-PHY-21-3308
LANL number arXiv:2011.11125
Other number DOE/OR/23177-5114
Document Type(s) (Journal Article) 
Associated with EIC: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)

Compiled for arXiv
Publication 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.
Experiment Numbers: E12-06-114
Group: Hall A
Document: pdf
Accepted Manuscript:
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