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Title: Deep exclusive {pi}{sup +} electroproduction off the proton at CLAS

Abstract

The exclusive electroproduction of {pi}{sup +} above the resonance region was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory by scattering a 6 GeV continuous electron beam off a hydrogen target. The large acceptance and good resolution of CLAS, together with the high luminosity, allowed us to measure the cross section for the {gamma}* p {yields} n {pi}{sup +} process in 140 (Q{sup 2}, x{sub B}, t) bins: 0.16<x{sub B}<0.58, 1.6 GeV{sup 2}<Q{sup 2}<4.5 GeV{sup 2} and 0.1 GeV{sup 2}<-t<5.3 GeV{sup 2}. For most bins, the statistical accuracy is on the order of a few percent. Differential cross sections are compared to two theoretical models, based either on hadronic (Regge phenomenology) or on partonic (handbag diagram) degrees of freedom. Both can describe the gross features of the data reasonably well, but differ strongly in their ingredients. If the handbag approach can be validated in this kinematical region, our data contain the interesting potential to experimentally access transversity Generalized Parton Distributions.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1067325
Report Number(s):
JLAB-PHY-12-1608; DOE/OR/23177-2234; arXiv:1206.2326
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Journal Name:
The European Physical Journal A
Additional Journal Information:
Journal Volume: 49
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Park, Kijun, Gothe, Ralf, Guidal, Michel, Laget, Jean, Adhikari, K P, Bennet, R P, Biselli, A S, Chandavar, S, MacGregor, I. J. D, Munoz Camacho, C, Anefalos-Pereira, S, Rimal, D, and Tang, W. Deep exclusive {pi}{sup +} electroproduction off the proton at CLAS. United States: N. p., 2013. Web. doi:10.1140/epja/i2013-13016-9.
Park, Kijun, Gothe, Ralf, Guidal, Michel, Laget, Jean, Adhikari, K P, Bennet, R P, Biselli, A S, Chandavar, S, MacGregor, I. J. D, Munoz Camacho, C, Anefalos-Pereira, S, Rimal, D, & Tang, W. Deep exclusive {pi}{sup +} electroproduction off the proton at CLAS. United States. https://doi.org/10.1140/epja/i2013-13016-9
Park, Kijun, Gothe, Ralf, Guidal, Michel, Laget, Jean, Adhikari, K P, Bennet, R P, Biselli, A S, Chandavar, S, MacGregor, I. J. D, Munoz Camacho, C, Anefalos-Pereira, S, Rimal, D, and Tang, W. 2013. "Deep exclusive {pi}{sup +} electroproduction off the proton at CLAS". United States. https://doi.org/10.1140/epja/i2013-13016-9.
@article{osti_1067325,
title = {Deep exclusive {pi}{sup +} electroproduction off the proton at CLAS},
author = {Park, Kijun and Gothe, Ralf and Guidal, Michel and Laget, Jean and Adhikari, K P and Bennet, R P and Biselli, A S and Chandavar, S and MacGregor, I. J. D and Munoz Camacho, C and Anefalos-Pereira, S and Rimal, D and Tang, W},
abstractNote = {The exclusive electroproduction of {pi}{sup +} above the resonance region was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory by scattering a 6 GeV continuous electron beam off a hydrogen target. The large acceptance and good resolution of CLAS, together with the high luminosity, allowed us to measure the cross section for the {gamma}* p {yields} n {pi}{sup +} process in 140 (Q{sup 2}, x{sub B}, t) bins: 0.16<x{sub B}<0.58, 1.6 GeV{sup 2}<Q{sup 2}<4.5 GeV{sup 2} and 0.1 GeV{sup 2}<-t<5.3 GeV{sup 2}. For most bins, the statistical accuracy is on the order of a few percent. Differential cross sections are compared to two theoretical models, based either on hadronic (Regge phenomenology) or on partonic (handbag diagram) degrees of freedom. Both can describe the gross features of the data reasonably well, but differ strongly in their ingredients. If the handbag approach can be validated in this kinematical region, our data contain the interesting potential to experimentally access transversity Generalized Parton Distributions.},
doi = {10.1140/epja/i2013-13016-9},
url = {https://www.osti.gov/biblio/1067325}, journal = {The European Physical Journal A},
number = ,
volume = 49,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2013},
month = {Tue Jan 01 00:00:00 EST 2013}
}