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measurement of the p e e π n reaction close to threshold and at low q 2

Authors: M. Schoth; B. S. Schlimme; A. G. Denig; Anselm Esser; M. Mihovilovič; M. Mihovilovič; S. Širca; +18 Authors

measurement of the p e e π n reaction close to threshold and at low q 2

Abstract

The cross section of the $p(e,e'��^+)n$ reaction has been measured for five kinematic settings at an invariant mass of $W = 1094$ MeV and for a four-momentum transfer of $Q^2 = 0.078$ (GeV/$c$)$^2$. The measurement has been performed at MAMI using a new short-orbit spectrometer (SOS) of the A1 collaboration, intended for detection of low-energy pions. The transverse and longitudinal cross section terms were separated using the Rosenbluth method and the transverse-longitudinal interference term has been determined from the left-right asymmetry. The experimental cross section terms are compared with the calculations of three models: DMT2001, MAID2007 and $��$MAID. The results show that we do not yet understand the dynamics of the fundamental pion.

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Country
Croatia
Keywords

Nuclear and High Energy Physics, Physics, QC1-999, FOS: Physical sciences, NATURAL SCIENCES. Physics., PRIRODNE ZNANOSTI. Fizika., Electroproduction experiments, Low-energy pions, Short-orbit spectrometer ; Low-energy pions ; Electroproduction experiments, Nuclear Experiment (nucl-ex), Nuclear Experiment, Short-orbit spectrometer, lcsh: lcsh:QC1-999, lcsh: lcsh:Physics

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
Green
gold