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Two Pion Photo- and Electroproduction with CLAS

Journal Article · · EPJ Web of Conferences (Online)
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Exclusive π+π-p photo- and electroproduction data from CLAS have considerably extended the information on the spectrum and structure of nucleon resonances. The data from the π+π-p and Nπ channels have provided results on the electrocouplings of most resonances in the mass region up to 1.8 GeV and at photon virtualities up to 5.0 GeV2. The recent CLAS data on π+π-p photoproduction have improved knowledge on the photocouplings of nucleon resonances in the mass range of 1.6 GeV < MN* < 2.0 GeV and on their decays to the πΔ and ρp final hadron states. Analyses of the combined π+π-p photo- and electroproduction data have revealed evidence for the candidate-state N’(1720)3/2+. The new results on the nucleon resonance spectrum, electroexcitation amplitudes from analysis of the CLAS π+π-p photo- and electroproduction data, and their impact on the exploration of strong QCD are presented.
Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
CLAS Collaboration
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1708834
Alternate ID(s):
OSTI ID: 23175080
Report Number(s):
JLAB-PHY-19-3036; DOE/OR/23177-4787
Journal Information:
EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 241; ISSN 2100-014X
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (7)

Nucleon and $${\Delta}$$ Δ Elastic and Transition Form Factors journal October 2014
Electromagnetic $${\varvec{N}}^{\varvec{*}}$$ N ∗ Transition Form Factors in the ANL-Osaka Dynamical Coupled-Channels Approach journal March 2018
Nucleon Resonance Structure from Exclusive Meson Electroproduction with CLAS journal April 2018
$$N^*$$ N ∗ form Factors Based on a Covariant Quark Model journal June 2018
Electroexcitation of Nucleon Resonances in a Light-Front Relativistic Quark Model journal June 2018
Measurement of New Observables from the $$\pi ^{+}\pi ^{-}p$$ π + π - p Electroproduction Off the Proton: Reaction: $$ep \rightarrow e'p'\pi ^{+}\pi ^{-}$$ e p → e ′ p ′ π + π - $$Q^{2}=[2.0, 5.0]$$ Q 2 = [ 2.0 , 5.0 ] GeV2 $$W=[1.400, 2.125]$$ W = [ 1.400 , 2.125 ] GeV journal November 2018
Strong Evidence for Nucleon Resonances near 1900 MeV journal August 2017

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS