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New results from the studies of the Ν (1440) 1/2+, Ν (1520) 3/2–, and Δ (1620) 1/2– resonances in exclusive ep → e'p'π+π– electroproduction with the CLAS detector

Journal Article · · Physical Review C
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [6];  [4];  [4];  [3]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Moscow State Univ., Moscow (Russia)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Univ. of South Carolina, Columbia, SC (United States); Moscow State Univ., Moscow (Russia)
  4. Moscow State Univ., Moscow (Russia)
  5. Univ. of South Carolina, Columbia, SC (United States)
  6. Ohio Univ., Athens, OH (United States)
+ Show Author Affiliations
In this study, the transition helicity amplitudes from the proton ground state to the N(1440)1/2+, N(1520)3/2–, and Δ(1620)1/2– resonances (γvpN* electrocouplings) were determined from the analysis of nine independent onefold differential π+π–p electroproduction cross sections off a proton target, taken with CLAS at photon virtualities 0.5GeV2 < Q2 < 1.5 GeV2. The phenomenological reaction model employed for separation of the resonant and nonresonant contributions to this exclusive channel was further developed.
Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI ID:
1239646
Alternate ID(s):
OSTI ID: 1239456
Report Number(s):
DOE/OR/23177--3552; JLAB-PHY--15-2137; arXiv:1509.05460
Journal Information:
Physical Review C, Journal Name: Physical Review C Journal Issue: 2 Vol. 93; ISSN PRVCAN; ISSN 2469-9985
Publisher:
APSCopyright Statement
Country of Publication:
United States
Language:
English

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Measurement of the polarized structure function σ LT ′ for p ( e → , e ′ p ) π 0 in the Δ ( 1232 ) resonance region journal September 2003
Measurement of the polarized structure function σ L T ′ for p ( e ⃗ , e ′ π + ) n in the Δ ( 1232 ) resonance region journal October 2004
Electroexcitation of the P 33 ( 1232 ) , P 11 ( 1440 ) , D 13 ( 1520 ) , and S 11 ( 1535 ) at Q 2 = 0.4 and 0.65 ( GeV / c ) 2 journal January 2005
Electroexcitation of nucleon resonances at Q 2 = 0 . 65 ( GeV / c ) 2 from a combined analysis of single- and double-pion electroproduction data journal October 2005
Single π + electroproduction on the proton in the first and second resonance regions at 0.25 GeV 2 < Q 2 < 0.65 GeV 2 journal February 2006
Separated structure functions for the exclusive electroproduction of K + Λ and K + Σ 0 final states journal April 2007
Q 2 dependence of the S 11 ( 1535 ) photocoupling and evidence for a P -wave resonance in η electroproduction journal July 2007
Cross sections and beam asymmetries for e → p → e n π + in the nucleon resonance region for 1 . 7 ⩽ Q 2 ⩽ 4 . 5 GeV 2 journal January 2008
Dynamical coupled-channels effects on pion photoproduction journal April 2008
Polarized structure function σ LT ' for H 1 ( e → , e ' K + ) Λ in the nucleon resonance region journal June 2008
First measurement of target and double spin asymmetries for e → p → → ep π 0 in the nucleon resonance region above the Δ ( 1232 ) journal October 2008
Electroproduction of p π + π − off protons at 0 . 2 < Q 2 < 0 . 6 GeV 2 and 1 . 3 < W < 1 . 57 GeV with the CLAS detector journal January 2009
Beam-recoil polarization transfer in the nucleon resonance region in the exclusive e → p → e ' K + Λ → and e → p → e ' K + Σ → 0 reactions at the CLAS spectrometer journal June 2009
Dynamical coupled-channels analysis of H 1 ( e , e ′ π ) N reactions journal August 2009
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Double and single pion photoproduction within a dynamical coupled-channels model journal December 2009
Extraction of electromagnetic transition form factors for nucleon resonances within a dynamical coupled-channels model journal October 2010
Nucleon electromagnetic form factors and electroexcitation of low-lying nucleon resonances in a light-front relativistic quark model journal May 2012
Experimental study of the P 11 ( 1440 ) and D 13 ( 1520 ) resonances from the CLAS data on e p → e ′ π + π − p ′ journal September 2012
Systematic study of longitudinal and transverse helicity amplitudes in the hypercentral constituent quark model journal December 2012
Separated structure functions for exclusive K + Λ and K + Σ 0 electroproduction at 5.5 GeV measured with CLAS journal February 2013
Electromagnetic transition form factors of the Roper resonance in a phenomenological field theory journal July 2014
Induced polarization of Λ ( 1116 ) in kaon electroproduction journal September 2014
Measurements of e p → e ′ π + n at 1.6 < W < 2.0  GeV and extraction of nucleon resonance electrocouplings at CLAS journal April 2015
Extracting meson-baryon contributions to the electroexcitation of the N ( 1675 ) 5 2 − nucleon resonance journal July 2015
Unitary analytic isobar model for the reaction nucleon-meson to nucleon-meson-meson journal June 1978
Multichannel resonance parametrization of π N scattering amplitudes journal June 1992
Valence quark contributions for the γ N → P 11 ( 1440 ) form factors journal April 2010
Nucleon to delta electromagnetic transition in the Dyson-Schwinger approach journal May 2012
Electromagnetic structure of the nucleon and the Roper resonance in a light-front quark approach journal January 2014
γ * N → N * ( 1520 ) form factors in the spacelike region journal May 2014
Light-cone distribution amplitudes of the nucleon and negative parity nucleon resonances from lattice QCD journal May 2014
γ * N → N * ( 1520 ) transition form factors in light cone QCD sum rules journal November 2014
Double-Regge exchange limit for the γ p → K + K − p reaction journal February 2015
Electroproduction of the N * ( 1535 ) nucleon resonance in QCD journal July 2015
Electroproduction of the N * ( 1535 ) Resonance at Large Momentum Transfer journal August 2009
Revealing Dressed Quarks via the Proton’s Charge Distribution journal September 2013
Completing the Picture of the Roper Resonance journal October 2015
Q 2 Dependence of Quadrupole Strength in the γ * p → Δ + ( 1232 ) → p π 0 Transition journal March 2002
First Measurement of Transferred Polarization in the Exclusive e → p → e ′ K + Λ → Reaction journal April 2003
Measurement of e p → e ′ p π + π − and Baryon Resonance Analysis journal July 2003
Measurement of the N → Δ + ( 1232 ) Transition at High-Momentum Transfer by π 0 Electroproduction journal September 2006
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Isobar channels in the production of π+π− pairs on a proton by virtual photons journal March 2007
Pion electro-production in the Roper region in chiral quark models journal October 2009
Effects of a spin-flavour-dependent interaction on light-flavoured baryon helicity amplitudes journal January 2013
A chiral quark model for meson electroproduction in the region of D-wave resonances journal September 2013
Electromagnetic excitation of nucleon resonances journal September 2011
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Study of Excited Nucleons and Their Structure journal January 2014
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Study of Excited Nucleons and Their Structure journal January 2014
Studies of n* Structure from the clas Meson Electroproduction data journal January 2014
Review of Particle Physics text January 2012
Review of Particle Physics text January 2018
Dynamical Coupled-Channels Effects on Pion Photoproduction text January 2007
Nucleon Resonance Electrocouplings from the CLAS Meson Electroproduction Data text January 2011
Effects of a spin-flavour dependent interaction on light-flavoured baryon helicity amplitudes text January 2012
Status of Dynamical Coupled-Channel Analysis by Collaboration@EBAC text January 2012
A chiral quark model for meson electro-production in the region of D-wave resonances text January 2013
Electromagnetic structure of the nucleon and the Roper resonance in a light-front quark approach text January 2013
Study of excited nucleons and their structure text January 2013
Explanation and Prediction of Observables using Continuum Strong QCD text January 2013
Extracting meson-baryon contributions to the electroexcitation of the $N(1675){\frac{5}{2}}^-$ nucleon resonance text January 2014
The unquenched quark model text January 2015
Completing the picture of the Roper resonance text January 2015
Understanding the nucleon as a Borromean bound-state text January 2015
Systematic study of longitudinal and transverse helicity amplitudes in the hypercentral Constituent Quark Model text January 2015
Review of Particle Physics text January 2008

Cited By (28)

Baryons and the Borromeo journal August 2016
$$N^*$$ N ∗ Structure and Strong QCD journal May 2018
Valence-Quark Structure of N* Resonances from DSEs journal May 2018
Spectrum of Light- and Heavy-Baryons journal April 2019
Spectroscopy of light ${{N^*}}$ baryons journal March 2019
Nucleon resonance contributions to unpolarized inclusive electron scattering journal September 2019
Exclusive π 0 p electroproduction off protons in the resonance region at photon virtualities 0.4 GeV 2 ≤ Q 2 ≤ 1 GeV 2 journal January 2020
Dissecting nucleon transition electromagnetic form factors journal October 2016
Measurements of e p → e ′ π + π − p ′ cross sections with CLAS at 1.40 GeV < W < 2.0 GeV and 2.0 GeV 2 < Q 2 < 5.0 GeV 2 journal August 2017
Measurements of the γ v p → p ′ π + π − cross section with the CLAS detector for 0.4 GeV 2 < Q 2 < 1.0 GeV 2 and 1.3 GeV < W < 1.825 GeV journal August 2018
Transition form factors: γ * + p → Δ ( 1232 ) , Δ ( 1600 ) journal August 2019
Spectrum and structure of octet and decuplet baryons and their positive-parity excitations journal September 2019
Transition form factors and helicity amplitudes for electroexcitation of negative and positive parity nucleon resonances in a light-front quark model journal November 2019
Low- Q 2 empirical parametrizations of the N * helicity amplitudes journal December 2019
Studying the P c ( 4450 ) resonance in J / ψ photoproduction off protons journal August 2016
Semirelativistic approximation to the γ * N → N ( 1520 ) and γ * N → N ( 1535 ) transition form factors journal March 2017
Analytic parametrizations of the γ * N → N ( 1440 ) form factors inspired by light-front holography journal September 2017
Valence quark contributions for the γ * N → N ( 1440 ) form factors from light-front holography journal February 2018
Electromagnetic structure of nucleon and Roper in soft-wall AdS/QCD journal March 2018
γ * γ → η , η ′ transition form factors journal January 2019
Nucleon-to-Roper electromagnetic transition form factors at large Q 2 journal February 2019
Beam-Recoil Polarization Measurement of π 0 Electroproduction on the Proton in the Region of the Roper Resonance journal July 2017
Colloquium : Roper resonance: Toward a solution to the fifty year puzzle journal March 2019
Baryons and the Borromeo text January 2016
Dissecting nucleon transition electromagnetic form factors text January 2016
Electromagnetic structure of nucleon and Roper in soft-wall AdS/QCD text January 2017
Spectroscopy of light $N^{*}$ baryons text January 2018
Transition form factors and helicity amplitudes for electroexcitation of negative- and positive parity nucleon resonances in a light-front quark model text January 2019

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