Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data
The analysis of the nine 1-fold differential cross sections for the γr,vp→π+π−p photo- and electroproduction reactions obtained with the CLAS detector at Jefferson Laboratory was carried out with the goal to establish the contributing resonances in the mass range from 1.6 GeV to 1.8 GeV. In order to...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-06-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320302616 |
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| author | V.I. Mokeev V.D. Burkert D.S. Carman L. Elouadrhiri E. Golovatch R.W. Gothe K. Hicks B.S. Ishkhanov E.L. Isupov K. Joo N. Markov E. Pasyuk A. Trivedi |
| author_facet | V.I. Mokeev V.D. Burkert D.S. Carman L. Elouadrhiri E. Golovatch R.W. Gothe K. Hicks B.S. Ishkhanov E.L. Isupov K. Joo N. Markov E. Pasyuk A. Trivedi |
| author_sort | V.I. Mokeev |
| collection | DOAJ |
| description | The analysis of the nine 1-fold differential cross sections for the γr,vp→π+π−p photo- and electroproduction reactions obtained with the CLAS detector at Jefferson Laboratory was carried out with the goal to establish the contributing resonances in the mass range from 1.6 GeV to 1.8 GeV. In order to describe the photo- and electroproduction data with Q2-independent resonance masses and hadronic decay widths in the Q2 range below 1.5 GeV2, it was found that an N′(1720)3/2+ state is required in addition to the already well-established nucleon resonances. This work demonstrates that the combined studies of π+π−p photo- and electroproduction data are vital for the observation of this resonance. The contributions from the N′(1720)3/2+ state and the already established N(1720)3/2+ state with a mass of 1.745 GeV are well separated by their different hadronic decays to the πΔ and ρp final states and the different Q2-evolution of their photo-/electroexcitation amplitudes. The N′(1720)3/2+ state is the first recently established baryon resonance for which the results on the Q2-evolution of the photo-/electrocouplings have become available. These results are important for the exploration of the nature of the “missing” baryon resonances. |
| first_indexed | 2024-12-13T05:30:42Z |
| format | Article |
| id | doaj.art-d9180af69a714fbbba01d5cb952315dc |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-13T05:30:42Z |
| publishDate | 2020-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-d9180af69a714fbbba01d5cb952315dc2022-12-21T23:58:05ZengElsevierPhysics Letters B0370-26932020-06-01805Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction dataV.I. Mokeev0V.D. Burkert1D.S. Carman2L. Elouadrhiri3E. Golovatch4R.W. Gothe5K. Hicks6B.S. Ishkhanov7E.L. Isupov8K. Joo9N. Markov10E. Pasyuk11A. Trivedi12Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; Corresponding author.Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USASkobeltsyn Institute of Nuclear Physics and Physics Department, Lomonosov Moscow State University, 119234 Moscow, RussiaUniversity of South Carolina, Columbia, SC 29208, USAOhio University, Athens, OH 45701, USASkobeltsyn Institute of Nuclear Physics and Physics Department, Lomonosov Moscow State University, 119234 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics and Physics Department, Lomonosov Moscow State University, 119234 Moscow, RussiaUniversity of Connecticut, Storrs, CT 06269, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; University of Connecticut, Storrs, CT 06269, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAUniversity of South Carolina, Columbia, SC 29208, USAThe analysis of the nine 1-fold differential cross sections for the γr,vp→π+π−p photo- and electroproduction reactions obtained with the CLAS detector at Jefferson Laboratory was carried out with the goal to establish the contributing resonances in the mass range from 1.6 GeV to 1.8 GeV. In order to describe the photo- and electroproduction data with Q2-independent resonance masses and hadronic decay widths in the Q2 range below 1.5 GeV2, it was found that an N′(1720)3/2+ state is required in addition to the already well-established nucleon resonances. This work demonstrates that the combined studies of π+π−p photo- and electroproduction data are vital for the observation of this resonance. The contributions from the N′(1720)3/2+ state and the already established N(1720)3/2+ state with a mass of 1.745 GeV are well separated by their different hadronic decays to the πΔ and ρp final states and the different Q2-evolution of their photo-/electroexcitation amplitudes. The N′(1720)3/2+ state is the first recently established baryon resonance for which the results on the Q2-evolution of the photo-/electrocouplings have become available. These results are important for the exploration of the nature of the “missing” baryon resonances.http://www.sciencedirect.com/science/article/pii/S0370269320302616Two pion productionResonance couplingsMissing resonances |
| spellingShingle | V.I. Mokeev V.D. Burkert D.S. Carman L. Elouadrhiri E. Golovatch R.W. Gothe K. Hicks B.S. Ishkhanov E.L. Isupov K. Joo N. Markov E. Pasyuk A. Trivedi Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data Physics Letters B Two pion production Resonance couplings Missing resonances |
| title | Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data |
| title_full | Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data |
| title_fullStr | Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data |
| title_full_unstemmed | Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data |
| title_short | Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data |
| title_sort | evidence for the n 1720 3 2 nucleon resonance from combined studies of clas π π p photo and electroproduction data |
| topic | Two pion production Resonance couplings Missing resonances |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320302616 |
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