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Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data.

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Title: Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data.
Authors: Mokeev, V.I.1 (AUTHOR) mokeev@jlab.org, Burkert, V.D.1 (AUTHOR), Carman, D.S.1 (AUTHOR), Elouadrhiri, L.1 (AUTHOR), Golovatch, E.2 (AUTHOR), Gothe, R.W.3 (AUTHOR), Hicks, K.4 (AUTHOR), Ishkhanov, B.S.2 (AUTHOR), Isupov, E.L.2 (AUTHOR), Joo, K.5 (AUTHOR), Markov, N.1,5 (AUTHOR), Pasyuk, E.1 (AUTHOR), Trivedi, A.3 (AUTHOR)
Source: Physics Letters B. Jun2020, Vol. 805, pN.PAG-N.PAG. 1p.
Subjects: Differential cross sections, Resonance, Particles (Nuclear physics), Hadronic atoms, Baryons
Abstract: The analysis of the nine 1-fold differential cross sections for the γ r , v p → 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 Q 2 -independent resonance masses and hadronic decay widths in the Q 2 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 π Δ and ρp final states and the different Q 2 -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 Q 2 -evolution of the photo-/electrocouplings have become available. These results are important for the exploration of the nature of the "missing" baryon resonances. [ABSTRACT FROM AUTHOR]
Copyright of Physics Letters B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Evidence for the N′(1720)3/2+ nucleon resonance from combined studies of CLAS π+π−p photo- and electroproduction data.
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  Data: <searchLink fieldCode="AR" term="%22Mokeev%2C+V%2EI%2E%22">Mokeev, V.I.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mokeev@jlab.org</i><br /><searchLink fieldCode="AR" term="%22Burkert%2C+V%2ED%2E%22">Burkert, V.D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Carman%2C+D%2ES%2E%22">Carman, D.S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Elouadrhiri%2C+L%2E%22">Elouadrhiri, L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Golovatch%2C+E%2E%22">Golovatch, E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gothe%2C+R%2EW%2E%22">Gothe, R.W.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hicks%2C+K%2E%22">Hicks, K.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ishkhanov%2C+B%2ES%2E%22">Ishkhanov, B.S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Isupov%2C+E%2EL%2E%22">Isupov, E.L.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Joo%2C+K%2E%22">Joo, K.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Markov%2C+N%2E%22">Markov, N.</searchLink><relatesTo>1,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pasyuk%2C+E%2E%22">Pasyuk, E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Trivedi%2C+A%2E%22">Trivedi, A.</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Physics+Letters+B%22">Physics Letters B</searchLink>. Jun2020, Vol. 805, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Differential+cross+sections%22">Differential cross sections</searchLink><br /><searchLink fieldCode="DE" term="%22Resonance%22">Resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Particles+%28Nuclear+physics%29%22">Particles (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Hadronic+atoms%22">Hadronic atoms</searchLink><br /><searchLink fieldCode="DE" term="%22Baryons%22">Baryons</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The analysis of the nine 1-fold differential cross sections for the γ r , v p → 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 Q 2 -independent resonance masses and hadronic decay widths in the Q 2 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 π Δ and ρp final states and the different Q 2 -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 Q 2 -evolution of the photo-/electrocouplings have become available. These results are important for the exploration of the nature of the "missing" baryon resonances. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Physics Letters B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.physletb.2020.135457
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      – SubjectFull: Differential cross sections
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      – SubjectFull: Resonance
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      – SubjectFull: Particles (Nuclear physics)
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