First results on nucleon resonance photocouplings from the γp → π+πp reaction

CLAS Collaboration

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report the first experimental measurements of the nine 1-fold differential cross sections for the γp→π+πp reaction, obtained with the CLAS detector at Jefferson Laboratory. The measurements cover the invariant mass range of the final state hadrons from 1.6 GeV <W< 2.0 GeV. For the first time the photocouplings of all prominent nucleon resonances in this mass range have been extracted from this exclusive channel. Photoproduction of two charged pions is of particular importance for the evaluation of the photocouplings for the Δ(1620)1/2, Δ(1700)3/2, N(1720)3/2+, and Δ(1905)5/2+ resonances, which have dominant decays into the ππN final states rather than the more extensively studied single meson decay channels.

Original languageEnglish (US)
Pages (from-to)371-379
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume788
DOIs
StatePublished - Jan 10 2019

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decay
photoproduction
hadrons
pions
mesons
evaluation
detectors
cross sections

Keywords

  • Baryon state
  • Resonance photocouplings
  • Two pion photoproduction

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

First results on nucleon resonance photocouplings from the γp → π+πp reaction. / CLAS Collaboration.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 788, 10.01.2019, p. 371-379.

Research output: Contribution to journalArticle

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title = "First results on nucleon resonance photocouplings from the γp → π+π−p reaction",
abstract = "We report the first experimental measurements of the nine 1-fold differential cross sections for the γp→π+π−p reaction, obtained with the CLAS detector at Jefferson Laboratory. The measurements cover the invariant mass range of the final state hadrons from 1.6 GeV <W< 2.0 GeV. For the first time the photocouplings of all prominent nucleon resonances in this mass range have been extracted from this exclusive channel. Photoproduction of two charged pions is of particular importance for the evaluation of the photocouplings for the Δ(1620)1/2−, Δ(1700)3/2−, N(1720)3/2+, and Δ(1905)5/2+ resonances, which have dominant decays into the ππN final states rather than the more extensively studied single meson decay channels.",
keywords = "Baryon state, Resonance photocouplings, Two pion photoproduction",
author = "{CLAS Collaboration} and E. Golovatch and Burkert, {V. D.} and Carman, {D. S.} and Gothe, {R. W.} and K. Hicks and Ishkhanov, {B. S.} and Mokeev, {V. I.} and E. Pasyuk and S. Adhikari and Z. Akbar and Amaryan, {M. J.} and H. Avakian and J. Ball and L. Barion and M. Bashkanov and M. Battaglieri and I. Bedlinskiy and Biselli, {A. S.} and S. Boiarinov and Briscoe, {W. J.} and F. Cao and A. Celentano and P. Chatagnon and T. Chetry and G. Ciullo and L. Clark and Clary, {B. A.} and Cole, {P. L.} and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and M. Defurne and A. Deur and S. Diehl and C. Djalali and Michael Dugger and R. Dupre and H. Egiyan and M. Ehrhart and {El Alaoui}, A. and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and R. Fersch and A. Filippi and Y. Ghandilyan",
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T1 - First results on nucleon resonance photocouplings from the γp → π+π−p reaction

AU - CLAS Collaboration

AU - Golovatch, E.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Gothe, R. W.

AU - Hicks, K.

AU - Ishkhanov, B. S.

AU - Mokeev, V. I.

AU - Pasyuk, E.

AU - Adhikari, S.

AU - Akbar, Z.

AU - Amaryan, M. J.

AU - Avakian, H.

AU - Ball, J.

AU - Barion, L.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Cao, F.

AU - Celentano, A.

AU - Chatagnon, P.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Clary, B. A.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Defurne, M.

AU - Deur, A.

AU - Diehl, S.

AU - Djalali, C.

AU - Dugger, Michael

AU - Dupre, R.

AU - Egiyan, H.

AU - Ehrhart, M.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fersch, R.

AU - Filippi, A.

AU - Ghandilyan, Y.

PY - 2019/1/10

Y1 - 2019/1/10

N2 - We report the first experimental measurements of the nine 1-fold differential cross sections for the γp→π+π−p reaction, obtained with the CLAS detector at Jefferson Laboratory. The measurements cover the invariant mass range of the final state hadrons from 1.6 GeV <W< 2.0 GeV. For the first time the photocouplings of all prominent nucleon resonances in this mass range have been extracted from this exclusive channel. Photoproduction of two charged pions is of particular importance for the evaluation of the photocouplings for the Δ(1620)1/2−, Δ(1700)3/2−, N(1720)3/2+, and Δ(1905)5/2+ resonances, which have dominant decays into the ππN final states rather than the more extensively studied single meson decay channels.

AB - We report the first experimental measurements of the nine 1-fold differential cross sections for the γp→π+π−p reaction, obtained with the CLAS detector at Jefferson Laboratory. The measurements cover the invariant mass range of the final state hadrons from 1.6 GeV <W< 2.0 GeV. For the first time the photocouplings of all prominent nucleon resonances in this mass range have been extracted from this exclusive channel. Photoproduction of two charged pions is of particular importance for the evaluation of the photocouplings for the Δ(1620)1/2−, Δ(1700)3/2−, N(1720)3/2+, and Δ(1905)5/2+ resonances, which have dominant decays into the ππN final states rather than the more extensively studied single meson decay channels.

KW - Baryon state

KW - Resonance photocouplings

KW - Two pion photoproduction

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U2 - 10.1016/j.physletb.2018.10.013

DO - 10.1016/j.physletb.2018.10.013

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VL - 788

SP - 371

EP - 379

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

ER -