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

CLAS Collaboration

doi:10.1016/j.physletb.2018.10.013

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

CLAS Collaboration

Physics

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	371-379
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	788
Early online date	12 Oct 2018
DOIs	https://doi.org/10.1016/j.physletb.2018.10.013
Publication status	Published - 10 Jan 2019

Bibliographical note

Keywords

Baryon state
Resonance photocouplings
Two pion photoproduction

Access to Document

10.1016/j.physletb.2018.10.013

1-s2.0-S0370269318307779-main
©2018 The Author
Final published version, 642 KBLicence: CC BY

Cite this

@article{2b8a53157b184c60ab1026346f50c3ab,

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 M. 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 N. Zachariou",

note = "{\textcopyright}2018 The Author",

year = "2019",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2018.10.013",

language = "English",

volume = "788",

pages = "371--379",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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TY - JOUR

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, M.

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 - Zachariou, N.

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

UR - http://www.scopus.com/inward/record.url?scp=85057560868&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2018.10.013

DO - 10.1016/j.physletb.2018.10.013

M3 - Article

AN - SCOPUS:85057560868

SN - 0370-2693

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

ER -

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