Differential cross section measurements for gamma n -> pi(-)p above the first nucleon resonance region

Academic Article

Abstract

  • The quasi-free $\gamma d\to\pi^{-}p(p)$ differential cross section has been measured with CLAS at photon beam energies $E_\gamma$ from 0.445 GeV to 2.510 GeV (corresponding to $W$ from 1.311 GeV to 2.366 GeV) for pion center-of-mass angles $\cos\theta_\pi^{c.m.}$ from -0.72 to 0.92. A correction for final state interactions has been applied to this data to extract the $\gamma n\to\pi^-p$ differential cross sections. These cross sections are quoted in 8428 $(E_\gamma,\cos\theta_\pi^{c.m.})$ bins, a factor of nearly three increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of $N^*$ resonances and extract their properties. Selected photon decay amplitudes $N^* \to \gamma n$ at the resonance poles are determined for the first time and are reported here.
  • Authors

  • Mattione, PT
  • Carman, DS
  • Strakovsky, II
  • Workman, RL
  • Kudryavtsev, AE
  • Svarc, A
  • Tarasov, VE
  • Adhikari, KP
  • Adhikari, S
  • Adikaram, D
  • Akbar, Z
  • Pereira, S Anefalos
  • Ball, J
  • Baltzell, NA
  • Bashkanov, M
  • Battaglieri, M
  • Batourine, V
  • Bedlinskiy, I
  • Biselli, AS
  • Boiarinov, S
  • Briscoe, WJ
  • Burkert, VD
  • Cao, T
  • Celentano, A
  • Charles, G
  • Chetry, T
  • Ciullo, G
  • Clark, L
  • Cole, PL
  • Contalbrigo, M
  • Cortes, O
  • Crede, V
  • D'Angelo, A
  • Dashyan, N
  • De Vita, R
  • De Sanctis, E
  • Defurne, M
  • Deur, A
  • Djalali, C
  • Dugger, M
  • Dupre, R
  • Egiyan, H
  • El Alaoui, A
  • El Fassi, L
  • Eugenio, P
  • Fedotov, G
  • Fersch, R
  • Filippi, A
  • Fleming, JA
  • Fradi, A
  • Ghandilyan, Y
  • Gilfoyle, GP
  • Giovanetti, KL
  • Girod, FX
  • Gleason, C
  • Golovatch, E
  • Gothe, RW
  • Griffioen, KA
  • Guidal, M
  • Hafidi, K
  • Hakobyan, H
  • Hanretty, C
  • Harrison, N
  • Hattawy, M
  • Heddle, D
  • Hicks, K
  • Hollis, G
  • Holtrop, Maurik
  • Hughes, SM
  • Ilieva, Y
  • Ireland, DG
  • Ishkhanov, BS
  • Isupov, EL
  • Jenkins, D
  • Jiang, H
  • Jo, HS
  • Joo, K
  • Joosten, S
  • Keller, D
  • Khachatryan, G
  • Khachatryan, M
  • Khandaker, M
  • Kim, A
  • Kim, W
  • Klein, A
  • Klein, FJ
  • Kubarovsky, V
  • Kuleshov, SV
  • Lanza, L
  • Lenisa, P
  • Livingston, K
  • MacGregor, IJD
  • Markov, N
  • McKinnon, B
  • Meyer, CA
  • Meziani, ZE
  • Mineeva, T
  • Mokeev, V
  • Montgomery, RA
  • Movsisyan, A
  • Camacho, C Munoz
  • Murdoch, G
  • Nadel-Turonski, P
  • Net, LA
  • Niccolai, S
  • Niculescu, G
  • Niculescu, I
  • Osipenko, M
  • Ostrovidov, AI
  • Paolone, M
  • Paremuzyan, R
  • Park, K
  • Pasyuk, E
  • Phelps, W
  • Pisano, S
  • Pogorelko, O
  • Price, JW
  • Procureur, S
  • Prok, Y
  • Protopopescu, D
  • Raue, BA
  • Ripani, M
  • Ritchie, BG
  • Rizzo, A
  • Rosner, G
  • Sabatie, F
  • Salgado, C
  • Schumacher, RA
  • Sharabian, YG
  • Simonyan, A
  • Skorodumina, Iu
  • Smith, GD
  • Sokhan, D
  • Sparveris, N
  • Stankovic, I
  • Stepanyan, S
  • Strauch, S
  • Taiuti, M
  • Ungaro, M
  • Voskanyan, H
  • Voutier, E
  • Walford, NK
  • Watts, D
  • Wei, X
  • Wood, MH
  • Zachariou, N
  • Zhang, J
  • Zhao, ZW
  • Collaboration, CLAS
  • Status

    Publication Date

  • September 18, 2017
  • Published In

  • Physical Review C  Journal
  • Keywords

  • nucl-ex
  • Digital Object Identifier (doi)

    Start Page

  • 035204
  • Volume

  • 96
  • Issue

  • 3