@article{0c57e679096742e2b39e1bd7defea329,
title = "Beam-Target Helicity Asymmetry for γ → n → →π-p in the N∗ Resonance Region",
abstract = "We report the first beam-target double-polarization asymmetries in the γ+n(p)→π-+p(p) reaction spanning the nucleon resonance region from invariant mass W=1500 to 2300 MeV. Circularly polarized photons and longitudinally polarized deuterons in solid hydrogen deuteride (HD) have been used with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The exclusive final state has been extracted using three very different analyses that show excellent agreement, and these have been used to deduce the E polarization observable for an effective neutron target. These results have been incorporated into new partial wave analyses and have led to significant revisions for several γnN∗ resonance photocouplings.",
author = "{(CLAS Collaboration)} and D. Ho and P. Peng and C. Bass and P. Collins and A. D'Angelo and A. Deur and J. Fleming and C. Hanretty and T. Kageya and M. Khandaker and Klein, {F. J.} and E. Klempt and V. Laine and Lowry, {M. M.} and H. Lu and C. Nepali and Nikonov, {V. A.} and T. O'Connell and Sandorfi, {A. M.} and Sarantsev, {A. V.} and Schumacher, {R. A.} and Strakovsky, {I. I.} and A. {\v S}varc and Walford, {N. K.} and X. Wei and Whisnant, {C. S.} and Workman, {R. L.} and I. Zonta and Adhikari, {K. P.} and D. Adikaram and Z. Akbar and Amaryan, {M. J.} and {Anefalos Pereira}, S. and H. Avakian and J. Ball and M. Bashkanov and M. Battaglieri and V. Batourine and I. Bedlinskiy and A. Biselli and Briscoe, {W. J.} and Burkert, {V. D.} and Carman, {D. S.} and A. Celentano and G. Charles and T. Chetry and G. Ciullo and L. Clark and L. Colaneri and Barry Ritchie",
year = "2017",
month = jun,
day = "16",
doi = "10.1103/PhysRevLett.118.242002",
language = "English (US)",
volume = "118",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "24",
}