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Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2-8.8 GeV

Publication ,  Journal Article
Adhikari, S; Afzal, F; Akondi, CS; Albrecht, M; Amaryan, M; Arroyave, V; Asaturyan, A; Austregesilo, A; Baldwin, Z; Barbosa, F; Barlow, J ...
Published in: Physical Review C
November 1, 2023

The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized 8.5GeV photons impinging on a hydrogen target which is contained within a detector with near-complete coverage for charged and neutral particles. We present measurements of spin-density matrix elements for the photoproduction of the vector meson ρ(770). The statistical precision achieved exceeds that of previous experiments for polarized photoproduction in this energy range by orders of magnitude. We confirm a high degree of s-channel helicity conservation at small squared four-momentum transfer t and are able to extract the t dependence of natural- and unnatural-parity exchange contributions to the production process in detail. We confirm the dominance of natural-parity exchange over the full t range. We also find that helicity amplitudes in which the helicity of the incident photon and the photoproduced ρ(770) differ by two units are negligible for -t<0.5GeV2/c2.

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Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

November 1, 2023

Volume

108

Issue

5

Related Subject Headings

  • 5106 Nuclear and plasma physics
 

Citation

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Adhikari, S., Afzal, F., Akondi, C. S., Albrecht, M., Amaryan, M., Arroyave, V., … Nissen, E. (2023). Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2-8.8 GeV. Physical Review C, 108(5). https://doi.org/10.1103/PhysRevC.108.055204
Adhikari, S., F. Afzal, C. S. Akondi, M. Albrecht, M. Amaryan, V. Arroyave, A. Asaturyan, et al. “Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2-8.8 GeV.” Physical Review C 108, no. 5 (November 1, 2023). https://doi.org/10.1103/PhysRevC.108.055204.
Adhikari S, Afzal F, Akondi CS, Albrecht M, Amaryan M, Arroyave V, et al. Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2-8.8 GeV. Physical Review C. 2023 Nov 1;108(5).
Adhikari, S., et al. “Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2-8.8 GeV.” Physical Review C, vol. 108, no. 5, Nov. 2023. Scopus, doi:10.1103/PhysRevC.108.055204.
Adhikari S, Afzal F, Akondi CS, Albrecht M, Amaryan M, Arroyave V, Asaturyan A, Austregesilo A, Baldwin Z, Barbosa F, Barlow J, Barriga E, Barsotti R, Beattie TD, Berdnikov VV, Black T, Boeglin W, Briscoe WJ, Britton T, Brooks WK, Byer D, Chudakov E, Cole PL, Cortes O, Crede V, Dalton MM, Darulis D, Deur A, Dobbs S, Dolgolenko A, Dotel R, Dugger M, Dzhygadlo R, Ebersole D, Edo M, Egiyan H, Erbora T, Eugenio P, Fabrizi A, Fanelli C, Fang S, Fegan S, Fitches J, Foda AM, Furletov S, Gan L, Gao H, Gardner A, Gasparian A, Gleason C, Goetzen K, Goryachev VS, Grube B, Guo J, Guo L, Hague TJ, Hakobyan H, Hernandez J, Hoffman ND, Hornidge D, Hou G, Huber GM, Hurck P, Hurley A, Imoehl W, Ireland DG, Ito MM, Jaegle I, Jarvis NS, Jeske T, Jones RT, Kakoyan V, Kalicy G, Khachatryan V, Khatchatryan M, Kourkoumelis C, Laduke A, Larin I, Lawrence D, Lersch DI, Li H, Liu B, Livingston K, Lolos GJ, Lorenti L, Lyubovitskij V, Ma R, Mack D, Mahmood A, Marukyan H, Matveev V, McCaughan M, McCracken M, Meyer CA, Miskimen R, Mitchell RE, Mizutani K, Neelamana V, Ng L, Nissen E. Measurement of spin-density matrix elements in ρ(770) production with a linearly polarized photon beam at Eγ=8.2-8.8 GeV. Physical Review C. 2023 Nov 1;108(5).

Published In

Physical Review C

DOI

EISSN

2469-9993

ISSN

2469-9985

Publication Date

November 1, 2023

Volume

108

Issue

5

Related Subject Headings

  • 5106 Nuclear and plasma physics