Scholars@Duke publication: Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV

Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV

Publication , Journal Article

Adhikari, S; Akondi, CS; Ali, A; Amaryan, M; Asaturyan, A; Austregesilo, A; Baldwin, Z; Barbosa, F; Barlow, J; Barriga, E; Barsotti, R; Gan, L ...

Published in: Physical Review C

February 1, 2021

Published version (DOI)

We report a measurement of the π- photoproduction beam asymmetry for the reaction γp→π-Δ++ using data from the GlueX experiment in the photon beam energy range 8.2-8.8 GeV. The asymmetry ς is measured as a function of four-momentum transfer t to the Δ++ and compared to phenomenological models. We find that ς varies as a function of t: negative at smaller values and positive at higher values of |t|. The reaction can be described theoretically by t-channel particle exchange requiring pseudoscalar, vector, and tensor intermediaries. In particular, this reaction requires charge exchange, allowing us to probe pion exchange and the significance of higher-order corrections to one-pion exchange at low momentum transfer. Constraining production mechanisms of conventional mesons may aid in the search for and study of unconventional mesons. This is the first measurement of the process at this energy.

Duke Scholars

Author Haiyan Gao Physics

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Published In

Physical Review C

DOI

10.1103/PhysRevC.103.L022201

EISSN

2469-9993

ISSN

2469-9985

Publication Date

February 1, 2021

Volume

103

Issue

Citation

APA

Chicago

ICMJE

MLA

NLM

Adhikari, S., Akondi, C. S., Ali, A., Amaryan, M., Asaturyan, A., Austregesilo, A., … Rodriguez, G. (2021). Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV. Physical Review C, 103(2). https://doi.org/10.1103/PhysRevC.103.L022201

Adhikari, S., C. S. Akondi, A. Ali, M. Amaryan, A. Asaturyan, A. Austregesilo, Z. Baldwin, et al. “Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV.” Physical Review C 103, no. 2 (February 1, 2021). https://doi.org/10.1103/PhysRevC.103.L022201.

Adhikari S, Akondi CS, Ali A, Amaryan M, Asaturyan A, Austregesilo A, et al. Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV. Physical Review C. 2021 Feb 1;103(2).

Adhikari, S., et al. “Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV.” Physical Review C, vol. 103, no. 2, Feb. 2021. Scopus, doi:10.1103/PhysRevC.103.L022201.

Adhikari S, Akondi CS, Ali A, Amaryan M, 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, Cannon BE, Chudakov E, Cole S, Cortes O, Crede V, Dalton MM, Daniels T, Deur A, Dobbs S, Dolgolenko A, Dotel R, Dugger M, Dzhygadlo R, Egiyan H, Erbora T, Ernst A, Eugenio P, Fanelli C, Fegan S, Fitches J, Foda AM, Furletov S, Gan L, Gao H, Gasparian A, Gleason C, Goetzen K, Goryachev VS, Guo L, Hakobyan H, Hamdi A, Huber GM, Hurley A, Ireland DG, Ito MM, Jaegle I, Jarvis NS, Jones RT, Kakoyan V, Kalicy G, Kamel M, Khachatryan V, Khatchatryan M, Kourkoumelis C, Kuleshov S, Laduke A, Larin I, Lawrence D, Lersch DI, Li H, Li WB, Liu B, Livingston K, Lolos GJ, Luckas K, Lyubovitskij V, Mack D, Marukyan H, Matveev V, McCaughan M, McCracken M, McGinley W, Meyer CA, Miskimen R, Mitchell RE, Mizutani K, Neelamana V, Nerling F, Ng L, Ostrovidov AI, Papandreou Z, Paudel C, Pauli P, Pedroni R, Pentchev L, Peters KJ, Phelps W, Pooser E, Reinhold J, Ritchie BG, Ritman J, Rodriguez G. Measurement of beam asymmetry for π- Δ++ photoproduction on the proton at Eγ=8.5 GeV. Physical Review C. 2021 Feb 1;103(2).

Published In

Physical Review C

DOI

10.1103/PhysRevC.103.L022201

EISSN

2469-9993

ISSN

2469-9985

Publication Date

February 1, 2021

Volume

103