Measurement of beam asymmetry for [pi]-[delta]++ photoproduction on the proton at E[gamma]=8.5 GeV; Physical Review C; Vol. 103, iss. 2
| Parent link: | Physical Review C Vol. 103, iss. 2.— 2021.— [L022201, 7 р.] |
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| Korporativní autor: | |
| Další autoři: | , , , , |
| Shrnutí: | Title screen We report a measurement of the [pi]- photoproduction beam asymmetry for the reaction [gamma] p -> [pi]-[delta]++ using data from the GLUEX experiment in the photon beam energy range 8.2-8.8 GeV. The asymmetry [sigma] is measured as a function of four-momentum transfer t to the [delta]++ and compared to phenomenological models. We find that 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. |
| Jazyk: | angličtina |
| Vydáno: |
2021
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| Témata: | |
| On-line přístup: | https://doi.org/10.1103/PhysRevC.103.L022201 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666184 |
MARC
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| 200 | 1 | |a Measurement of beam asymmetry for [pi]-[delta]++ photoproduction on the proton at E[gamma]=8.5 GeV |f Sh. Adhikari, C. S. Akondi, A. Ali [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 38 tit.] | ||
| 330 | |a We report a measurement of the [pi]- photoproduction beam asymmetry for the reaction [gamma] p -> [pi]-[delta]++ using data from the GLUEX experiment in the photon beam energy range 8.2-8.8 GeV. The asymmetry [sigma] is measured as a function of four-momentum transfer t to the [delta]++ and compared to phenomenological models. We find that 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. | ||
| 461 | |t Physical Review C | ||
| 463 | |t Vol. 103, iss. 2 |v [L022201, 7 р.] |d 2021 | ||
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| 701 | 1 | |a Adhikari |b Sh. |g Shankar | |
| 701 | 1 | |a Akondi |b C. S. | |
| 701 | 1 | |a Ali |b A. | |
| 701 | 1 | |a Amaryan |b M. | |
| 701 | 1 | |a Lyubovitskiy (Lyubovitskij) |b V. E. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, Professor of the University of Tubingen (Germany) |f 1963- |g Valery Efimovich |3 (RuTPU)RU\TPU\pers\33385 |9 17080 | |
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