Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

H Al Ghoul; Unknown First Name [Unknown]; Ashot Gasparian; Ronald S Pedroni; Unknown First Name et al.

Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

H Al Ghoul, Unknown First Name [Unknown], Ashot Gasparian, Ronald S Pedroni, Unknown First Name et al.

Physics

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Abstract

We report measurements of the photon beam asymmetry Σ for the reactions ⃗γp→pπ0 and ⃗γp→pη from the GlueX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

Original language	English
Pages (from-to)	6
Journal	Physical Review
Volume	C 95
Issue number	4
State	Published - 2017

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@article{54bb73dd3d71471db89df789ef3e5cf4,

title = "Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV",

abstract = "We report measurements of the photon beam asymmetry Σ for the reactions ⃗γp→pπ0 and ⃗γp→pη from the GlueX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.",

author = "\{Al Ghoul\}, H and [Unknown], \{Unknown First Name\} and Ashot Gasparian and Pedroni, \{Ronald S\} and \{et al.\}, \{Unknown First Name\}",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

language = "English",

volume = "C 95",

pages = "6",

journal = "Physical Review",

number = "4",

}

TY - JOUR

T1 - Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

AU - Al Ghoul, H

AU - [Unknown], Unknown First Name

AU - Gasparian, Ashot

AU - Pedroni, Ronald S

AU - et al., Unknown First Name

PY - 2017

Y1 - 2017

N2 - We report measurements of the photon beam asymmetry Σ for the reactions ⃗γp→pπ0 and ⃗γp→pη from the GlueX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

AB - We report measurements of the photon beam asymmetry Σ for the reactions ⃗γp→pπ0 and ⃗γp→pη from the GlueX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

M3 - Article

VL - C 95

SP - 6

JO - Physical Review

JF - Physical Review

IS - 4

ER -

Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

Abstract

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