The ep→e′pη Reaction at and above the S11(1535) Baryon Resonance

R. Thompson; Angela Biselli

doi:10.1103/PhysRevLett.86.1702

The ep→e′pη Reaction at and above the S11(1535) Baryon Resonance

R. Thompson, Angela Biselli

Fairfield University

Research output: Contribution to journal › Article › peer-review

Abstract

New cross sections for the reaction ep→epη are reported for total center of mass energy W=1.5–1.86GeV and invariant momentum transfer Q2=0.25–1.5(GeV/c)2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. Newly observed structure at W∼1.65GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

Original language	American English
Journal	Physical Review Letters
Volume	86
DOIs	https://doi.org/10.1103/PhysRevLett.86.1702
State	Published - Jan 1 2001

Disciplines

Physical Sciences and Mathematics
Physics

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The ep e p Reaction at and above the S11(1535) Baryon ResonanceFinal published version, 273 KBLicense: CC BY

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title = "The ep→e′pη Reaction at and above the S11(1535) Baryon Resonance",

abstract = " New cross sections for the reaction ep→epη are reported for total center of mass energy W=1.5–1.86GeV and invariant momentum transfer Q2=0.25–1.5(GeV/c)2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. Newly observed structure at W∼1.65GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.",

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N2 - New cross sections for the reaction ep→epη are reported for total center of mass energy W=1.5–1.86GeV and invariant momentum transfer Q2=0.25–1.5(GeV/c)2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. Newly observed structure at W∼1.65GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

AB - New cross sections for the reaction ep→epη are reported for total center of mass energy W=1.5–1.86GeV and invariant momentum transfer Q2=0.25–1.5(GeV/c)2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. Newly observed structure at W∼1.65GeV is shown to come from interference between S and P waves and can be interpreted with known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/108

U2 - 10.1103/PhysRevLett.86.1702

DO - 10.1103/PhysRevLett.86.1702

M3 - Article

VL - 86

JO - Physical Review Letters

JF - Physical Review Letters

ER -

The ep→e′pη Reaction at and above the S11(1535) Baryon Resonance

Abstract

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