Q2 dependence of the S11(1535) photocoupling and evidence for a P-wave resonance in η electroproduction

H. Denizli; Angela Biselli

doi:10.1103/PhysRevC.76.015204

Q2 dependence of the S11(1535) photocoupling and evidence for a P-wave resonance in η electroproduction

H. Denizli, Angela Biselli

Fairfield University

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

Abstract

New cross sections for the reaction ep→e′ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W~1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q2. Improved values are derived for the photocoupling amplitude for the S11(1535) resonance. The new data greatly expand the Q2 range covered, and an interpretation of all data with a consistent parametrization is provided.

Original language	American English
Journal	Physical Review C
Volume	76
DOIs	https://doi.org/10.1103/PhysRevC.76.015204
State	Published - Jan 1 2007

Disciplines

Physical Sciences and Mathematics
Physics

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Q2 dependence of the S11(1535) photocoupling and evidence for a PFinal published version, 880 KBLicense: CC BY

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title = "Q2 dependence of the S11(1535) photocoupling and evidence for a P-wave resonance in η electroproduction",

abstract = " New cross sections for the reaction ep→e′ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W\textasciitilde{}1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q2. Improved values are derived for the photocoupling amplitude for the S11(1535) resonance. The new data greatly expand the Q2 range covered, and an interpretation of all data with a consistent parametrization is provided.",

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doi = "10.1103/PhysRevC.76.015204",

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AU - Denizli, H.

AU - Biselli, Angela

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Y1 - 2007/1/1

N2 - New cross sections for the reaction ep→e′ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W~1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q2. Improved values are derived for the photocoupling amplitude for the S11(1535) resonance. The new data greatly expand the Q2 range covered, and an interpretation of all data with a consistent parametrization is provided.

AB - New cross sections for the reaction ep→e′ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W~1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q2. Improved values are derived for the photocoupling amplitude for the S11(1535) resonance. The new data greatly expand the Q2 range covered, and an interpretation of all data with a consistent parametrization is provided.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/67

U2 - 10.1103/PhysRevC.76.015204

DO - 10.1103/PhysRevC.76.015204

M3 - Article

VL - 76

JO - Physical Review C

JF - Physical Review C

ER -

Q2 dependence of the S11(1535) photocoupling and evidence for a P-wave resonance in η electroproduction

Abstract

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