Amplitude analysis of $\gamma n -> pi^- p$ data above 1 GeV - INSPIRE

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Amplitude analysis of $\gamma n -> pi^- p$ data above 1 GeV

W. Chen
(
- Duke U.
)
,
H. Gao
(
- Duke U.
)
,
W.J. Briscoe
(
- George Washington U.
)
,
D. Dutta
(
- Mississippi State U.
)
,
A.E. Kudryavtsev
(
- Moscow, ITEP and
- George Washington U.
)

Mar, 2012

11 pages

Published in:

Phys.Rev.C 86 (2012) 015206

e-Print:

1203.4412 [hep-ph]

DOI:

10.1103/PhysRevC.86.015206

PDG:

{{\mathit N}{(1440)}}

\rightarrow

{{\mathit n}}{{\mathit \gamma}}

, helicity-1/2 amplitude A

_{1/2}

Report number:

JLAB-PHY-12-1499

View in:

reference search34 citations

Citations per year

Abstract: (arXiv)

We report a new extraction of nucleon resonance couplings using pi- photoproduction cross sections on the neutron. The world database for the process gamma n --> pi- p above 1 GeV has quadrupled with the addition of new differential cross sections from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab in Hall B. Differential cross sections from CLAS have been improved with a new final-state interaction determination using a diagramatic technique taking into account the NN and piN final-state interaction amplitudes. Resonance couplings have been extracted and compared to previous determinations. With the addition of these new cross sections, significant changes are seen in the high-energy behavior of the SAID cross sections and amplitudes.

Note:

11 pages, 7 figures, 2 tables

24.85.+p
13.60.Le
25.20.-x
25.10.+s
nucleon resonance: coupling
pi-: photoproduction
differential cross section
final-state interaction
high energy behavior
amplitude analysis

References(25)

Figures(37)

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