Photoproduction of meson pairs: First measurement of the polarization observable I**s - INSPIRE

DataBETA

Photoproduction of meson pairs: First measurement of the polarization observable I**s

CBELSA and
TAPS

Collaborations

•

E. Gutz
(
- Bonn U., HISKP
)

Dec, 2009

9 pages

Published in:

Phys.Lett.B 687 (2010) 11-15

e-Print:

0912.2632 [nucl-ex]

DOI:

10.1016/j.physletb.2010.02.076

Experiments:

GSI-TAPS

View in:

ADS Abstract Service

reference search50 citations

Citations per year

Abstract: (Elsevier)

The polarization observable Is , a feature exclusive to the acoplanar kinematics of multi-meson final states produced via linearly polarized photons, has been measured for the first time. Results for the reaction γ→p→pπ0η are presented for incoming photon energies between 970 MeV and 1650 MeV along with the beam asymmetry Ic . The comparably large asymmetries demonstrate a high sensitivity of Is to the dynamics of the reaction. The sensitivity of these new polarization observables to the contributing partial waves is demonstrated by fits using the Bonn–Gatchina partial wave analysis.

Note:

11 pages, 6 figures, v2 to appear in Phys. Lett. B

13.88.+e
16.50.\
13.60.Le
13.60.-r
photon p: exclusive reaction
photon: polarized beam
pi0: photoproduction
eta: photoproduction
pseudoscalar meson: pair production
polarization: asymmetry

References(28)

Figures(6)

- Prog.Part.Nucl.Phys. 45 241

Relativistic quark models of baryons with instantaneous forces: Theoretical background

- Eur.Phys.J.A 10 (2001) 309-346
•
e-Print:
- hep-ph/0103287
•
DOI:
- 10.1007/s100500170117

Quasi two-body decays of nonstrange baryons

Simon Capstick
(
- Jefferson Lab
)
,
Winston Roberts
(
- Old Dominion U. and
- Jefferson Lab
)

- Phys.Rev.D 49 (1994) 4570-4586
•
e-Print:
- nucl-th/9310030
•
DOI:
- 10.1103/PhysRevD.49.4570

Photoproduction of eta mesons off protons for Egamma <= 1.15-GeV

et al.

- Phys.Rev.C 74 (2006) 035202
•
DOI:
- 10.1103/PhysRevC.74.035202

Simultaneous photoproduction of eta and pi0 mesons on the proton

J. Ajaka
(
- Orsay, IPN
)
,
Y. Assafiri
(
- Orsay, IPN
)
,
O. Bartalini
(
- INFN, Rome2 and
- Rome U., Tor Vergata
)
,
V. Bellini
(
- INFN, Catania and
- Catania U.
)
,
S. Bouchigny
(
- Orsay, IPN
)

et al.

- Phys.Rev.Lett. 100 (2008) 052003
•
DOI:
- 10.1103/PhysRevLett.100.052003

Evidence for a Parity Doublet Delta (1920) P-33 and Delta (1940) D-33 from gamma p --> p pi0 eta

CB-ELSA

Collaboration

•

I. Horn
(
- Bonn U., HISKP
)

et al.

- Phys.Rev.Lett. 101 (2008) 202002
•
e-Print:
- 0711.1138
•
DOI:
- 10.1103/PhysRevLett.101.202002

Study of the reaction gamma p ---> p pi0 eta

CB-ELSA

Collaboration

•

I. Horn
(
- Bonn U., HISKP
)

et al.

- Eur.Phys.J.A 38 (2008) 173-186
•
e-Print:
- 0806.4251
•
DOI:
- 10.1140/epja/i2008-10657-7

Photoproduction of pi0 eta on protons and the Delta(1700)D(33) resonance

Collaborations

•

V.L. Kashevarov
(
- Mainz U., Inst. Kernphys. and
- Lebedev Inst.
)

et al.

- Eur.Phys.J.A 42 (2009) 141-149
•
e-Print:
- 0901.3888
•
DOI:
- 10.1140/epja/i2009-10868-4

Measurement of the beam asymmetry $\Sigma$ in $\pi^°\eta$ production off the proton with the CBELSA/TAPS experiment

CBELSA

Collaboration

•

E. Gutz
(
- Bonn U., HISKP
)

et al.

- Eur.Phys.J.A 35 (2008) 291-293,
•
DOI:
- 10.1140/epja/i2008-10566-9

Chiral dynamics in the gamma p ---> pi0 eta p and gamma p ---> pi0 K0 Sigma+ reactions

M. Doring
(
- Valencia U. and
- Valencia U., IFIC
)
,
E. Oset
(
- Valencia U. and
- Valencia U., IFIC
)
,
D. Strottman
(
- Valencia U. and
- Valencia U., IFIC and
- Los Alamos
)

- Phys.Rev.C 73 (2006) 045209
•
e-Print:
- nucl-th/0510015
•
DOI:
- 10.1103/PhysRevC.73.045209

Analysis of angular distributions in gamma N ---> pi0 eta N

A. Fix
(
- Mainz U., Inst. Kernphys.
)
,
M. Ostrick
(
- Mainz U., Inst. Kernphys.
)
,
L. Tiator
(
- Mainz U., Inst. Kernphys.
)

- Eur.Phys.J.A 36 (2008) 61-72
•
e-Print:
- 0803.1755
•
DOI:
- 10.1140/epja/i2007-10551-x

Partial wave decomposition of pion and photoproduction amplitudes

A. Anisovich
(
- Bonn U., HISKP and
- St. Petersburg, INP
)
,
E. Klempt
(
- Bonn U., HISKP
)
,
A. Sarantsev
(
- Bonn U., HISKP and
- St. Petersburg, INP
)
,
U. Thoma
(
- Giessen U.
)

- Eur.Phys.J.A 24 (2005) 111-128
•
e-Print:
- hep-ph/0407211
•
DOI:
- 10.1140/epja/i2004-10125-6

Baryon resonances and polarization transfer in hyperon photoproduction

A.V. Anisovich
(
- Bonn U., HISKP and
- St. Petersburg, INP
)
,
V. Kleber
(
- Bonn U.
)
,
E. Klempt
(
- Bonn U., HISKP
)
,
V.A. Nikonov
(
- Bonn U., HISKP and
- St. Petersburg, INP
)
,
A.V. Sarantsev
(
- Bonn U., HISKP and
- St. Petersburg, INP
)

et al.

- Eur.Phys.J.A 34 (2007) 243-254
•
e-Print:
- 0707.3596
•
DOI:
- 10.1140/epja/i2007-10503-6

Parity doublets and chiral symmetry restoration in baryon spectrum

L.Ya. Glozman
(
- KEK, Tanashi
)

- Phys.Lett.B 475 (2000) 329-334
•
e-Print:
- hep-ph/9908207
•
DOI:
- 10.1016/S0370-2693(00)00096-4

Diquark correlations in baryon spectroscopy and holographic QCD

Hilmar Forkel
(
- Humboldt U., Berlin
)
,
Eberhard Klempt
(
- Bonn U., HISKP
)

- Phys.Lett.B 679 (2009) 77-80
•
e-Print:
- 0810.2959
•
DOI:
- 10.1016/j.physletb.2009.07.008

Light-Front Holography and Gauge/Gravity Duality: The Light Meson and Baryon Spectra

Guy F. de Teramond
(
- Costa Rica U.
)
,
Stanley J. Brodsky
(
- SLAC
)

- Nucl.Phys.B Proc.Suppl. 199 (2010) 89-96
•
e-Print:
- 0909.3900
•
DOI:
- 10.1016/j.nuclphysbps.2010.02.010

Beam-helicity asymmetries in double-charged-pion photoproduction on the proton

CLAS

Collaboration

•

S. Strauch
(
- George Washington U. and
- South Carolina U.
)

et al.

- Phys.Rev.Lett. 95 (2005) 162003
•
e-Print:
- hep-ex/0508002
•
DOI:
- 10.1103/PhysRevLett.95.162003

Beam-Helicity Asymmetries in Double Pion Photoproduction off the Proton

Collaborations

•

D. Krambrich
(
- Mainz U., Inst. Kernphys.
)

et al.

- Phys.Rev.Lett. 103 (2009) 052002
•
e-Print:
- 0907.0358
•
DOI:
- 10.1103/PhysRevLett.103.052002

Polarization observables for two-pion production off the nucleon

W. Roberts
(
- Old Dominion U. and
- Jefferson Lab
)
,
T. Oed
(
- Old Dominion U.
)

- Phys.Rev.C 71 (2005) 055201
•
e-Print:
- nucl-th/0410012
•
DOI:
- 10.1103/PhysRevC.71.055201

A Dependence of the gamma and p-induced production of the Lambda(1520) from nuclei

M. Kaskulov
(
- Valencia U. and
- Valencia U., IFIC
)
,
L. Roca
(
- Murcia U.
)
,
E. Oset
(
- Valencia U. and
- Valencia U., IFIC
)

- Eur.Phys.J.A 28 (2006) 139-145
•
e-Print:
- nucl-th/0601074
•
DOI:
- 10.1140/epja/i2006-10052-6

The Crystal Barrel spectrometer at LEAR

Crystal Barrel

Collaboration

•

E. Aker
(
- Zurich U.
)

et al.

- Nucl.Instrum.Meth.A 321 (1992) 69-108
•
DOI:
- 10.1016/0168-9002(92)90379-I

The BaF-2 photon spectrometer TAPS

TAPS

Collaboration

•

R. Novotny
(
- Giessen U.
)

for the collaboration.

- IEEE Trans.Nucl.Sci. 38 (1991) 379-385
•
DOI:
- 10.1109/23.289329

Response of TAPS to monochromatic photons with energies between 45-MeV and 790-MeV

et al.

- Nucl.Instrum.Meth.A 346 (1994) 168-176
•
DOI:
- 10.1016/0168-9002(94)90701-3

A scintillating fibre detector for the Crystal Barrel experiment at ELSA

G. Suft
(
- Erlangen - Nuremberg U. and
- Bonn U.
)
,
G. Anton
(
- Erlangen - Nuremberg U. and
- Bonn U.
)
,
R. Bogendorfer
(
- Erlangen - Nuremberg U. and
- Bonn U.
)
,
A. Ehmanns
(
- Erlangen - Nuremberg U. and
- Bonn U.
)
,
A. Fosel
(
- Erlangen - Nuremberg U. and
- Bonn U.
)

et al.

- Nucl.Instrum.Meth.A 538 (2005) 416-424
•
DOI:
- 10.1016/j.nima.2004.09.029

Measurement of the beam asymmetry in eta-photoproduction off the proton

CBELSA and
TAPS

Collaborations

•

D. Elsner
(
- Bonn U.
)

et al.

- Eur.Phys.J.A 33 (2007) 147-155
•
e-Print:
- nucl-ex/0702032
•
DOI:
- 10.1140/epja/i2007-10447-9

1-25 of 28
1
2
25 / page