Measurement of the 1H(γ, p)π0 reaction using a novel nucleon spin polarimeter.
We report the first large-acceptance measurement of polarization transfer from a polarized photon beam to a recoiling nucleon. The measurement pioneers a novel polarimetry technique, which can be applied to many other nuclear and hadron physics experiments. The commissioning reaction of 1H(γ, p)π0 in the range 0.4<Eγ<1.4  GeV validates the technique and provides essential new data to constrain the excitation spectrum of the nucleon.
SUPA, School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
M H
MH
Sikora
SUPA, School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
D P
DP
Watts
SUPA, School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
D I
DI
Glazier
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
P
P
Aguar-Bartolomé
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
L K
LK
Akasoy
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
J R M
JR
Annand
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
H J
HJ
Arends
Kent State University, Kent, Ohio 44242, USA.
K
K
Bantawa
Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, D-53115 Bonn, Germany.
R
R
Beck
Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia.
V S
VS
Bekrenev
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
H
H
Berghäuser
INFN Sezione di Pavia, I-27100 Pavia, Italy.
A
A
Braghieri
SUPA, School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
D
D
Branford
The George Washington University, Washington, D.C. 20052, USA.
W J
WJ
Briscoe
University of California Los Angeles, Los Angeles, California 90095-1547, USA.
J
J
Brudvik
Lebedev Physical Institute, 119991 Moscow, Russia.
S
S
Cherepnya
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
R F B
RF
Codling
The George Washington University, Washington, D.C. 20052, USA.
B T
BT
Demissie
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany and SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom and The George Washington University, Washington, D.C. 20052, USA.
E J
EJ
Downie
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
P
P
Drexler
Lebedev Physical Institute, 119991 Moscow, Russia.
L V
LV
Fil'kov
The George Washington University, Washington, D.C. 20052, USA.
B
B
Freehart
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
R
R
Gregor
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
D
D
Hamilton
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany and The George Washington University, Washington, D.C. 20052, USA.
E
E
Heid
Mount Allison University, Sackville, New Brunswick E4L3B5, Canada.
D
D
Hornidge
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
D A
DA
Howdle
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
I
I
Jaegle
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
O
O
Jahn
SUPA, School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
T C
TC
Jude
Lebedev Physical Institute, 119991 Moscow, Russia.
V L
VL
Kashevarov
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
I
I
Keshelashvili
Institute for Nuclear Research, 125047 Moscow, Russia.
R
R
Kondratiev
Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia.
M
M
Korolija
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
M
M
Kotulla
Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia.
A A
AA
Koulbardis
Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia.
S P
SP
Kruglov
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
B
B
Krusche
Institute for Nuclear Research, 125047 Moscow, Russia.
V
V
Lisin
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
K
K
Livingston
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
I J D
IJ
MacGregor
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
Y
Y
Maghrbi
Kent State University, Kent, Ohio 44242, USA.
D M
DM
Manley
The George Washington University, Washington, D.C. 20052, USA.
Z
Z
Marinides
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
M
M
Martinez
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
J C
JC
McGeorge
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
B
B
McKinnon
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
E F
EF
McNicoll
Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia.
D
D
Mekterovic
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
V
V
Metag
Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia.
S
S
Micanovic
Mount Allison University, Sackville, New Brunswick E4L3B5, Canada.
D G
DG
Middleton
INFN Sezione di Pavia, I-27100 Pavia, Italy.
A
A
Mushkarenkov
University of California Los Angeles, Los Angeles, California 90095-1547, USA.
B M K
BM
Nefkens
Helmholtz-Institut für Strahlen-und Kernphysik, University of Bonn, D-53115 Bonn, Germany.
A
A
Nikolaev
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
R
R
Novotny
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
M
M
Ostrick
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
P B
PB
Otte
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany and The George Washington University, Washington, D.C. 20052, USA.
B
B
Oussena
INFN Sezione di Pavia, I-27100 Pavia, Italy.
P
P
Pedroni
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
F
F
Pheron
Institute for Nuclear Research, 125047 Moscow, Russia.
A
A
Polonski
University of California Los Angeles, Los Angeles, California 90095-1547, USA.
S
S
Prakhov
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
J
J
Robinson
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
G
G
Rosner
INFN Sezione di Pavia, I-27100 Pavia, Italy.
T
T
Rostomyan
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
S
S
Schumann
The Catholic University of America, Washington D.C. 20064, USA.
D I
DI
Sober
University of California Los Angeles, Los Angeles, California 90095-1547, USA.
A
A
Starostin
The George Washington University, Washington, D.C. 20052, USA.
I I
II
Strakovsky
University of California Los Angeles, Los Angeles, California 90095-1547, USA.
I M
IM
Suarez
Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia.
I
I
Supek
II Physikalisches Institut, University of Giessen, D-35392 Giessen, Germany.
M
M
Thiel
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
A
A
Thomas
Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany.
M
M
Unverzagt
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
D
D
Werthmüller
The George Washington University, Washington, D.C. 20052, USA.
R L
RL
Workman
Rudjer Boskovic Institute, HR-10000 Zagreb, Croatia.
I
I
Zamboni
Department Physik, University of Basel, CH-4056 Basel, Switzerland.
F
F
Zehr