Target and beam-target spin asymmetries in exclusive pion electroproduction for Q$^2$ > 1 GeV$^2$ . II. ep → e$\pi$$^0$p
P E Bosted
(1)
,
Seungmin Kim
,
P P Adhikari
,
N D Adikaram
,
S A Akbar
,
N D Amaryan
,
P P Pereira
,
N A Avakian
,
M B Badui
,
J. Ball
(2)
,
N B Balossino
,
N B Battaglieri
,
P E Bedlinskiy
,
B B Biselli
,
N B Boiarinov
,
D B Briscoe
,
M B Brooks
,
N B Bültmann
,
N B Burkert
,
H A Cao
,
N D Carman
,
N I Celentano
,
S A Chandavar
,
S A Crede
,
D D D 'Angelo
,
P P Dashyan
,
N I de Vita
,
N E de Sanctis
,
N D Deur
,
D D Djalali
,
P P Dupre
,
N E Egiyan
,
P E Alaoui
,
Nizar Fassi
,
N E Elouadrhiri
,
P E Eugenio
,
N E Fanchini
,
G G Fedotov
,
N K Hafidi
,
P P Hakobyan
,
N A Hanretty
,
N A Harrison
,
N I Hattawy
,
N D Heddle
,
H K Hicks
,
H G Hollis
,
N D Holtrop
,
E E Hughes
,
D K Ireland
,
P E Isupov
,
D B Jenkins
,
H A Jiang
,
P P Jo
,
S K Joo
,
D K Keller
,
P P Khachatryan
,
P P Khandaker
,
N K Kim
,
N K Klei
,
D K Klein
,
N K Koirala
,
N K Kubarovsky
,
N E Kuhn
,
N I Lanza
,
P P Lenisa
,
L K Livingston
,
L A Lu
,
D K Macgregor
,
N A Markov
,
N D Mayer
,
P E Mccracken
,
M B Mckinnon
,
M A Mineeva
,
N I Mirazita
,
N I Mokeev
,
M K Montgomery
,
N I Movsisyan
,
P P Camacho
,
M K Murdoch
,
P P Nadel-Turonski
,
N K Ni
,
P P Niccolai
,
N G Niculescu
,
N I Osipenko
,
S I Ostrovidov
,
P P Paolone
,
P P Paremuzyan
,
P P Park
,
P E Pasyuk
,
P P Phelps
,
P P Pisano
,
P E Pogorelko
,
P P Price
,
P P Prok
,
P P Protopopescu
,
P P Puckett
,
N B Raue
,
N I Ripani
,
N I Rizzo
,
G K Rosner
,
P P Rossi
,
Philippe Roy
,
F. Sabatié
(2)
,
M A Saini
,
P P Schumacher
,
E E Seder
,
N G Sharabian
,
P P Skorodumina
,
D E Smith
,
D K Sokhan
,
P P Sparveris
,
E E Stankovic
,
N A Stepanyan
,
P P Stoler
,
D I Strakovsky
,
S A Strauch
,
N I Taiuti
,
Ye A Tian
,
N B Torayev
,
N A Ungaro
,
P P Voskanyan
,
P E Voutier
,
N K Walford
,
P E Watts
,
N A Wei
,
N B Weinstein
,
N E Zachariou
Seungmin Kim
- Function : Author
- PersonId : 1007720
P P Adhikari
- Function : Author
N D Adikaram
- Function : Author
S A Akbar
- Function : Author
N D Amaryan
- Function : Author
P P Pereira
- Function : Author
N A Avakian
- Function : Author
M B Badui
- Function : Author
N B Balossino
- Function : Author
N B Battaglieri
- Function : Author
P E Bedlinskiy
- Function : Author
B B Biselli
- Function : Author
N B Boiarinov
- Function : Author
D B Briscoe
- Function : Author
M B Brooks
- Function : Author
N B Bültmann
- Function : Author
N B Burkert
- Function : Author
H A Cao
- Function : Author
N D Carman
- Function : Author
N I Celentano
- Function : Author
S A Chandavar
- Function : Author
S A Crede
- Function : Author
D D D 'Angelo
- Function : Author
P P Dashyan
- Function : Author
N I de Vita
- Function : Author
N E de Sanctis
- Function : Author
N D Deur
- Function : Author
D D Djalali
- Function : Author
P P Dupre
- Function : Author
N E Egiyan
- Function : Author
P E Alaoui
- Function : Author
N E Elouadrhiri
- Function : Author
P E Eugenio
- Function : Author
N E Fanchini
- Function : Author
G G Fedotov
- Function : Author
N K Hafidi
- Function : Author
P P Hakobyan
- Function : Author
N A Hanretty
- Function : Author
N A Harrison
- Function : Author
N I Hattawy
- Function : Author
N D Heddle
- Function : Author
H K Hicks
- Function : Author
H G Hollis
- Function : Author
N D Holtrop
- Function : Author
E E Hughes
- Function : Author
D K Ireland
- Function : Author
P E Isupov
- Function : Author
D B Jenkins
- Function : Author
H A Jiang
- Function : Author
P P Jo
- Function : Author
S K Joo
- Function : Author
D K Keller
- Function : Author
P P Khachatryan
- Function : Author
P P Khandaker
- Function : Author
N K Kim
- Function : Author
N K Klei
- Function : Author
D K Klein
- Function : Author
N K Koirala
- Function : Author
N K Kubarovsky
- Function : Author
N E Kuhn
- Function : Author
N I Lanza
- Function : Author
P P Lenisa
- Function : Author
L K Livingston
- Function : Author
L A Lu
- Function : Author
D K Macgregor
- Function : Author
N A Markov
- Function : Author
N D Mayer
- Function : Author
P E Mccracken
- Function : Author
M B Mckinnon
- Function : Author
M A Mineeva
- Function : Author
N I Mirazita
- Function : Author
N I Mokeev
- Function : Author
M K Montgomery
- Function : Author
N I Movsisyan
- Function : Author
P P Camacho
- Function : Author
M K Murdoch
- Function : Author
P P Nadel-Turonski
- Function : Author
N K Ni
- Function : Author
P P Niccolai
- Function : Author
N G Niculescu
- Function : Author
N I Osipenko
- Function : Author
S I Ostrovidov
- Function : Author
P P Paolone
- Function : Author
P P Paremuzyan
- Function : Author
P P Park
- Function : Author
P E Pasyuk
- Function : Author
P P Phelps
- Function : Author
P P Pisano
- Function : Author
P E Pogorelko
- Function : Author
P P Price
- Function : Author
P P Prok
- Function : Author
P P Protopopescu
- Function : Author
P P Puckett
- Function : Author
N B Raue
- Function : Author
N I Ripani
- Function : Author
N I Rizzo
- Function : Author
G K Rosner
- Function : Author
P P Rossi
- Function : Author
Philippe Roy
- Function : Author
- PersonId : 6251
- IdHAL : philippe-roy
- ORCID : 0000-0002-6775-6852
- IdRef : 114529604
M A Saini
- Function : Author
P P Schumacher
- Function : Author
E E Seder
- Function : Author
N G Sharabian
- Function : Author
P P Skorodumina
- Function : Author
D E Smith
- Function : Author
D K Sokhan
- Function : Author
P P Sparveris
- Function : Author
E E Stankovic
- Function : Author
N A Stepanyan
- Function : Author
P P Stoler
- Function : Author
D I Strakovsky
- Function : Author
S A Strauch
- Function : Author
N I Taiuti
- Function : Author
Ye A Tian
- Function : Author
N B Torayev
- Function : Author
N A Ungaro
- Function : Author
P P Voskanyan
- Function : Author
P E Voutier
- Function : Author
N K Walford
- Function : Author
P E Watts
- Function : Author
N A Wei
- Function : Author
N B Weinstein
- Function : Author
N E Zachariou
- Function : Author
Abstract
Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive pi(0) electroproduction reaction. gamma(*) p -> p pi(0), expanding an analysis of the. gamma(*) p -> n pi(+) reaction from the same experiment. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic ranges covered are 1.1 < W < 3 GeV and 1 < Q(2) < 6 GeV2. Results were obtained for about 5700 bins in W, Q(2), cos(theta(*)), and phi(*). The beam-target asymmetries were found to generally be greater than zero, with relatively modest phi(*) dependence. The target asymmetries exhibit very strong phi(*) dependence, with a change in sign occurring between results at low W and high W, in contrast to pi(+) electroproduction. Reasonable agreement is found with phenomenological fits to previous data for W < 1.6 GeV, but significant differences are seen at higherW. When combined with cross-sectional measurements, as well as pi(+) observables, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of Q(2), for resonances with masses as high as 2.4 GeV.
Domains
Nuclear Experiment [nucl-ex]
Origin : Publisher files allowed on an open archive
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