Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

Publication type:

Journal article

Metadata:

Autoren

A Airapetian
N Akopov
Z Akopov
EC Aschenauer
W Augustyniak
R Avakian
A Avetissian
E Avetisyan
S Belostotski
HP Blok
A Borissov
J Bowles
I Brodski
V Bryzgalov
J Burns
M Capiluppi
GP Capitani
E Cisbani
G Ciullo
M Contalbrigo
PF Dalpiaz
W Deconinck
R De Leo
L De Nardo
E De Sanctis
M Diefenthaler
P Di Nezza
M Dueren
M Ehrenfried
G Elbakian
F Ellinghaus
E Etzelmueller
R Fabbri
A Fantoni
L Felawka
S Frullani
G Gapienko
V Gapienko
F Garibaldi
G Gavrilov
V Gharibyan
F Giordano
S Gliske
M Golembiovskaya
IM Gregor
H Guler
M Hartig
D Hasch
A Hillenbrand
M Hoek
Y Holler
I Hristova
A Ivanilov
HE Jackson
HS Jo
S Joosten
R Kaiser
G Karyan
T Keri
E Kinney
A Kisselev
V Korotkov
V Kozlov
B Krauss
P Kravchenko
VG Krivokhijine
L Lagamba
L Lapikas
I Lehmann
P Lenisa
A Lopez Ruiz
W Lorenzon
S Lu
X Lu
B-Q Ma
D Mahon
NCR Makins
SI Manaenkov
L Manfre
Y Mao
B Marianski
A Martinez de la Ossa
H Marukyan
CA Miller
Y Miyachi
A Movsisyan
M Murray
A Mussgiller
E Nappi
Y Naryshkin
A Nass
M Negodaev
W-D Nowak
A Osborne
LL Pappalardo
R Perez-Benito
A Petrosyan
PE Reimer
AR Reolon
C Riedl
K Rith
G Rosner
A Rostomyan
L Rubacek
J Rubin
D Ryckbosch
A Schaefer
G Schnell
KP Schueler
B Seitz
C Shearer
T-A Shibata
V Shutov
M Stancari
M Statera
JJM Steijger
J Stewart
S Taroian
A Terkulov
R Truty
A Trzcinski
M Tytgat
Y Van Haarlem
C Van Hulse
D Veretennikov
V Vikhrov
I Vilardi
S Wang
S Yaschenko
Z Ye
S Yen
V Zagrebelnyy
D Zeiler
B Zihlmann
P Zupranski

Autoren-URL

https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000310851800025&DestLinkType=FullRecord&DestApp=WOS_CPL

DOI

10.1007/JHEP10(2012)042

Externe Identifier

Clarivate Analytics Document Solution ID: 034EB

ISSN

1029-8479

Ausgabe der Veröffentlichung

Zeitschrift

JOURNAL OF HIGH ENERGY PHYSICS

Schlüsselwörter

Lepton-Nucleon Scattering

Artikelnummer

ARTN 042

Datum der Veröffentlichung

2012

Status

Published

Titel

Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

Sub types

Article

Data source: Web of Science (Lite)

Other metadata sources:

Abstract

AbstractThe beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized Hera positron beam scattering off an unpolarized hydrogen target is measured at Hermes. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe-Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting ofep→epγevents with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of background fromep→eN πγevents, which was estimated to contribute an average of about 12% to the signal in previous Hermes publications. The removal of this background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0.054 ± 0.016 to −0.328 ± 0.027 (stat.) ± 0.045 (syst.).

Autoren

A Airapetian
N Akopov
Z Akopov
EC Aschenauer
W Augustyniak
R Avakian
A Avetissian
E Avetisyan
S Belostotski
HP Blok
A Borissov
J Bowles
I Brodski
V Bryzgalov
J Burns
M Capiluppi
GP Capitani
E Cisbani
G Ciullo
M Contalbrigo
PF Dalpiaz
W Deconinck
R De Leo
L De Nardo
E De Sanctis
M Diefenthaler
P Di Nezza
M Düren
M Ehrenfried
G Elbakian
F Ellinghaus
E Etzelmüller
R Fabbri
A Fantoni
L Felawka
S Frullani
G Gapienko
V Gapienko
F Garibaldi
G Gavrilov
V Gharibyan
F Giordano
S Gliske
M Golembiovskaya
IM Gregor
H Guler
M Hartig
D Hasch
A Hillenbrand
M Hoek
Y Holler
I Hristova
A Ivanilov
HE Jackson
HS Jo
S Joosten
R Kaiser
G Karyan
T Keri
E Kinney
A Kisselev
V Korotkov
V Kozlov
B Krauss
P Kravchenko
VG Krivokhijine
L Lagamba
L Lapikás
I Lehmann
P Lenisa
A López Ruiz
W Lorenzon
S Lu
X Lu
B-Q Ma
D Mahon
NCR Makins
SI Manaenkov
L Manfré
Y Mao
B Marianski
A Martinez de la Ossa
H Marukyan
CA Miller
Y Miyachi
A Movsisyan
M Murray
A Mussgiller
E Nappi
Y Naryshkin
A Nass
M Negodaev
W-D Nowak
A Osborne
LL Pappalardo
R Perez-Benito
A Petrosyan
PE Reimer
AR Reolon
C Riedl
K Rith
G Rosner
A Rostomyan
L Rubacek
J Rubin
D Ryckbosch
A Schäfer
G Schnell
KP Schüler
B Seitz
C Shearer
T-A Shibata
V Shutov
M Stancari
M Statera
JJM Steijger
J Stewart
S Taroian
A Terkulov
R Truty
A Trzcinski
M Tytgat
Y Van Haarlem
C Van Hulse
D Veretennikov
V Vikhrov
I Vilardi
S Wang
S Yaschenko
Z Ye
S Yen
V Zagrebelnyy
D Zeiler
B Zihlmann
P Zupranski

DOI

10.1007/jhep10(2012)042

eISSN

1029-8479

Ausgabe der Veröffentlichung

Zeitschrift

Journal of High Energy Physics

Sprache

Artikelnummer

Online publication date

2012

Datum der Veröffentlichung

2012

Status

Published

Herausgeber

Springer Science and Business Media LLC

Herausgeber URL

http://dx.doi.org/10.1007/jhep10(2012)042

Datum der Datenerfassung

2022

Titel

Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction

Ausgabe der Zeitschrift

2012

Data source: Crossref

Abstract

The beam-helicity asymmetry in exclusive electroproduction of real photons by the longitudinally polarized HERA positron beam scattering off an unpolarized hydrogen target is measured at HERMES. The asymmetry arises from deeply virtual Compton scattering and its interference with the Bethe--Heitler process. Azimuthal amplitudes of the beam-helicity asymmetry are extracted from a data sample consisting of $ep\rightarrow ep\gamma$ events with detection of all particles in the final state including the recoiling proton. The installation of a recoil detector, while reducing the acceptance of the experiment, allows the elimination of background from $ep\rightarrow eN\pi\gamma$ events, which was estimated to contribute an average of about 12% to the signal in previous HERMES publications. The removal of this background from the present data sample is shown to increase the magnitude of the leading asymmetry amplitude by 0.054 +/- 0.016 to -0.328 +/- 0.027 (stat.) +/- 0.045 (syst.).

Autoren