Single-spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons on transversely polarized protons - INSPIRE

DataBETA

Single-spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons on transversely polarized protons

HERMES

Collaboration

•

A. Airapetian
(
- Giessen U. and
- Michigan U.
)

Jul, 2009

7 pages

Published in:

Phys.Lett.B 682 (2010) 345-350

e-Print:

0907.2596 [hep-ex]

DOI:

10.1016/j.physletb.2009.11.039

Report number:

DESY-09-106

Experiments:

DESY-HERA-HERMES

View in:

ADS Abstract Service

reference search76 citations

Citations per year

Abstract: (Elsevier)

Exclusive electroproduction of π+ mesons was studied by scattering 27.6 GeV positrons or electrons off a transversely polarized hydrogen target. The single-spin azimuthal asymmetry with respect to target polarization was measured as a function of the Mandelstam variable t , the Bjorken scaling variable xB , and the virtuality Q2 of the exchanged photon. The extracted Fourier components of the asymmetry were found to be consistent with zero, except one that was found to be large and that involves interference of contributions from longitudinal and transverse virtual photons.

Note:

7 pages, 2 figures

13.60.-r
14.40.Aq
14.20.Dh
13.85.Lg
13.60.Le
electron p: exclusive reaction
pi+: electroproduction
hydrogen: polarized target: transverse
spin: asymmetry
photon: polarization

References(32)

Figures(2)

Wave functions, evolution equations and evolution kernels from light ray operators of QCD

Dieter Müller
(
- Leipzig U.
)
,
D. Robaschik
(
- Leipzig U.
)
,
B. Geyer
(
- Leipzig U.
)
,
F.-M. Dittes
(
- Forschungszentrum Dresden Rossendorf
)
,
J. Hořejši
(
- Charles U.
)

- Fortsch.Phys. 42 (1994) 101-141
•
e-Print:
- hep-ph/9812448
•
DOI:
- 10.1002/prop.2190420202

Scaling limit of deeply virtual Compton scattering

A.V. Radyushkin
(
- Old Dominion U. and
- Jefferson Lab
)

- Phys.Lett.B 380 (1996) 417-425
•
e-Print:
- hep-ph/9604317
•
DOI:
- 10.1016/0370-2693(96)00528-X

Gauge-Invariant Decomposition of Nucleon Spin

Xiang-Dong Ji
(
- MIT, LNS and
- Washington U., Seattle
)

- Phys.Rev.Lett. 78 (1997) 610-613
•
e-Print:
- hep-ph/9603249
•
DOI:
- 10.1103/PhysRevLett.78.610

Impact parameter dependent parton distributions and off forward parton distributions for zeta ---> 0

Matthias Burkardt
(
- New Mexico State U.
)

- Phys.Rev.D 62 (2000) 071503,
- Phys.Rev.D 66 (2002) 119903 (erratum)
•
e-Print:
- hep-ph/0005108
•
DOI:
- 10.1103/PhysRevD.62.071503

Generalized parton distributions in impact parameter space

M. Diehl
(
- Aachen, Tech. Hochsch.
)

- Eur.Phys.J.C 25 (2002) 223-232,
- Eur.Phys.J.C 31 (2003) 277-278 (erratum)
•
e-Print:
- hep-ph/0205208
•
DOI:
- 10.1007/s10052-002-1016-9

Femtophotography of protons to nuclei with deeply virtual Compton scattering

John P. Ralston
(
- Ecole Polytechnique and
- Kansas U.
)
,
Bernard Pire
(
- Ecole Polytechnique
)

- Phys.Rev.D 66 (2002) 111501
•
e-Print:
- hep-ph/0110075
•
DOI:
- 10.1103/PhysRevD.66.111501

Nucleon hologram with exclusive leptoproduction

Andrei V. Belitsky
(
- Maryland U.
)
,
Dieter Mueller
(
- Wuppertal U.
)

- Nucl.Phys.A 711 (2002) 118-126,
- In *Newport News 2002, Exclusive processes at high momentum transfer* 87-98,
- In *Newport News 2002, The structure of baryons* 371-382,
•
e-Print:
- hep-ph/0206306
•
DOI:
- 10.1016/S0375-9474(02)01202-2

Impact parameter space interpretation for generalized parton distributions

Matthias Burkardt
(
- New Mexico State U.
)

- Int.J.Mod.Phys.A 18 (2003) 173-208
•
e-Print:
- hep-ph/0207047
•
DOI:
- 10.1142/S0217751X03012370

Factorization for hard exclusive electroproduction of mesons in QCD

John C. Collins
(
- Penn State U. and
- CERN
)
,
Leonid Frankfurt
(
- Tel Aviv U.
)
,
Mark Strikman
(
- Penn State U.
)

- Phys.Rev.D 56 (1997) 2982-3006
•
e-Print:
- hep-ph/9611433
•
DOI:
- 10.1103/PhysRevD.56.2982

Hard exclusive reactions and the structure of hadrons

K. Goeke
(
- Ruhr U., Bochum
)
,
Maxim V. Polyakov
(
- Ruhr U., Bochum and
- St. Petersburg, INP
)
,
M. Vanderhaeghen
(
- Mainz U., Inst. Kernphys.
)

- Prog.Part.Nucl.Phys. 47 (2001) 401-515
•
e-Print:
- hep-ph/0106012
•
DOI:
- 10.1016/S0146-6410(01)00158-2

Generalized parton distributions

M. Diehl
(
- DESY
)

- Phys.Rept. 388 (2003) 41-277
•
e-Print:
- hep-ph/0307382
•
DOI:
- 10.1016/j.physrep.2003.08.002

Unraveling hadron structure with generalized parton distributions

A.V. Belitsky
(
- Arizona State U.
)
,
A.V. Radyushkin
(
- Jefferson Lab and
- Old Dominion U.
)

- Phys.Rept. 418 (2005) 1-387
•
e-Print:
- hep-ph/0504030
•
DOI:
- 10.1016/j.physrep.2005.06.002

Hard exclusive pseudoscalar meson electroproduction and spin structure of a nucleon

L.L. Frankfurt
(
- Tel Aviv U. and
- St. Petersburg, INP
)
,
P.V. Pobylitsa
(
- St. Petersburg, INP and
- Ruhr U., Bochum
)
,
Maxim V. Polyakov
(
- St. Petersburg, INP and
- Ruhr U., Bochum
)
,
M. Strikman
(
- St. Petersburg, INP and
- Penn State U. and
- DESY
)

- Phys.Rev.D 60 (1999) 014010
•
e-Print:
- hep-ph/9901429
•
DOI:
- 10.1103/PhysRevD.60.014010

Hard exclusive electroproduction of decuplet baryons in the large N(c) limit

L.L. Frankfurt
(
- Tel Aviv U.
)
,
Maxim V. Polyakov
(
- St. Petersburg, INP and
- Ruhr U., Bochum
)
,
M. Strikman
(
- Penn State U.
)
,
M. Vanderhaeghen
(
- Mainz U., Inst. Kernphys.
)

- Phys.Rev.Lett. 84 (2000) 2589-2592
•
e-Print:
- hep-ph/9911381
•
DOI:
- 10.1103/PhysRevLett.84.2589

Next-to-leading order corrections in exclusive meson production

M. Diehl
(
- DESY
)
,
W. Kugler
(
- DESY
)

- Eur.Phys.J.C 52 (2007) 933-966
•
e-Print:
- 0708.1121
•
DOI:
- 10.1140/epjc/s10052-007-0423-3

An Attempt to understand exclusive pi+ electroproduction

S.V. Goloskokov
(
- Dubna, JINR
)
,
P. Kroll
(
- Wuppertal U. and
- Regensburg U.
)

- Eur.Phys.J.C 65 (2010) 137-151
•
e-Print:
- 0906.0460
•
DOI:
- 10.1140/epjc/s10052-009-1178-9

On the analysis of lepton scattering on longitudinally or transversely polarized protons

M. Diehl
(
- DESY
)
,
S. Sapeta
(
- Jagiellonian U.
)

- Eur.Phys.J.C 41 (2005) 515-533
•
e-Print:
- hep-ph/0503023
•
DOI:
- 10.1140/epjc/s2005-02242-9

Single-spin asymmetries: The Trento conventions

Alessandro Bacchetta
(
- Regensburg U.
)
,
Umberto D'Alesio
(
- Cagliari U. and
- INFN, Cagliari
)
,
Markus Diehl
(
- DESY
)
,
C.Andy Miller
(
- TRIUMF
)

- Phys.Rev.D 70 (2004) 117504
•
e-Print:
- hep-ph/0410050
•
DOI:
- 10.1103/PhysRevD.70.117504

Generic modelling of non-perturbative quantities and a description of hard exclusive pi+ electroproduction

C. Bechler
(
- Ruhr U., Bochum
)
,
Dieter Mueller
(
- Ruhr U., Bochum
)

e-Print:
- 0906.2571

Deep exclusive electroproduction of pi+ from data measured with the HERMES detector at DESY

Murat M. Kaskulov
(
- Giessen U.
)
,
Ulrich Mosel
(
- Giessen U.
)

- Phys.Rev.C 80 (2009) 028202
•
e-Print:
- 0904.4442
•
DOI:
- 10.1103/PhysRevC.80.028202

Cross-sections for hard exclusive electroproduction of pi+ mesons on a hydrogen target

HERMES

Collaboration

•

A. Airapetian
(
- Michigan U.
)

et al.

- Phys.Lett.B 659 (2008) 486-492
•
e-Print:
- 0707.0222
•
DOI:
- 10.1016/j.physletb.2007.11.079

Single spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons

HERMES

Collaboration

•

A. Airapetian

et al.

- Phys.Lett.B 535 (2002) 85-92
•
e-Print:
- hep-ex/0112022
•
DOI:
- 10.1016/S0370-2693(02)01780-X

The HERMES spectrometer

HERMES

Collaboration

•

K. Ackerstaff

et al.

- Nucl.Instrum.Meth.A 417 (1998) 230-265
•
e-Print:
- hep-ex/9806008
•
DOI:
- 10.1016/S0168-9002(98)00769-4

The HERMES polarized atomic beam source

A. Nass
(
- Erlangen - Nuremberg U.
)
,
C. Baumgarten
(
- Munich U.
)
,
B. Braun
(
- Erlangen - Nuremberg U. and
- Munich U.
)
,
G. Ciullo
(
- Ferrara U. and
- INFN, Ferrara
)
,
G. Court
(
- Liverpool U.
)

et al.

- Nucl.Instrum.Meth.A 505 (2003) 633-644
•
DOI:
- 10.1016/S0168-9002(03)00986-0

The HERMES polarized hydrogen and deuterium gas target in the HERA electron storage ring

HERMES

Collaboration

•

A. Airapetian

et al.

- Nucl.Instrum.Meth.A 540 (2005) 68-101
•
e-Print:
- physics/0408137
•
DOI:
- 10.1016/j.nima.2004.11.020

1-25 of 32
1
2
25 / page