New Precision Limit on the Strange Vector Form Factors of the Proton - INSPIRE

DataBETA

New Precision Limit on the Strange Vector Form Factors of the Proton

HAPPEX

Collaboration

Jul, 2011

5 pages

Published in:

Phys.Rev.Lett. 108 (2012) 102001

e-Print:

1107.0913 [nucl-ex]

DOI:

10.1103/PhysRevLett.108.102001

Report number:

JLAB-PHY-11-1479

Experiments:

JLAB-E-99-115

View in:

reference search126 citations

Citations per year

Abstract: (arXiv)

The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q2 = 0.624 GeV and beam energy E =3.48 GeV to be A_PV = -23.80 +/- 0.78 (stat) +/- 0.36 (syst) parts per million. This result is consistent with zero contribution of strange quarks to the combination of electric and magnetic form factors G_E^s + 0.517 G_M^s = 0.003 +/- 0.010 (stat) +/- 0.004 (syst) +/- 0.009 (ff), where the third error is due to the limits of precision on the electromagnetic form factors and radiative corrections. With this measurement, the world data on strange contributions to nucleon form factors are seen to be consistent with zero and not more than a few percent of the proton form factors.

Note:

5 pages, 3 figures

13.60.Fz
13.40.Gp
11.30.Er
14.20.Dh
p: form factor
form factor: electric
form factor: magnetic
cross section: asymmetry: measured
radiative correction
electron p: elastic scattering

References(21)

Figures(0)

A Measurement of the Spin Asymmetry and Determination of the Structure Function g(1) in Deep Inelastic Muon-Proton Scattering

European Muon

Collaboration

•

J. Ashman
(
- Sheffield U.
)

et al.

- Phys.Lett.B 206 (1988) 364,
•
DOI:
- 10.1016/0370-2693(88)91523-7

Strange Matrix Elements in the Proton from Neutral Current Experiments

David B. Kaplan
(
- Harvard U.
)
,
Aneesh Manohar
(
- MIT, LNS
)

- Nucl.Phys.B 310 (1988) 527-547
•
DOI:
- 10.1016/0550-3213(88)90090-9

Hadronic Uncertainties in the Elastic Scattering of Supersymmetric Dark Matter

- Phys.Rev.D 77 (2008) 065026
•
e-Print:
- 0801.3656
•
DOI:
- 10.1103/PhysRevD.77.065026

The Strange parton distribution of the nucleon: Global analysis and applications

H.L. Lai
(
)
,
Pavel M. Nadolsky
(
- Argonne
)
,
J. Pumplin
(
- Michigan State U.
)
,
D. Stump
(
- Michigan State U.
)
,
W.K. Tung
(
- Michigan State U. and
- Washington U., Seattle
)

et al.

- JHEP 04 (2007) 089
•
e-Print:
- hep-ph/0702268
•
DOI:
- 10.1088/1126-6708/2007/04/089

Neutrino dimuon production and the strangeness asymmetry of the nucleon

F. Olness
(
- Southern Methodist U.
)
,
J. Pumplin
(
- Michigan State U.
)
,
D. Stump
(
- Michigan State U.
)
,
J. Huston
(
- Michigan State U.
)
,
Pavel M. Nadolsky
(
- Southern Methodist U.
)

et al.

- Eur.Phys.J.C 40 (2005) 145-156
•
e-Print:
- hep-ph/0312323
•
DOI:
- 10.1140/epjc/s2004-02099-4

Sensitivity of polarized elastic electron-proton scattering to the anomalous baryon number magnetic moment

R.D. Mckeown
(
- Caltech
)

- Phys.Lett.B 219 (1989) 140-142,
- Phys.Lett.B 219 (1989) 140-142
•
DOI:
- 10.1016/0370-2693(89)90364-X

Strange quark contributions to parity-violating asymmetries in the forward G0 electron-proton scattering experiment

G0

Collaboration

•

D.S. Armstrong
(
- William-Mary Coll.
)

et al.

- Phys.Rev.Lett. 95 (2005) 092001
•
e-Print:
- nucl-ex/0506021
•
DOI:
- 10.1103/PhysRevLett.95.092001

Measurement of strange quark contributions to the nucleon's form-factors at Q2 = 0.230-(GeV/c)2

A4

Collaboration

•

F.E. Maas
(
- Mainz U., Inst. Kernphys.
)

et al.

- Phys.Rev.Lett. 93 (2004) 022002
•
e-Print:
- nucl-ex/0401019
•
DOI:
- 10.1103/PhysRevLett.93.022002

Evidence for strange quark contributions to the nucleon's form-factors at q2 = 0.108 (GeV/c)2

F.E. Maas
(
- Mainz U., Inst. Kernphys.
)
,
K. Aulenbacher
(
- Mainz U., Inst. Kernphys.
)
,
S. Baunack
(
- Mainz U., Inst. Kernphys.
)
,
L. Capozza
(
- Mainz U., Inst. Kernphys.
)
,
J. Diefenbach
(
- Mainz U., Inst. Kernphys.
)

et al.

- Phys.Rev.Lett. 94 (2005) 152001
•
e-Print:
- nucl-ex/0412030
•
DOI:
- 10.1103/PhysRevLett.94.152001

Parity violating electroweak asymmetry in polarized-e p scattering

HAPPEX

Collaboration

•

K.A. Aniol
(
- Cal State, L.A.
)

et al.

- Phys.Rev.C 69 (2004) 065501
•
e-Print:
- nucl-ex/0402004
•
DOI:
- 10.1103/PhysRevC.69.065501

Precision Measurements of the Nucleon Strange Form Factors at Q2 ~ 0.1-GeV2

HAPPEX

Collaboration

•

A. Acha
(
- Florida Intl. U.
)

et al.

- Phys.Rev.Lett. 98 (2007) 032301
•
e-Print:
- nucl-ex/0609002
•
DOI:
- 10.1103/PhysRevLett.98.032301

Basic Instrumentation for Hall A at Jefferson Lab

et al.

- Nucl.Instrum.Meth.A 522 (2004) 294-346
•
DOI:
- 10.1016/j.nima.2003.11.415

Controlling helicity-correlated beam asymmetries in a polarized electron source

K.D. Paschke
(
- Virginia U. (main)
)

- Eur.Phys.J.A 32 (2007) 4, 549-553,
•
DOI:
- 10.1140/epja/i2006-10442-8

Precise determination of low-Q nucleon electromagnetic form factors and their impact on parity-violating e-p elastic scattering

John Arrington
(
- Argonne, PHY
)
,
Ingo Sick
(
- Basel U.
)

- Phys.Rev.C 76 (2007) 035201
•
e-Print:
- nucl-th/0612079
•
DOI:
- 10.1103/PhysRevC.76.035201

The Nucleon anapole moment and parity violating e p scattering

Shi-Lin Zhu
(
- Connecticut U.
)
,
S.J. Puglia
(
- Connecticut U.
)
,
Barry R. Holstein
(
- Massachusetts U., Amherst
)
,
M.J. Ramsey-Musolf
(
- Connecticut U. and
- Jefferson Lab
)

- Phys.Rev.D 62 (2000) 033008
•
e-Print:
- hep-ph/0002252
•
DOI:
- 10.1103/PhysRevD.62.033008

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

- J.Phys.G 37 (2010) 075021
•
DOI:
- 10.1088/0954-3899/37/7A/075021

Strange Quark Contributions to Parity-Violating Asymmetries in the Backward Angle G0 Electron Scattering Experiment

G0

Collaboration

•

D. Androic
(
- Zagreb U.
)

et al.

- Phys.Rev.Lett. 104 (2010) 012001
•
e-Print:
- 0909.5107
•
DOI:
- 10.1103/PhysRevLett.104.012001

Extracting nucleon strange and anapole form factors from world data

Ross Daniel Young
(
- Jefferson Lab
)
,
Julie Roche
(
- Jefferson Lab
)
,
Roger D. Carlini
(
- Jefferson Lab
)
,
Anthony William Thomas
(
- Jefferson Lab
)

- Phys.Rev.Lett. 97 (2006) 102002
•
e-Print:
- nucl-ex/0604010
•
DOI:
- 10.1103/PhysRevLett.97.102002

Global Analysis of Nucleon Strange Form Factors at Low Q**2

- Phys.Rev.C 76 (2007) 025202
•
e-Print:
- 0706.0226
•
DOI:
- 10.1103/PhysRevC.76.025202

The Strange quark contribution to the proton's magnetic moment

SAMPLE

Collaboration

•

D.T. Spayde

et al.

- Phys.Lett.B 583 (2004) 79-86
•
e-Print:
- nucl-ex/0312016
•
DOI:
- 10.1016/j.physletb.2004.01.002

Measurement of Strange Quark Contributions to the Vector Form Factors of the Proton at Q2=0.22 (GeV/c)2

et al.

- Phys.Rev.Lett. 102 (2009) 151803
•
e-Print:
- 0903.2733
•
DOI:
- 10.1103/PhysRevLett.102.151803