Measurement of the Two-Photon Exchange Contribution to the Elastic e±p Scattering Cross Sections at the VEPP-3 Storage Ring

被引：93

作者：

Rachek, I. A. ^{[1
]}

Arrington, J. ^{[2
]}

Dmitriev, V. F. ^{[1
,3
]}

Gauzshtein, V. V. ^{[4
]}

Gerasimov, R. E. ^{[1
,3
]}

Gramolin, A. V. ^{[1
]}

Holt, R. J. ^{[2
]}

Kaminskiy, V. V. ^{[1
]}

Lazarenko, B. A. ^{[1
]}

Mishnev, S. I. ^{[1
]}

Muchnoi, N. Yu. ^{[1
,3
]}

Neufeld, V. V. ^{[1
]}

Nikolenko, D. M. ^{[1
]}

Sadykov, R. Sh. ^{[1
]}

Shestakov, Yu. V. ^{[1
]}

Stibunov, V. N. ^{[4
]}

Toporkov, D. K. ^{[1
,3
]}

de Vries, H. ^{[5
]}

Zevakov, S. A. ^{[1
]}

Zhilich, V. N. ^{[1
,3
]}

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Argonne Natl Lab, Argonne, IL 60439 USA

[3] Novosibirsk State Univ, Novosibirsk 630090, Russia

[4] Tomsk Polytech Univ, Tomsk 634050, Russia

[5] Nikhef, NL-1098 XG Amsterdam, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 06期

基金：

俄罗斯基础研究基金会;

关键词：

POSITRON-PROTON; ELECTRON-PROTON; NUCLEON;

D O I：

10.1103/PhysRevLett.114.062005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ratio of the elastic e(+)p to e(-)p scattering cross sections has been measured precisely, allowing the determination of the two-photon exchange contribution to these processes. This neglected contribution is believed to be the cause of the discrepancy between the Rosenbluth and polarization transfer methods of measuring the proton electromagnetic form factors. The experiment was performed at the VEPP-3 storage ring at beam energies of 1.6 and 1.0 GeV and at lepton scattering angles between 15 degrees and 105 degrees. The data obtained show evidence of a significant two-photon exchange effect. The results are compared with several theoretical predictions.

引用

页数：5

共 40 条

[1] Akhiezer A. I., 1968, Soviet Physics - Doklady, V13, P572
[2] Akhiezer A. I., 1974, Sov. J. Part. Nucl., V4, P277
[3] POSITRON-PROTON ELASTIC SCATTERING AT 800 AND 1200 MEV
ANDERSON, RL
BORGIA, B
CASSIDAY, GL
DEWIRE, JW
ITO, AS
LOH, EC
[J]. PHYSICAL REVIEW, 1968, 166 (05): : 1336 - &
[4] SCATTERING OF POSITRONS AND ELECTRONS FROM PROTONS
ANDERSON, RL
BORGIA, B
CASSIDAY, GL
DEWIRE, JW
ITO, AS
LOH, EC
[J]. PHYSICAL REVIEW LETTERS, 1966, 17 (07) : 407 - &
[5] Nucleon electromagnetic form factors
Arrington, J.
Roberts, C. D.
Zanotti, J. M.
[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2007, 34 (07) : S23 - S51
[6] Coulomb distortion in high-Q2 elastic e-p scattering -: art. no. 028203
Arrington, J
Sick, I
[J]. PHYSICAL REVIEW C, 2004, 70 (02): : 028203 - 1
[7] Evidence for two-photon exchange contributions in electron-proton and positron-proton elastic scattering
Arrington, J
[J]. PHYSICAL REVIEW C, 2004, 69 (03): : 032201 - 1
[8] Review of two-photon exchange in electron scattering
Arrington, J.
Blunden, P. G.
Melnitchouk, W.
[J]. PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 2011, 66 (04) : 782 - 833
[9] How well do we know the electromagnetic form factors of the proton?
Arrington, J
[J]. PHYSICAL REVIEW C, 2003, 68 (03): : 343251 - 3432514
[10] Coulomb corrections in the extraction of the proton radius
Arrington, John
[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2013, 40 (11)

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