Two-photon exchange contribution to elastic electron-nucleonscattering at large momentum transfer

被引：165

作者：

Afanasev, AV ^{[1
]}

Brodsky, SJ

Carlson, CE

Chen, YC

Vanderhaeghen, M

机构：

[1] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[2] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[3] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[4] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

来源：

PHYSICAL REVIEW D | 2005年 / 72卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.72.013008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We estimate the two-photon exchange contribution to elastic electron-proton scattering at large momentum transfer by using a quark-parton representation of virtual Compton scattering. We thus can relate the two-photon exchange amplitude to the generalized parton distributions which also enter in other wide-angle scattering processes. We find that the interference of one- and two-photon exchange contribution is able to substantially resolve the difference between electric form factor measurements from Rosenbluth and polarization transfer experiments. Two-photon exchange has additional consequences which could be experimentally observed, including nonzero polarization effects and a positron-proton/electron-proton scattering asymmetry. The predicted Rosenbluth plot is no longer precisely linear; it acquires a measurable curvature, particularly at large laboratory angle.

引用

页码：1 / 18

页数：18

共 71 条

[1] Model independent radiative corrections in processes of polarized electron-nucleon elastic scattering [J].

Afanasev, A ;

Akushevich, I ;

Merenkov, N .

PHYSICAL REVIEW D, 2001, 64 (11)

[2]

AFANASEV A, HEPPH0208260

[3] Large logarithms in the beam normal spin asymmetry of elastic electron-proton scattering [J].

Afanasev, AV ;

Merenkov, NP .

PHYSICAL REVIEW D, 2004, 70 (07)

[4] Collinear photon exchange in the beam normal polarization asymmetry of elastic electron-proton scattering [J].

Afanasev, AV ;

Merenkov, NP .

PHYSICS LETTERS B, 2004, 599 (1-2) :48-54

[5]

Akhiezer A.I., 1973, SOV J PART NUCL, V4, P277

[6]

AKHIEZER AI, 1958, SOV PHYS JETP-USSR, V6, P588

[7] MEASUREMENTS OF THE ELECTRIC AND MAGNETIC FORM-FACTORS OF THE PROTON FROM Q(2)=1.75 TO 8.83 (GEV/C)(2) [J].

ANDIVAHIS, L ;

BOSTED, PE ;

LUNG, A ;

STUART, LM ;

ALSTER, J ;

ARNOLD, RG ;

CHANG, CC ;

DIETRICH, FS ;

DODGE, W ;

GEARHART, R ;

GOMEZ, J ;

GRIFFIOEN, KA ;

HICKS, RS ;

HYDEWRIGHT, CE ;

KEPPEL, C ;

KUHN, SE ;

LICHTENSTADT, J ;

MISKIMEN, RA ;

PETERSON, GA ;

PETRATOS, GG ;

ROCK, SE ;

ROKNI, S ;

SAKUMOTO, WK ;

SPENGOS, M ;

SWARTZ, K ;

SZALATA, Z ;

TAO, LH .

PHYSICAL REVIEW D, 1994, 50 (09) :5491-5517

[8] POLARIZATION TRANSFER IN ELASTIC ELECTRON-SCATTERING FROM NUCLEONS AND DEUTERONS [J].

ARNOLD, RG ;

CARLSON, CE ;

GROSS, F .

PHYSICAL REVIEW C, 1981, 23 (01) :363-374

[9] How well do we know the electromagnetic form factors of the proton? [J].

Arrington, J .

PHYSICAL REVIEW C, 2003, 68 (03) :343251-3432514

[10]

ARRINGTON J, NUCLEX0312017 LAB

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