The ratio of e±p scattering cross sections predicted from the global fit of elastic ep data

被引：7

作者：

Alberico, W. M. ^{[1
,2
]}

Bilenky, S. M. ^{[3
,4
]}

Giunti, C. ^{[1
,2
]}

Graczyk, K. M. ^{[1
,2
,5
]}

机构：

[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[3] JINR, BLTP, RU-141980 Dubna, Russia

[4] Tech Univ Munich, Phys Dept E15, D-85748 Garching, Germany

[5] Univ Wroclaw, Inst Theoret Phys, PL-50204 Wroclaw, Poland

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2009年 / 36卷 / 11期

关键词：

ELECTRON-PROTON; 2-PHOTON-EXCHANGE;

D O I：

10.1088/0954-3899/36/11/115009

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present predictions for the value of the cross section ratio sigma(e(+) p -> e(+) p)/sigma(e(-) p -> e(-) p), determined from our fit of the elastic ep cross section and polarization data. In this fit, we took into account the phenomenological two-photon exchange dispersive correction. The cross section ratios which are expected to be measured by the VEPP-3 experiment are computed. The kinematical region which will be covered by the E04-116 JLab experiment is also considered. It is shown that for both experiments the predicted cross section ratios deviate from unity by more than 3 sigma.

引用

页数：7

共 26 条

[1] Two-photon exchange contribution to elastic electron-nucleonscattering at large momentum transfer [J].

Afanasev, AV ;

Brodsky, SJ ;

Carlson, CE ;

Chen, YC ;

Vanderhaeghen, M .

PHYSICAL REVIEW D, 2005, 72 (01) :1-18

[2] Electromagnetic form factors of the nucleon: New fit and analysis of uncertainties [J].

Alberico, W. M. ;

Bilenky, S. M. ;

Giunti, C. ;

Graczyk, K. M. .

PHYSICAL REVIEW C, 2009, 79 (06)

[3] 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

[4] Extraction of two-photon contributions to the proton form factors [J].

Arrington, J .

PHYSICAL REVIEW C, 2005, 71 (01)

[5] Evidence for two-photon exchange contributions in electron-proton and positron-proton elastic scattering [J].

Arrington, J .

PHYSICAL REVIEW C, 2004, 69 (03) :032201-1

[6]

Arrington J, 2004, ARXIVNUCLEX0408020

[7] Two-photon exchange and elastic electron-proton scattering [J].

Blunden, PG ;

Melnitchouk, W ;

Tjon, JA .

PHYSICAL REVIEW LETTERS, 2003, 91 (14)

[8] Phenomenological analysis of two-photon exchange effects in proton form factor measurements [J].

Borisyuk, Dmitry ;

Kobushkin, Alexander .

PHYSICAL REVIEW C, 2007, 76 (02)

[9] Perturbative QCD predictions for two-photon exchange [J].

Borisyuk, Dmitry ;

Kobushkin, Alexander .

PHYSICAL REVIEW D, 2009, 79 (03)

[10]

BROOKS WK, E0411L JEFF LAB

← 1 2 3 →