Proton elastic form factor ratios to Q2=3.5 GeV2 by polarization transfer -: art. no. 055202

被引：384

作者：

Punjabi, V ^{[1
]}

Perdrisat, CF

Aniol, KA

Baker, FT

Berthot, J

Bertin, PY

Bertozzi, W

Besson, A

Bimbot, L

Boeglin, WU

Brash, EJ

Brown, D

Calarco, JR

Cardman, LS

Chai, Z

Chang, CC

Chen, JP

Chudakov, E

Churchwell, S

Cisbani, E

Dale, DS

Leo, RD

Deur, A

Diederich, B

Domingo, JJ

Epstein, MB

Ewell, LA

Fissum, KG

Fleck, A

Fonvieille, H

Frullani, S

Gao, J

Garibaldi, F

Gasparian, A

Gerstner, G

Gilad, S

Gilman, R

Glamazdin, A

Glashausser, C

Gomez, J

Gorbenko, V

Green, A

Hansen, JO

Howell, CR

Huber, GM

Iodice, M

de Jager, CW

Jaminion, S

Jiang, X

Jones, MK

机构：

[1] Norfolk State Univ, Norfolk, VA 23504 USA

[2] Coll William & Mary, Williamsburg, VA 23187 USA

[3] Rutgers State Univ, Piscataway, NJ 08855 USA

[4] Univ Georgia, Athens, GA 30602 USA

[5] Univ Regina, Regina, SK S4S 0A2, Canada

[6] Univ Clermont Ferrand, CNRS, IN2P3, F-63117 Aubiere, France

[7] Calif State Univ Los Angeles, Los Angeles, CA 90032 USA

[8] Duke Univ, Durham, NC 27708 USA

[9] TUNL, Durham, NC 27708 USA

[10] Eastern Kentucky Univ, Richmond, KY 40475 USA

[11] Florida Int Univ, Miami, FL 33199 USA

[12] Florida State Univ, Tallahassee, FL 32306 USA

[13] Hampton Univ, Hampton, VA 23668 USA

[14] Univ Bari, I-70126 Bari, Italy

[15] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[16] Ist Super Sanita, I-00161 Rome, Italy

[17] Joint Inst Nucl Res, LHE, Dubna 141980, Russia

[18] Kent State Univ, Kent, OH 44242 USA

[19] Univ Kentucky, Lexington, KY 40506 USA

[20] Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine

[21] CNRS, Lab Phys Subatom & Cosmol, IN2P3, F-38026 St Martin Dheres, France

[22] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada

[23] Univ Maryland, College Pk, MD 20742 USA

[24] MIT, Cambridge, MA 02139 USA

[25] Univ New Hampshire, Durham, NH 03824 USA

[26] N Carolina Cent Univ, Durham, NC 27707 USA

[27] Old Dominion Univ, Norfolk, VA 23508 USA

[28] Inst Phys Nucl, F-91406 Orsay, France

[29] CEA Saclay, F-91191 Gif Sur Yvette, France

[30] Syracuse Univ, Syracuse, NY 13244 USA

[31] Temple Univ, Philadelphia, PA 19122 USA

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

[33] Tohoku Univ, Sendai, Miyagi 980, Japan

[34] Univ Virginia, Charlottesville, VA 22901 USA

[35] Univ Western Cape, Cape Town, South Africa

[36] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW C | 2005年 / 71卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevC.71.055202

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：

The ratio of the proton elastic electromagnetic form factors, G(Ep)/G(Mp), was obtained by measuring P-t and P-l, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic e(->)p -> ep(->)reaction in the four-momentum transfer squared range of 0.5 to 3.5 GeV2. In the single-photon exchange approximation, G(Ep)/G(Mp) is directly proportional to P-t/P-l. The simultaneous measurement of P-t and P-l in a polarimeter reduces systematic uncertainties. The results for G(Ep)/G(Mp) show a systematic decrease with increasing Q(2), indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been reanalyzed and their systematic uncertainties have become significantly smaller than those reported previously.

引用

页数：27

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