Measurement of the neutral weak form factors of the proton

被引：156

作者：

Aniol, KA ^{[1
]}

Armstrong, DS

Baylac, M

Burtin, E

Calarco, J

Cates, GD

Cavata, C

Chen, JP

Chudakov, E

Dale, D

de Jager, CW

Deur, A

Djawotho, P

Epstein, MB

Escoffier, S

Ewell, L

Falletto, N

Finn, JM

Fissum, K

Fleck, A

Frois, B

Gao, J

Garibaldi, F

Gasparian, A

Gerstner, GM

Gilman, R

Glamazdin, A

Gomez, J

Gorbenko, V

Hansen, O

Hersman, F

Holmes, R

Holtrop, M

Humensky, B

Incerti, S

Jardillier, J

Jones, MK

Jorda, J

Jutier, C

Kahl, W

Kim, DH

Kim, MS

Kramer, K

Kumar, KS

Kuss, M

LeRose, J

Leuschner, M

Lhuillier, D

Liyanage, N

Lourie, R

机构：

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

[2] Univ Blaise Pascal, IN2P3, LPC, F-63177 Clermont Ferrand, France

[3] Hampton Univ, Hampton, VA 23668 USA

[4] Harvard Univ, Cambridge, MA 02138 USA

[5] Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy

[6] Thomas Jefferson Natl Accelerator Lab, Newport News, VA 23606 USA

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

[8] Univ Kentucky, Lexington, KY 40506 USA

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

[10] Kyungpook Natl Univ, Taegu 702701, South Korea

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

[12] MIT, Cambridge, MA 02139 USA

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

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

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

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

[17] Princeton Univ, Princeton, NJ 08544 USA

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

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

[20] CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France

[21] SUNY Stony Brook, Stony Brook, NY 11794 USA

[22] Syracuse Univ, Syracuse, NY 13244 USA

[23] Temple Univ, Philadelphia, PA 19122 USA

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

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.82.1096

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from the proton. The kinematic point [[theta(1ab)] = 12.3 degrees and [Q(2)] = 0.48 (GeV/c)(2)] is chosen to provide sensitivity, at a level that is of theoretical interest, to the strange electric form factor G(E)(s). The result, A = -14.5 +/- 2.2 ppm, is consistent with the electroweak standard model and no additional contributions from strange quarks. In particular, the measurement implies G(E)(s) + 0.39G(M)(s) = 0.023 +/- 0.034(stat) +/- 0.022(syst) +/- 0.026(delta G(E)(n)), where the last uncertainty arises from the estimated uncertainty in the neutron electric form factor. [S0031-9007(98)08312-4].

引用

页码：1096 / 1100

页数：5

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