Observation of parity nonconservation in Moller scattering

被引：89

作者：

Anthony, PL ^{[1
]}

Arnold, RG

Arroyo, C

Baird, K

Bega, K

Biesiada, J

Bosted, PE

Breuer, M

Carr, R

Cates, GD

Chen, JP

Chudakov, E

Cooke, M

Decker, FJ

Decowski, P

Deur, A

Emam, W

Erickson, R

Fieguth, T

Field, C

Gao, J

Gustafsson, K

Hicks, RS

Holmes, R

Hughes, EW

Humensky, TB

Jones, GM

Kaufman, LJ

Kolomensky, YG

Kumar, KS

Lhuillier, D

Lombard-Nelsen, R

Mastromarino, P

Mayer, B

McKeown, RD

Michaels, R

Olson, M

Paschke, KD

Peterson, GA

Pitthan, R

Pope, K

Relyea, D

Rock, SE

Saxton, O

Shapiro, G

Singh, J

Souder, PA

Szalata, ZM

Tobias, WA

Tonguc, BT

机构：

[1] Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA

[2] Univ Calif Berkeley, Berkeley, CA 94720 USA

[3] CALTECH, Pasadena, CA 91125 USA

[4] Univ Massachusetts, Amherst, MA 01003 USA

[5] Princeton Univ, Princeton, NJ 08544 USA

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

[7] Smith Coll, Northampton, MA 01063 USA

[8] Syracuse Univ, Syracuse, NY 13244 USA

[9] Thomas Jefferson Lab, Newport News, VA 23606 USA

[10] Univ Virginia, Charlottesville, VA 22903 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.181602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Moller) scattering: A(PV)=[-175+/-30(stat)+/-20(syst)]x10(-9). This first direct observation of parity nonconservation in Moller scattering leads to a measurement of the electron's weak charge at low energy Q(W)(e)=-0.053+/-0.011. This is consistent with the standard model expectation at the current level of precision: sin(2)theta(W)(M-Z)((MS) over bar) = 0.2293+/-0.0024(stat)+/-0.0016(syst)+/-0.0006(theory).

引用

页码：181602 / 1

页数：4

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