1ST OBSERVATION OF TRANSVERSE BEAM POLARIZATION IN LEP

被引:35
作者
KNUDSEN, L
KOUTCHOUK, JP
PLACIDI, M
SCHMIDT, R
CROZON, M
BADIER, J
BLONDEL, A
DEHNING, B
机构
[1] COLL FRANCE,PHYS CORPUSCULAIRE LAB,CNRS,IN2P3,F-75231 PARIS,FRANCE
[2] ECOLE POLYTECH,PHYS NUCL & HAUTES ENERGIES LAB,CNRS,IN2P3,F-91128 PALAISEAU,FRANCE
[3] MAX PLANCK INST PHYS & ASTROPHYS,WERNER HEISENBERG INST PHYS,W-8000 MUNICH,GERMANY
关键词
D O I
10.1016/0370-2693(91)91545-7
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The results of beam polarization measurements performed in 1990 at the CERN Large Electron Positron storage ring (LEP) are reported. A significant asymmetry was observed in the Compton back-scattered photon distribution when illuminating the LEP electron beam with circularly polarized laser light. The corresponding polarization level is estimated to be 9.1% +/- 0.3% (statistical) +/- 1.8% (systematic). The validity of the polarization signal was assessed by varying the laser light polarization and by applying to the electron beam known depolarizing resonances. The measurement is consistent with the predicted polarization degree.
引用
收藏
页码:97 / 104
页数:8
相关论文
共 26 条
[1]  
ACKERMANN A, UNPUB
[2]  
ALEXANDER G, 1988, CERN8806 REP, V2
[3]  
ALEXANDER G, 1988, CERN8806 REP, V1
[4]  
BAIER VN, 1969, SOV J NUCL PHYS+, V9, P238
[5]  
BARBAGLI G, 1990, SEP HIGH EN SPIN PHY
[6]  
BLONDEL A, 1990, LEP629 NOT
[7]   RADIATIVE-CORRECTIONS TO POLARIZED E-E+ ANNIHILATION IN THE STANDARD ELECTROWEAK MODEL [J].
BOHM, M ;
HOLLIK, W .
NUCLEAR PHYSICS B, 1982, 204 (01) :45-77
[8]  
BOVET C, 1986, PHYSICS LEP, P58
[9]  
DARRIULAT P, 1979, SUM P LEP SUMM STUD, P219
[10]  
HOFMANN A, 1990, 2ND EUR PART ACC C N