EFFECTS OF TERRESTRIAL TIDES ON THE LEP BEAM ENERGY

被引：21

作者：

ARNAUDON, L

DEHNING, B

HOFMANN, A

GROSSEWIESMANN, P

JACOBSEN, R

KOUTCHOUK, JP

MILES, J

OLSEN, R

PLACIDI, M

SCHMIDT, R

WENNINGER, J

ASSMANN, R

BLONDEL, A

FISCHER, GE

机构：

[1] MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY

[2] ECOLE POLYTECH,F-75230 PARIS,FRANCE

[3] STANFORD UNIV,STANFORD,CA 94309

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1995年 / 357卷 / 2-3期

关键词：

D O I：

10.1016/0168-9002(94)01526-0

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The circular e(+)e(-) collider LEP located near Geneva is used to investigate the properties of the Z boson. The measurements of the Z boson mass and resonance width are of fundamental importance for the standard model of the electroweak interactions. They require a knowledge of the LEP beam energy with a precision of similar to 20 ppm, which is provided by a measurement of the electron spin precession frequency. To extrapolate beam energy calibrations over a longer period of time, effects causing energy changes have to be taken into account. Among these are the terrestrial tides due to the sun and moon which move the Earth surface up and down. The lateral components of this motion modify the 26.7 km LEP circumference by about 1 mm. This change in length results in variations of the beam energy up to 120 ppm. We present results of measurements on the influence of terrestrial tides on the LEP beam energy that have been performed in 1992 and 1993.

引用

页码：249 / 252

页数：4

共 20 条

[1]

Glashow, Nucl. Phys., 22, (1961)

[2]

Salam, Elementary Particle Theory: Relativistic Groups and Analiticity, (1968)

[3]

Weinberg, Phys. Rev. Lett., 19, (1967)

[4]

Veltman, Nucl. Phys. B, 123, (1977)

[5]

Electroweak parameters of the Z0 resonance and the standard model, Physics Letters B, 276, (1992)

[6]

Knudsen, Et al., Phys. Lett. B, 270, (1991)

[7]

Arnaudon, Et al., Phys. Lett. B, 284, (1992)

[8]

Working Group on LEP Energy and the LEP collaborations, Physics Letters B, 307, (1993)

[9]

Fisher, Hofmann, Proc. 2nd Workshop on LEP performance, CERN SL/92-29, (1992)

[10]

Placidi, Et al., Proc. 3rd Workshop on LEP performance, CERN SL/93-19, (1993)

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