First Measurement Of The Left Right Z Cross Section Asymmetry In Polarized Ee Collisions At The Slc

Download or read book First Measurement of the Left-right Z Cross Section Asymmetry in Polarized Ee− Collisions at the SLC. written by and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SLAC Linear Collider (SLC) has recently been upgraded to produce, accelerate, and collide a spin polarized electron beam. The average beam polarization during the 1992 run was (22.4 ± 0.7)%. The SLD Collaboration used the polarized beam to perform the first measurement of the left-right cross section asymmetry (A{sub LR}) for Z boson production by ee− collisions. The measurement was performed at a center-of-mass energy of 91.55 GeV with a sample of 10,224 Z decays. The measured value of A{sub LR} is 0.100 ± 0.044(stat.) ± O.004(syst.) which determines the effective weak mixing angle to be sin2?{sub W}{sup eff} = 0.2378 ± 0.0056(stat.) ± 0.0005(syst.).