Measurement of the $WW+WZ$ Production Cross Section in a Semileptonic Decay Mode at CDF.
Author | : |
Publisher | : |
Total Pages | : 122 |
Release | : 2010 |
ISBN-10 | : OCLC:873640221 |
ISBN-13 | : |
Rating | : 4/5 ( Downloads) |
Download or read book Measurement of the $WW+WZ$ Production Cross Section in a Semileptonic Decay Mode at CDF. written by and published by . This book was released on 2010 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of the WW + WZ production cross section in a semileptonic decay mode is presented. The measurement is carried out with 4.6 fb−1 of integrated luminosity collected by the CDF II detector in √s = 1.96 TeV proton-antiproton collisions at the Tevatron. The main experimental challenge is identifying the signal in the overwhelming background from W+jets production. The modeling of the W+jets background is carefully studied and a matrix element technique is used to build a discriminant to separate signal and background. The cross section of WW + WZ production is measured to be [sigma](p{bar p} → WW + WZ) = 16.5{sub -3.0}{sup +3.3} pb, in agreement with the next-to-leading order theoretical prediction of 15.1 ± 0.9 pb. The significance of the signal is evaluated to be 5.4[sigma]. This measurement is an important milestone in the search for the Standard Model Higgs boson at the Tevatron.