Measurement of differential cross sections in the kinematic angular variable ϕ * for inclusive Z boson production in pp collisions at √s=8 TeV

• Main Authors: Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English; English
• Published: Springer Nature 2018
• Subjects: QA Mathematics; QA155 Algebra; QC Physics
• Online Access: http://irep.iium.edu.my/64770/1/64770_Measurement%20of%20differential%20cross%20sections_article.pdf; http://irep.iium.edu.my/64770/2/64770_Measurement%20of%20differential%20cross%20sections_scopus.pdf; http://irep.iium.edu.my/64770/13/64770__Measurement%20of%20differential%20cross%20sections%20in%20the%20kinematic%20angular%20variable_WoS.pdf; http://irep.iium.edu.my/64770/; https://link.springer.com/content/pdf/10.1007%2FJHEP03%282018%29172.pdf

Measurements of differential cross sections dσ/dφ ∗ and double-differential cross sections d2σ/dφ ∗d|y| for inclusive Z boson production are presented using the dielectron and dimuon final states. The kinematic observable φ ∗ correlates with the dilepton transverse momentum but has better resolution, and y is the dilepton rapidity. The analysis is based on data collected with the CMS experiment at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.7 fb−1 . The normalised cross section (1/σ) dσ/dφ ∗ , within the fiducial kinematic region, is measured with a precision of better than 0.5% for φ ∗ < 1. The measurements are compared to theoretical predictions and they agree, typically, within few percent.