2014/12/31 by V. Khachatryan, CMS Collaboration, A. M. Sirunyan +98 · 1 citation
Physics and Astronomy · #Astrophysics #Geometry #High-Energy Particle Collisions Research #Inverse #Large Hadron Collider #Luminosity #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Parton #Perturbative QCD #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Range (aeronautics) #Rapidity #hep-ex
paper · pdf · doi:10.1140/epjc/s10052-015-3364-2
published as Eur. Phys. J. C 75 (2015) 147 · Replaced with published version. Added journal reference and DOI
openalex publication_date 2015/04/01 · arxiv created 2015/04/20 · arxiv updated 2015/04/21 · openalex created_date 2017/03/23 · openalex updated_date 2026/08/06
Measurements of the differential and double-differential Drell-Yan cross sections in the dielectron and dimuon channels are presented. They are based on proton-proton collision data at [Formula: see text] recorded with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7[Formula: see text]. The measured inclusive cross section in the [Formula: see text] peak region (60-120[Formula: see text]), obtained from the combination of the dielectron and dimuon channels, is [Formula: see text], where the statistical uncertainty is negligible. The differential cross section [Formula: see text] in the dilepton mass range 15-2000[Formula: see text] is measured and corrected to the full phase space. The double-differential cross section [Formula: see text] is also measured over the mass range 20 to 1500[Formula: see text] and absolute dilepton rapidity from 0 to 2.4. In addition, the ratios of the normalized differential cross sections measured at [Formula: see text] and 8[Formula: see text] are presented. These measurements are compared to the predictions of perturbative QCD at next-to-leading and next-to-next-to-leading (NNLO) orders using various sets of parton distribution functions (PDFs). The results agree with the NNLO theoretical predictions computed with fewz 3.1 using the CT10 NNLO and NNPDF2.1 NNLO PDFs. The measured double-differential cross section and ratio of normalized differential cross sections are sufficiently precise to constrain the proton PDFs.