Journal Article

Measurement of the double-differential high-mass Drell-Yan cross section in pp collisions at √s = 8 TeV with the ATLAS detector

Alessandro Gabrielli, Michel Vetterli, Philippe Schune, Olga Bessidskaia Bylund, Chikara Fukunaga, Stephan Hageböck, Andreas Wildauer, Ayda Beddall, Umberto De Sanctis, Brian Lee Clark, Alexei Soloshenko, Leonid Serkin, Alessandra Ciocio, Paul Thompson, Konstantin Vorobev, David Milstead, Markus Nordberg, G. Eigen, Khilesh Pradip Mistry, Harry van der Graaf, Evangelos Leonidas Gkougkousis, Andrey Minaenko, Hidetoshi Otono, Guillaume Unal, Steven Farrell, Juraj Smiesko, Thomas James Neep, Bengt Lund-Jensen, Alberto Stabile, Jian Cong Zeng, Benjamin Henry Hooberman, A. Kapliy, Andrew Pilkington, Moritz Kretz, Sebastien Prince, V. Sopko, Till Eifert, John Keller, Michel Lefebvre, Göran Jarlskog, Jörgen Sjölin, Francesco Nuti, Nikola Lazar Whallon, Amanda Cooper-Sarkar, R. Cantrill, James Bensinger, D. della Volpe, Reda Tafirout, Nan Lu, Daniel Tovey, Alexander Khanov, Akira Yamamoto, Ingrid-Maria Gregor, Paolo Morettini, Mirta Dumancic, Elisa Piccaro, Helio Takai, Francisco Anuar Arduh, J. Jimenez Pena, Marino Romano, Fabian-Phillipp Tepel, Gorm Aske Gram Krohn Galster, Reyhaneh Rezvani, Luca Colasurdo, Mohamed El

2016

Overview

A bstract This paper presents a measurement of the double-differential cross section for the Drell-Yan Z/γ ∗ → ℓ + ℓ − and photon-induced γγ → ℓ + ℓ − processes where ℓ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, m ℓℓ , between 116 GeV and 1500 GeV using a sample of 20 . 3 fb −1 of pp collisions data at centre-of-mass energy of s = 8 TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of m ℓℓ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1% is achieved at low m ℓℓ . A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated.

• Publisher: Springer,Springer Berlin Heidelberg
• Subject: 8000 GeV-cms / CERN LHC Coll / Classical and Quantum Gravitation / differential cross section: measured / dilepton: rapidity / Drell-Yan process / electron: pair production / electroweak interaction: effect / Elementary Particles / exchange: two-photon / experimental results / Fysik / Hadron-Hadron scattering (experiments) / Hadron-Hadron scattering (experiments); Nuclear and High Energy Physics / higher-order: 1 / higher-order: 2 / info:eu-repo/classification/ddc/530 / mass dependence / mass spectrum: (lepton+ lepton-) / muon: pair production / Natural Sciences / Naturvetenskap / Nuclear and High Energy Physics / p p: colliding beams / p p: scattering / parton: distribution function / Physical Sciences / Physics / Physics and Astronomy / quantum chromodynamics: perturbation theory / Quantum Field Theories / Quantum Field Theory / Quantum Physics / rapidity dependence / Regular Article - Experimental Physics / Relativity Theory / Settore FIS/01 - FISICA SPERIMENTALE / String Theory / Subatomic Physics / Subatomär fysik / Z0: leptonic decay