Articulo
Measurement of the double-differential high-mass Drell-Yan cross section in pp collisions at √s = 8 TeV with the ATLAS detector
Registro en:
issn:1126-6708
Autor
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Institución
Resumen
This paper presents a measurement of the double-differential cross section for the Drell-Yan Z/γ* → ℓ<sup>+</sup>ℓ<sup>-</sup> and photon-induced γγ → ℓ<sup>+</sup>ℓ<sup>-</sup> processes where ℓ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, m<sub>ℓℓ</sub>, between 116 GeV and 1500 GeV using a sample of 20.3 fb<sup>-1</sup> 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<sub>ℓℓ</sub> 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<sub>ℓℓ</sub>. 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. La lista completa de autores que integran el documento puede consultarse en el archivo. Facultad de Ciencias Exactas Instituto de Física La Plata