کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8188998 | 1528844 | 2013 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measurement of angular correlations in Drell-Yan lepton pairs to probe Z/γâ boson transverse momentum at s=7 TeV with the ATLAS detector
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A measurement of angular correlations in Drell-Yan lepton pairs via the Ïηâ observable is presented. This variable probes the same physics as the Z/γâ boson transverse momentum with a better experimental resolution. The Z/γââe+eâ and Z/γââμ+μâ decays produced in proton-proton collisions at a centre-of-mass energy of s=7TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fbâ1. Normalised differential cross sections as a function of Ïηâ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of Ïηâ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 720, Issues 1â3, 13 March 2013, Pages 32-51
Journal: Physics Letters B - Volume 720, Issues 1â3, 13 March 2013, Pages 32-51
نویسندگان
ATLAS Collaboration ATLAS Collaboration, G. Aad, T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A.A. Abdelalim, O. Abdinov, R. Aben, B. Abi, M. Abolins, O.S. AbouZeid, H. Abramowicz, H. Abreu, B.S. Acharya, L. Adamczyk, D.L. Adams, T.N. Addy,