Combination of electroweak and QCD corrections to single W production at the Fermilab Tevatron and the CERN LHC

被引:63
作者
Balossini, Giovanni [1 ,2 ]
Montagna, Guido [1 ,2 ]
Calame, Carlo Michel Carloni [3 ,4 ]
Moretti, Mauro [5 ,6 ]
Nicrosini, Oreste [2 ]
Piccinini, Fulvio [2 ]
Treccani, Michele [7 ]
Vicini, Alessandro [8 ,9 ]
机构
[1] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy
[2] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy
[3] Ist Nazl Fis Nucl, Frascati, Italy
[4] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[5] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy
[6] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy
[7] Univ Granada, Dept Fis Teor & Cosmos, CAPFE, E-18071 Granada, Spain
[8] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[9] INFN, Sez Milano, I-20133 Milan, Italy
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2010年 / 01期
关键词
Hadronic Colliders; QCD; Standard Model; DRELL-YAN PROCESS; PARTON DISTRIBUTIONS; RADIATIVE-CORRECTIONS; MONTE-CARLO; QED CORRECTIONS; BOSON; UNCERTAINTIES; PREDICTIONS; GENERATION; SHOWERS;
D O I
10.1007/JHEP01(2010)013
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
Precision studies of the production of a high-transverse momentum lepton in association with missing energy at hadron colliders require that electroweak and QCD higher-order contributions are simultaneously taken into account in theoretical predictions and data analysis. Here we present a detailed phenomenological study of the impact of electroweak and strong contributions, as well as of their combination, to all the observables relevant for the various facets of the pp(-) -> lepton + X physics programme at hadron colliders, including luminosity monitoring and Parton Distribution Functions constraint, W precision physics and search for new physics signals. We provide a theoretical recipe to carefully combine electroweak and strong corrections, that are mandatory in view of the challenging experimental accuracy already reached at the Fermilab Tevatron and aimed at the CERN LHC, and discuss the uncertainty inherent the combination. We conclude that the theoretical accuracy of our calculation can be conservatively estimated to be about 2% for standard event selections at the Tevatron and the LHC, and about 5% in the very high W transverse mass/lepton transverse momentum tails. We also provide arguments for a more aggressive error estimate (about 1% and 3%, respectively) and conclude that in order to attain a one per cent accuracy: 1) exact mixed O(alpha alpha(s)) corrections should be computed in addition to the already available NNLO QCD contributions and two-loop electroweak Sudakov logarithms; 2) QCD and electroweak corrections should be coherently included into a single event generator.
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页数:49
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