Extrapolating W -associated jet-production ratios at the LHC

Electroweak vector-boson production, accompanied by multiple jets, is an important background to searches for physics beyond the standard model. A precise and quantitative understanding of this process is helpful in constraining deviations from known physics. We study four key ratios in W+n-jet prod...

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Veröffentlicht in:Physical review. D 2015-07, Vol.92 (1), Article 014008
Hauptverfasser: Bern, Z., Dixon, L. J., Febres Cordero, F., Höche, S., Ita, H., Kosower, D. A., Maître, D.
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Sprache:eng
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Zusammenfassung:Electroweak vector-boson production, accompanied by multiple jets, is an important background to searches for physics beyond the standard model. A precise and quantitative understanding of this process is helpful in constraining deviations from known physics. We study four key ratios in W+n-jet production at the LHC. We compute the ratio of cross sections for W+n- to W+(n-1)-jet production as a function of the minimum jet transverse momentum. We also study the ratio differentially, as a function of the W-boson transverse momentum; as a function of the scalar sum of the jet transverse energy, HTjets; and as a function of certain jet transverse momenta. We show how to use such ratios to extrapolate differential cross sections to W+6-jet production at next-to-leading order, and we cross-check the method against a direct calculation at leading order. We predict the differential distribution in HTjets for W+6 jets at next-to-leading order using such an extrapolation. We use the BLACK HAT software library together with SHERPA to perform the computations.
ISSN:1550-7998
2470-0010
1550-2368
2470-0029
DOI:10.1103/PhysRevD.92.014008