Theory uncertainties for Higgs mass and other searches using jet bins
Name
Stewart-2012-Theory uncertainties for Higgs mass and other searches using jet bins.pdf
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716.35 KB
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Author(s)
Stewart, Iain
Tackmann, Frank
Date Issued
February 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Stewart, Iain, and Frank Tackmann. “Theory Uncertainties for Higgs Mass and Other Searches Using Jet Bins.” Physical Review D 85.3 (2012): 034011-1-034011-13. © 2012 American Physical Society.
Version
Final published version
Abstract
Bounds on the Higgs mass from the Tevatron and LHC are determined using exclusive jet bins to maximize sensitivity. Scale variation in exclusive fixed-order predictions underestimates the perturbative uncertainty for these cross sections, due to cancellations between the perturbative corrections leading to large K factors and those that induce logarithmic sensitivity to the jet-bin boundary. To account for this, we propose that scale variation in the fixed-order calculations should be used to determine theory uncertainties for inclusive jet cross sections, whose differences yield exclusive jet cross sections. This yields a theory correlation matrix for the jet bins such that the additional uncertainty from large logarithms due to the jet boundary cancels when neighboring bins are added. This procedure is tested for H+0,1 jets, WW+0 jets, and W+0,1,2 jets, and found to be generally applicable. For a case where the higher-order resummation of the jet boundary corrections is known, we show that this procedure yields fixed-order uncertainties which are theoretically consistent with those obtained in the resummed calculation
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.85.034011
