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Extrapolating W-associated jet-production ratios at the LHC.

Bern, B. and Dixon, L. J. and Febres Cordero, F. and Höche, S. and Ita, H. and Maître, D. (2015) 'Extrapolating W-associated jet-production ratios at the LHC.', Physical review D., 92 (1). 014008.


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, HjetsT; 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 HjetsT for W+6 jets at next-to-leading order using such an extrapolation. We use the BlackHat software library together with SHERPA to perform the computations.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review D 92, 014008 © 2015 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:23 April 2015
Date deposited:12 November 2015
Date of first online publication:07 July 2015
Date first made open access:No date available

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