Skip to main content

Research Repository

Advanced Search

Combining LEP and LHC to bound the Higgs Width

Englert, Christoph; McCullough, Matthew; Spannowsky, Michael

Combining LEP and LHC to bound the Higgs Width Thumbnail


Christoph Englert

Matthew McCullough


The correlation of on- and off-shell Higgs boson production at the LHC in gg→h⁎→ZZgg→h⁎→ZZ has been used to bound the Higgs width. We propose an alternative complementary constraint which is only possible through the combination of LEP and LHC measurements. Precision electroweak measurements at LEP allow for the determination of indirect constraints on Higgs couplings to vector bosons by considering one-loop processes involving virtual Higgs exchange. As the indirect constraint is model dependent we will consider two specific models which modify the Higgs couplings and width, and our results will apply specifically to these models. By combining these LEP constraints with current LHC 8 TeV Higgs measurements a stronger limit on the Higgs width can be achieved than with LHC data alone. Looking to the future, a more robust constraint can be achieved by correlating LEP measurements with WBF Higgs production followed by Higgs decays to WW and ZZ. We will discuss the model dependence of this method in comparison to other proposed methods.


Englert, C., McCullough, M., & Spannowsky, M. (2016). Combining LEP and LHC to bound the Higgs Width. Nuclear Physics B, 902, 440-457.

Journal Article Type Article
Acceptance Date Nov 17, 2015
Online Publication Date Nov 27, 2015
Publication Date Jan 1, 2016
Deposit Date Nov 10, 2016
Publicly Available Date Jan 27, 2017
Journal Nuclear Physics B
Print ISSN 0550-3213
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 902
Pages 440-457


Published Journal Article (461 Kb)

Publisher Licence URL

Copyright Statement
© 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license<br /> ( Funded by SCOAP3.

You might also like

Downloadable Citations