https://doi.org/10.1140/epjc/s10052-017-5037-9
Regular Article - Theoretical Physics
Higgs pair production in vector-boson fusion at the LHC and beyond
1
Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford, UK
2
Scuola Normale Superiore, Pisa and INFN Pisa, Pisa, Italy
3
Institut de Théorie des Phénomenes Physiques, EPFL, Lausanne, Switzerland
4
Theoretical Physics Department, CERN, Geneva, Switzerland
5
Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands
6
Nikhef, Science Park 105, 1098 XG, Amsterdam, The Netherlands
* e-mail: fady.bishara@physics.ox.ac.uk
Received:
6
March
2017
Accepted:
29
June
2017
Published online:
19
July
2017
The production of pairs of Higgs bosons at hadron colliders provides unique information on the Higgs sector and on the mechanism underlying electroweak symmetry breaking (EWSB). Most studies have concentrated on the gluon-fusion production mode which has the largest cross section. However, despite its small production rate, the vector-boson fusion channel can also be relevant since even small modifications of the Higgs couplings to vector bosons induce a striking increase of the cross section as a function of the invariant mass of the Higgs boson pair. In this work we exploit this unique signature to propose a strategy to extract the hhVV quartic coupling and provide model-independent constraints on theories where EWSB is driven by new strong interactions. We take advantage of the higher signal yield of the 
final state and make extensive use of jet-substructure techniques to reconstruct signal events with a boosted topology, characteristic of large partonic energies, where each Higgs boson decays to a single collimated jet. Our results demonstrate that the hhVV coupling can be measured with 45% (20%) precision at the LHC for 
(3000) fb
, while a 1% precision can be achieved at a 100 TeV collider.
© The Author(s), 2017
