Higgs pair production in vector-boson fusion at the LHC and beyond

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 i...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2017-07, Vol.77 (7), p.481-26, Article 481
Main Authors: Bishara, Fady, Contino, Roberto, Rojo, Juan
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Bosons
Broken symmetry
Colliders (Nuclear physics)
Collimation
Constraint modelling
Couplings
Cross-sections
Elementary Particles
Hadrons
Heavy Ions
Higgs bosons
Large Hadron Collider
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Pair production
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quarks
Regular - Theoretical Physics
Regular Article - Theoretical Physics
String Theory
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Summary: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 b b ¯ b b ¯ 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 L = 300 (3000) fb - 1 , while a 1% precision can be achieved at a 100 TeV collider.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-5037-9