6533b825fe1ef96bd128297a
RESEARCH PRODUCT
Higgs production in a warped extra dimension
Florian GoertzMatthias NeubertSandro CasagrandeMarcela CarenaUlrich Haischsubject
High Energy Physics - TheoryPhysicsQuarkParticle physicsNuclear and High Energy PhysicsLarge Hadron ColliderHiggs Physics010308 nuclear & particles physicsBrane Dynamics in Gauge TheoriesElectroweak interactionHigh Energy Physics::PhenomenologyYukawa potentialFOS: Physical sciencesField Theories in Higher Dimensions01 natural sciencesStandard ModelHiggs sectorHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - Theory (hep-th)0103 physical sciencesHiggs bosonSymmetry breaking010306 general physicsHiggs Physics; Field Theories in Higher Dimensions; Brane Dynamics in Gauge Theoriesdescription
Measurements of the Higgs-boson production cross section at the LHC are an important tool for studying electroweak symmetry breaking at the quantum level, since the main production mechanism gg → h is loop-suppressed in the Standard Model (SM). Higgs production in extra-dimensional extensions of the SM is sensitive to the Kaluza-Klein (KK) excitations of the quarks, which can be exchanged as virtual particles in the loop. In the context of the minimal Randall-Sundrum (RS) model with bulk fields and a brane-localized Higgs sector, we derive closed analytical expressions for the gluon-gluon fusion process, finding that the effect of the infinite tower of virtual KK states can be described in terms of a simple function of the fundamental (5D) Yukawa matrices. Given a specific RS model, this will allow one to easily constrain the parameter space, once a Higgs signal has been established. We explain that discrepancies between existing calculations of Higgs production in RS models are related to the non-commutativity of two limits: taking the number of KK states to infinity and removing the regulator on the Higgs-boson profile, which is required in an intermediate step to make the relevant overlap integrals well defined. Even though the one-loop gg → h amplitude is finite in RS scenarios with a brane-localized Higgs sector, it is important to introduce a consistent ultraviolet regulator in order to obtain the correct result.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-03-30 |