Precision Higgs Measurements: Constraints from New Oblique Corrections
arXiv:1307.0496 · doi:10.1007/JHEP09(2013)151
Abstract
New particles entering into self-energies of the Higgs boson would necessarily modify loop-induced couplings of the Higgs, if the new particle carries standard model gauge quantum numbers. For a 1 TeV new particle, deviations in these "Higgs oblique corrections" are generically of the order of v^2/(1 TeV)^2 ~ 5%. We study constraints on masses and couplings of new scalars and fermions that can be derived from 5-10% deviations in the Higgs digluon and diphoton partial widths. To reduce theoretical uncertainties, we present next-to-leading order QCD corrections to the Higgs-to-digluon coupling for scalars and fermions in arbitrary representations of SU(3) color group, by applying the low-energy Higgs theorems at two-loop order. As a by-product we provide a new value for NLO QCD corrections to the top squark contributions to digluon decays that differs from existing literature. We also emphasize that precise measurements of Higgs couplings to W boson and top quark are prerequisite to precise determinations of Higgs oblique corrections from new particles.
27 pages, 6 figures, References added, Fig.4 slightly corrected, conclusions unchanged. Published in JHEP
References in corpus (12)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- The Higgs sector of the complex MSSM at two-loop order: QCD contributions
- Origin of the Large Perturbative Corrections to Higgs Production at Hadron Colliders
- Pseudo-Goldstone Higgs Production via Gluon Fusion
- Higgs Boson Production via Gluon Fusion: Squark Loops at NLO QCD
- Can the 125 GeV Higgs be the Little Higgs?
- Little Higgs theory confronted with the LHC Higgs data
- Gauge-Higgs Unification at LHC
- T-parity, its problems and their solution
- H to Z gamma in Gauge-Higgs Unification
- Theoretical Summary Lecture for Higgs Hunting 2012
Cited by in corpus (22)
- Physics of leptoquarks in precision experiments and at particle colliders
- Electroweak Couplings of the Higgs Boson at a Multi-TeV Muon Collider
- Higgs Boson Production and Decay at Hadron Colliders
- Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications
- Global constraints on anomalous triple gauge couplings in effective field theory approach
- What's in the Loop? The Anatomy of Double Higgs Production
- Effective field theory approach to LHC Higgs data
- Beyond Geolocating: Constraining Higher Dimensional Operators in with Off-Shell Production and More
- Closing the stop gap
- Usefulness of effective field theory for boosted Higgs production
- The -Parameter: An Oblique Higgs View
- A New Look at Higgs Constraints on Stops
- Leptoquarks in Oblique Corrections and Higgs Signal Strength: Status and Prospects
- Putting a Stop to di-Higgs Modifications
- Hilbert Series and Plethystics: Paving the path towards 2HDM- and MLRSM-EFT
- Effective Higgs Lagrangian and Constraints on Higgs Couplings
- Light Stop Mass Limits from Higgs Rate Measurements in the MSSM: Is MSSM Electroweak Baryogenesis Still Alive After All?
- Yukawa Corrections to Higgs Production in Top Partner Models
- Constraints on scalar and vector leptoquarks from the LHC Higgs data
- Anomalous neutral gauge boson interactions and simplified models
- and with Anomalous Couplings at Next-to-Leading Order in QCD
- Future Prospects for Stau in Higgs Coupling to Di-photon