Exploring the Limits of the Standard Model and Beyond
Lead Research Organisation:
University of Southampton
Department Name: Sch of Physics and Astronomy
Abstract
Experiments at the Large Hadron Collider (LHC) have recently began taking data and over the next decade will have a very major impact on particle physics. They will confirm or disprove the Higgs field as the underlying mechanism for the generation of mass and it is to be expected that there will be signatures of physics 'Beyond the Standard Model'. The Standard Model of Particle Physics has been remarkably (and frustratingly) successful and yet leaves in its wake the following well known puzzles: the origin of mass, the quest for unification and the problem of flavour. This proposal is to support the research of the theoretical particle physicists at the University of Southampton which addresses these questions. The main goal is to provide the theoretical ideas and techniques which will help our experimental colleagues discover the Higgs Boson and signatures of new physics, to influence the analyses which will be performed and to contribute to the theoretical interpretation of the experimental data. There are many aspects to this work and we now briefly review some of these and explain the Southampton group's role. The experimental discovery signatures of the Higgs Boson, and indeed of the particles present in theories beyond the standard model, depend on the masses of these particles and on the new theories. In Southampton we have expertise and experience in devising strategies for these searches and also in developing theories of new physics. We have close links to the UK experimenters working at the LHC and will work closely with them in their analyses. Indeed, together with the Rutherford-Appleton Laboratory (RAL), we have founded the NExT (New Experimental Theoretical Interactions) Institute with the close collaboration of theorists and experimenters as its main goal, and NExT has recently been expanded to include Sussex and Royal Holloway. The results from the analyses in turn will constrain the new theories, for example by confirming or disproving the idea of supersymmetry, and guide us in unravelling the next level of fundamental physics. These are remarkably exciting times! Of course, in order to be confident that we have observed a signal of new physics we have to be sure that what we are seeing is not simply a subtle effect of the standard model. Frequently, as a result of our limited ability to quantify the effects of the strong nuclear force, this is difficult to do. In Southampton we have outstanding expertise in quantum chromodynamics, QCD, the theory of these strong interactions. This includes a major research programme using state-of-the-art supercomputers to compute these effects for a wide variety of physical processes. A major component of our future programme is to expand and develop the activity of numerical simulations on the IBM BlueGene/Q supercomputers which will be commissioned in mid-2011. It is likely that some (or perhaps all) new particles will be too heavy to be observed directly at the LHC. In that case their presence will have to be deduced indirectly, by observing deviations from Standard Model predictions for 'rare' processes. The programme of numerical simulations will be central in establishing these deviations as will the analytical techniques which we are using. We also have a wider interest in the behaviour of strongly interacting systems which could play a role in physics beyond the standard model and in cosmology. For example we will study composite higgs models and variants of QCD with very different behaviour. Such systems are also deeply connected to theories of gravitation through a 'duality' which provides an alternative description of strong coupling in terms of general relativity, string theory and black hole physics - these studies will shed light on physics from phase transitions in QCD to quantum gravity.
Organisations
Publications
Sachrajda Christopher
(2011)
Phenomenology from the Lattice
in arXiv e-prints
Preston A
(2014)
Cosmological back-reaction in modified gravity and its implications for dark energy
in Journal of Cosmology and Astroparticle Physics
Bari P
(2014)
Radiative inflation and dark energy RIDEs again after BICEP2
in Journal of Cosmology and Astroparticle Physics
King S
(2012)
Warm Dark Matter from keVins
in Journal of Cosmology and Astroparticle Physics
Bari P
(2015)
Successful N 2 leptogenesis with flavour coupling effects in realistic unified models
in Journal of Cosmology and Astroparticle Physics
Di Bari P
(2016)
Supersymmetric SO(10)-inspired leptogenesis and a new N 2 -dominated scenario
in Journal of Cosmology and Astroparticle Physics
Belyaev A
(2013)
Discovering Minimal Universal Extra Dimensions (MUED) at the LHC
in Journal of High Energy Physics
Cooper I
(2012)
A4 × SU(5) SUSY GUT of flavour with trimaximal neutrino mixing
in Journal of High Energy Physics
Callaghan J
(2013)
E6 models from F-theory
in Journal of High Energy Physics
Ding G
(2013)
Spontaneous CP violation from vacuum alignment in S 4 models of leptons
in Journal of High Energy Physics
King S
(2014)
Effective theory of a doubly charged singlet scalar: complementarity of neutrino physics and the LHC
in Journal of High Energy Physics
Callaghan J
(2013)
Gauge coupling unification in E 6 F-theory GUTs with matter and bulk exotics from flux breaking
in Journal of High Energy Physics
King S
(2016)
Littlest Seesaw
in Journal of High Energy Physics
Belyaev A
(2013)
What does the CMS measurement of W-polarization tell us about the underlying theory of the coupling of W-bosons to matter?
in Journal of High Energy Physics
King S
(2013)
The power of neutrino mass sum rules for neutrinoless double beta decay experiments
in Journal of High Energy Physics
Hall J
(2013)
NMSSM+
in Journal of High Energy Physics
Aggleton R
(2017)
Review of LHC experimental results on low mass bosons in multi Higgs models
in Journal of High Energy Physics
King S
(2014)
A model of quark and lepton mixing
in Journal of High Energy Physics
Keus V
(2015)
Observable heavy Higgs dark matter
in Journal of High Energy Physics
Ding G
(2013)
Generalised CP and A4 family symmetry
in Journal of High Energy Physics
King S
(2016)
750 GeV diphoton resonance from singlets in an exceptional supersymmetric standard model
in Journal of High Energy Physics
Belyaev A
(2013)
Multiple Higgs and vector boson production beyond the Standard Model
in Journal of High Energy Physics
Keus V
(2014)
Three-Higgs-doublet models: symmetries, potentials and Higgs boson masses
in Journal of High Energy Physics
Dimou M
(2016)
Approaching Minimal Flavour Violation from an SU(5) × S 4 × U(1) SUSY GUT
in Journal of High Energy Physics
Dietz J
(2013)
Redundant operators in the exact renormalisation group and in the f (R) approximation to asymptotic safety
in Journal of High Energy Physics
Chen P
(2016)
Leptogenesis and residual CP symmetry
in Journal of High Energy Physics
Ding G
(2014)
Generalised CP and ?(6n 2) family symmetry in semi-direct models of leptons
in Journal of High Energy Physics
King S
(2015)
Models of neutrino mass, mixing and CP violation
in Journal of Physics G: Nuclear and Particle Physics
King S
(2014)
Neutrino mass and mixing: from theory to experiment
in New Journal of Physics
Cooper I
(2013)
A golden A 5 model of leptons with a minimal NLO correction
in Nuclear Physics B
King S
(2013)
Natural NMSSM Higgs bosons
in Nuclear Physics B
King S
(2013)
A Grand Flavour Model
in Nuclear Physics B
King S
(2012)
NMSSM Higgs benchmarks near 125 GeV
in Nuclear Physics B
King S
(2015)
Exploring the CP-violating NMSSM: EDM constraints and phenomenology
in Nuclear Physics B
King S
(2016)
Neutrino mass and mixing in the seesaw playground
in Nuclear Physics B
Christ N
(2013)
Long distance contribution to the K L - K S mass difference
in Physical Review D
Antusch S
(2014)
GUT predictions for quark-lepton Yukawa coupling ratios with messenger masses from non-singlets
in Physical Review D
Flynn J
(2016)
B * B p coupling using relativistic heavy quarks
in Physical Review D
Binjonaid M
(2014)
Naturalness of scale-invariant NMSSMs with and without extra matter
in Physical Review D
Blum T
(2016)
Domain wall QCD with physical quark masses
in Physical Review D
Belyaev A
(2013)
Discovering E 6 supersymmetric models in gluino cascade decays at the LHC
in Physical Review D
Carrasco N
(2015)
QED corrections to hadronic processes in lattice QCD
in Physical Review D
King S
(2014)
Discovery prospects for NMSSM Higgs bosons at the high-energy Large Hadron Collider
in Physical Review D
Antusch S
(2013)
Spontaneous C P violation in A 4 × S U ( 5 ) with constrained sequential dominance 2
in Physical Review D
Bridle I
(2016)
Fate of nonpolynomial interactions in scalar field theory
in Physical Review D
Blum T
(2012)
Lattice determination of the K ? ( p p ) I = 2 decay amplitude A 2
in Physical Review D
Belyaev A
(2013)
Little Z ' models
in Physical Review D
Athron P
(2013)
Fine tuning in the constrained exceptional supersymmetric standard model
in Physical Review D
Keus V
(2014)
Phenomenology of the inert ( 2 + 1 ) and ( 4 + 2 ) Higgs doublet models
in Physical Review D
Crispim Romão M
(2016)
MSSM from F-theory SU(5) with Klein monodromy
in Physical Review D
Description | Grant ended 2011 -no further findings |
Exploitation Route | As above |
Sectors | Other |
Description | No further progress, grant ended in 2011 |
First Year Of Impact | 2009 |
Sector | Education |
Impact Types | Societal |