Particle Physics: From the Early Universe to the Large Hadron Collider
Lead Research Organisation:
University of Manchester
Department Name: Physics and Astronomy
Abstract
Particle physics is all about understanding the elementary building blocks of nature and their interactions. Over the years, physicists have developed the Standard Model of particle physics, which is extremely successful in describing a very wide range of natural phenomena from things as basic as how light works and why atoms form through to the complicated workings inside stars and the synthesis of nuclei in the first few minutes after the Big Bang. However, we know that the Standard Model is not the whole story for it leaves many questions unanswered. Our proposal focuses on these unanswered questions and the way that scientists hope to address them in the coming years using experiments like the Large Hadron Collider (LHC) or observations like those that will be made using the Planck satellite. At the LHC, physicists are searching for the Higgs boson, which represents our current best guess as to what is responsible for the origin of mass. They are also searching for a whole host of new particles such as those predicted by supersymmetry. If supersymmetry is discovered then it offers the hope also to explain the origin of the Dark Matter that makes up a large fraction of the material that is known to exist in the Universe. The scientists in our consortium will explore the theory of supersymmetry and dark matter. We will use data from experiments like the LHC to identify which of the many possible variants of supersymmetry are allowed by the data and to suggest new ways to explore those models in experiments. Any 'new physics' produced at the LHC will be produced as a result of smashing two protons into each other and that means they will be produced in a complicated environment, probably in association with 'jets' of other particles. Members of our consortium will explore how we can make use of these jets to learn more about the associated new physics: the better we understand the environment in which new physics occurs, the more we are able to learn about the new physics itself. This is a complicated business that often necessitates computer simulations of particle collisions. Our members are experts in these simulations and have plans on how the make them more accurate, which is necessary if we are to make the most of the exciting data from the LHC. The Standard Model of particle physics is also deficient when it comes to explaining the early history of the Universe, when it was hot and dense. The evidence is now very strong that the history began with an era of accelerating expansion, called inflation. We are experts on inflation and its consequences. Inflation makes the Universe featureless, except for quantum fluctuations which somehow grow, causing the density of matter and energy in the Universe to vary with position. These initially small variations grow to become observable effects. One effect is the formation of the billions of galaxies that populate the night sky. Another effect is to leave a tiny imprint on the cosmic microwave background radiation (CMB), a faint hum of microwave radiation in which the earth is bathed. The CMB will be studied in exquisite detail by the Planck satellite, which was launched in 2009. We hope to be at the forefront of interpreting the Planck data in the hope of pinning down which of the various theories of the early universe are ruled out and which remain viable. The deficiencies of the Standard Model extend still further for it does not explain the amount nor even the existence of ordinary matter. Our scientists will use this to constrain possible physics beyond the Standard Model and to do that they need to master the dynamics of the Universe shortly after the end of inflation. Last but not least, we hope to understand better the mysterious 'Dark Energy' that drives the current and future acceleration of the Universe: perhaps it is because Einstein's theory of gravity is not quite right and that is something we will explore.
Organisations
Publications
Darmé L
(2018)
Flavor anomalies and dark matter in SUSY with an extra U(1)
in Journal of High Energy Physics
Kowalska K
(2015)
GUT-inspired SUSY and the muon g - 2 anomaly: prospects for LHC 14 TeV
in Journal of High Energy Physics
Seymour M
(2013)
Constraining MPI models using s eff and recent Tevatron and LHC Underlying Event data
in Journal of High Energy Physics
Forshaw J
(2012)
On the breaking of collinear factorization in QCD
in Journal of High Energy Physics
Biswas T
(2014)
Atick-Witten Hagedorn conjecture, near scale-invariant matter and blue-tilted gravity power spectrum
in Journal of High Energy Physics
Dasgupta M
(2015)
Small-radius jets to all orders in QCD
in Journal of High Energy Physics
Roszkowski L
(2015)
Axino dark matter with low reheating temperature
in Journal of High Energy Physics
Dasgupta M
(2016)
Improved jet substructure methods: Y-splitter and variants with grooming
in Journal of High Energy Physics
Kimura T
(2016)
Nonlocal N = 1 $$ \mathcal{N}=1 $$ supersymmetry
in Journal of High Energy Physics
Kowalska K
(2013)
Two ultimate tests of constrained supersymmetry
in Journal of High Energy Physics
Dev P
(2013)
Erratum: 125 GeV Higgs boson and the type-II seesaw model
in Journal of High Energy Physics
Dev P
(2013)
125 GeV Higgs boson and the type-II seesaw model
in Journal of High Energy Physics
Roszkowski L
(2014)
What next for the CMSSM and the NUHM: improved prospects for superpartner and dark matter detection
in Journal of High Energy Physics
Balázs C
(2014)
Baryogenesis, dark matter and inflation in the next-to-minimal supersymmetric standard model
in Journal of High Energy Physics
Teimouri A
(2016)
Generalised boundary terms for higher derivative theories of gravity
in Journal of High Energy Physics
Dasgupta M
(2016)
Jet shapes for boosted jet two-prong decays from first-principles
in Journal of High Energy Physics
Dasgupta M
(2015)
On jet substructure methods for signal jets
in Journal of High Energy Physics
Dasgupta M
(2016)
Inclusive jet spectrum for small-radius jets
in Journal of High Energy Physics
Roszkowski L
(2015)
Prospects for dark matter searches in the pMSSM
in Journal of High Energy Physics
Bähr M
(2013)
Extracting s eff from the CDF ? + 3jets measurement
in Journal of High Energy Physics
Dimopoulos K
(2012)
Parity Violating Statistical Anisotropy
in Journal of High Energy Physics
Bezrukov F
(2013)
Light inflaton after LHC8 and WMAP9 results
in Journal of High Energy Physics
Hou T
(2018)
CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis
in Journal of High Energy Physics
Baxter J
(2016)
On the stability of soliton and hairy black hole solutions of ( N ) Einstein-Yang-Mills theory with a negative cosmological constant
in Journal of Mathematical Physics
Bomark N
(2016)
Detection prospects of light NMSSM Higgs pseudoscalar via cascades of heavier scalars from vector boson fusion and Higgs-strahlung
in Journal of Physics G: Nuclear and Particle Physics
Description | Progress on many fronts towards a better understanding of the universe, by developing theoretical models constrained by data from the LHC and cosmology experiments such as Planck. |
Exploitation Route | By continued research. |
Sectors | Education |
Description | Researchers supported by this award have been very active in outreach activities for the general public, schools and scientists from other fields. |
First Year Of Impact | 2014 |
Sector | Education |
Impact Types | Cultural,Societal |