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Advances in High Energy Physics and Cosmology

21–23 Mar 2018
University of Southampton
Europe/London timezone

Contribution List

28 out of 28 displayed
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  1. 9. Holographic Cosmology
    Kostas Skenderis (University of Amsterdam)
    22/03/2018, 09:30
  2. 18. Lattice Holographic Cosmology
    Matthew Mostert (University of Southampton)
    22/03/2018, 10:20
    Talk

    Placeholder

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  3. 21. Lattice QCD
    James Richings (University of Southampton)
    22/03/2018, 11:10
    Talk

    Place holder

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  4. 14. Searches for NMSSM Signatures with Low Missing Transverse Energy at the LHC
    Alexander Titterton (University of Bristol (GB))
    22/03/2018, 11:30
    Talk

    We examine scenarios in the Next to Minimal Supersymmetric Standard Model where pair-produced squarks and gluinos decay via two cascades, each ending in a stable neutralino LSP and a standard model Higgs with the mass gaps in the decay such that the Missing Transverse Energy is very small. Performing two-dimensional parameter scans and focusing on the hadronic h→$b\bar{b}$ decay giving a...

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  5. 24. Renormalisation group fixed points and physics at highest energies
    Mr Andrew Bond (University of Sussex)
    22/03/2018, 11:50
    Talk

    Some recent developments in the understanding of particle theories controlled by ultraviolet fixed points.

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  6. 17. Dimension-8 operators in Higgs physics
    Jack Setford (University of Sussex)
    22/03/2018, 12:10
    Talk

    I will describe the process by which one can derive the full set of dimension-8 bosonic operators involving Higgses and gauge bosons. I will then discuss the implications of these operators on current measurements and bounds on dimension-6 Wilson coefficients.

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  7. 19. Dark Matter
    Dr Stephen West (Royal Holloway, University of London)
    22/03/2018, 13:30
  8. 26. Probing the nature of Dark Matter at the ILC
    Daniel Locke (University of Southampton)
    22/03/2018, 14:20

    We analyse the potential of the proposed international linear collider to detect Dark Matter (DM) and determine its properties. In many models stability of Dark Matter particles D is ensured by conservation of a new quantum number referred to as D-parity. Our models also contain charged D-odd particles $D^{\pm}$ with the same spin as D. In this work, we study two minimal consistent models...

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  9. 4. Fast simulations of dark matter structure formation with modified gravity and massive neutrinos.
    Mr Bill Wright (Institute of Cosmology and Gravitation, University of Portsmouth)
    22/03/2018, 14:40
    Talk

    I will briefly introduce the need for fast, approximate tools for cosmological simulations of dark matter structure formation, before talking about how we have implemented both modified gravity and massive neutrinos into the fast, approximate simulation tool $\tt{COLA}$.

    I will present results produced by this extended version of $\tt{COLA}$ and explain how a potential degeneracy between the...

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  10. 11. Leptogenesis and BSM physics
    Pasquale Di Bari (University of Southampton)
    22/03/2018, 15:40
  11. 15. Dark Matter indirect detection at Neutrino Telescopes: a multi-messenger approach
    Dr Marco Chianese (University of Southampton)
    22/03/2018, 16:30
    Talk

    Tbc

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  12. 3. Predicting the Right-Handed Neutrino Masses From the Littlest Seesaw and Leptogenesis
    Mr Sam Rowley (University of Southampton)
    22/03/2018, 17:00
    Talk

    The Littlest Seesaw model based on two right-handed neutrinos with constrained Yukawa couplings provides a highly predictive description of neutrino masses and PMNS mixing parameters. If realised at high energies there will be renormalisation group corrections to the low energy predictions, which depend on the right-handed neutrino masses. We perform a $\chi^2$ analysis to determine the...

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  13. 6. Quantum diffusion during inflation and primordial black holes
    Mr Chris Pattison (ICG)
    22/03/2018, 17:20
    Talk

    I will explain how primordial black holes can form from perturbations seeded during inflation and how their abundance can be calculated in the framework of stochastic inflation. This formalism incorporates quantum backreaction of the small-wavelength fluctuations on the large distances dynamics of the Universe. If quantum corrections are small, the probability distribution of density...

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  14. 1. Using infinite derivative gravity to resolve singularities
    James Edholm
    22/03/2018, 17:40
    Talk

    Infinite derivative gravity adds terms which make gravity weaker at short distances, allowing us the possiblity of avoiding the singularities which plague General Relativity. I will discuss both linearised perturbations to the flat metric and bouncing FRW cosmologies.

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  15. 22. Conformal window of asymptotic safety
    Gustavo Medina Vazquez (University of Sussex)
    22/03/2018, 18:00
    Talk

    The conformal window of a general class of gauge theories featuring a weakly coupled UV fixed point is investigated at next-to-next-to-leading order and found to lie completely within the domain of perturbation theory. Constraints are derived in various approximations, finding that vacuum instability yields the tightest constraint at NNLO.

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  16. 30. Interacting vacuum dark energy
    Ms Natalie Hogg
    22/03/2018, 18:20

    The standard model of cosmology, LCDM, suffers from both theoretical and observational problems that motivate alternative theories of dark energy. One such class of theories are interacting dark energy models. In my talk, I will give an overview of the problems with LCDM and discuss the interacting vacuum scenario, in which the time-varying vacuum energy is allowed to interact with dark...

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  17. 12. Testing gravity with black holes and gravitational waves
    Dr Helvi Witek
    23/03/2018, 09:00
  18. 23. Conformally Coupled General Relativity
    Mr Boris Latosh (University of Sussex)
    23/03/2018, 09:50
    Talk

    Gravity model developed in the series of papers Grav.Cosmol. 15 (2009) 199-212; Phys.Lett. B691 (2010) 230-233; Gen.Rel.Grav. 44 (2012) 2745-2783 is revisited. Model is based on Ogievetsky theorem that specifies structure of general coordinate transformation group. The theorem is implemented in the context of Noether theorem with the use of nonlinear representation technique. Quantization is...

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  19. 28. Rapid response gravitational wave follow-up with the PIRATE robotic telescope
    Dean Roberts
    23/03/2018, 10:10

    In the last two years since LIGO discovered the first gravitational waves, the field of gravitational wave astronomy has advanced rapidly. In the last observing run (O2) LIGO detected two more binary black hole mergers and with the help of Virgo, was also able to detect gravitational waves from a binary neutron star merger. This event was a landmark discovery because in addition to...

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  20. 8. Semi-empirical techniques to unveil the properties of both galaxies and their host dark matter halos
    Dr Francesco Shankar
    23/03/2018, 11:15
    Talk
  21. 29. Neutrinoless Double Beta Decay and the Baryon Asymmetry of the Universe
    Dr Frank Deppisch (University College London)
    23/03/2018, 13:00

    I will discuss the impact of the observation of neutrinoless double beta decay on the washout of lepton number in the early universe. Neutrinoless double beta decay can be triggered by a large number of mechanisms that can be encoded in terms of SM effective operators which violate lepton number. Such operators, or the underlying UV processes would also be responsible for the washout of an...

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  22. 13. Gravitational Waves and Compact Binaries
    Christopher Berry
    23/03/2018, 14:00
  23. 20. Graviataional Waves from Phase Transitions in the Early Universe
    Mark Hindmarsh (University of Sussex)
    23/03/2018, 15:10
  24. 5. A novel way to determine the scale of inflation
    Robert Hardwick
    Talk

    Efforts to constrain the inflationary energy scale using the tensor-to-scalar ratio are limited by the minimum upper bound from observations. This still leaves a window of nearly 8 orders of magnitude in energy before the LHC can potentially offer complementary constraints from below. In the Feebly Interacting Massive Particle (FIMP) model of Dark Matter (DM), we find that one may express the...

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  25. 16. Invited Speaker
  26. 10. Invited speaker 2
  27. 25. SO(10)xS4 Grand Unified Theory of Flavour and Leptogenesis

    (Elena Perdomo)

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  28. 2. The linear bias of radio loud active galactic nuclei via cosmic microwave background lensing
    Dr Carolyn Devereux (University of Herfordshire)
    Talk

    Large areas of galaxy clusters, voids and filaments make up the cosmic web. An important realisation was that the distribution of galaxies does not exactly trace the total matter density field (dark matter plus baryonic matter) of the cosmic web. The linear bias (overdensity of baryonic matter to all matter) of galaxy populations informs us about their environmental properties, which can be a...

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