Browsing Research Articles by Title

Browsing Research Articles by Title

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  • Gamma-ray blazar spectra with H.E.S.S. II mono analysis: The case of PKS2155-304 and PG1553+113 
    Chen, A.; Colafrancesco, S.; Jingo, M.; Komin, Nu.; Shafi, N.; Abdalla, H.; Abramowski, A.; Aharonian, F.; Ait Benkhali, F.; Akhperjanian, A. G.; Andersson, T.; Angüner, E. O.; Arrieta, M.; Aubert, P.; Backes, M.; Balzer, A.; Barnard, M.; Becherini, Y.; Becker Tjus, J.; Berge, D.; Bernhard, S. (EDP Sciences, 2017-04)
    Context. The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies. The lowest energy threshold is obtained using monoscopic analysis of data taken with ...
  • Generation of radical species in CVD grown pristine and N-doped solid carbon spheres using H2 and Ar as carrier gases 
    Mutuma, B.K.; Matsoso, B.J.; Ranganathan, K.; Wamwangi, D.; Coville, N.J; Keartland, J. (Royal Society of Chemistry, 2017)
    Solid carbon spheres (CSs, d ≈ 200 nm) were synthesized (yield, <40%) in a vertically oriented chemical vapor deposition (CVD) reactor using acetylene as a carbon source and Ar or H2 as the carrier gas. The CSs synthesized ...
  • Heating up branes in gauged supergravity 
    Goldstein, Kevin; Nampuri, Suresh; V´eliz-Osorio, Alvaro (Springer, 2014-08-26)
    In this note, we explore the solution space of non-extremal black objects in 4D and 5D N = 2 gauged supergravity in the presence of fluxes. We present first order rewritings of the 4D action for a classes of non-extremal ...
  • Heavy quark diffusion in strongly coupled anisotropic plasmas 
    Giataganasa, Dimitrios; Soltanpanahib, Hesam (Springer, 2014-06-09)
    We study the Langevin diffusion of a relativistic heavy quark in anisotropic strongly coupled theories in the local limit. Firstly, we use the axion space-dependent deformed anisotropic N = 4 sYM, where the geometry ...
  • Higher loop nonplanar anomalous dimensions from symmetry 
    Koch, Robert de Mello; Graham, Stuart; Messamah, Ilies (Springer, 2014-02-28)
    In this article we study the action of the one loop dilatation operator on operators with a classical dimension of order N. These operators belong to the su(2) sector and are constructed using two complex fields Y and Z. ...
  • The hot attractor mechanism: decoupling without deep throats 
    Goldstein, K.; Jejjala, V.; Nampuri, S. (Springer Verlag, 2016-04)
    Non-extremal black holes in (Formula presented.) supergravity have two horizons, the geometric mean of whose areas recovers the horizon area of the extremal black hole obtained from taking a smooth zero temperature limit. ...
  • Indefinite theta functions for counting attractor backgrounds 
    Cardoso, Gabriel Lopes; Ciraficia, Michele; Nampurib, Suresh (Springer, 2014-10-03)
    In this note, we employ indefinite theta functions to regularize canonical partition functions for single-center dyonic BPS black holes. These partition functions count dyonic degeneracies in the Hilbert space of ...
  • Inelastic magnon scattering 
    De Mello Koch, R.; Van Zyl, H.J.R. (Elsevier, 2017-05)
    We study the worldsheet S-matrix of a string attached to a D-brane in AdS5×S5. The D-brane is either a giant graviton or a dual giant graviton. In the gauge theory, the operators we consider belong to the su(2|3)sector of ...
  • Interactions as intertwiners in 4D QFT 
    de Mello Koch, R.; Ramgoolam, S. (Springer Verlag, 2016-03)
    In a recent paper we showed that the correlators of free scalar field theory in four dimensions can be constructed from a two dimensional topological field theory based on so(4, 2) equivariant maps (intertwiners). The free ...
  • Large A without the desert 
    Abdalgabar, Ammar; Cornell, Alan S.; Deandrea, Aldo; McGarrie, Moritz (Springer, 2014-07-31)
    Even if the unification and supersymmetry breaking scales are around 106 to 109 TeV, a large A t coupling may be entirely generated at low energies through RGE evolution in the 5D MSSM. Independent of the precise details ...
  • Large mass hierarchies from strongly-coupled dynamics 
    Athenodorou, A.; Bennett, E.; Bergner, G.; Elander, D.; Lin, C.-J.D.; Lucini, B.; Piai, M. (Springer Verlag, 2016-06)
    Besides the Higgs particle discovered in 2012, with mass 125 GeV, recent LHC data show tentative signals for new resonances in diboson as well as diphoton searches at high center-of-mass energies (2 TeV and 750 GeV, ...
  • Light third-generation squarks from flavour gauge messengers 
    Brummer, Felix; McGarrie, Moritz; Weiler, Andreas (Springer, 2014-04-10)
    We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)F symmetry acting on the quark superfields. If SU(3)F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive ...
  • LLM magnons 
    de Mello Koch, R.; Mathwin, C.; Van Zyl, H.J.R. (Springer Verlag, 2016-03)
    We consider excitations of LLM geometries described by coloring the LLM plane with concentric black rings. Certain closed string excitations are localized at the edges of these rings. The string theory predictions for the ...
  • Measuring CP nature of top-Higgs couplings at the future LargeHadron electron Collider 
    Coleppa, B.; Kumar, M.; Kumar, S.; Mellado, B. (Elsevier, 2017-07)
    We investigate the sensitivity of top-Higgs coupling by considering the associated vertex as CP phase (ζt) dependent through the process pe−→t¯hνe in the future Large Hadron electron Collider. In particular the decay modes ...
  • Mirror quintic vacua: hierarchies and inflation. 
    Bizet, N.C; Loaiza-Brito, O.; Zavala, I (Springer Verlag, 2016-10)
    We study the moduli space of type IIB string theory flux compactifications on the mirror of the CY quintic 3-fold in ℙ 4. We focus on the dynamics of the four dimensional moduli space, defined by the axio-dilaton τ and the ...
  • Natural supersymmetry and dynamical flavour with meta-stable vacua 
    Abela, Steven; McGarrie, Moritz (Springer, 2014-07-29)
    We show how gauged flavour breaking and N = 1 supersymmetry breaking can be dynamically aligned to produce natural models. Supersymmetry is broken in a metastable vacuum, while a weakly gauged flavour symmetry is identified ...
  • Natural supersymmetry and unification in five dimensions 
    Abdalgabar, A.; Cornell, A.S.; Deandrea, A.; McGarrie, M. (Springer Verlag, 2016-01)
    We explore unification and natural supersymmetry in a five dimensional extension of the standard model in which the extra dimension may be large, of the order of 1–10 TeV. Power law running generates a TeV scale At term ...
  • Nonlinear interglitch dynamics, the braking index of the Vela pulsar and the time to the next glitch 
    Akbal, O.; Buchner, S.; Pines, D.; Alpar, M.A. (Oxford University Press (OUP), 2017-08)
    The interglitch timing of the Vela pulsar is characterized by a constant second derivative of the rotation rate. This takes over after the post-glitch exponential relaxation and is completed at about the time of the next ...
  • Probing anomalous couplings using di-Higgs production in electron–proton collisions 
    Kumar, M.; Ruan, X.; Islam, R.; Klein, M.; Klein, U.; Mellado, B.; Cornell, A.S. (Elsevier, 2017-01)
    A proposed high energy Future Circular Hadron-Electron Collider would provide sufficient energy in a clean environment to probe di-Higgs production. Using this channel we show that the azimuthal angle correlation between ...
  • Spin(7) compactifications and 1/4-BPS vacua in heterotic supergravity. 
    Angus, S.; Matti, C.; Svanes, E.E. (Springer Verlag, 2016-03)
    We continue the investigation into non-maximally symmetric compactifications of the heterotic string. In particular, we consider compactifications where the internal space is allowed to depend on two or more external ...

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