Browsing Research Articles by Title

Browsing Research Articles by Title

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  • de Mello Koch, R.; Tahiridimbisoa, N.H.; Mathwin, C. (Springer Verlag, 2016-03)
    We study spin chains with boundaries that are dual to open strings suspended between systems of giant gravitons and dual giant gravitons. Motivated by a geometrical interpretation of the central charges of su(2|2), we ...
  • Bhattacharyya, Arpan; Haque, S. Shajidul; Jejjala, Vishnu; Nampuri, Suresh; Véliz-Osorio, Álvaro (Springer, 2014-11-24)
    Using the attractor mechanism for extremal solutions in N = 2 gauged supergravity, we construct a c-function that interpolates between the central charges of theories at ultraviolet and infrared conformal fixed points ...
  • Chen, A.; Colafrancesco, S.; Jingo, M.; Collaboration, H.E.S.S.; 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.; Komin, Nu. (EDP Sciences, 2017-02)
    Studying the temporal variability of BL Lac objects at the highest energies provides unique insights into the extreme physical processes occurring in relativistic jets and in the vicinity of super-massive black holes. To ...
  • Prokhorov, D.A.; Churazov, E.M. (Oxford University Press (OUP), 2017-09)
    While rich clusters are powerful sources of X-rays, γ -ray emission from these large cosmic structures has not been detected yet. X-ray radiative energy losses in the central regions of relaxed galaxy clusters are so strong ...
  • Marchegiani, P.; Colafrancesco, S. (Oxford University Press (OUP), 2017-08)
    A recent stacking analysis of Planck HFI data of galaxy clusters led to the derivation of the cluster temperatures using the relativistic corrections to the Sunyaev-Zel'dovich effect (SZE). However, the temperatures of ...
  • Kudoda, A.M.; Faltenbacher, A. (Oxford University Press (OUP), 2017-06)
    This study investigates the impact of the fluctuations in the extragalactic background light (EBL) on the attenuation of the hard gamma-ray spectra of distant blazars. EBL fluctuations occur on the scales up to 100 Mpc and ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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. ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • 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 ...

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