Mr
Daniel Boriero
(Instituto de Fisica Gleb Wataghin, UNICAMP, Brasil)
The distribution of matter in small scales, subject to nonlinear effects, will be much better known in the next few years through upcoming surveys. To accomplish the measurement of parameters such as the neutrino mass the theoretical preciseness must evolve accordingly. We present some improvements in theoretical prediction for the matter power spectrum taking in account the effect of massive...
Mr
Sven Krause
Strings & Mathematical Physics
Mr
Jan Weenink
(Institute for Theoretical Physics, Utrecht University)
Cosmology & Astroparticle Physics
In this work we propose a classical phase space formulation of the Starobinsky stochastic inflation, which may be suitable for a quantitative study of decoherence of cosmological perturbations in a self-interacting inflationary theory. The precise knowledge of how much cosmological perturbations have decohered is essential to the understanding of acoustic oscillations of CMB photons.
In our...
Maryam Tavakoli
(SISSA; INFN, Sezione di Trieste)
The measurements with unprecedented accuracy by Fermi of the diffuse gamma ray emission in the Galaxy at energies between 100 MeV and 100 GeV are a very powerful tool to probe and constrain the properties of sources and propagation of cosmic rays (CRs) in the Galaxy, as well as interstellar medium (ISM). In particular, high latitude data (|b|>10) depend mainly on properties of the local...
Dr
Dominika Konikowska
(University of Wuerzburg)
In the ongoing search for a unified description of gravity and the gauge interactions of the Standard Model, string theories are usually regarded as the most promising proposal. At the leading order the low-energy effective action in string theories, restricted to gravity and the dilaton, yields precisely the standard Einstein gravity coupled to the dilaton field. Regarding that the very...
Dr
Thomas Flacke
(Universitaet Wuerzburg, Germany)
Models with Universal Extra Dimensions provide one of the simplest extra dimensional extensions of the Standard Model which incorporates a dark matter candidate and can provide a rich LHC phenomenology which strongly resembles SUSY signals. The minimal UED Kaluza Klein Spectrum can be modified in two ways: by operators which are localized at the orbifold fixed points (non-minimal UED) or by...
Mrs
Asrin Abdolmaleki
(Department of Physics, University of Kurdistan)
In the present work, we reconstruct the different f(T)-gravity
models corresponding to the original and entropy-corrected versions
of the holographic and new agegraphic dark energy models. We also
obtain the equation of state parameters of the corresponding
f(T)-gravity models. We conclude that the holographic and new
agegraphic f(T)-gravity models behave like phantom or...
Dr
Yuming Wang
(Theoretische Physik 1,Fachbereich 7 (Physik),Universität Siegen)
We derive QCD light-cone sum rules for the hadronic matrix elements
of the heavy baryon transitions to nucleon. In the correlation
functions the $\Lambda_c,\Sigma_c$ and $\Lambda_b$ -baryons are
interpolated by three-quark currents and the nucleon distribution
amplitudes are used. To eliminate the contributions of negative
parity heavy baryons, we combine the sum rules obtained...
Mr
Nikolai Zerf
(Institut fuer Theoretische Teilchenphysik, Karlsruhe Institute of Technology (KIT))
We present our calculation of the NNLO production cross section of the Higgs-boson via gluon fusion within the framework of an effective theory.
This includes the determination of the matching coefficient $C_1$, which contains all hard effects of the heavy SUSY particles, up to three loops in SUSY-QCD.
We will point out the correct treatment of the used supersymmetric regulator (DRED) during...
Chris Kelso
(Department of Physics, University of Chicago)
This talk will present on an independent analysis of the recent release of the first 15 months of CoGeNT's data. The analysis will focus on the properties of a dark matter particle that are consistent with the spectrum and modulation of the low energy excess of events in the detector. I will also examine the data in light of the new CRESST results and present prospects of detecting such a...
Prof.
Sergei Ketov
(Tokyo Metropolitan University, Japan)
Inflationary (slow-roll) dynamics in the gravity theory with a non-minimal scalar-curvature coupling can be equivalent to that in the certain f(R) gravity theory. We briefly review that correspondence and extend it to N=1 supergravity. The nonminimal coupling in supergravity is rewritten in terms of the standard (minimal) N=1 matter-coupled supergravity, by using their manifestly...
Mr
Jens Hoff
(Institute for Theoretical Particle Physics (TTP), Karlsruhe Institute of Technology (KIT))
Current correlators provide an important tool to relate theoretical calculations and experimental measurements. In this talk non-diagonal correlators of scalar, pseudoscalar, vector and axialvector currents are considered coupling to fermions with two different masses m_1 and m_2. We evaluate moments up to three-loop order considering the hierarchies m_1 >> m_2 and m_1 = m2. It is shown that...
Mr
Johannes Noller
(Imperial College London)
In inflationary theories, single field models are typically considered subject to slow-roll conditions. However, as I will show in this talk, current observational constraints allow significant violations of these conditions. Focusing on non-Gaussian signals, I will discuss a variety of new observational signatures that can be found for fast-rolling single fields.
Mr
Benedikt Biedermann
(Humboldt-Universität zu Berlin)
We present the publicly available program NGLUON allowing the numerical evaluation of colour-ordered amplitudes at one-loop order in massless QCD. The current version for an arbitrary number of external gluons is extended to an arbitrary number of quark flavours. Besides numerical stability and performance issues, we discuss the reconstruction of the full QCD amplitudes from color-ordered...
Prof.
Kayoomars Karami
(Department of Physics, University of Kurdistan)
We reconstruct the
different f(T)-gravity models corresponding to a set of dark
energy scenarios containing the polytropic, the standard Chaplygin,
the generalized Chaplygin and the modified Chaplygin gas models. We
also derive the equation of state parameter of the selected
f(T)-gravity models and obtain the necessary conditions for
crossing the phantom-divide line.
Ms
Maneenate Wechakama
(Leibniz Institute for Astrophysics Potsdam)
The rotation curves of spiral galaxies are one of the basic predictions of the cold dark matter paradigm, and their shape in the innermost regions has been hotly debated over the last decades. The present work shows that dark matter annihilation into electron-positron pairs may affect the observed rotation curve by a significant amount. We adopt a model-independent approach, where all the...
Ms
Dorota Sokolowska
(University of Warsaw, Faculty of Physics)
We analyse the thermal evolution of the Universe in the Inert Doublet Model for known three regions of Dark Matter masses: low mass (4 - 8) GeV, medium mass (30 - 80) GeV and high mass (500 - 1000) GeV. We argue that those three regions of DM mass exhibit different behaviour, both in the possible types of evolution and in the energy relic density values. We use use the masses of the scalar...
Friðrik Freyr Gautason
(Leibniz Universität Hannover)
I present numerical simulations of formation and evaporation of two dimensional charged black holes. I will start by introducing the model we use and explain the challenges we meet when we try to study the internal structure of black holes. I will then summarize the algorithm used and present results. In the classical case we observe the equivalent of the so-called mass inflation scenario for...
Mr
Maik Hoeschele
(Institut für Theoretische Teilchenphysik, Karlsruher Institut für Technologie)
The framework of simultaneous decoupling of two heavy quarks in QCD is
discussed. In particular we compute the decoupling constant for $\alpha_s$
with massive charm and bottom quarks to three-loop accuracy taking
into account the exact dependence on $m_c/m_b$. The application of a
low-energy theorem on this quantity allows for the extraction of the
three-loop effective...
Mr
Luca Marzola
(University of Southampton)
Leptogenesis is a broad class of models in which the observed Baryon Asymmetry of the Universe arises from a first lepton asymmetry. Furthermore, being Leptogenesis a cogent embedding for the seesaw mechanism, in these models neutrinos are provided a mass that matches the mass scale suggested by oscillation experiments in a natural way. In our work we consider a specific Leptogenesis model,...
Melanie Heil
(Karlsruhe Institute for Technology)
On May 19th 2011 the Alpha Magnetic Spectrometer 02 (AMS-02) was mounted on the International Space Station (ISS). Since then the detector is measuring the spectrum of cosmic rays (CRs) and gamma rays with unpreceded accuracy at an unpreceded rate. AMS-02 is able to measure charged CRs up to Iron and up to TeV energies. The first task of analysis is the calibration of the detector in space....
Kai Schmidt-Hoberg
(Oxford University)
We determine the degree of fine-tuning needed in a generalised version of the NMSSM that follows from an underlying Z4 or Z8 R-symmetry. We find that it is significantly less than is found in the MSSM or NMSSM and remarkably the minimal fine-tuning is achieved for Higgs masses of 130 GeV - 140 GeV.
Mr
Nachiketa Chakraborty
(Department of Astronomy, University of Illinois, Urbana-Champaign)
The primordial abundances of light elements form an important evidence of the Big Bang Model of the universe. With precise measurements of the baryon-to-photon ratio, \eta from WMAP, these final abundances, which are functions of \eta alone in general, are fixed and must be consistent. As a result, any discrepancy between the theoretical and observational abundances of these elements, as...
Mr
Daniel Junghans
(Leibniz Universität Hannover)
We investigate whether vacuum solutions in flux compactifications that are obtained with smeared sources (orientifolds or D-branes) still survive when the sources are localised. This seems to rely on whether the solutions are BPS or not. We then use a specific setup with SUSY-breaking branes to further investigate this issue and show, for a wide class of boundary conditions, that there is no flux...
Ms
Laura van den Aarssen
(Universität Hamburg)
The expansion of the Universe causes DM annihilations to cease at chemical decoupling, but the DM is still kept in thermal equilibrium until kinetic decoupling. The temperature $T_{\text{kd}}$ at which this happens translates directly into a small-scale cutoff for the matter density fluctuations. After kinetic decoupling the WIMP temperature decreases more quickly than the heat bath...
Mr
Thomas Hermann
(Institut für Theoretische Teilchenphysik Karlsruhe)
In this talk the calculation of the three-loop DRbar renormalization constants for the squark wave function and mass are discussed in the framework of supersymmetric QCD.
We introduce the general framework and describe in detail the reconstruction of the exact mass-dependence of the dimension-two scalar correlators.
From the renormalization constants the results for the corresponding...
Mr
Sebastian Halter
(Max-Planck-Institut für Physik)
We discuss the phenomenologically interesting scenario of matter inflation in supersymmetric hybrid inflation models. The inflaton is contained in a gauge non-singlet matter multiplet and the eta-problem is solved by a "Heisenberg" symmetry. This symmetry relates the inflaton with a modulus field and we stabilize this modulus via corrections to the Kähler potential. The Heisenberg symmetry...
Dr
Atsushi Watanabe
(Department of Physics, Niigata University)
We study the signatures of the Glashow resonance process $\bar{\nu}_e e \to W $ in the
high-energy astrophysical neutrino observatory IceCube.
We note that in addition to the standard hadronic and electromagnetic showers produced
by an incoming neutrino at the resonance energy of $E_\nu \approx 6.3$ PeV,
there are two clear signals of the process: the ``pure muon" from
$\bar{\nu}_e e...
