21-26 July 2014
Renold Building
Europe/London timezone
Particle Cosmology
Place
Location: Renold
Room: F14
Date:
from 21 Jul 14:30 to 25 Jul 18:10
Conveners
-
21 Jul 14:30 - 15:50
- Mr. Hambye, Thomas Hambye (Service de Physique Théorique, ULB-Brussels)
-
21 Jul 16:30 - 18:30
- Mr. Hambye, Thomas Hambye (Service de Physique Théorique, ULB-Brussels)
-
22 Jul 14:30 - 15:50
- Dr. Masina, Isabella (University of Ferrara)
-
22 Jul 16:30 - 18:30
- Mr. Hambye, Thomas Hambye (Service de Physique Théorique, ULB-Brussels)
-
24 Jul 14:30 - 15:50
- Dr. Masina, Isabella (University of Ferrara)
-
25 Jul 14:30 - 15:50
- Mr. Bezrukov, Fedor (University of Connecticut and CERN)
-
25 Jul 16:30 - 18:10
- Prof. Nath, Pran (Northeastern University)
Timetable | Contribution List
Displaying 33
contributions
out of
33
A solution to the baryon-DM coincidence problem in the mSUGRA/CMSSM model with a 126 GeV Higgs boson
We have investigated the Affleck-Dine baryogenesis in detail and have shown that the baryon-dark matter coincidence problem can be solved in the mSUGRA/CMSSM model with a 126 GeV Higgs boson. The baryons and dark matter are generated simultaneously through the late-time decay of non-topological solitons, Q-balls, which are formed after the Affleck-Dine baryogenesis. A relation between the universa
... More
Presented by Mr. Masaki YAMADA
on
25/07/2014
at
15:10
R-parity violation is getting more attention as a possible alternative to natural supersymmetry in the current LHC searches. We investigate whether the baryon asymmetry of the universe is explained in the framework of the supersymmetric extension of the Standard Model with R-parity violating interactions. It is shown that the Affleck-Dine mechanism naturally works via a trilinear interaction $LLE^
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Presented by Dr. Ken'ichi SAIKAWA
on
24/07/2014
at
14:15
Axino interacts weakly with ordinary matter and can be a good candidate of dark matter. In the case where R-parity is violated, axino dark matter decays slowly and can have interesting signatures in the form of cosmic rays. Here, we show two concrete examples of decaying axino dark matter that can explain the recently observed astrophysical anomalies: 130 GeV gamma-ray line from the Galactic Cente
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Presented by Mr. Seng Pei LIEW
on
25/07/2014
at
14:50
With the indications for r > 0.1 by BICEP2, there have been discussions on whether all small-field models of inflation can be ruled out due to the Lyth bound, or if the Lyth bound can be evaded by specific choices of the inflaton potential. We show that in single-field slow-roll inflation, it is impossible to reconcile r > 0.1 with field excursions \Delta \phi << M_pl, independently of the form of
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Presented by David NOLDE
on
22/07/2014
at
16:10
The detection of tensor modes by the BICEP2 experiment has been interpreted as the first direct evidence of cosmological inflation. The magnitude of the tensor perturbations is consistent with simple models of chaotic inflation with a quadratic potential; however, the realization of chaotic inflation and baryogenesis in supergravity is a non-trivial task. The SUSY breaking energy density generally
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Presented by Marcos A GARCIA GARCIA
on
22/07/2014
at
16:30
In this work we will illustrate how to constrain unavoidable K\"ahler corrections for N=1 supergravity (SUGRA) inflation from the recent Planck data. We will show that the non-renormalizable K\"ahler operators will induce in general non-minimal kinetic term for the inflaton field, and two types of SUGRA corrections in the potential - the Hubble-induced mass ($c_{H}$), and the Hubble-induced A-term
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Presented by Mr. Sayantan CHOUDHURY
on
21/07/2014
at
14:30
The result of BICEP2 strongly suggests that there exists primordial gravitational wave background. We have investigated how precisely we can determine the inflationary parameters, i.e. the amplitude of the tensor power spectrum, the tensor spectral index and its running, by future interferometer experiments in high-TR(reheating temperature) case. We also investigated the sensitivity of future expe
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Presented by Mr. Ryusuke JINNO
on
22/07/2014
at
15:30
It is known that time-varying masses cause particle production. We shall discuss particle production of interacting bosons and fermions in the context of supersymmetric models. In such models both bosonic and fermionic particles are produced, since their masses are controlled by the same background scalar fields. We shall focus on the resulting abundance of fermions, taking into account supersy
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Presented by Dr. Seishi ENOMOTO
on
25/07/2014
at
15:30
The viability of thermal leptogenesis scenarios can be investigated model independently at the LHC. We show that once a non-zero cross section of a lepton number violating process is measured, a strong lower limit can be set on the washout factor for the effective lepton number density in the early universe at times close to the electroweak phase transition. We further demonstrate that this in tur
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Presented by Dr. Julia HARZ
on
21/07/2014
at
16:30
In arXiv: 1404.1003, we develop a fully flavour-covariant formalism for transport phenomena. A significant and novel element of this formulation is the inclusion of rates that carry higher-rank tensorial structure in flavour space. In this talk, we illustrate the necessary appearance of such rates by means of a generalization of the optical theorem, making connection with the unitarity cuts of par
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Presented by Dr. Peter MILLINGTON
on
21/07/2014
at
16:10
Flavour effects play an important role in the statistical evolution of particle number densities in several particle and astroparticle physics phenomena. A fully flavour-covariant formulation of transport phenomena is presented, with a Resonant Leptogenesis (RL) scenario in mind, in order to capture all flavour effects, both in the heavy-neutrino and charged-lepton sectors. For concreteness, we co
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Presented by Mr. Daniele TERESI
on
21/07/2014
at
16:50
The discovery of a Standard Model-like Higgs boson and the hitherto absence of evidence for other new states may indicate that if WIMPs comprise cosmological dark matter, they are heavy compared to electroweak scale particles, M >> m_{W^\pm}, m_{Z^0}. In this limit, the absolute cross section for a WIMP of given electroweak quantum numbers to scatter from a nucleon becomes computable in terms of S
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Presented by Prof. Richard HILL
on
25/07/2014
at
17:30
In Split-SUSY with BRpV we show that the Gravitino DM solution is consistent with experimental evidence on its relic density and life-time. We arrive to this conclusion performing a complete numerical and algebraic study of the parameter space, including constraints from the recently determined Higgs mass, updated neutrino physics, and BBN constraints to NLSP decays. The Higgs mass requires a rela
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Presented by Mr. Boris PANES
on
25/07/2014
at
17:10
The observed value of the Higgs mass indicates that the Higgs potential becomes small and flat at the scale around 1017GeV. Having this fact in mind, we reconsider the Higgs inflation scenario proposed by Bezrukov and Shaposhnikov. It turns out that the non-minimal coupling ξ of the Higgs-squared to the Ricci scalar can be smaller than ten. For example, ξ=7 corresponds to the tensor-to-scalar ra
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Presented by Mr. Yuta HAMADA
on
21/07/2014
at
15:10
Weakly interacting massive particle (WIMP) as a dark matter (DM) candidate is further inspired by recent AMS-02 data, which confirm the excess of positron fraction observed earlier by PAMELA and Fermi-LAT experiments. Additionally, the excess of positron+electron flux is still significant in the measurement of Fermi-LAT. For solving the problem of massive neutrinos and observed excess of cosmi
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Presented by Dr. Takaaki NOMURA
on
21/07/2014
at
17:50
We show in double inflation scenario where a second inflation
follows hybrid inflation, the supersymmetric hybrid inflation with a
coupling of the order of unity can generate a large tensor perturbatio.
This scenario would relax the tension between BICEP2 and Planck
concerning the tensor-to-scalar ratio, because a negative large running
can also be obtained for a certain number of e-fold of t
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Presented by Osamu SETO
on
22/07/2014
at
16:50
We consider scenarios of gravitino LSP and DM with stop NLSP both within R-parity
conserving and R-parity violating supersymmetry (RPC and RPV SUSY, respectively).
We discuss cosmological bounds from Big Bang Nucleosynthesis (BBN) and the gravitino
abundance and then concentrate on the signals of long-lived stops at the LHC as
displaced vertices or metastable particles.
Finally we discus
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Presented by Mr. Federico DRADI
on
25/07/2014
at
17:50
A high inflationary energy scale not only entails a measurably large tensor-to-scalar ratio, which (could be / has been) seen in the polarization of the cosmic microwave background, but also suggests a high reheating temperature after the end of inflation. The prime candidate for a viable mechanism to generate the baryon asymmetry of the universe as well as the dark matter relic abundance is then
... More
Presented by Dr. Kai SCHMITZ
on
21/07/2014
at
17:30
We augment the standard model gauge groups by an additional $U(1)_X$ group with the corresponding gauge boson, $Z^\prime$, in the context of the type-I seesaw. After breaking $U(1)_X$ with vacuum expectation values of even charge, the lightest of particles, one of the heavy neutrinos, with odd $U(1)_X $ charge is a dark matter candidate. We first find the minimum anomaly-free particle content and
... More
Presented by Dr. Wei-Chih HUANG
on
22/07/2014
at
15:10
We discuss the impact of Sommerfeld enhancements on the neutralino LSP relic abundance calculation for heavy neutralino dark matter including co-annihilations of nearly mass-degenerate neutralino and chargino states. Interesting regions in the MSSM parameter space are identified, focusing on heavy wino- and higgsino-like dark matter scenarios and models interpolating between the two cases. We inve
... More
Presented by Martin BENEKE
on
24/07/2014
at
13:45
I present a model independent analysis of thermal dark matter constraining its mass and interaction strengths with data from astro- and particle physics experiments. Using effective field theory to describe interactions of dark matter particles I cover real and complex scalar, Dirac and Majorana fermion, and vector boson dark matter candidates. I show posterior probability distributions for the
... More
Presented by Prof. Csaba BALAZS
on
22/07/2014
at
14:30
I will present the full one-loop supersymmetric QCD corrections for gaugino annihilation and co-annihilation into light and heavy quarks in the Minimal Supersymmetric Standard Model (MSSM). I will show that these channels are phenomenologically relevant within the so-called phenomenological MSSM. Numerical results for the (co-)annihilation cross sections and the predicted neutralino relic density
... More
Presented by Björn HERRMANN
on
24/07/2014
at
14:00
Several SUSY models with partially composite Higgs bosons coupled to a strong sector have been proposed. Such strong dynamics would help to cause the electroweak symmetry breaking naturally. We focus on the compositeness of the Higgsinos in such models. We show that such a Higgsino compositeness can induce the characteristic decay branching fraction of the neutralinos: The decay branching fraction
... More
Presented by Masaki ASANO
on
24/07/2014
at
14:35
Searches for Dark
Matter Production with Mono-objects and MET (CMS)
Presented by Ms. bhawna GOMBER
on
21/07/2014
at
14:30
Searches for Dark Matter Production with Mono-objects and MET in ATLAS
Presented by David SALEK
Searches for Dark Matter Production with Mono-objects and MET in ATLAS
Presented by David SALEK
on
24/07/2014
at
13:30
I will show how the current data (from WMAP+PLANCK+BICEP) and the future data on CMB can discriminate super-Planckian VEV models of inflation with a sub-Planckian VEV models of inflation. I will reconstruct the inflationary potential for a sub-Planckian excursion of a single inflaton field from WMAP+PLANCL+BICEP data, and embed such sub-Planckian VEV model of inflation within SUSY flat direction
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Presented by Dr. Anupam MAZUMDAR
on
22/07/2014
at
15:50
I will examine the relic abundance of supersymmetric dark matter in a scenario where the reheating temperature T_R of the Universe after inflation is low, in the range of tens or of hundreds of GeV. To this end I will solve the Boltzmann equation during and after the period of reheating, taking into account cosmological as well as collider constraints, in particular the recent Higgs boson discover
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Presented by Mr. Sebastian TROJANOWSKI
on
22/07/2014
at
13:50
We study the neutralino to be the lightest Supersymmetric particle (LSP) as a Dark Matter (DM) candidate with a mass 2-40 GeV in the framework of the Next-to-Minimal-Supersymmetric-Standard-Model (NMSSM). We find that with the current collider constrains from the LEP, Tevatron and LHC, there are three types of light DM solutions consistent with the direct/indirect searches as well as the relic abu
... More
Presented by Zhen LIU
on
25/07/2014
at
16:50
For a narrow band of values of the top quark and Higgs boson masses, the Standard Model Higgs potential develops a shallow local minimum at energies of about 10^16 GeV, where primordial inflation could have started in a cold metastable state. For each point of that band, the highness of the Higgs potential at the false minimum is calculable, and there is an associated prediction for the inflationa
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Presented by Dr. Isabella MASINA
on
22/07/2014
at
15:30
The LUX experiment searches for direct evidence of galactic dark matter. Located roughly 1.5 km underground at the Sanford Underground Research Facility in Lead, South Dakota (USA), the heart of the experiment is a 370 kg liquid-xenon target, instrumented as a dual-phase (liquid/gas) time projection chamber capable of 3-D position reconstruction and nuclear recoil discrimination. The initial sci
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Presented by Dr. Aaron MANALAYSAY
on
25/07/2014
at
14:30
We present results on the interplay of the LHC and direct dark
matter(DDM) experiments in probing the far focus point (FFP) region of natural supersymmetry, within the MSSM framework. This parameter space is characterised by low values of mu-parameter and a compressed spectrum for DM and the next-to-lightest neutralino and the lightest chargino -- which can only be probed via mono-jet signatu
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Presented by Dr. Alexander BELYAEV
on
21/07/2014
at
14:50
The XENON project utilises liquid xenon Time Projection Chambers (TPCs) to search for terrestrial evidence of dark matter, looking for spin-dependent and spin-independent interactions of WIMPs, as well as axio-electric couplings of axions and axion-like particles. The most recent XENON experiment, XENON100, completed 225 live-days of data taking in 2012. This run lead to one of the most stringent
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Presented by Dr. Andrew BROWN
on
25/07/2014
at
16:30