Ketevi Adikle Assamagan
(Brookhaven National Laboratory (US))
12/15/14, 9:10 AM
A detailed review of the latest results on the main properties of
the Higgs boson using approximately 25 fb-1 of pp collision
data collected at 7 TeV and 8 TeV in 2011 and 2012, will be given.
The measurements of the mass, couplings properties and main quantum
numbers will be presented. Prospects for the next LHC Run
starting in 2015 will be reviewed.
Roko Plestina
(Chinese Academy of Sciences (CN))
12/15/14, 9:55 AM
An overview of Higgs boson results from CMS is presented using pp collision data collected at centre-of-mass energies of 7 and 8 TeV corresponding to integrated luminosities of 5/fb and 20/fb respectively.
The combination of the coupling results of all Higgs boson decay channels measured at CMS is presented with
various fits looking for deviations of the couplings from the Standard Model...
Matteo Bauce
(Universita e INFN, Roma I (IT))
12/15/14, 10:45 AM
After the discovery at the LHC in 2012 of a scalar boson with a mass of 125 GeV, which has been found to be an ideal Higgs boson candidate, it is fundamental to understand not only the properties of such particle, but the structure of the whole Higgs sector itself. Several SM extensions (BSM models) predict the existence of additional Higgs bosons which should also couple to the SM particles,...
Oscar Stål
(DESY)
12/15/14, 3:00 PM
Bohdan Grzadkowski
(University of Warsaw)
12/15/14, 3:45 PM
We extend the two-Higgs doublet models of Type I and Type II by adding a real gauge-singlet scalar $S$ which is the Dark Matter (DM) candidate (2HDMS models). We impose theoretical constraints derived from perturbativity, stability, unitarity and correct electroweak symmetry breaking and require that the lightest CP-even Higgs, $h$, fit the LHC data for the $\sim 125.5$ GeV state at the...
Prof.
Per Osland
(University of Bergen (NO))
12/15/14, 4:05 PM
I shall review an extension of the Inert Dark Matter model, that also allows for CP violation in the scalar sector. This kind of model contains charged scalars that could be produced at the LHC, and emit SM particles via virtual W or Z emission in its decay to dark matter.
Margarida Nesbitt Rebelo
(Instituto Superior Tecnico (IST))
12/15/14, 4:25 PM
I shall report on work in progress in the framework of three Higgs doublets with an S3 symmetry providing a dark matter candidate. This is still very preliminary and I shall focus on the main questions we want to address.
William Kalderon
(University of Oxford (GB))
12/15/14, 4:45 PM
Supersymmetry (SUSY) is a theoretically attractive extension to the Standard Model of particle physics with the potential to solve several of its theoretical problems. For instance, the nature and production of dark matter is explained in SUSY by the existence of new stable, weakly interacting particles. A search for the production of supersymmetric partners of the charm quark will be...
Alexandre Arbey
(Lyon U.)
12/15/14, 5:35 PM
The Minimal Supersymmetric extension of the Standard Model (MSSM) provides suitable candidates for Dark Matter. In this talk, I will discuss the constraints from Dark Matter direct detection, Planck results and LHC SUSY, Higgs and monojet data, and show that complementary of the different sectors is of importance to probe the pMSSM parameter space.
Saeid Paktinat Mehdiabadi
(School of Particles and Accelerator Inst. for Res. in Fundam. S)
12/15/14, 6:20 PM
This talk reviews the latest Dark Matter (DM) results from the CMS experiment, consisting in searches for DM particles under the form of Weakly Interactive Massive Particles. The search for directly produced DM particles exploits final states containing a high momentum single object and missing transverse energy, such as monojet, monophoton, monolepton and monotop. The production of DM...
Jan Oye Lindroos
(University of Bergen (NO))
12/15/14, 6:40 PM
We scan the 19 parameter pMSSM in search of experimentally viable models which can potentially be discovered by ATLAS during Run 2.
Laura Covi
(Goettingen University)
12/15/14, 7:00 PM
We introduce minimal models of decaying Dark Matter, characterized by the fact that DM interacts with SM particles through one renormalizable coupling with an additional heavier SM charged state. Such interaction allows to produce a substantial abundance of DM in the early Universe via the decay of the charged heavy state, either in- or out-of-equilibrium. Moreover additional couplings of the...
Oleg Lebedev
(University of Helsinki)
12/16/14, 9:00 AM
I will discuss some aspects of the Higgs portal models, in particular, their cosmological implications as well as possible signatures at the LHC.
Jussi Virkajärvi
(urn:Google)
12/16/14, 9:45 AM
We study the electroweak phase transition in class of classically (non)conformal Higgs portal models, with and without Veltman conditions imposed for the scalar sector. Some of the models include also fermionic type dark sector, which can be related to dark matter or neutrino masses.
We find, by scanning the model parameter spaces,many realizations of the models, where the electroweak phase...
Anders Kvellestad
(University of Oslo)
12/16/14, 10:35 AM
Recently CMS reported a small excess in a search for opposite-sign same-flavor leptons produced in conjunction with two jets and missing transverse momentum. The excess was found to be consistent with a kinematic edge in the invariant mass spectrum of the leptons. We present a possible interpretation of this excess in terms of squark pair production followed by a ‘golden cascade’ decay for one...
Christophe Clement
(Stockholm University (SE))
12/16/14, 10:55 AM
The ATLAS experiment at CERN performs several dedicated searches for Dark Matter production, using mono-jet plus missing energy signals and mono-X plus missing energy where X can be for instance a W or Z boson or a photon. The latest constraints on Dark Matter from these searches are presented and include limits derived from search for Higgs to invisible decays.
David Salek
(NIKHEF (NL))
12/16/14, 11:15 AM
Both ATLAS and CMS have been using effective field theory approach to describe their results in terms of the DM pair-production in Run-1. Whereas the effective field theory is well applicable in the case of the direct detection experiments, it is facing severe criticism when used at colliders where the actual inferred limits on the suppression scale are comparable to the centre-of-mass energy....
Philip Bechtle
(Deutsches Elektronen Synchrotron (DESY))
12/16/14, 3:00 PM
Prof.
Roger Barlow
(MANCHESTER UNIVERSITY)
12/16/14, 3:45 PM
New Higgs scalars with masses up to 10 GeV are predicted in models such as NMSSM, and in scenarios with hidden sectors that couple weakly to the Standard Model. Searches at B factories have resulted in tight constraints on such models. The talk will cover the recent searches and new results, and discuss the future outlook for this physics.
Andrea Coccaro
(University of Washington (US))
12/16/14, 4:05 PM
The particle nature of dark matter is one of the most intriguing questions in particle physics. The discovery of a fundamental scalar particle compatible with the Higgs boson predicted by the SM paves the way for probing this question with new methods. An overview of the LHC Run-I legacy results in looking for both exotic Higgs decays with dedicated searches and invisible Higgs decays is...
Catarina Espirito Santo
(LIP)
12/16/14, 4:25 PM
Recent progress on the field of ultra high-energy cosmic rays (UHECR) has
been driven by the data colected by the Pierre Auger Observatory in the
southern hemisphere and by Telescope Array (TA) in the northern hemisphere.
These hybrid observatories combine large ground arrays with fluorescence
detection techniques. In this presentation, selected results from Auger
and TA will be...
Mr
Tommi Tenkanen
(University of Helsinki and Helsinki Institute of Physics)
12/16/14, 4:45 PM
A generic feature of Standard Model extensions with no drastic modifications to the
Higgs potential is that the Higgs is a light and energetically subdominant field during
inflation. Inflationary fluctuations generically displace the field from its vacuum generating a primordial Higgs condensate. This sets specific out-of-equilibrium initial conditions for the hot big bang epoch which could...
PIERRE SALATI
(LAPTh and Université de Savoie)
12/16/14, 5:35 PM
Although the existence of the astronomical dark matter is by now well established, its nature is still unresolved. The favoured candidate is a massive and weakly interacting neutral particle, dubbed WIMP, whose relic abundance is compatible with cosmological measurements. If present inside the haloes of galactic systems, these species still annihilate and yield distortions in the various...
Dr
Seyed Yaser Ayazi
(IPM)
12/16/14, 6:20 PM
We study collider phenomenology of inert triplet scalar dark matter at the LHC.
We discuss possible decay of Higgs boson to dark matter candidate and apply current experimental data for invisible Higgs decay and $R_{\gamma\gamma}$ to constrain parameter space of our model. We also investigate constraints on dark matter coming from forthcoming measurement, $R_{Z\gamma}$ and mono-Higgs...
Lars Andreas Dal
(University of Oslo)
12/16/14, 6:40 PM
Due to its low astrophysical background, the antideuteron channel is a highly promising channel for indirect detection of dark matter.
Being an antinucleus, the antideuteron flux has additional uncertainties from the nucleus formation model that are not relevant for other indirect detection channels.
The antideuteron formation model depends on very small momentum differences between...
Robert Wagner
(Stockholm University)
12/16/14, 7:00 PM
In recent years, ground-based very-high energy (E>50 GeV) gamma-ray instruments like H.E.S.S., MAGIC, and VERITAS have taken on a major role in high-energy astrophysics. The high sensitivity and performance parameters, still far from the limits of the observation technique though, have lead to the detection and enabled studies of more than 100 sources of various source populations. The...
Lillian Smestad
(University of Bergen (NO))
12/17/14, 9:00 AM
The strategy for the ATLAS pMSSM summary effort, which will lead to one of the so-called legacy papers of the collaboration, is presented. A flat scan of the pMSSM parameter space is performed by Tom Rizzo, an ATLAS short term associate. Various constraints are imposed for the scan to select viable models. A broad selection of searches in ATLAS is implemented. The selected models are first...
joseph silk
(IAP)
12/17/14, 9:20 AM
