21-26 July 2014
Renold Building
Europe/London timezone
SUSY Phenomenology
Place
Location: Renold Building
Date:
from 21 Jul 14:30 to 25 Jul 18:30
Conveners
-
21 Jul 14:30 - 15:50
- King, Steve (University of Southampton)
-
21 Jul 16:30 - 18:10
- Dr. Fiascaris, Maria (University of Chicago)
-
22 Jul 14:30 - 15:50
- Dr. D'Onofrio, Monica (University of Liverpool)
-
22 Jul 16:30 - 18:30
- Robens, Tania (IKTP, TU Dresden)
-
24 Jul 14:30 - 15:50
- Prof. Wagner, Carlos (The University of Chicago and Argonne National Laboratory)
-
25 Jul 14:30 - 15:50
- Dr. Vivarelli, Iacopo (University of Sussex)
-
25 Jul 16:30 - 18:30
- Prof. Muehlleitner, Milada Margarete (Karlsruhe Institute for Technology)
Timetable | Contribution List
Displaying 31
contributions
out of
31
In the first three years of running, the LHC has delivered a wealth of new data that is now being analysed. With over 20 fb−1 of integrated luminosity, both ATLAS and CMS have performed many searches for new physics that theorists are eager to test their model against. However, tuning the detector simulations, understanding the particular analysis details and interpreting the results can be a te
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Presented by Dr. Jong Soo KIM
on
22/07/2014
at
16:10
Near the tip of the stau coannihilation strip in the CMSSM with a neutralino LSP, the astrophysical cold dark matter density constraint forces the stau-neutralino mass difference to be small. If this mass difference is less than the mass of the tau lepton, the stau may decay either in the outer part of an LHC detector -- giving a "disappearing track" signature -- or be sufficiently long-lived to l
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Presented by Dr. Nishita DESAI
on
21/07/2014
at
16:10
Recent measurements by Planck, the LHC experiments and dark matter direct detection experiments yield significant constraints on supersymmetric models and their parameters. Illustrating first the impact on the mSUGRA/CMSSM parameter space, we then go beyond and perform a detailed analysis of the general MSSM with 13 free parameters. Using the SFitter tool, Bayesian and Frequentist approaches are a
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Presented by Michael RAUCH
on
22/07/2014
at
16:50
Calculations of the relic density within the MSSM rely on information
about the mass both of the LSP and of other particles which play a key
role in the dominant mechanisms of annihilation.
Direct searches at the LHC have not yet detected any SUSY particles,
however in the upcoming 14 TeV run ATLAS and CMS will close in on sub-TeV
electroweakinos and third generation fermions. The extremely h
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Presented by Gudrid MOORTGAT-PICK
SUSY models with a modified dark sector require constraints to be reinterpreted, which may allow for scenarios with low tuning. A modified dark sector can also change the phenomenology greatly. The addition of the QCD axion to the MSSM solves the strong CP problem and also modifies the dark sector with new dark matter candidates. This talk describes scenarios where the axion's superpartner, the ax
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Presented by Mr. Christopher REDINO
on
21/07/2014
at
15:10
We study LHC signatures of displaced vertices and long-lived charged particles within the context of the Next-to-Minimal Supersymmetric Standard Model with right-handed (RH) sneutrinos. In this construction the RH neutrino can be produced directly from Higgs decays or in association with a RH sneutrino when the latter is the lightest supersymmetric particle. The RH neutrino is generally long-lived
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Presented by Mr. Victor MARTIN-LOZANO
on
25/07/2014
at
16:30
The identification of the underlying new physics model is one of the main issues of present and future colliders.
We are interested in the distinction between different supersymmetric
models, the MSSM and the NMSSM. We study tricky cases where the Higgs sector alone is not
sufficient to distinguish the models. Exploring the chargino/neutralino sector can be a useful alternative to the
Higgs se
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Presented by Mr. Stefano PORTO
on
25/07/2014
at
16:50
Constrained SUSY models like the CMSSM might look less attractive nowadays because of fine tuning arguments. They also might look less probable in terms of Bayesian statistics. The question how well the model under study describes the data, however, is answered by frequentist p-values. Thus, for the first time, we calculate p-values for the CMSSM by performing dedicated toy experiments. We combine
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Presented by Mr. Bjoern SARRAZIN
on
24/07/2014
at
13:30
We discuss a possible explanation of a slight excess in the WW cross section measurement performed by ATLAS and CMS. While still consistent with the Standard Model within 1-2 sigma, the excess could be also a first hint of physics beyond the Standard Model. We argue that this effect could be attributed to the production supersymmetric particles, eg. stops or charginos. The stops of mass ~200 GeV h
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Presented by Dr. Krzysztof ROLBIECKI
on
22/07/2014
at
14:10
I will discuss the possibilities of spontaneous breaking of R-parity and of CP in the NMSSM model, which contains additionally right handed neutrinos. In the case of R-parity breaking, I'll concentrate on the effects on Higgs production and decay, with special emphasis on diphoton mode. In the case of spontaneous CP violation, I will discuss the effects on neutralino and sneutrino dark matter. I w
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Presented by Prof. Katri HUITU
on
25/07/2014
at
16:10
In this talk, the latest results from CMS on inclusive searches for squark and gluino pair production in events containing jets and missing energy are reviewed. A variety of complementary methods and discriminants based on event kinematics are deployed to suppress standard-model backgrounds. Results are interpreted in the context of several different SUSY model scenarios using up to 20/fb of data
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Presented by Kristin GOEBEL
on
22/07/2014
at
13:30
Despite the absence of experimental evidence, weak scale supersymmetry remains one
of the best motivated and studied Standard Model extensions. This talk summarises
recent ATLAS results on inclusive searches for supersymmetric squarks and gluinos,
Results are presented for searches in final state events containing jets, missing transverse
momentum, light leptons or taus.
Presented by zuzana RURIKOVA
on
22/07/2014
at
13:50
At the Large Hadron Collider (LHC), many new physics signatures feature pair-production of massive particles with subsequent direct or cascading decays to weakly interacting particles, such as SUSY scenarios with conserved R-parity or $H \to W(\ell\nu)W(\ell\nu)$, often motivated by models of new physics which attempt to mitigate the hierarchy problem in the Standard Model. While final states cont
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Presented by Dr. Christopher ROGAN
on
22/07/2014
at
16:50
We examine the issue of fine tuning in the MSSM with GUT-scale boundary conditions. We focus on a phenomenologically interesting region that is favored by the Higgs mass measurement and the relic density, where the dark matter is a nearly pure higgsino with mass ~1 TeV, while the scalars and gauginos have masses in the multi-TeV regime.
We identify specific unification patterns that can lead to a
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Presented by Dr. Kamila KOWALSKA
on
25/07/2014
at
14:50
I will discuss multilepton signals at the LHC arising from electroweak processes involving sleptons. I focus on models in general gauge mediation where the low-mass region of the superpartner spectrum consists of the charged sleptons and the nearly massless gravitino. Such models can provide an explanation for the anomalous four lepton events recently observed by the CMS Collaboration. Our setup a
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Presented by Karen DE CAUSMAECKER
on
24/07/2014
at
14:30
We present a complete and extensive analysis of associated chargino and neutralino production in the framework of a supersymmetric theory augmented by left-right symmetry. This model provides additional gaugino and higgsino states in both the neutral and charged sectors, thus potentially enhancing new physics signals at the LHC. For a choice of benchmark scenarios, we simulate events expected to b
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Presented by Benjamin FUKS
on
25/07/2014
at
15:10
I will discuss how the usual phenomenology of gauge mediated supersymmetry breaking can be significantly modified by the non-minimal assumption that supersymmetry is broken in more than one hidden sector. Such multiple hidden sector models give rise to light neutral fermions called pseudo-goldstini and due to the extra decay steps they provide, where soft photons are emitted, these models give ris
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Presented by Christoffer PETERSSON
on
21/07/2014
at
15:30
We review recent calculations of SUSY particles decaying to Higgs bosons (and another SUSY particle). We discuss the phenomenological implications for the LHC seaches and the Linear Collider phenomenology.
Presented by Dr. Federico VON DER PAHLEN
on
21/07/2014
at
16:30
We show that the essential feature of SUSY naturalness is the presence of light Higgsinos
with mass the closer to m(h) the better. The expected spectra gives rise to a unique same-sign diboson signature for LHC but a definitive test will require ILC with sqrt(s)~500-600 GeV. The perfectly natural Little Hierarchy might be a reflection of mismatch between PQ breaking scale and hidden sector mass
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Presented by Prof. Howard BAER
on
21/07/2014
at
15:30
Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks with masses not too far from those of their Standard Model counterparts. Top or bottom squarks with masses less than a few hundred GeV can give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. Real and virtual produc
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Presented by Dr. Maria FIASCARIS
on
21/07/2014
at
13:50
Several supersymmetric scenarios predict massive long-lived particles. Such particles may be detected through abnormal specific energy loss, appearing or disappearing tracks,
displaced vertices, long time-of-flight, late calorimetric energy deposits or non-pointing photons.
The talk presents recent results from searches for long-lived supersymmetric particles with the ATLAS detector.
Presented by Elisa GUIDO
on
22/07/2014
at
16:30
Supersymmetric theories with non-minimal field content can accommodate light scalar(s), pseudoscalar(s) and neutralino(s) in certain regions of the parameter space. These states, through their presence in the decay cascades of the heavier particles can lead to novel signatures at the LHC. This conclusion is not only limited to the supersymmetric particles but also extended for the heavy standard m
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Presented by Dr. Pradipta GHOSH
on
24/07/2014
at
14:10
With new results and limits on constrained models of supersymmetry (SUSY) from the ATLAS and CMS collaborations at the LHC, questions arise about what these limits imply for more general models of SUSY or other models for physics beyond the Standard Model. Since SUSY has a vast array of parameters, both collaborations also quantify their search results in terms of simplified models, augmenting the
... More
Presented by Jory SONNEVELD
on
22/07/2014
at
17:30
We review the recent results of the MasterCode collaboration on fits of the CMSSM and the NUHM1. We take into account the constraints from Run I at the LHC, as well as all relevant available constraints from Higgs searches, Dark Matter, flavor physics and electroweak precision data.
Presented by Dr. Henning FLAECHER
on
21/07/2014
at
15:50
We present a maximally symmetric Two Higgs Doublet Model (2HDM), where the scalar potential possesses an Sp(4)/Z_2 symmetry in the \Phi-space
which is isomorphic to SO(5) in the bilinear field space. The usual custodial symmetries of the 2HDM potential are identified as certain subsets of this maximal symmetry group. We analyze the mass spectrum for the charged (H^+, H^-), CP-even scalar (h, H)
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Presented by Dr. Bhupal DEV
on
24/07/2014
at
13:50
We explore the impact of current (7+8 TeV) and future (14 TeV) LHC searches on the range of viable sparticle spectra within the 19/20 – dimensional pMSSM. Considering both neutralino and gravitino LSPs, we compare our results with simplified model exclusion limits and describe important cases where the pMSSM results differ significantly from the simplified model descriptions. We also consider mo
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Presented by Matthew CAHILL-ROWLEY
on
21/07/2014
at
13:30
One of the most important outcomes of the experiments at the LHC is the Higgs mass, which turned out to be slightly heavier than naive expectation in the Minimal Supersymmetric Standard Model (MSSM). It might imply that the stop masses are heavy and the Higgs sector is fine-tuned. However, an alternative possibility is that there is an additional singlet supermultiplet and the Higgs mass is raised
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Presented by Dr. Kwang Sik JEONG
on
25/07/2014
at
15:50
Signal events where multiple missing neutral particles are present in a final state represent challenging topologies to search for new physics at the LHC. The key to any search is the ability to separate background-like events from signal-like events. Identifying such signal-like events, and extracting their properties, is exacerbated by a lack of knowledge of the particle masses and some missing
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Presented by Dr. Paul JACKSON
on
25/07/2014
at
15:30
In this talk, I will briefly review the triplet extended MSSM, and then show that for a sizable portion of viable parameter space, associated with a large but still perturbative triplet coupling, the model features conspicuously smaller fine-tuning than in the case of MSSM-like couplings. I will then present the results of a fit to Higgs physics data as well as to low energy observables like the B
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Presented by Dr. Stefano DI CHIARA
on
25/07/2014
at
15:30
Motivated by the discovery of a Higgs particle, with a
relatively large mass and many production and decay modes under study,
I consider a phenomenological U(1)-extension of the MSSM. Such extensions, while maintaining all the benefits of the MSSM such as unification, give extra contributions to the Higgs mass, as well as extra D-term contributions to the stop masses,
which can improve naturaln
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Presented by Mr. Agamemnon SFONDILIS
on
25/07/2014
at
14:30
The stop mass is often constrained using simplified models, where it is assumed that all stops decay via a single decay mode. This is not usually the case in realistic models so limits derived from any single simplified model tend to be too strong. To derive more accurate limits one should instead combine information from several different simplified models. I will present a fast and easy techniqu
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Presented by Dr. James BARNARD
on
22/07/2014
at
15:30