Conveners
SUSY Expt. and Phenomenology
- Sabine Kraml (LPSC Grenoble)
SUSY Expt. and Phenomenology
- Yael Shadmi (Technion)
SUSY Expt. and Phenomenology
- Rick Cavanaugh (University of Illinois at Chicago (US))
SUSY Expt. and Phenomenology
- Pietro Slavich (LPTHE Paris)
SUSY Expt. and Phenomenology
- JoAnne Hewett (SLAC)
SUSY Expt. and Phenomenology
- Tommaso Lari (University and INFN, Milano)
SUSY Expt. and Phenomenology
- Christian Sander (Hamburg University (DE))
SUSY Expt. and Phenomenology
- Hideki Okawa (University of Tsukuba (JP))
Pierfrancesco Butti
(Nikhef National institute for subatomic physics (NL))
24/08/2015, 14:30
Supersymmetry Phenomenology and Experiment
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 of a few hundred GeV can also give rise to large direct pair production rates at the LHC. The talk presents recent ATLAS results from searches for direct stop and sbottom...
Javier Mauricio Duarte
(California Institute of Technology (US))
24/08/2015, 14:50
Supersymmetry Phenomenology and Experiment
The latest results from CMS on searches for stop and sbottom squarks are presented. Searches for direct squark production and indirect production through gluino cascades in a variety of decay channels are reviewed. The results are based on 20 fb-1 of data collected during the 8 TeV LHC run.
Haipeng An
(Caltech)
24/08/2015, 15:10
Supersymmetry Phenomenology and Experiment
Light top superpartners play a key role in stabilizing the electroweak scale in supersymmetric theories. For R-parity conserved supersymmetric theories, traditional searches are not sensitive to the compressed region $m_{\tilde t}\approx m_\chi+m_t$ and $m_{\tilde t} \approx m_\chi + m_W + m_b$, where $\chi$ is the neutralino. In this talk, I will introduce a new observable $R_M$ whose...
Lawrence Lee Jr
(U of Adelaide)
24/08/2015, 15:30
Supersymmetry Phenomenology and Experiment
The "Recursive Jigsaw Technique" provides a powerful new approach to extract a kinematic basis of variables that can be used to categorise searches for new physics signals at the LHC. This talk will focus on topologies relevant to the LHC in 2015 namely strong production of gluinos and third generation squarks. We demonstrate sensitive analysis strategies to search for beyond standard model...
Alex Kastanas
(University of Bergen (NO))
24/08/2015, 16:30
Supersymmetry Phenomenology and Experiment
The talk presents searches for the prompt decay of supersymmetric particles in events containing photons or taus and large transverse missing momentum, performed by the ATLAS experiment. The final states considered are particularly motivated in gauge mediated supersymmetry breaking models with a light gravitino as the lightest supersymmetric particle. Results obtained with 20 fb-1 of pp...
Giovanna Francesca Cottin Buracchio
(University of Cambridge (GB))
24/08/2015, 16:50
Supersymmetry Phenomenology and Experiment
Several supersymmetric models predict massive long-lived supersymmetric particles with lifetimes from fractions of a nanosecond to lifetimes that are effectively stable in the detector. Such particles may be detected through abnormal specific energy loss, disappearing tracks, displaced vertices, long time-of-flight or late calorimetric energy deposits. The talk presents recent results from...
Dr
Sho Iwamoto
(Technion)
24/08/2015, 17:10
Supersymmetry Phenomenology and Experiment
This talk, based on arXiv:1505.02996, focuses on collider searches for long-lived charged particles (LLCPs), i.e., charged particles which are observed stable in the detectors.
Their discovery will be extremely exciting and give significant implication for both particle physics and cosmology.
We studied expected sensitivity of such searches at a future...
Zhen Liu
24/08/2015, 17:30
Supersymmetry Phenomenology and Experiment
Supersymmetry searches at the LHC are both highly varied and highly constraining, but the vast majority are focused on cases where the final-stage visible decays are prompt. Scenarios featuring superparticles with detector-scale lifetimes have therefore remained a tantalizing possibility for sub-TeV SUSY, since explicit limits are relatively sparse. Nonetheless, the extremely low backgrounds...
Prof.
Howard Baer
(University of Oklahoma)
25/08/2015, 14:30
Supersymmetry Phenomenology and Experiment
ELectroweak naturalness requires a SUSY mu parameter ~100-200 GeV
while mHu^2 is driven radiatively to small negative values.
A small mu parameter can be easily generated from large m_3/2 via
radiative breakdown of Peccei-Quinn symmetry.
Highly mixed top squarks may exist in the few TeV range at little cost to naturalness.
Imposing naturalness in both the EW and QCD sectors leads to...
Kurt Brendlinger
(University of Pennsylvania (US))
25/08/2015, 14:50
Supersymmetry Phenomenology and Experiment
The search for the supersymmetric partners of the Standard Model quarks and gluons is one of the priorities of the ATLAS experiment
in the quest for Beyond the Standard Model signals. Recent results in the channel with two electrons or muons, jets and missing transverse
momentum are presented. The results are obtained using 20/fb of proton-proton collisions recorded by the ATLAS...
Antonios Agapitos
(National and Kapodistrian University of Athens (GR))
25/08/2015, 15:10
Supersymmetry Phenomenology and Experiment
A search for supersymmetry in events with one or two soft leptons and large missing transverse momentum is presented, based on 19.7 fb^-1 of 8 TeV pp collisions recorded with the CMS detector. This final state is typical for SUSY scenarios with a small mass splitting between the LSP and the top squark or chargino (compressed mass spectra). A hard Initial State Radiation jet is used to trigger...
Jan-Frederik Schulte
(Rheinisch-Westfaelische Tech. Hoch. (DE))
25/08/2015, 15:30
Supersymmetry Phenomenology and Experiment
The results of searches for SUSY production at CMS in events with dilepton final states are presented using up to 20/fb of data from the 8 TeV LHC run of 2012. These include final states with Z bosons decaying to lepton pairs as well as non-resonant same- and opposite-sign lepton pairs. The results are interpreted in the context of several different SUSY model scenarios.
Dr
Po-Yan Tseng
(Department of Physics, National Tsing Hua University)
25/08/2015, 16:30
Supersymmetry Phenomenology and Experiment
We perform global fits to
the most recent data (after summer 2014)
on Higgs boson signal strengths
in the framework of the minimal supersymmetric standard model
(MSSM). The heavy supersymmetric (SUSY) particles such as squarks
enter into the loop factors of the $Hgg$
and $H\gamma\gamma$ vertices while other SUSY
particles such as sleptons and charginos also enter into...
James Michael Keaveney
(Vrije Universiteit Brussel (VUB) - Interuniversitary Institute for high energies (IIHE) (BE))
25/08/2015, 16:50
Supersymmetry Phenomenology and Experiment
Many theories beyond the Standard Model predict the existence of colored scalar states,
known as sgluons. Sgluons are expected to be copiously pair-produced
at the LHC via strong interactions. In scenarios where they are top-philic, such as SUSY
with Dirac gauginos, sgluons can be sought in multitop events at the LHC. We revisit two LHC Run I analyses
that utilise events with either the...
Jonathan Da Silva
(University of Manchester)
25/08/2015, 17:10
Supersymmetry Phenomenology and Experiment
The U(1) extended supersymmetric standard model (UMSSM) can accommodate a Higgs boson at 125 GeV without relying on large corrections from the top/stop sector. After imposing LHC results on the Higgs sector, on B-physics and on new particle searches as well as dark matter constraints, we show that this model offers two viable dark matter candidates, the right-handed (RH) sneutrino or the...
Joshua Berger
(SLAC)
25/08/2015, 17:30
Supersymmetry Phenomenology and Experiment
We study the phenomenology of models that contain resonances yielding final states with leptons and jets. Recent searches for a first-generation leptoquark by the CMS collaboration have shown around 2.5 sigma deviations from Standard Model predictions in both the eejj and e nu jj channels. Furthermore, the eejj invariant mass distribution has another 2.8 sigma excess from the CMS right-handed...
Yuto Minami
(University of Tokyo (JP))
27/08/2015, 14:00
Supersymmetry Phenomenology and Experiment
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 promptly decaying supersymmetric squarks and gluinos in events containing jets, missing transverse momentum with and without light leptons. The results presented utilise 20/fb of 8 TeV...
Chaowaroj Wanotayaroj
(University of Oregon (US))
27/08/2015, 14:20
Supersymmetry Phenomenology and Experiment
The results of supersymmetric searches at the LHC are typically presented in the context of simplified models, with a single specific production channel
and decay mode for the supersymmetric particles. In full SUSY models, several production and decay channels are expected, and the limits
on supersymmetric particle masses might be weaker. In this talk, results from the searches...
Florent Sylvain Lacroix
(University of California Riverside (US))
27/08/2015, 14:40
Supersymmetry Phenomenology and Experiment
We present results of searches for gluino and squark production with the CMS detector in final states containing jets, missing transverse momentum, and possibly leptons. The results are based on 20 fb-1 of data collected during the 8 TeV LHC run. Various discriminants based on event kinematics are employed to suppress standard-model backgrounds. The results are interpreted in the context of...
Samuel Louis Bein
(Florida State University (US))
27/08/2015, 15:00
Supersymmetry Phenomenology and Experiment
We interpret CMS new physics search results within the context of SUSY models, such as natural simplified models and the phenomenological MSSM (pMSSM), a generic 19-dimensional parametrization of the MSSM at the SUSY scale that captures most of the MSSM's phenomenological features. Searches in various final state topologies are included, and up to 20 fb-1 of data from the 8TeV LHC run are...
Cristian Ignacio Pena Herrera
(California Institute of Technology (US))
27/08/2015, 15:20
Supersymmetry Phenomenology and Experiment
We present results of searches for SUSY production at CMS in events with one or two isolated photons, possibly coming from a Higgs decay, using up to 20/fb of data from the 8 TeV LHC run of 2012. The results are interpreted in the context of several different SUSY models, in particular gauge-mediation models, with the gravitino as the lightest supersymmetric particle.
Ms
Ursula Laa
(LPSC Grenoble)
27/08/2015, 16:30
Supersymmetry Phenomenology and Experiment
A mostly right-handed sneutrino as the lightest supersymmetric particle (LSP) is an interesting dark matter candidate, leading to LHC signatures which can be quite distinct from those of the conventional neutralino LSP. Using SModelSv1.0.1 for testing the model against the limits published by ATLAS and CMS in the context of so-called Simplified Model Spectra (SMS), we investigate to what...
Christopher Bock
(Ludwig-Maximilians-Univ. Muenchen (DE))
27/08/2015, 16:50
Supersymmetry Phenomenology and Experiment
Many supersymmetry models feature gauginos and also sleptons with masses less than a few hundred GeV. These can give rise to observables direct pair production rates at the LHC. The talk presents results from searches for gaugino and slepton pair production in final states with leptons, using 20/fb of 8 TeV pp collision data collected by the ATLAS detector at the LHC, with an emphasis on...
Sho Maruyama
(Fermi National Accelerator Lab. (US))
27/08/2015, 17:10
Supersymmetry Phenomenology and Experiment
Results for SUSY searches in the electroweak sector are summarized, based on ~20 fb-1 of 8 TeV proton-proton collisions collected by the CMS detector. A variety of complementary final state signatures and methods are used to probe gaugino and slepton production. This talk includes the latest results from the first ever search for SUSY production through vector boson fusion processes in a...
Giovanni Grilli di Cortona
(SISSA)
27/08/2015, 17:30
Supersymmetry Phenomenology and Experiment
We analyse the mass reach for electroweakinos at future hadron colliders and their interplay with direct detection experiments. Motivated by the LHC data, we focus on split supersymmetry models with different electroweakino spectra. We find for example that a 100 TeV collider may explore Winos up to $\sim 7$ TeV in low scale gauge mediation models or thermal Wino dark matter around $3$ TeV in...
Anders Kvellestad
(University of Oslo)
28/08/2015, 14:00
Supersymmetry Phenomenology and Experiment
Collider searches for supersymmetric models with R-parity violation (RPV) generally focus on the decay of the (effectively) lightest supersymmetric particle (LSP) through RPV operators. The signal then depends both on the nature of the LSP and the relevant RPV operators. Here we identify scenarios where RPV decays of charginos are important, either because the R-parity conserving decay modes...
Emma Torro Pastor
(University of Washington (US))
28/08/2015, 14:20
Supersymmetry Phenomenology and Experiment
The violation of R-parity allows new signatures to be pursued in the search for supersymmetry at the LHC. This talk presents the latest results from the ATLAS experiment using 20/fb of pp LHC collision data of searches for R-parity violating SUSY scenarios with lepton number violation. The results presented are for dedicated searches for resonances, as well as a systematic analysis of the...
Brett David Jackson
(University of Pennsylvania (US))
28/08/2015, 14:40
Supersymmetry Phenomenology and Experiment
The violation of R-parity allows new signatures to be pursued in the search for supersymmetry at the LHC. This talk presents the latest results from the ATLAS experiment using 20/fb of pp LHC collision data of searches for R-parity violating SUSY scenarios with baryon number violation. The searches look for an excess of events with high jet multiplicities or resonances in fully hadronic final...
Christopher West
(Univ. of California Santa Barbara (US))
28/08/2015, 15:00
Supersymmetry Phenomenology and Experiment
The latest results from searches for R-parity violating supersymmetry with the CMS detector will be reviewed. We present results using up to 20 fb-1 of data from the 8 TeV LHC run. Interpretations of the experimental results in terms of production of squarks, gluinos, charginos, neutralinos, and sleptons within R-parity violating SUSY models are presented.
Seng Pei Liew
(University of Tokyo)
28/08/2015, 16:30
Supersymmetry Phenomenology and Experiment
Recent Supersymmetry (SUSY) collider search results have reported intriguing excesses at the 8 TeV run of the LHC. An excess of statistical significance 2.6 sigma in the invariant mass distribution of the opposite-sign same-flavor (OSSF) lepton pair has been found by the CMS collaboration (off-Z excess). Similar final state, albeit with different distribution of invariant mass, has been...
Myeonghun Park
(Asia Pacific Center for Theoretical Physics (APCTP) (KR))
28/08/2015, 16:50
Supersymmetry Phenomenology and Experiment
In this talk I will explain how we can enhance sensitivities for the degenerated SUSY mass spectra, especially for a natural supersymmetric framework.
Arne-Rasmus Drager
(Hamburg University (DE))
28/08/2015, 17:10
Supersymmetry Phenomenology and Experiment
Searches for supersymmetric models with a compressed mass spectrum are presented using data samples corresponding to integrated luminosities of about 19.7 fbโ1, collected at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. Compressed mass spectra, where multiple SUSY particles are nearly degenerate in mass, present a unique challenge to SUSY searches at the LHC. Such spectra...
Debtosh Chowdhury
(INFN, Roma)
28/08/2015, 17:30
Supersymmetry Phenomenology and Experiment
A degenerate supersymmetric sparticle spectrum can escape constraints from flavor physics and at the same time evading the limits from the direct searches if the degeneracy extends to the gaugino sector. Inspired by this, we consider a scenario where all the soft terms have approximately a common mass scale at $M_{\text{SUSY}}$ while allowing for splittings within $\mathcal{O}(10\%)$. As a...
