Conveners
Experimental and Collider Aspects of SUSY
- Zachary Louis Marshall (Lawrence Berkeley National Lab. (US))
Experimental and Collider Aspects of SUSY
- Geraldine Conti (CERN)
Experimental and Collider Aspects of SUSY
- Martin John White (University of Adelaide (AU))
Experimental and Collider Aspects of SUSY
- Genevieve Belanger (Laboratoire d'Annecy-le-Vieux de Physique Théorique)
Experimental and Collider Aspects of SUSY
- Paul Douglas Jackson (University of Adelaide)
Experimental and Collider Aspects of SUSY
- Monoranjan Guchait (Tata Institute of Fundamental research(TIFR))
An inclusive search for supersymmetric processes that produce
final states with jets and missing transverse momentum is
performed in pp collisions at a centre-of-mass energy of 13
TeV. A dimensionless kinematic variable, aT, is used to
discriminate between events with genuine and
misreconstructed missing transverse momentum. A data
sample corresponding to an integrated luminosity of 2.3...
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, and no leptons. The results presented are based on the data recorded at 13...
We present a search for supersymmetry in hadronic final
states with transverse momentum imbalance as measured by
the MT2 variable. Results are based on 2.3 fb-1 of 13 TeV
proton-proton collisions collected with the CMS detector . The
results are interpreted as limits on the masses of potential new
colored particles in a variety of simplified models of
supersymmetry, significantly improving...
R-parity violation introduces new signatures to be considered in the search for supersymmetry at the LHC. Strongly interacting resonances may decay to jets, sleptons may decay via lepton-flavour violating processes and lightest supersymmetric particles may decay into many particles with or without missing transverse momentum. The talk presents recent results from searches of supersymmetry in...
Baryon number violation (BNV) features in a number of physics beyond the Standard Model and is experimentally well motivated as it is one of the conditions for baryogenesis. In this talk, experimental results which are sensitive to BNV will be discussed in the context of R-parity violating supersymmetric scenarios with non-zero BNV couplings and a simplified sparticle mass spectrum. Focus is...
The so-called high-luminosity upgrade of the LHC will impose new technological challenges to the ATLAS detector, requiring the partial upgrade of the detector. Scenarios of SUSY sparticle production, among others, have been used as benchmark to drive the design of the component upgrades, and to evaluate the sensitivity of the upgraded accelerator and detector. This talk will give an overview...
The decay of pair produced sparticles to the lightest supersymmetric particle via intermediate supersymmetric particles can yield final states with two opposite sign electrons or muons, jets, and missing transverse momentum. The searches performed by the ATLAS collaboration on this final state are reported, using data recorded at 13 TeV centre of mass energy. This includes two related...
A search for supersymmetry is performed using events with
two or more isolated leptons and jets in the final state using
the CMS detector. Results are based on a sample of protonproton
collisions at a centre-of-mass energy of 13 TeV at the
LHC corresponding to an integrated luminosity of 2.3 fb-1.
Constraints are set on the gluino and sbottom pair production
cross section; model independent...
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, and either one or two same sign light leptons. The results presented are...
Results of searches for supersymmetry in events with a single, isolated electron or muon are presented. The data set
comprises proton-proton collisions at a centre-of-mass energy
of 13 TeV, recorded by the CMS experiment. The results are
interpreted in models of strong production of supersymmetric
particles, with decay chains yielding third-generation or light
quarks, a lepton, and missing...
Many supersymmetry models feature gauginos and also sleptons with masses less than a few hundred GeV. These can give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. The talk presents recent searches results obtained by the ATLAS collaboration, including interpretations of the run 1 searches in a reduced sector of parameter...
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...
We present the latest SUSY search results using the razor
kinematic variables in CMS. An inclusive strategy is adopted
using multijet events with zero or one lepton, categorized in
the number jets and b-tags, which is sensitive to a wide
variety of SUSY scenarios. Results are interpreted in terms of
limits of gluino pair production decaying to stops, sbottoms,
and squarks, as well as squark...
Naturalness arguments favour supersymmetric particle spectra with the partners of the Higgs boson, top and bottom quarks, and gluons within the reach of the LHC. Searches for gluinos decaying to the lightest supersymmetric particle via real or virtual third generation squarks are thus well motivated. This talk present searches performed by the ATLAS collaboration with such final states, using...
We present results from the search for third generation
squarks (stops and bottoms) in pp collisions at 13 TeV with the
CMS detector.
Naturalness arguments favour supersymmetric particle spectra with relatively light partners of the top and bottom quarks. Top or bottom squarks with masses less than a few hundred GeV can give rise to direct pair production rates in proton-proton collisions at the LHC that can be observed with the ATLAS detector. The talk presents recent ATLAS results from searches for direct stop and sbottom...
A search for new physics is performed based on multijet
events with large missing transverse momentum produced in
13 TeV proton-proton collisions. The data sample,
corresponding to an integrated luminosity of 2.3 fb-1, was
collected with the CMS detector at Run 2 of the CERN LHC. The
data are examined in search regions of jet multiplicity,
bottom-quark jet multiplicity, missing transverse...
The Recursive Jigsaw reconstruction technique provides a powerful way to tackle challenging SUSY final states with multiple missing particles. By altering the input "decay tree" we demonstrate a new approach to considering compressed SUSY signatures from a variety of different sources. The imposition of this decay tree provides a clear way to define which objects are associated with an ISR...
The results of searches for new physics in final states with
photons and missing transverse energy are reported. The
searches are based on samples of proton-proton collisions
collected with the CMS detector, both at 8 and at 13 TeV. The
results are interpreted in models of supersymmetry with
gauge-mediated SUSY breaking, covering both strong
production (13 TeV results) and electroweak...
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.
We study a class of realizations of the Next-to-Minimal Supersymmetric Standard
Model that is motivated by dark matter and Higgs data, and in which the lightest
pseudoscalar Higgs boson mass is smaller than twice the bottom quark mass and
greater than twice the tau lepton mass. In such scenarios, the lightest
pseudoscalar Higgs boson can be copiously produced at the LHC from the decay...
Several supersymmetric models predict the production of massive long-lived supersymmetric particles. Such particles, if charged, may be detected through abnormal specific energy loss or long time-of-flight to the calorimeters. The talk presents recent results from searches of long-lived supersymmetric charged particles using proton-proton collisions at a centre of mass energy of 13 TeV with...
Light top squarks (stops) and light higgsinos are the key features of natural supersymmetry (SUSY), where the higgsinos are nearly degenerate and act as the missing transverse energy (ET) at the LHC. Besides the pair production via strong interaction, the stop can be produced via the electroweak interaction. The determination of the electroweak properties of the stop is an essential task for...
Natural SUSY with light, nearly mass-degenerate Higgsinos is a theoretically well motivated scenario which would in general escape LHC searches. An
electron-positron collider would provide a clean environment where the Higgsinos would be either discovered or excluded. We present a detailed study of
precision measurements of Higgsinos at the proposed International Linear Collider with...
Multidimensional scans of the pMSSM have been used in ATLAS to assess the experiment sensitivity to classess of models usually not well represented by simplified models. Such scans require a well defined approach in generating signal events and deciding which ones should be passed through the CPU-intensive detector simulation and for which ones the sensitivity can be instead parametrised. They...
With the flood of data from particle and astrophysics experiments increasing all the time, it is harder than ever to test beyond Standard Model (BSM) physics theories in a comprehensive and rigorous manner. I will present a new tool for performing global fits of generic new physics models using a very wide range of particle and astrophysics measurements. Results from studies of supersymmetric...
New physics scenarios for the LHC are often characterized by Simplified Models,
where the decay of a given particle is represented by an operator involving a minimal
number of fields. Such decay operators can be generalized beyond the
standard cases to describe a wide variety of final state multiplicities. This approach,
which we dub the n-body extension of Simplified Models, provides a...
Semi-invisible production at the Large Hadron Collider are often theoretically essential or experimentally convenient signatures originated from a large class of physics models beyond the standard model. Be it light neutrino or some heavy exotic dark matter, observing absence being the signature of their presence, and any study looking into these neutral, stable missing particles remains...
We study a simplified scenario in the next-to-minimal supersymmetry standard model where the electroweak sector has a split spectrum with light singlino and higgsinos and the lightest neutralino $\tilde{\chi}_1^0$ is singlino-dominated. Serving as a dark matter candidate, $\tilde{\chi}_1^0$ should have either resonant annihilation effects or sizable higgsino components to satisfy the observed...
The phenomenological Minimal Supersymmetric Standard Model (pMSSM) is investigated in the light of constraining experimental and observational data from precision measurements, astrophysics, direct supersymmetry searches at the LHC and measurements of the properties of the Higgs boson by means of a global fit using the program Fittino. Emphasis is set on a precise description of the limits...
In R-parity conserving SUSY models one anticipates searching for signal events where multiple missing neutral particles are present in a final state. Typical collider signatures for such events leverage large missing transverse momentum and high values of inclusive quantities such as the effective mass. In addition, specific features of distributions can be targeted with variables that...
