Conveners
Beyond the Standard Model: 1
- Bruce Mellado Garcia (University of the Witwatersrand)
- Seema Sharma (Indian Institute of Science Education and Research (IN))
Beyond the Standard Model: 2
- Bruce Mellado Garcia (University of the Witwatersrand)
- Seema Sharma (Indian Institute of Science Education and Research (IN))
Beyond the Standard Model: 3
- Kiwoon Choi (KAIST)
Beyond the Standard Model: 4
- JiJi Fan (Brown University)
Beyond the Standard Model: 5
- JiJi Fan (Brown University)
Beyond the Standard Model: 6
- Seema Sharma (Indian Institute of Science Education and Research (IN))
- Bruce Mellado Garcia (University of the Witwatersrand)
Beyond the Standard Model: 7
- Seema Sharma (Indian Institute of Science Education and Research (IN))
- Bruce Mellado Garcia (University of the Witwatersrand)
Beyond the Standard Model: 8
- Kiwoon Choi (KAIST)
Beyond the Standard Model: 9
- Seema Sharma (Indian Institute of Science Education and Research (IN))
- Bruce Mellado Garcia (University of the Witwatersrand)
Beyond the Standard Model: 10
- Bruce Mellado Garcia (University of the Witwatersrand)
- Seema Sharma (Indian Institute of Science Education and Research (IN))
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 2.2 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...
Results are reported from a search for supersymmetric particles in pp collisions in the final state with a single, high pT lepton; multiple jets, including at least one btagged jet; and large missing transverse momentum. The data sample corresponds to 2.1 fb-1 recorded by the CMS experiment at ps = 13 TeV. The search focuses on processes leading to high jet multiplicities, such as gluino pair...
We present a search for new physics in events with one or two low-momentum leptons and missing transverse energy, based on the first proton-proton integrated luminosity recorded with the CMS detector at 13 TeV. The final state can be the phenomenology of SUSY models foreseeing a small mass splitting between the lightest supersymmetric particle and e.g. the top squark or chargino, in the so...
Searches for the direct electroweak production of supersymmetric charginos and neutralinos in topologies containing leptons and W, Z, and Higgs bosons are presented.
A search for direct top squark pair production in the hadronic final state is presented. The data used are 2.3 fb-1 of pp collision data at 13 TeV taken with the CMS detector in 2015.
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 recent increase in the center of mass energy of the proton-proton collisions...
We present a search for supersymmetry in diphoton plus jets plus missing transverse energy final states. The analysis uses data collected with the CMS detector at a center-of-mass energy of 13 TeV.
The Belle II experiment aims to record 50 ab$^{-1}$ data with the high
luminosity to be provided by the SuperKEKB energy-asymmetric $e^+e^-$
collider. The anticipated high statistics data enables us to perform
studies of $B$ decays involving $\tau$ leptons such as
$B^+ \to \tau^+ \nu_{\tau}$ and $B \to D^{(*)} \tau^+ \nu_{\tau}$ modes.
The precise measurements of branching fraction as...
We study the dark matter particle, the dark photon (DP), in the decay of the Higgs-like boson. The nature of dark matter is maintained through the hidden sector including the effects of breaking of the scale invariance. The model is based on the additional $U^{\prime}(1)$ gauge group associated with light DP.
The interaction between DP and quarks is mediated by the derivative of the...
Searches in CMS for dark matter in final states with invisible particles recoiling against jets, top/bottom quarks, Ws, Zs, photons are presented. Various topologies are explored, covering several specific dark-matter production modes. The combination in a simplified-model framework of various searches for direct dark matter production with the CMS detector is discussed, highlighting...
Results of searches for both prompt and non-prompt leptonic decays of new
dark sector particles in proton-proton collisions with the ATLAS detector
at a center-of-mass energy of 13 TeV are presented. Searches that
encompass a wide range of new particle masses, lifetimes and degrees of
collimation of leptonic decay products are discussed. The results are
interpreted in the context of models...
Beyond the standard model theories like composite Higgs models predict resonances with large branching fractions in a Higgs boson and a vector boson with negligible branching fractions to light fermions. We present an overview of searches for new physics containing a Higgs boson and a W or Z boson in the final state, using proton-proton collision data collected with the CMS detector at the...
Many extensions to the Standard Model predicts new particles decaying
into two massive vector bosons (WW, WZ, ZZ making this a smoking gun
signature. Searches for such diboson resonances have been performed in
final states with different numbers of leptons and jets where new jet
substructure techniques to disentangle the hadronic decay products in
highly boosted configuration are being used. ...
Run 2 of the LHC offers unparallelled potential to discover new physics (NP).
As NP is often considered to couple to the strong force, jet based searches
provide exciting opportunities. The latest ATLAS and CMS search results in inclusive
and heavy-flavour high transverse momentum jet searches will be presented.
A search is conducted for both resonant, and non-resonant new phenomena in
the dilepton final state, using the ATLAS experimental data. Resonance
interpretations are given for a Z' or Graviton, while Contact Interactions
are considered for the non-resonant interpretation, with the dilepton
invariant mass used as the discrimination variable throughout. The full LHC
2015 proton-proton dataset is...
We present searches for vector-like quarks that only couple to light generation quarks, in LHC proton-proton collisions using the CMS experiment. Vector-like quarks are generally considered to mix significantly only with quarks of the third generation. However, cancellations among different vector-like quark contributions can relax constraints on mixing with lighter generations, leaving room...
New quarks appear in many beyond the Standard Model trying to cancel the
mass divergence for the Higgs boson. The current status of the ATLAS
searches for single production of such news quarks will be reviewed,
addressing the used analysis techniques, in particular the selection
criteria, the background modelling and the related experimental
uncertainties. The phenomenological implications of...
We present a search for new massive particles decaying to heavy-flavour quarks with the CMS detector at the LHC. Decay channels to vector-like top partner quarks, such as T', are also considered. This results in a top-pair-like final state, as the T' decays to a W boson and bottom quark; however the reconstructed mass of the T' can be used to further signal discrimination. We use proton-proton...
A search for new resonances that decay into top quark pairs and new
resonances that decay into a top quark and a b quark are reported. The
search is performed with the ATLAS experiment at the LHC using
proton-proton collision data collected at a centre-of-mass energy of
$\sqrt{s}=13$ TeV. Both the lepton plus jets channel in the top pair
search and the all hadronic channel are explored in...
Many models of physics beyond the standard model predict events that
contain two or more leptons with or without extra jets, missing energy,
accompanying b-quarks, etc. This talk highlights ATLAS searches targeting
new heavy neutrinos and leptons and multicharge Higgs-like particles in
multilepton final states with the first LHC Run2 Data.
Fermion compositeness would give rise to excited states of quarks and leptons. Such states would radiatively decay to standard-model fermions. This talk present searches for such decays, focusing on the recent results obtained using data collected at Run-II of the LHC.
Results of searches for long-lived particles that decay to either pairs of
hadronic jets or clusters of variously displaced hadronic vertices
(emerging jets) in proton-proton collisions with the ATLAS detector at a
center-of-mass energy of 13 TeV are presented. The results are interpreted
in the context of several models, including hidden valleys with high-mass
scalars, baryogenesis models,...
Numerous new physics models, e.g., theories with extra dimensions and various gauge-group extensions of the standard model, predict the existence of heavy resonances decaying to final states containing leptons. This talk presents searches for new physics in the dilepton, lepton+MET, and Z(ll)gamma final states at CMS, focusing on the recent results obtained using data collected during the...
Results of searches for particles with anomalously high or fractional
electric charge produced in proton-proton collisions in the ATLAS detector
at a center-of-mass energy of 13 TeV are presented. Such signatures,
encompassing particles with charges from 2 to 60 times the electron charge,
involve high levels of ionization in the ATLAS detector and can arise from
magnetic monopoles or models...
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...
