Searches for Supersymmetry through the direct production of Higgsinos decaying into final states with leptons and b-jets are presented. The two analyses are performed performed using 139fb-1 of the 13 TeV pp collision data collected with the ATLAS detector. The data-driven and Monte Carlo based methods used to estimated the Standard Model and detector backgrounds are discussed, as well as the...
A combination of Higgs boson pair production and single Higgs production is performed using up to 139/fb of proton-proton collision data recorded with the ATLAS detector at a center-of-mass energy of sqrt(s) = 13 TeV at the LHC. The combination includes the bbbb, bbtautau and bbyy decay channels from the Higgs boson pair production and the ZZ to 4l, WW, yy, tt, bb, VH, bb (boosted), bb (VBF)...
A measurement of off-shell Higgs boson production in the ZZ → 4l and ZZ → 2l2ν decay channels, where l stands for either an electron or a muon, is performed using proton-proton collisions data at a center of mass energy of √s=13 TeV at LHC collected by the ATLAS experiment. An observed (expected) upper limit on the off-shell Higgs signal strength, defined as the event yield normalized to the...
Null four-vectors of General Relativity (GR), suggest mathematical developments. Two of them are presented. It is reminded that in GR a privileged frame exists, which is the frame in whch time elapses the most. It is showned that a particle generates locally a space-time deformation, which transforms this privileged frame according to the boost associated with its velocity in this frame. From...
The electron reconstruction, identification and isolation efficiencies measurements using 13 TeV pp collision data collected with the ATLAS detector during the LHC Run-2 is discussed. The poster covers also the fake/non-prompt lepton background sources and estimation methods in some selected ATLAS searches with multiple leptons.
The IceCube neutrino observatory measures the diffuse flux of high-energy astrophysical neutrinos by means of various techniques, and there exists a mild tension between spectra obtained in different analyses. The spectrum derived from reconstruction of muon tracks is harder than that from cascades, dominated by electron and tau neutrinos. If confirmed, this tension may provide a clue to the...
We systematically calculate the mass-spectra of tetraquarks [$cc\bar{b}\bar{b}$] and [$bb\bar{c}\bar{c}$] in a non-relativistic diquark-antidiquark model. The spin-dependent terms have been incorporated to describe the splitting structure for orbital and radial excitations. We have successfully obtained the experimentally observed $B_{c}^{\pm} $ mesons to fit the model’s parameters which are...
In this work we check the range of values which quark condensate can take, basing on our method: processing of experimental data on $e^+e^-$-annihilation into even number of pions (BaBar, CMD-2, OLYA) by constructing the Adler function in two ways (through dispersion representation and through the OPE series), applying the Borel transform, compiling the sum rule, and extracting of...
The microCosmics telescope is a low cost education cosmic ray detector that can be operated within the classroom or school laboratory. The microCosmics telescope consists of 3 scintillator detectors and a data acquisition system based on a digital PC based oscilloscope.
In this work we present the performance of the telescope using data collected from 4 different telescopes with similar...
The instantaneous luminosity of the Large Hadron Collider at CERN will be increased by about a factor of five with respect to the design value by undergoing an extensive upgrade program overthe coming decade. The largest phase-1 upgrade project for the ATLAS Muon System was
the replacement of the first station in the forward regions with the New Small Wheels (NSWs) which took place during...
A search for supersymmetry (SUSY) through the production of electroweak gauginos in final states with two leptons with the same-sign electric charge or at least three leptons is presented. The analysed dataset corresponds to 139 fb-1 of proton-proton collision data collected at centre-of-mass energy of 13 TeV with the ATLAS detector at LHC. No significant excess over the Standard Model (SM)...
A search for resonances in events with at least one isolated charged lepton (electron or muon) is performed using 139 fb^-1 of sqrt(s)=13 TeV proton-proton collision data recorded by the ATLAS detector at the LHC. Deviations from Standard Model predictions are tested in three- and four-body invariant mass distributions constructed from jets and leptons. The study reports first...
A search for heavy resonances Y decaying into a Standard Model Higgs boson (H) and a new boson (X) is performed with proton-proton collision data with the ATLAS detector at the CERN Large Hadron Collider. The physics channel where the Higgs decays into bb and the X to light quarks is considered, thus resulting in a fully hadronic final state. A two-dimensional phase space of Y mass versus X...
A search is made for a vector-like $T$ quark decaying into a Higgs boson and a top quark in 13 TeV proton-proton collisions using the ATLAS detector at the Large Hadron Collider with a data sample corresponding to an integrated luminosity of 139 fb$^{-1}$.
The all-hadronic decay modes $H \rightarrow b\bar{b}$ and $t \rightarrow bW \rightarrow bq\bar{q}'$ are reconstructed as large-radius jets...
The approximate solution of the Schrodinger equation in D-Dimensions for Extended Trigonometric Scarf potential was investigated using the Nikiforove-Uvarov (N-U) method. The method used to solve the Schrodinger equation for a charged particle at a center and noncentral potential have been developed using the Asymptotic Iteration Method, Dirac equation, and Klein-Gordon equation. This method...
Masses of triply charm-bottom baryons are calculated using the hypercentral Constituent Quark Model (hCQM) [1], a basic non-relativistic framework. Constituent Quark Models (CQMs) are widely used to describe the interaction of quarks inside the baryon. Hence, it is preferable to perform within a general framework like hCQM to understand internal quark dynamics. The hCQM is based on the idea of...
We present studies on the sensitivity in measuring anomalous quartic gauge boson couplings using single and multi parametric models in the Effective Field Theory framework. The studies are performed on the diboson ZZ production channel in pp colission at the LHC energies, where Z bosons decay to electron positron pairs or muon+ muon-pairs.
The investigation of the strange particle production in heavy-ion collisions is one of the ways to study quark-gluon plasma. One of the most striking observations is the increase of the ratio of (multi)strange hadron yields to non-strange hadrons yields for increasing charged-particle multiplicity in small collision systems. In this contribution, recent results on the Xi and Omega...
Decoherence in quantum computing can be
reduced by using quantum gates with operation time shorter
than the coherence time of the system. Ultrafast single-qubit
gates have been demonstrated on various physical systems
but still remains slow for some cases with respect to subcycle
timescales where the operation time is shorter than the
characteristic timescale of the system, determined by...
In this study, we investigate the effects of introducing a chemical potential in the expansion of early universe Quark Gluon Plasma (QGP). We use a quasi-particle approach in which we consider a temperature dependent quark-mass. We then proceed to solve the Friedman equation to obtain the equation of state of energy density and temperature, the graphs of which are shown in the results section....
Directed flow of particles is an important feature seen in heavy-ion collisions and is a sensitive probe of the equation of state (EoS) of the matter produced in the collisions. Model calculations have also predicted that directed flow could be a sensitive probe of the softening of EOS associated with a first order phase transition. Directed flow of protons and anti-protons are of particular...
String theory is the prime candidate for the quantum gravity. However, so far, the principle and symmetry that lead to string theory remain unknown. In this paper, we propose holographic principle as the fundamental principle and symmetry. We find that it is possible to derive string action, quantum physics, and general relativity from holographic principle. We introduce the concept of...
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