P. Albicocco
A5059417991- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Superconducting Materials and Applications
- Astrophysics and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- Advanced Data Storage Technologies
- Low-power high-performance VLSI design
- Numerical Methods and Algorithms
- International Science and Diplomacy
- Parallel Computing and Optimization Techniques
- Radiation Therapy and Dosimetry
- Digital Filter Design and Implementation
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015-2025
Universitat Ramon Llull
2023-2024
Brandeis University
2022-2024
University of Victoria
2019-2024
A. Alikhanyan National Laboratory
2024
SR Research (Canada)
2024
Federación Española de Enfermedades Raras
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2017-2023
Istituto Nazionale di Fisica Nucleare
2022-2023
A narrow pentaquark state, P_{c}(4312)^{+}, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in data sample Λ_{b}^{0}→J/ψpK^{-} decays, which an order magnitude larger than that previously analyzed by the LHCb Collaboration. The P_{c}(4450)^{+} structure formerly reported confirmed and observed consist two overlapping peaks, P_{c}(4440)^{+} P_{c}(4457)^{+}, where this two-peak interpretation 5.4σ. proximity Σ_{c}^{+}D[over ¯]^{0} ¯]^{*0} thresholds peaks suggests they...
A measurement of the ratio branching fractions decays B^{+}→K^{+}μ^{+}μ^{-} and B^{+}→K^{+}e^{+}e^{-} is presented. The proton-proton collision data used correspond to an integrated luminosity 5.0 fb^{-1} recorded with LHCb experiment at center-of-mass energies 7, 8, 13 TeV. For dilepton mass-squared range 1.1<q^{2}<6.0 GeV^{2}/c^{4} measured be R_{K}=0.846_{-0.054}^{+0.060}_{-0.014}^{+0.016}, where first uncertainty statistical second systematic. This most precise R_{K} date compatible...
The observation of Higgs boson production in association with a top quark pair ($t\bar{t}H$), based on the analysis proton-proton collision data at centre-of-mass energy 13 TeV recorded ATLAS detector Large Hadron Collider, is presented. Using corresponding to integrated luminosities up 79.8 fb$^{-1}$, and considering decays into $b\bar{b}$, $WW^*$, $\tau\tau$, $\gamma\gamma$, $ZZ^*$, observed significance 5.8 standard deviations, compared an expectation 4.9 deviations. Combined $t\bar{t}H$...
Jet energy scale measurements and their systematic uncertainties are reported for jets measured with the ATLAS detector using proton-proton collision data a center-of-mass of s=13 TeV, corresponding to an integrated luminosity 3.2 fb−1 collected during 2015 at LHC. Jets reconstructed from deposits forming topological clusters calorimeter cells, anti-kt algorithm radius parameter R=0.4. calibrated series simulation-based corrections in situ techniques. In techniques exploit transverse...
A search is conducted for new resonant and non-resonant high-mass phenomena in dielectron dimuon final states. The uses 36.1 fb−1 of proton-proton collision data, collected at $$ \sqrt{s}=13 TeV by the ATLAS experiment LHC 2015 2016. No significant deviation from Standard Model prediction observed. Upper limits 95% credibility level are set on cross-section times branching ratio resonances decaying into dileptons, which converted to lower resonance mass, up 4.1 E6-motivated Z ′ . Lower qqℓℓ...
Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The uses proton-proton collision data corresponding to integrated luminosity 36.1 fb−1 at centre-of-mass energy 13 TeV collected 2015 2016 the ATLAS detector Large Hadron Collider. Events required have least one above 250 GeV no leptons (e or μ). Several signal regions considered increasing requirements on GeV. Good agreement is observed between number events...
The performance of the missing transverse momentum (E$_{T}^{miss}$) reconstruction with ATLAS detector is evaluated using data collected in proton-proton collisions at LHC a center-of-mass energy 13 TeV 2015. To reconstruct E$_{T}^{miss}$, fully calibrated electrons, muons, photons, hadronically decaying $\tau$-leptons, and jets reconstructed from calorimeter deposits charged-particle tracks are used. These combined soft hadronic activity measured by not associated hard objects. Possible...
A search for the decay of Standard Model Higgs boson into a $b\bar{b}$ pair when produced in association with $W$ or $Z$ is performed ATLAS detector. The data, corresponding to an integrated luminosity 79.8 $\mathrm{fb}^{-1}$ were collected proton-proton collisions during Run 2 Large Hadron Collider at centre-of-mass energy 13 TeV. For mass 125 GeV, excess events over expected background from other processes found observed (expected) significance 4.9 (4.3) standard deviations. combination...
The LHCb Upgrade II will fully exploit the flavour-physics opportunities of HL-LHC, and study additional physics topics that take advantage forward acceptance spectrometer. I begin operation in 2020. Consolidation occur, modest enhancements detector be installed, Long Shutdown 3 LHC (2025) these are discussed here. main installed long shutdown 4 (2030) build on strengths current experiment I. It operate at a luminosity up to $ 2 \times 10^{34} \rm cm^{-2}s^{-1}$, ten times detector. New...
An angular analysis of the $B^{0}\rightarrow K^{*0}(\to K^{+}\pi^{-})\mu^{+}\mu^{-}$ decay is presented using a data set corresponding to an integrated luminosity 4.7 fb$^{-1}$ $pp$ collision collected with LHCb experiment. The full $C\!P$-averaged observables are determined in bins invariant mass squared dimuon system. Contamination from decays $K^{+}\pi^{-}$ system S-wave configuration taken into account. tension seen between previous results and Standard Model predictions persists new...
Abstract The standard model of particle physics 1–4 describes the known fundamental particles and forces that make up our Universe, with exception gravity. One central features is a field permeates all space interacts 5–9 . quantum excitation this field, as Higgs manifests itself boson, only no spin. In 2012, properties consistent boson was observed by ATLAS CMS experiments at Large Hadron Collider CERN 10,11 Since then, more than 30 times many bosons have been recorded experiment, enabling...
A search for charge-parity (CP) violation in D^{0}→K^{-}K^{+} and D^{0}→π^{-}π^{+} decays is reported, using pp collision data corresponding to an integrated luminosity of 5.9 fb^{-1} collected at a center-of-mass energy 13 TeV with the LHCb detector. The flavor charm meson inferred from charge pion D^{*}(2010)^{+}→D^{0}π^{+} or muon B[over ¯]→D^{0}μ^{-}ν[over ¯]_{μ}X decays. difference between CP asymmetries measured be ΔA_{CP}=[-18.2±3.2(stat)±0.9(syst)]×10^{-4} π-tagged...
A search for heavy neutral Higgs bosons and Z′ is performed using a data sample corresponding to an integrated luminosity of 36.1 fb−1 from proton-proton collisions at $$ \sqrt{s}=13 TeV recorded by the ATLAS detector LHC during 2015 2016. The resonance assumed decay τ +τ − with least one tau lepton decaying final states hadrons neutrino. in mass range 0.2-2.25 0.2-4.0 bosons. are good agreement background predicted Standard Model. results interpreted benchmark scenarios. In context hMSSM...
Properties of the Higgs boson are measured in two-photon final state using 36.1 fb$^{-1}$ proton-proton collision data recorded at $\sqrt{s} = 13$ TeV by ATLAS experiment Large Hadron Collider. Cross-section measurements for production a through gluon-gluon fusion, vector-boson and association with vector bosonor top-quark pair reported. The signal strength, defined as ratio observed to expected yield, is each these processes well inclusively. global strength measurement $0.99 \pm 0.14$...
Dijet events are studied in the proton--proton collision dataset recorded at $\sqrt{s}=$13 TeV with ATLAS detector Large Hadron Collider 2015 and 2016, corresponding to integrated luminosities of 3.5 fb$^{-1}$ 33.5 respectively. Invariant mass angular distributions compared background predictions no significant deviation is observed. For resonance searches, a new method for fitting component invariant distribution employed. The then used set upper limits 95% confidence level on range physics...
Searches are performed for both promptlike and long-lived dark photons, A^{'}, produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look A^{'}→μ^{+}μ^{-} decays using data sample corresponding to an integrated luminosity 5.5 fb^{-1} collected with the LHCb detector. Neither search finds evidence signal, 90% confidence-level exclusion limits placed on γ-A^{'} kinetic mixing strength. The A^{'} explores mass region from near dimuon threshold up 70 GeV...
Algorithms used for the reconstruction and identification of electrons in central region ATLAS detector at Large Hadron Collider (LHC) are presented this paper; these algorithms physics analyses that involve final state which based on 2015 2016 proton–proton collision data produced by LHC $$\sqrt{s}$$ = 13 $$\text {TeV}$$ . The performance electron reconstruction, identification, isolation, charge is evaluated simulated samples using from $$Z \rightarrow ee$$ $$J/\psi decays. Typical...
A study of the decays $B^0_s \to \mu^+\mu^-$ and $B^0 has been performed using 26.3 fb$^{-1}$ 13 TeV LHC proton-proton collision data collected with ATLAS detector in 2015 2016. Since resolution $\mu^+\mu^-$ invariant mass is comparable to $B_{s}^{0}$-$B^0$ difference, a single fit determines signal yields for both decay modes. This results measurement branching fraction ${\cal B}(B^0_s \mu^+\mu^-) = \left( 3.2^{+1.1}_{-1.0} \right) \times 10^{-9}$ an upper limit B}(B^0 < 4.3 10^{-10}$ at...
A search for the supersymmetric partners of quarks and gluons (squarks gluinos) in final states containing hadronic jets missing transverse momentum, but no electrons or muons, is presented. The data used this were recorded 2015 2016 by ATLAS experiment $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ proton-proton collisions at Large Hadron Collider, corresponding to an integrated luminosity $36.1\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. results are interpreted context various models where squarks...
A search for the electroweak production of charginos, neutralinos and sleptons decaying into final states involving two or three electrons muons is presented. The analysis based on 36.1 fb -1 s=13 TeV proton-proton collisions recorded by ATLAS detector at Large Hadron Collider. Several scenarios simplified models are considered. These include associated next-to-lightest neutralino lightest chargino, followed their decays with leptons via either Standard Model gauge bosons; direct chargino...
A bstract An angular analysis of the decay B d 0 → K ∗ μ + − is presented, based on proton-proton collision data recorded by ATLAS experiment at LHC. The study using 20.3 fb −1 integrated luminosity collected during 2012 centre-of-mass energy $$ \sqrt{s}=8 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>8</mml:mn></mml:math> TeV. Measurements * longitudinal polarisation fraction and a set parameters obtained for this...
A search for doubly charged Higgs bosons with pairs of prompt, isolated, highly energetic leptons the same electric charge is presented. The uses a proton–proton collision data sample at centre-of-mass energy 13 TeV corresponding to 36.1 $$\text {fb}^{-1}$$ integrated luminosity recorded in 2015 and 2016 by ATLAS detector LHC. This analysis focuses on decays $$H^{\pm \pm }\rightarrow e^{\pm }e^{\pm }$$ , }\mu ^{\pm \mu fitting dilepton mass spectra several exclusive signal regions. No...
Abstract The ATLAS experiment at the Large Hadron Collider has a broad physics programme ranging from precision measurements to direct searches for new particles and interactions, requiring ever larger more accurate datasets of simulated Monte Carlo events. Detector simulation with Geant4 is but requires significant CPU resources. Over past decade, developed utilized tools that replace most CPU-intensive component simulation—the calorimeter shower simulation—with faster methods. Here,...
The first simultaneous test of muon-electron universality using B^{+}→K^{+}ℓ^{+}ℓ^{-} and B^{0}→K^{*0}ℓ^{+}ℓ^{-} decays is performed, in two ranges the dilepton invariant-mass squared, q^{2}. analysis uses beauty mesons produced proton-proton collisions collected with LHCb detector between 2011 2018, corresponding to an integrated luminosity 9 fb^{-1}. Each four lepton measurements reported either given q^{2} interval or supersedes previous measurements. results are compatible predictions...
A simultaneous analysis of the B+→K+ℓ+ℓ− and B0→K*0ℓ+ℓ− decays is performed to test muon-electron universality in two ranges square dilepton invariant mass, q2. The measurement uses a sample beauty meson produced proton-proton collisions collected with LHCb detector between 2011 2018, corresponding an integrated luminosity 9 fb−1. sequence multivariate selections strict particle identification requirements produce higher signal purity better statistical sensitivity per unit than previous...