Alessia Anelli
A5061190092- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Stochastic processes and statistical mechanics
- Nuclear Physics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Probability and Statistical Research
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Advanced Data Storage Technologies
- Crystallography and Radiation Phenomena
- Particle Accelerators and Free-Electron Lasers
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2024-2025
University of Milano-Bicocca
2024-2025
European Organization for Nuclear Research
2025
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2024
Polytechnic University of Bari
2022
The production rate of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi mathvariant="normal">Λ</a:mi><a:mi>b</a:mi><a:mn>0</a:mn></a:msubsup></a:math> baryons relative to <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:msup><d:mi>B</d:mi><d:mn>0</d:mn></d:msup></d:math> mesons in <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mi>p</f:mi><f:mi>p</f:mi></f:math> collisions at a center-of-mass energy...
The <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> asymmetry and branching fraction of the Cabibbo-Kobayashi-Maskawa-suppressed decay <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>B</c:mi><c:mo>+</c:mo></c:msup><c:mo stretchy="false">→</c:mo><c:mrow><c:mi>J</c:mi><c:mo>/</c:mo><c:mi>ψ</c:mi></c:mrow><c:msup><c:mi>π</c:mi><c:mo>+</c:mo></c:msup></c:math> are precisely measured relative to...
A study of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi mathvariant="normal">Λ</a:mi><a:mi>b</a:mi><a:mn>0</a:mn></a:msubsup></a:math> and <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:msubsup><d:mi mathvariant="normal">Ξ</d:mi><d:mi>b</d:mi><d:mn>0</d:mn></d:msubsup></d:math> decays to <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:mrow><g:mi...
A measurement of the time-dependent ratio <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>D</a:mi><a:mn>0</a:mn></a:msup><a:mo stretchy="false">→</a:mo><a:mrow><a:msup><a:mi>K</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>π</a:mi><a:mo>−</a:mo></a:msup></a:mrow></a:math> to <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:mrow><d:mrow><d:msup><d:mrow><d:mover accent="true"><d:mrow><d:mi>D</d:mi></d:mrow><d:mrow><d:mo...
Abstract Charged-particle trajectories are usually reconstructed with the LHCb detector using combined information from tracking devices placed upstream and downstream of 4 T m dipole magnet. Trajectories only tracker magnet, which referred to as tracks, have not been used for physics analysis date. The challenges reconstruction long-lived particles tracks use discussed solutions proposed. feasibility performance studied samples $$\varvec{\Lambda }$$ <mml:math...
A bstract The first full amplitude analysis of B + → ψ (2 S ) K π − decays is performed using proton-proton collision data corresponding to an integrated luminosity 9 fb −1 recorded with the LHCb detector. rich spectrum studied and branching fractions resonant substructure associated prominent 1 (1270) contribution are measured. cannot be described by conventional strange charmonium resonances only. An model 53 components developed comprising 11 hidden-charm exotic hadrons. New production...
The first study of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi><a:mi>ϕ</a:mi></a:math> production in diffractive processes proton-proton collisions is presented. based on an LHCb dataset recorded at center-of-mass energy 13 TeV, corresponding to integrated luminosity <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>5</c:mn><c:mtext> </c:mtext><c:mtext>...
The Ξ_{b}^{0(-)}→Ξ_{c}(3055)^{+(0)}(→D^{+(0)}Λ)π^{-} decay chains are observed, and the spin-parity of Ξ_{c}(3055)^{+(0)} baryons is determined for first time. measurement performed using proton-proton collision data at a center-of-mass energy sqrt[s]=13 TeV, corresponding to an integrated luminosity 5.4 fb^{-1}, recorded by LHCb experiment between 2016 2018. be 3/2^{+} with significance more than 6.5σ (3.5σ) compared all other tested hypotheses. up-down asymmetries...
A bstract An angular analysis of the $$ {B}_s^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> → ϕe + e − decay is performed using proton-proton collision dataset collected between 2011 and 2018 by LHCb experiment, corresponding to an integrated luminosity 9 fb 1 at centre-of-mass energies 7, 8 13 TeV. The in very low dielectron invariant mass-squared region 0 . 0009 2615 GeV 2 /c 4...
An amplitude analysis of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>B</a:mi></a:mrow><a:mrow><a:mo>−</a:mo></a:mrow></a:msup><a:mo...
Lepton flavor universality in rare <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>b</a:mi><a:mo stretchy="false">→</a:mo><a:mi>s</a:mi></a:math> transitions is tested for the first time using <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:msubsup><d:mi>B</d:mi><d:mi>s</d:mi><d:mn>0</d:mn></d:msubsup></d:math> meson decays. The measurements are performed <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"...
A search for <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>D</a:mi><a:mn>0</a:mn></a:msup></a:math> meson decays to the <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>π</c:mi><c:mo>+</c:mo></c:msup><c:msup><c:mi>π</c:mi><c:mo>−</c:mo></c:msup><c:msup><c:mi>e</c:mi><c:mo>+</c:mo></c:msup><c:msup><c:mi>e</c:mi><c:mo>−</c:mo></c:msup></c:math> and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
An amplitude analysis of the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>B</a:mi></a:mrow><a:mrow><a:mn>0</a:mn></a:mrow></a:msup><a:mo stretchy="false">→</a:mo><a:msup><a:mrow><a:mi>K</a:mi></a:mrow><a:mrow><a:mo>*</a:mo><a:mn>0</a:mn></a:mrow></a:msup><a:msup><a:mrow><a:mi>μ</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:msup><a:mrow><a:mi>μ</a:mi></a:mrow><a:mrow><a:mo>−</a:mo></a:mrow></a:msup></a:mrow></a:math> decay is...
The LHCb Collaboration measures production of the exotic hadron <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>χ</a:mi><a:mrow><a:mi>c</a:mi><a:mn>1</a:mn></a:mrow></a:msub><a:mo stretchy="false">(</a:mo><a:mn>3872</a:mn><a:mo stretchy="false">)</a:mo></a:math> in proton-nucleus collisions for first time. Comparison with charmonium state <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>ψ</e:mi><e:mrow><e:mo...
A study of resonant structures in <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>B</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:mo...
The fraction of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>χ</a:mi><a:mrow><a:mi>c</a:mi><a:mn>1</a:mn></a:mrow></a:msub></a:math> and <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>χ</c:mi><c:mrow><c:mi>c</c:mi><c:mn>2</c:mn></c:mrow></c:msub></c:math> decays in the prompt <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>J</e:mi><e:mo>/</e:mo><e:mi>ψ</e:mi></e:math> yield, <g:math...
A bstract The production cross-section of J/ψ pairs in proton-proton collisions at a centre-of-mass energy $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 TeV is measured using data sample corresponding to an integrated luminosity 4 . 2 fb − 1 collected by the LHCb experiment. measurement performed with both mesons transverse momentum range 0 < p T 14 GeV/ c and rapidity y 5. this process be 16 36 ± 28...
A bstract comprehensive study of the local and nonlocal amplitudes contributing to decay B 0 → K *0 (→ + π − ) μ is performed by analysing phase-space distribution products. The analysis based on pp collision data corresponding an integrated luminosity 8.4 fb 1 collected LHCb experiment. This measurement employs for first time a model both one-particle two-particle amplitudes, utilises complete dimuon mass spectrum without any veto regions around narrow charmonium resonances. In this way it...
An amplitude analysis of the B0→K*0μ+μ− decay is presented. The based on data collected by LHCb experiment from proton-proton collisions at s=7, 8 and 13 TeV, corresponding to an integrated luminosity 4.7 fb−1. For first time, Wilson coefficients nonlocal hadronic contributions are accessed directly unbinned data, where latter parametrized as a function q2 with polynomial expansion. parameters determined under two alternative hypotheses: relies experimental information alone, while second...
For accurate determination of particle masses knowledge the momentum scale detectors is crucial. The procedure used to calibrate LHCb spectrometer described and illustrated using performance obtained with an integrated luminosity $1.6~ fb^{-1}$ collected during 2016 in $pp$ running. uses large samples $J/\psi \rightarrow \mu^+ \mu^-$ $B^+ J/\psi K^+$ decays leads a relative accuracy $3 \times 10^{-4}$ on scale.
A comprehensive study of the angular distributions in bottom-baryon decays Λ_{b}^{0}→Λ_{c}^{+}h^{-}(h=π,K), followed by Λ_{c}^{+}→Λh^{+} with Λ→pπ^{-} or Λ_{c}^{+}→pK_{S}^{0} decays, is performed using a data sample proton-proton collisions corresponding to an integrated luminosity 9 fb^{-1} collected LHCb experiment at center-of-mass energies 7, 8, and 13 TeV. The decay parameters associated charge-parity (CP) asymmetries are measured, no significant CP violation observed. For first time,...
A measurement of time-dependent CP violation in D^{0}→π^{+}π^{-}π^{0} decays using a pp collision data sample collected by the LHCb experiment 2012 and from 2015 to 2018, corresponding an integrated luminosity 7.7 fb^{-1}, is presented. The initial flavor each D^{0} candidate determined charge pion produced D^{*}(2010)^{+}→D^{0}π^{+} decay. decay D^{0}→K^{-}π^{+}π^{0} used as control channel validate procedure. gradient asymmetry ΔY measured be ΔY=(-1.3±6.3±2.4)×10^{-4}, where first...
A bstract : The radiative decays χ c1 (3872) → ψ(2S) γ and J/ψγ are used to probe the nature of state using proton-proton collision data collected with LHCb detector, corresponding an integrated luminosity 9 fb − 1 . Using B + (3872)K decay, process is observed for first time ratio its partial width that decay measured be $$ \frac{\Gamma_{\chi_{c1}(3872)\to \uppsi \left(2\textrm{S}\right)\gamma }}{\Gamma_{\chi_{c1}(3872)\to \textrm{J}/\uppsi \gamma }}=1.67\pm 0.21\pm 0.12\pm 0.04, <mml:math...
Measurements are presented of the cross-section for central exclusive production J/\psi\to\mu^+\mu^- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>J</mml:mi><mml:mi>/</mml:mi><mml:mi>ψ</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math> and \psi(2S)\to\mu^+\mu^- display="inline"><mml:mrow><mml:mi>ψ</mml:mi><mml:mo stretchy="false"...
A bstract time-dependent, flavour-tagged measurement of CP violation is performed with B 0 → D + − and $$ {B}_s^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> {D}_s^{+}{D}_s^{-} <mml:mi>D</mml:mi> <mml:mo>+</mml:mo> <mml:mo>−</mml:mo> decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy 13 TeV corresponding to an integrated...