P. Andreola
A5092499087- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Stochastic processes and statistical mechanics
- Radio Astronomy Observations and Technology
- Advanced Data Storage Technologies
- Geophysics and Gravity Measurements
- Radiation Detection and Scintillator Technologies
- Electron and X-Ray Spectroscopy Techniques
- Probability and Statistical Research
- Nuclear Physics and Applications
- Radioactive Decay and Measurement Techniques
University of Zurich
2023-2025
Universitat Ramon Llull
2023-2024
A measurement of time-dependent <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> violation in the decays <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>B</c:mi><c:mn>0</c:mn></c:msup></c:math> and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:msup><e:mover accent="true"><e:mi>B</e:mi><e:mo stretchy="false">¯</e:mo></e:mover><e:mn>0</e:mn></e:msup></e:math> mesons to...
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...
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>...
A bstract An angular analysis of the $$ {B}_s^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> → ϕe + e − decay is performed using proton-proton collision dataset collected between 2011 and 2018 by LHCb experiment, corresponding to an integrated luminosity 9 fb 1 at centre-of-mass energies 7, 8 13 TeV. The in very low dielectron invariant mass-squared region 0 . 0009 2615 GeV 2 /c 4...
The decay-time-dependent <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> asymmetry in <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msubsup><c:mi>B</c:mi><c:mi>s</c:mi><c:mn>0</c:mn></c:msubsup><c:mo stretchy="false">→</c:mo><c:mi>J</c:mi><c:mo>/</c:mo><c:mi>ψ</c:mi><c:mo stretchy="false">(</c:mo><c:mo...
The LHCb Collaboration measures production of the exotic hadron <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>χ</a:mi><a:mrow><a:mi>c</a:mi><a:mn>1</a:mn></a:mrow></a:msub><a:mo stretchy="false">(</a:mo><a:mn>3872</a:mn><a:mo stretchy="false">)</a:mo></a:math> in proton-nucleus collisions for first time. Comparison with charmonium state <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>ψ</e:mi><e:mrow><e:mo...
The fraction of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>χ</a:mi><a:mrow><a:mi>c</a:mi><a:mn>1</a:mn></a:mrow></a:msub></a:math> and <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>χ</c:mi><c:mrow><c:mi>c</c:mi><c:mn>2</c:mn></c:mrow></c:msub></c:math> decays in the prompt <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mi>J</e:mi><e:mo>/</e:mo><e:mi>ψ</e:mi></e:math> yield, <g:math...
A bstract The production cross-section of J/ψ pairs in proton-proton collisions at a centre-of-mass energy $$ \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 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...
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...
A search for hidden-charm pentaquark states decaying to a range of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msub><a:mrow><a:mi mathvariant="normal">Σ</a:mi></a:mrow><a:mrow><a:mi>c</a:mi></a:mrow></a:msub><a:mover accent="true"><a:mrow><a:mi>D</a:mi></a:mrow><a:mrow><a:mo stretchy="false">¯</a:mo></a:mrow></a:mover></a:mrow></a:math> and <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"><f:mrow><f:msubsup><f:mrow><f:mi...
The production of prompt <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi>D</a:mi><a:mi>s</a:mi><a:mo>+</a:mo></a:msubsup></a:math> and <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>D</c:mi><c:mo>+</c:mo></c:msup></c:math> mesons is measured by the LHCb experiment in proton-lead (<e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mrow><e:mi>p</e:mi><e:mi>Pb</e:mi></e:mrow></e:math>) collisions...
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...
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.
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 $$ {B}_s^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> {D}_s^{+}{D}_s^{-} <mml:mi>D</mml:mi> <mml:mo>+</mml:mo> <mml:mo>−</mml:mo> decays, using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy 13 TeV corresponding to an integrated...
Abstract A search for the very rare $$B^{*0}\rightarrow \mu ^+\mu ^-$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mmultiscripts> <mml:mi>B</mml:mi> <mml:mrow/> <mml:mo>∗</mml:mo> <mml:mn>0</mml:mn> </mml:mrow> </mml:mmultiscripts> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>μ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>-</mml:mo> </mml:math> and $$B_{s}^{*0}\rightarrow <mml:mi>s</mml:mi> decays is conducted by analysing $$B_c^+\rightarrow \pi <mml:msubsup>...
The first observation of the $\Xi_b^0 \to J/\psi \Xi^- \pi^+$ decay and most precise measurement branching fraction $\Lambda_b^0 K^+$ are reported, using proton-proton collision data from LHCb experiment collected in 2016--2018 at a centre-of-mass energy 13~TeV, corresponding to an integrated luminosity 5.4~fb$^{-1}$. Using \Lambda$ \Xi^-$ decays as normalisation channels, ratios fractions measured be: \[ \frac{\mathcal{B}(\Lambda_b^0 K^+)}{\mathcal{B}(\Lambda_b^0 \Lambda)} = (1.17 \pm 0.14...