A5106448341- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Radioactive Decay and Measurement Techniques
- Superconducting Materials and Applications
AGH University of Krakow
2021-2025
Jagiellonian University
2024-2025
Abstract Conventional, hadronic matter consists of baryons and mesons made three quarks a quark–antiquark pair, respectively 1,2 . Here, we report the observation state containing four in Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, $$\overline{{{{{u}}}}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mrow> <mml:mi>u</mml:mi> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> $$\overline{{{{{d}}}}}$$...
Quantum chromodynamics, the theory of strong force, describes interactions coloured quarks and gluons formation hadronic matter. Conventional matter consists baryons mesons made three quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported narrow state in D
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 An angular analysis of the $$ {B}_s^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>s</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> → ϕe + e − decay is performed using proton-proton collision dataset collected between 2011 and 2018 by LHCb experiment, corresponding to an integrated luminosity 9 fb 1 at centre-of-mass energies 7, 8 13 TeV. The in very low dielectron invariant mass-squared region 0 . 0009 2615 GeV 2 /c 4...
An angular analysis of the rare decay $B^0_s\rightarrow\phi\mu^+\mu^-$ is presented, using proton-proton collision data collected by LHCb experiment at centre-of-mass energies $7$, $8$ and $13~\rm{TeV}$, corresponding to an integrated luminosity $8.4~\rm{fb}^{-1}$. The observables describing distributions are determined in regions $q^2$, square dimuon invariant mass. results consistent with Standard Model predictions.
A bstract time-dependent, flavour-tagged measurement of CP violation is performed with B 0 → D + − and $$ {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 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...
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...
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...
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"...
Two narrow resonant states are observed in the Λ_{b}^{0}K^{-}π^{+} mass spectrum using a data sample of proton-proton collisions at center-of-mass energy 13 TeV, collected by LHCb experiment and corresponding to an integrated luminosity 6 fb^{-1}. The minimal quark content system indicates that these excited Ξ_{b}^{0} baryons. masses Ξ_{b}(6327)^{0} Ξ_{b}(6333)^{0} m[Ξ_{b}(6327)^{0}]=6327.28_{-0.21}^{+0.23}±0.12±0.24 m[Ξ_{b}(6333)^{0}]=6332.69_{-0.18}^{+0.17}±0.03±0.22 MeV, respectively,...
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 search for the doubly charmed baryon $\it{\Xi}_{cc}^{+}$ is performed in $\it{\Xi}_{c}^{+} \pi^{-} \pi^{+}$ invariant-mass spectrum, where $\it{\Xi}_{c}^{+}$ reconstructed $p K^{-} final state. The study uses proton-proton collision data collected with LHCb detector at a centre-of-mass energy of 13$\mathrm{\,Te\kern -0.1em V}$, corresponding to total integrated luminosity 5.4$\,\mathrm{fb}^{-1}$. No significant signal observed range 3.4$-$3.8$\mathrm{\,Ge\kern V}/c^2$. Upper limits are set...
A bstract data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb − 1 is used measure eleven CP violation observables in B ± → Dh decays, where h either a kaon or pion. The neutral D meson decay reconstructed three-body final states: K π ∓ 0 ; + and suppressed combination. mode large asymmetry expected, [ ] , observed significance greater than seven standard deviations. ratio partial width this relative that favoured mode, R ADS( ) = (1 . 27 16 02) × 10...
The identification of charm jets is achieved at LHCb for data collected in 2015-2018 using a method based on the properties displaced vertices reconstructed and matched with jets. performance this determined dijet calibration dataset recorded by detector selected such that are unbiased quantities used tagging algorithm. charm-tagging efficiency reported as function transverse momentum jet. measured efficiencies compared to those obtained from simulation found be good agreement.
A search for violation of the charge-parity (<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>) symmetry in <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:mo stretchy="false">→</c:mo><c:msup><c:mi>K</c:mi><c:mo>−</c:mo></c:msup><c:msup><c:mi>K</c:mi><c:mo>+</c:mo></c:msup><c:msup><c:mi>π</c:mi><c:mo>+</c:mo></c:msup></c:math> decay is presented, with proton-proton...