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Lesya Shchutska

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Publications associées (301)

Search for the rare decays ${\mathbf W^{+} \rightarrow \mathbf D_s^{+} \gamma}$ and ${\mathbf Z \rightarrow \mathbf D^0 \gamma}$ at LHCb

Lesya Shchutska

A search for the rare decays and is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13, corresponding to an integrated luminosity of 2.0. No significant signal is observed for either decay mode an ...

2023

Model-independent measurement of charm mixing parameters in ̄B→D0ð→K0Sπ+ π−Þμ− ̄νμX decays

Lesya Shchutska

American Physical Society2023

Measurement of CP violation in B0→ψ(→ℓ+ℓ−)KS0(→π+π−)B0→ψ(→ℓ+ℓ−)KS0(→π+π−) decays

Lesya Shchutska

A measurement of time-dependent CP violation in the decays of B0 and B0 mesons to the final states J/ψ(→ μ+μ−)K0 S, ψ(2S) (→ μ+μ−)K0 S and J/ψ(→ e+e−)K0 S with K0 S → π+π− is presented. The data correspond to an integrated luminosity of 6 fb−1 collected at ...

2023

J/ψ and D0 production in √sNN=68.5 GeV PbNe collisions

Lesya Shchutska

The first measurement of J/ψ and D0 production in PbNe collisions by the LHCb experiment in its fixed-target configuration is reported. The production of J/ψ and D0 mesons is studied with a beam of lead ions with an energy of 2.5 TeV per nucleon colliding ...

2023

Measurement of the 171Tm beta spectrum

Alexey Boyarsky, Lesya Shchutska

The beta spectrum of the main transition of the 171Tm was measured using a double focalizing spectrometer. The instrument was lately improved in order to reduce its low energy threshold to 34 keV. We used the spectrometer to measure the energy end-point of ...

2023

Observation of a Resonant Structure near the Ds+Ds- Threshold in the B+→Ds+Ds-K+ Decay

Lesya Shchutska

An amplitude analysis of the B+→Ds+Ds-K+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-th ...

2023

Measurement of the Ratios of Branching Fractions R(D*) and R(D0)

Aurelio Bay, Tatsuya Nakada, Guido Haefeli, Olivier Schneider, Frédéric Blanc, Lesya Shchutska, Lino Ferreira Lopes, Surapat Ek-In, Vladimir Macko, Michel De Cian, Sebastian Schulte, Veronica Sølund Kirsebom, Carina Trippl, Sara Celani, Serhii Cholak, Elena Graverini, Maria Vieites Diaz, Ettore Zaffaroni, Donal Patrick Hill, Renato Quagliani, Elisabeth Maria Niel, Aravindhan Venkateswaran

The ratios of branching fractions R(D*) = B((B) over bar -> D* tau(-) (v) over bar (tau))/B((B) over bar -> D*.mu(-)(v) over bar mu) and R(D-0) = B(B- -> D(0)t-mu(-)(v) over bar mu) are measured, assuming isospin symmetry, using a sample of proton-proton c ...

Amer Physical Soc2023

Evidence for Modification of b Quark Hadronization in High-Multiplicity pp Collisions at √s=13 TeV

Tatsuya Nakada, Guido Haefeli, Olivier Schneider, Frédéric Blanc, Lesya Shchutska, Lino Ferreira Lopes, Surapat Ek-In, Vladimir Macko, Ana Bárbara Rodrigues Cavalcante, Michel De Cian, Sebastian Schulte, Veronica Sølund Kirsebom, Carina Trippl, Sara Celani, Serhii Cholak, Elena Graverini, Maria Vieites Diaz, Ettore Zaffaroni, Donal Patrick Hill, Renato Quagliani, Elisabeth Maria Niel, Aravindhan Venkateswaran

The production rate of B-s(0) mesons relative to B-0 mesons is measured by the LHCb experiment in pp collisions at a center-of-mass energy √s = 13 TeV over the forward rapidity interval 2 < y < 4.5 as a function of the charged particle multiplicity measure ...

Amer Physical Soc2023

Observation and branching fraction measurement of the decay Ξ−b→Λ0bπ−

Lesya Shchutska

The decay Ξ−b → Λ0bπ− is observed using a proton-proton collision data sample collected at center-of-ffiffimass energy √s = 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 5.5 fb-1. This process is mediated by the s → uu-d quark ...

American Physical Society2023

Search for the doubly heavy baryon Ξbc+Ξbc+ decaying to J/ψΞc+J/ψΞc+

Lesya Shchutska

A first search for the decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen ...

2023

Precision measurement of CP violation in the penguin-mediated decay B0s→ϕϕ

Lesya Shchutska

A flavor-tagged time-dependent angular analysis of the decay B0s→ϕϕ is performed using pp collision data collected by the LHCb experiment at s√=13 TeV, the center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb^{-1}. The CP-viol ...

2023

The Forward Physics Facility at the High-Luminosity LHC

Martin Bauer, Alexey Boyarsky, Enrico Bertuzzo, Lesya Shchutska, Wenjing Wu, Karan Kumar, Francesco Cerutti, Wei Liu, Patrick Foldenauer, Yi Zhang, Saurabh Nangia, Raffaele Tito D'Agnolo, Emanuele Copello, Ji Hyun Kim, Yiming Li, Zheng Wang, Jing Li

High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing LHC experiments. The proposed Forward Physics Facility (FPF), to be located s ...

2023

Charmonium production in pNe collisions at √sNN = 68.5 GeV

Lesya Shchutska

The measurement of charmonium states produced in proton-neon (pNe) collisions by the LHCb experiment in its fixed-target configuration is presented. The production of J/ψ and ψ(2S) mesons is studied with a beam of 2.5 TeV protons colliding on gaseous neon ...

2023

Observation of Cabibbo-suppressed two-body hadronic decays and precision mass measurement of the Ω0 c baryon

Lesya Shchutska

The first observation of the singly Cabibbo-suppressed Ω0 c → Ω−K+ and Ω0 c → Ξ−π+ decays is reported, using proton-proton collision data at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1, collected with the LHCb d ...

2023

Search for the baryon- and lepton-number violating decays B0→pμ- and Bs0→pμ-

Lesya Shchutska

A search for the baryon- and lepton-number violating decays B0→pμ- and Bs0→pμ- is performed at the LHCb experiment using data collected in proton-proton collisions at s=7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2, and 6 fb-1, respect ...

2023

Multidifferential study of identified charged hadron distributions in Z-tagged jets in proton-proton collisions at √s=13 TeV

Aurelio Bay, Tatsuya Nakada, Guido Haefeli, Olivier Schneider, Frédéric Blanc, Lesya Shchutska, Lino Ferreira Lopes, Surapat Ek-In, Vladimir Macko, Ana Bárbara Rodrigues Cavalcante, Michel De Cian, Sebastian Schulte, Veronica Sølund Kirsebom, Carina Trippl, Sara Celani, Serhii Cholak, Elena Graverini, Maria Vieites Diaz, Ettore Zaffaroni, Donal Patrick Hill, Renato Quagliani, Elisabeth Maria Niel, Aravindhan Venkateswaran

Jet fragmentation functions are measured for the first time in proton-proton collisions for charged pions, kaons, and protons within jets recoiling against a Z boson. The charged-hadron distributions are studied longitudinally and transversely to the jet d ...

American Physical Society2023

Amplitude analysis of the Ds+→ π−π+π+ decay

Lesya Shchutska

A Dalitz plot analysis of the Ds+ → π−π+π+ decay is presented. The analysis is based on proton-proton collision data recorded by the LHCb experiment at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 1.5 fb−1. The resonan ...

Springer Nature2023

Search for CP violation in the phase space of D0 → π−π+π0 decays with the energy test

Lesya Shchutska

A search for CP violation in D0 → π−π+π0 decays is reported, using pp collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6 fb−1. An unbinned model-independent approach provides sensitivity to loca ...

2023

Measurement of CP asymmetries in D(s)+ -> ηπ+ and D(s)+ -> η'π+ decays

Aurelio Bay, Tatsuya Nakada, Guido Haefeli, Olivier Schneider, Frédéric Blanc, Lesya Shchutska, Matthieu Philippe Luther Marinangeli, Lino Ferreira Lopes, Surapat Ek-In, Vladimir Macko, Ana Bárbara Rodrigues Cavalcante, Michel De Cian, Sebastian Schulte, Veronica Sølund Kirsebom, Carina Trippl, Sara Celani, Serhii Cholak, Elena Graverini, Maria Vieites Diaz, Ettore Zaffaroni, Donal Patrick Hill, Renato Quagliani, Elisabeth Maria Niel

Searches for CP violation in the decays D(s)+ -> ηπ+ and D(s)+ -> η'π+ are performed using pp collision data corresponding to 6 fb(-1) of integrated luminosity collected by the LHCb experiment. The calibration channels D(s)+ -> ηπ+ and D(s)+ -> ϕπ+ are use ...

Springer Nature2023

Observation of New Baryons in the Ξb-π+π- and Ξb0π+π- Systems

Lesya Shchutska

The first observation and study of two new baryonic structures in the final state Ξ0bπ+π− and the confirmation of the Ξb(6100)− state in the Ξ−bπ+π− decay mode are reported using proton-proton collision data collected by the LHCb experiment, corresponding ...

College Pk2023

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