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Aurelio Bay

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Observation of Exotic J/ψφ Resonant Structure in Diffractive Processes in Proton-Proton Collisions

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Renato Quagliani, Aravindhan Venkateswaran, Luis Miguel Garcia Martin

The first study of J/ψφ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb-1. The data disfavor ...

2025

Measurement of exclusive J/ψ and ψ(2S) production at ps = 13 TeV

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

Measurements are presented of the cross-section for the central exclusive production of J/ψ → µ+µ− and ψ(2S) → µ+µ− processes in proton-proton collisions at ps = 13 TeV with 2016–2018 data. They are performed by requiring both muons to be in the LHCb accep ...

2025

Study of Ds1(2460)+→Ds+π+π- in B→D¯(*)Ds+π+π- decays

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

An amplitude analysis of the Ds1(2460)+→Ds+π+π- transition is performed simultaneously in B0→D-Ds+π+π-, B+→D¯0Ds+π+π-, and B0→D*-Ds+π+π- decays. The study is based on a data sample of proton-proton collisions recorded with the LHCb detector at centre-of-ma ...

2025

Measurement of D0- D ¯ 0 mixing and search for CP violation with D0 →k+π- decays

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

A measurement of the time-dependent ratio of the D0→K+π- to D¯0→K+π- decay rates is reported. The analysis uses a sample of proton-proton collisions corresponding to an integrated luminosity of 6 fb-1 recorded by the LHCb experiment from 2015 through 2018 ...

American Physical Society2025

Search for D0 meson decays to π + π − e + e − and K+K− e + e − final states

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

A search for D 0 meson decays to the π + π − e + e − and K + K − e + e − final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of ...

American Physical Society (APS)2025

Observation of the decay $ {B}_s^0\to {K}^0p\overline{p} $ and measurement of the $ {B}_{(s)}^0\to {K}^0p\overline{p} $ branching fractions

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

A study of the charmless baryonic decays

{B}_{(s)}^0\to {K}^0p\overline{p}

is presented, where

{B}_{(s)}^0

denotes either a B 0 or a

{B}_s^0

meson. The analysis is based on proton-proton collision data collected by the LHCb experiment at centre ...

Springer Science and Business Media LLC2025

Measurement of cp Asymmetries in Λb0 → ph- Decays

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Vitalii Lisovskyi, Ettore Zaffaroni

A search for CP violation in Lambda(0)(b) -> pK(-) and Lambda(0)(b) -> p pi(-) decays is presented using the full Run 1 and Run 2 data samples of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb(-1) at cente ...

AMER PHYSICAL SOC2025

Long-lived particle reconstruction downstream of the LHCb magnet

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

Charged-particle trajectories are usually reconstructed with the LHCb detector using combined information from the tracking devices placed upstream and downstream of the 4 T m dipole magnet. Trajectories reconstructed using only information from the tracke ...

2025

Measurement of the branching fraction ratio RK at large dilepton invariant mass

Aurelio Bay, Frédéric Blanc

A test of lepton universality between muons and electrons is performed using B + → K + ℓ + ℓ − decays (where ℓ = e, μ), in the dilepton invariant-mass-squared region above 14.3 GeV2 /c 4. The data used for the measurement consists of beauty meson decays pr ...

Springer Science and Business Media LLC2025

First Evidence for Direct CP Violation in Beauty to Charmonium Decays

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

The CP asymmetry and branching fraction of the Cabibbo-Kobayashi-Maskawa-suppressed decay B+→J/ψπ+ are precisely measured relative to the favored decay B+→J/ψK+ using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.4 ...

2025

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Observation of the decay $ {B}_s^0\to {K}^0p\overline{p} $ and measurement of the $ {B}_{(s)}^0\to {K}^0p\overline{p} $ branching fractions

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Elena Graverini, Aravindhan Venkateswaran, Luis Miguel Garcia Martin, Vitalii Lisovskyi

A study of the charmless baryonic decays

{B}_{(s)}^0\to {K}^0p\overline{p}

is presented, where

{B}_{(s)}^0

denotes either a B 0 or a

{B}_s^0

meson. The analysis is based on proton-proton collision data collected by the LHCb experiment at centre ...

Springer Science and Business Media LLC2025