Publications de Aurelio Bay | EPFL Graph Search

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The first observation of the decay eta(c)(2S) -> p (p) over bar is reported using proton -proton collision data corresponding to an integrated luminosity of 3.0 fb(-1) recorded by the LHCb experiment at centre -of -mass energies of 7 and 8 TeV. The eta c(2 ...

The transverse polarization of

The difference in total widths between the B-c(+) and B+ mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb(-1) collected by the LHCb experiment in 7 and 8 TeV centre-of-mass energy proton-proton collisions at the LH ...

We present a measurement of the time-dependent CP-violating asymmetry in B-s(0) -> J/psi phi decays, using data collected with the LHCb detector at the LHC. The decay time distribution of B-s(0) -> J/psi phi is characterized by the decay widths Gamma(H) an ...

The study of a wide peaking structure in the Bc+γ mass spectrum is reported using a data sample of proton-proton collisions collected by the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb− 1 . The observed structure is consistent with the lowest excited P -wave Bc+ states and exhibits a statistical significance exceeding 7 standard deviations relative to the background-only hypothesis. A t

Searches for CP violation in the two-body decays D-(s)(+) -> h(+)pi(0) and D-(s)(+) -> h(+)eta (where h(+) denotes a pi(+) or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to either 9 fb(-1) or 6 fb(-1) of i ...

Angular correlations in B+ -> X(3872)K+ decays, with X(3872) -> rho(0)J/psi, rho(0) -> pi(+)pi(-) and J/psi -> pi(+)pi(-), are used to measure orbital angular momentum contributions and to determine the J(PC) value of the X(3872) meson. The data correspond ...

A search for the rare decays B-s(0) -> mu(+) mu(-) and B-s(0) -> mu(+) mu-is performed with data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples comprise 1.1 fb(-1) of proton-proton collisions at root s = ...

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay B-s(0) -> J/psi f(0)(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the B? sy ...

Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb(-1), the Xi(-)(b) and Omega(-)(b) baryons are reconstructed in the Xi(-)(b) -> J/psi Xi(-) and Omega(-)(b) -> J/psi Omega(-) decay modes and their lifetimes measured to ...

Using pp collisions corresponding to 3 fb integrated luminosity, recorded by the LHCb experiment at centre- of- mass energies of 7 and 8TeV, the ratio of branching fractions B (0b ! (2 S) ) =B (0b ! J= ) = 0 : 513 0 : 023 (stat) 0 : 016 (syst) 0 : 011 (B) ...

Dark photons are hypothetical massive vector particles that could mix with ordinary photons. The simplest theoretical model is fully characterised by only two parameters: the mass of the dark photon m(gamma)D and its mixing parameter with the photon, epsil ...

The lifetimes of the

{\varOmega}_c^0

and

{\Xi}_c^0

baryons are measured using a pp collision dataset collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb −1. The charm baryons are produced in the fully reconstructed decay chains

{\varOmega}_b^{-}\to {\varOmega}_c^0\left(\to p{K}^{-}{K}^{-}{\pi}^{+}\right){\pi}^{-}

and

{\Xi}_b^{-}\to {\Xi}_c^0\left(\to p{K}^{-}{K}^{-}{\pi}^{+}\right){\pi}^{-}

. The measurement uses topologically and kinematically similar B − → D

The Large Hadron Collider beauty experiment (LHCb) is a single-arm forward spectrometer dedicated to the study of B-meson decays in p - p collisions at the Large Hadron Collider (LHC). The LHCb detector has excellent tracking and particle identification ca ...

A measurement of the inclusive Z -> tau tau cross-section in p p collisions at root s = 7 TeV is presented based on a dataset of 1.0 fb(-1) collected by the LHCb detector. Candidates for Z -> tau tau decays are identified through reconstructed final states ...

The first measurements of the top- and antitop-quark differential production cross sections and the top-quark charge asymmetry in the forward region are presented, using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.4 fb^{-1}. The total production cross sections of top and antitop quarks are also determined. Measurements are performed using the μ+b-jet final state within a fiducial region defined by b-jet p_{

The decay B-0 -> DK*(0) and the charge conjugate mode are studied using 1.0 fb(-1) of pp collision data collected by the LHCb experiment at /s = 7 TeV in 2011. The CP asymmetry between the B-0 -> DK*(0) and the B-0 -> DK*(0) decay rates, with the neutral ...

Charged particle multiplicities are studied in proton-proton collisions in the forward region at a centre-of-mass energy of TeV with data collected by the LHCb detector. The forward spectrometer allows access to a kinematic range of in pseudorapidity, mome ...

We search for lepton-flavor-violating τ decays into a lepton (electron or muon) and an f0 (980) meson using 671 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No events are observed and we set the following 90% ...

The time-integrated CP asymmetry in the decay D-0 -> (KSKS0)-K-0 is measured using 3 fb(-1) of proton-proton collision data collected by the LHCb experiment at centreof- mass energies of 7 and 8TeV. The flavour of the D-0 meson is determined by use of the ...

Aurelio Bay

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Observation of eta(c)(2S) -> p(p)over-bar and search for X(3872) -> p(p)over-bar decays

Measurement of transverse $\mathrm{\Lambda}$ and $\overline{\mathrm{\Lambda}}$ hyperon polarization in $p\mathrm{Pb}$ collisions at $\sqrt{{s}_{\mathrm{NN}}}=5.02\text{ }\text{ }\mathrm{TeV}$

Measurement of the lifetime of the B-c(+) meson using the B-c(+) -> J/psi pi(+) decay mode

Measurement of the CP-Violating Phase phi(s) in the Decay B-s(0) -> J/psi phi

Study of Bc(1P)+ states in the Bc+γ mass spectrum

Search for CP violation in D-(s)(+) -> h(+) pi(0) and decays D-(s)(+) -> h(+) eta decays

Quantum numbers of the X(3872) state and orbital angular momentum in its rho(0)J/psi decay

First Evidence for the Decay B-s(0) -> mu(+) mu(-)

First observation of Bs0 -> J/psi f0(980) decays

Measurement of the Xi(-)(b) and Omega(-)(b) baryon lifetimes

Measurement of the ratio of branching fractions of the decays0(2S) and arrange Lambda

Sensitivity of the SHiP experiment to dark photons decaying to a pair of charged particles

Measurement of the $ {\varOmega}_c^0 $ and $ {\Xi}_c^0 $ baryon lifetimes using hadronic b-baryon decays

Performance of the LHCb Silicon Tracker in p-p Collisions at the LHC

A study of the Z production cross-section in pp collisions at root s=7 TeV using tau final states

Measurement of the Top-Quark Production Cross Section and Charge Asymmetry at LHCb

Measurement of CP observables in B-0 -> DK*(0) with D -> K+K-

Measurement of charged particle multiplicities and densities in pp collisions root s=7 TeV in the forward region

Search for lepton-flavor-violating τ decay into a lepton and an f0 (980) meson

Measurement of the time-integrated CP asymmetry in D-0 -> (KSKS0)-K-0 decays