G. Barrand

activity

20112023

most citedMeasurement of the mass difference between neutral charm-meson eigenstates

68 citations · 228 across the 14 of their papers we have counts for

collaborators

14 papers

physics.gen-ph2023

Symmetric Lorentz-Minkowski, Antisymmetric Dirac-Majorana

Guy Barrand

We show a nice symmetric/antisymmetric relation between the four vector Lorentz transformation and the Dirac spinor one in the Majorana representation. From the spinor one, we exhi…

hep-ex2019★ 41 cited

Measurement of $B^{+}$ , $B^{0}$ and $Λ_{b}^{0}$ production in $p Pb$ collisions at $s_{NN} = 8.16 TeV$

LHCb Collaboration, R. Aaij, C. Abellán Beteta +842

The production of $B^{+}$ , $B^{0}$ and $Λ_{b}^{0}$ hadrons is studied in proton-lead collisions at a centre-of-mass energy per nucleon pair of $s_{NN} = 8.16 TeV$ record…

hep-ex2019★ 21 cited

Measurement of the $C P$ -violating phase $ϕ_{s}$ from $B_{s}^{0} \to J / ψ π^{+} π^{-}$ decays in 13 TeV $pp$ collisions

LHCb Collaboration, R. Aaij, C. Abellán Beteta +844

Decays of $B_{s}^{0}$ and $B_{s}^{0}$ mesons into $J / ψ π^{+} π^{-}$ final states are studied in a data sample corresponding to 1.9 fb $^{- 1}$ of integrated luminosity collect…

hep-ex2019★ 68 cited

Measurement of the mass difference between neutral charm-meson eigenstates

LHCb Collaboration, R. Aaij, C. Abellán Beteta +842

We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use $2.3 \times 1 0^{6}$ $…

hep-ex2019★ 20 cited

Amplitude analysis of $B_{s}^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays

LHCb Collaboration, R. Aaij, C. Abellán Beteta +843

The first untagged decay-time-integrated amplitude analysis of $B_{s}^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays is performed using a sample corresponding to $3.0$ …

hep-ex2019★ 17 cited

Dalitz plot analysis of the $D^{+} \to K^{-} K^{+} K^{+}$ decay

LHCb Collaboration, R. Aaij, B. Adeva +98

The resonant structure of the doubly Cabibbo-suppressed decay $D^{+} \to K^{-} K^{+} K^{+}$ is studied for the first time. The measurement is based on a sample of pp-collision data, collecte…

hep-ex2019★ 2 cited

Observation of the doubly Cabibbo-suppressed decay $Ξ_{c}^{+} \to pϕ$

LHCb collaboration, R. Aaij, C. Abellán Beteta +848

The doubly Cabibbo-suppressed decay $Ξ_{c}^{+} \to pϕ$ with $ϕ \to K^{+} K^{-}$ is observed for the first time, with a statistical significance of more than fifteen standard deviation…

hep-ex2018★ 9 cited

Measurement of the branching fraction and $C P$ asymmetry in $B^{+} \to J / ψ ρ^{+}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +844

The branching fraction and direct $C P$ asymmetry of the decay $B^{+} \to J / ψ ρ^{+}$ are measured using proton-proton collision data collected with the LHCb detector at cent…

hep-ex2018★ 8 cited

Study of the $B^{0} \to ρ (770)^{0} K^{*} (892)^{0}$ decay with an amplitude analysis of $B^{0} \to (π^{+} π^{-}) (K^{+} π^{-})$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +840

An amplitude analysis of $B^{0} \to (π^{+} π^{-}) (K^{+} π^{-})$ decays is performed in the two-body invariant mass regions $300 < m (π^{+} π^{-}) < 1100$ MeV/ $c^{2}$ , accounting for the $ρ^{0}$ , $ω$ ,…

hep-ex2018★ 18 cited

Search for the rare decay $B^{+} \to μ^{+} μ^{-} μ^{+} ν_{μ}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +844

A search for the rare leptonic decay $B^{+} \to μ^{+} μ^{-} μ^{+} ν_{μ}$ is performed using proton-proton collision data corresponding to an integrated luminosity of $4.7$ fb$…

hep-ex2018★ 22 cited

Measurement of the charm-mixing parameter $y_{C P}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +841

A measurement of the charm-mixing parameter $y_{C P}$ using $D^{0} \to K^{+} K^{-}$ , $D^{0} \to π^{+} π^{-}$ , and $D^{0} \to K^{-} π^{+}$ decays is reported. The $D^{0}$ mesons are required to originat…

physics.comp-ph2016★ 2 cited

Extending Geant4 Parallelism with External Libraries (MPI, TBB) and Its Use on HPC Resources

Andrea Dotti, Makoto Asai, Guy Barrand +2

With Geant4 Version 10.0, released in December 2013, one of the most widely used Monte-Carlo codes has been ported to take full advantage of multi- and many-core CPUs thanks to the…

physics.gen-ph2014

A vectorial form of the Schrödinger equation

Guy Barrand

We rewrite the time dependent Schrödinger equation by using only three dimensional vector algebra and by avoiding to introduce any complex numbers. We show that this equation leads…

physics.gen-ph2011

Is nature OO?

Guy Barrand

What exists "out there"? What does "doing physics" mean? What are the axiomatic ideas for microphysics? What is a particle? What is an apparatus made of? We show that Quantum Mecha…

Symmetric Lorentz-Minkowski, Antisymmetric Dirac-Majorana

Measurement of B+, B0 and Λb0​ production in pPb collisions at sNN​​=8.16TeV

Measurement of the CP-violating phase ϕs​ from Bs0​→J/ψπ+π− decays in 13 TeV pp collisions

Measurement of the mass difference between neutral charm-meson eigenstates

Amplitude analysis of Bs0​→KS0​K±π∓ decays

Dalitz plot analysis of the D+→K−K+K+ decay

Observation of the doubly Cabibbo-suppressed decay Ξc+​→pϕ

Measurement of the branching fraction and CP asymmetry in B+→J/ψρ+ decays

Study of the B0→ρ(770)0K∗(892)0 decay with an amplitude analysis of B0→(π+π−)(K+π−) decays

Search for the rare decay B+→μ+μ−μ+νμ​

Measurement of the charm-mixing parameter yCP​

Extending Geant4 Parallelism with External Libraries (MPI, TBB) and Its Use on HPC Resources

A vectorial form of the Schrödinger equation

Is nature OO?

Measurement of $B^{+}$ , $B^{0}$ and $Λ_{b}^{0}$ production in $p Pb$ collisions at $s_{NN} = 8.16 TeV$

Measurement of the $C P$ -violating phase $ϕ_{s}$ from $B_{s}^{0} \to J / ψ π^{+} π^{-}$ decays in 13 TeV $pp$ collisions

Amplitude analysis of $B_{s}^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays

Dalitz plot analysis of the $D^{+} \to K^{-} K^{+} K^{+}$ decay

Observation of the doubly Cabibbo-suppressed decay $Ξ_{c}^{+} \to pϕ$

Measurement of the branching fraction and $C P$ asymmetry in $B^{+} \to J / ψ ρ^{+}$ decays

Study of the $B^{0} \to ρ (770)^{0} K^{*} (892)^{0}$ decay with an amplitude analysis of $B^{0} \to (π^{+} π^{-}) (K^{+} π^{-})$ decays

Search for the rare decay $B^{+} \to μ^{+} μ^{-} μ^{+} ν_{μ}$

Measurement of the charm-mixing parameter $y_{C P}$