Y. Amhis

activity

20092026

b

-hadron,

c

-hadron, and

τ

-lepton properties as of summer 2016

1.4k citations · 34.2k across the 679 of their papers we have counts for

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25 papers · 1 filter

hep-ph2022

The branching fraction of $B_{s} \to K^{0} K ˉ^{0}$ : Three puzzles

Yasmine Amhis, Yuval Grossman, Yosef Nir

The branching fraction of the $B_{s} \to K^{0} K ˉ^{0}$ decay has been recently measured by the LHCb and Belle experiments. We study the consistency of the measured value with three rel…

hep-ex2022★ 3 cited

First observation and branching fraction measurement of the $Λ_{b}^{0} \to D_{s}^{-} p$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1048

The first observation of the $Λ_{b}^{0} \to D_{s}^{-} p$ decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of ${\sqrt{s}=13 \…

hep-ex2022★ 12 cited

Search for rare decays of $D^{0}$ mesons into two muons

LHCb collaboration

A search for the very rare $D^{0} \to μ^{+} μ^{-}$ decay is performed using data collected by the LHCb experiment in proton-proton collisions at $s = 7$ , 8 and $13 TeV$ , corre…

hep-ex2022★ 112 cited

Measurement of lepton universality parameters in $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1047

A simultaneous analysis of the $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays is performed to test muon-electron universality in two ranges of the square of the di…

hep-ex2022★ 126 cited

Test of lepton universality in $b \to s ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1047

The first simultaneous test of muon-electron universality using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays is performed, in two r…

hep-ex2022★ 80 cited

First observation of a doubly charged tetraquark and its neutral partner

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1055

A combined amplitude analysis is performed for the decays $B^{0} \to D^{0} D_{s}^{+} π^{-}$ and $B^{+} \to D^{-} D_{s}^{+} π^{+}$ , which are related by isospin symmetry. The an…

hep-ex2022★ 17 cited

Open charm production and asymmetry in $p$ Ne collisions at $s_{NN} =$ 68.5 GeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1053

A measurement of $D^{0}$ meson production by the LHCb experiment in its fixed-target configuration is presented. The production of $D^{0}$ mesons is studied with a beam of 2.5 TeV prot…

hep-ex2022★ 3 cited

Long-lived particle reconstruction downstream of the LHCb magnet

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1113

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 di…

hep-ex2022★ 9 cited

First observation of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1048

The $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay is observed for the first time using proton-proton collision data collected by the LHCb detector at centre-of-mass energies of $7$ , $8$ …

hep-ex2022★ 40 cited

Observation of a resonant structure near the $D_{s}^{+} D_{s}^{-}$ threshold in the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1048

An amplitude analysis of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data c…

hep-ex2022★ 1 cited

Observation of the $B_{s}^{0} \to D^{+} D^{-}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1059

The first observation of the $B_{s}^{0} \to D^{*+} D^{*-}$ decay and the measurement of its branching ratio relative to the $B^{0} \to D^{*+} D^{*-}$ decay are presented. The data sample…

hep-ex2022★ 4 cited

Measurement of the ratio of branching fractions $B (B_{c}^{+} \to B_{s}^{0} π^{+}) / B (B_{c}^{+} \to J / ψ π^{+})$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1054

The ratio of branching fractions of $B_{c}^{+} \to B_{s}^{0} π^{+}$ and $B_{c}^{+} \to J / ψ π^{+}$ decays is measured with proton-proton collision data of a centre-of-mass energy of $13 TeV$ .…

hep-ph2022

Dispersive analysis of $Λ_{b} \to Λ (1520)$ local form factors

Yasmine Amhis, Marzia Bordone, Méril Reboud

We perform an analysis of $Λ_{b} \to Λ (1520)$ local form factors. We use dispersive techniques to provide a model-independent parametrisation of the form factors that can be used in th…

hep-ex2022★ 2 cited

Study of $B_{c}^{+}$ meson decays to charmonia plus multihadron final states

LHCb Collaboration, R. Aaij, A. S. W. Abdelmotteleb +1058

Four decay modes of the $B_{c}^{+}$ meson into a $J / ψ$ meson and multiple charged kaons or pions are studied using proton-proton collision data, collected with the~LHCb detector at cen…

hep-ex2022★ 10 cited

Search for the lepton-flavour violating decays $B^{0} \to K^{* 0} μ^{\pm} e^{\mp}$ and $B_{s}^{0} \to ϕ μ^{\pm} e^{\mp}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1003

A search for the lepton-flavour violating decays $B^{0} \to K^{* 0} μ^{\pm} e^{\mp}$ and $B_{s}^{0} \to ϕ μ^{\pm} e^{\mp}$ is presented, using proton-proton collision data collected by the LHCb de…

hep-ph2022

High Energy Physics activities in Africa: An overview

Yasmine Amhis, Mohamed Chabab, Zinhle Buthelzi

This document summarizes our best knowledge of the ongoing High Energy Physics activities in Africa. The information was primarily extracted from the first ASFAP Particle Physics d…

hep-ex2022★ 11 cited

Evidence for modification of $b$ quark hadronization in high-multiplicity $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

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 f…

hep-ex2022★ 25 cited

Observation of sizeable $ω$ contribution to $χ_{c 1} (3872) \to π^{+} π^{-} J / ψ$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

Resonant structures in the dipion mass spectrum from $χ_{c 1} (3872) \to π^{+} π^{-} J / ψ$ decays, produced via $B^{+} \to K^{+} χ_{c 1} (3872)$ decays, are analyzed using proton-proton collision da…

nucl-ex2022★ 15 cited

Nuclear modification factor of neutral pions in the forward and backward regions in $p$ -Pb collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

The nuclear modification factor of neutral pions is measured in proton-lead collisions collected at a center-of-mass energy per nucleon of $8.16 TeV$ with the LHCb detector.…

hep-ex2022★ 9 cited

Search for the doubly heavy baryon $Ξ_{bc}^{+}$ decaying to $J / ψ Ξ_{c}^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

A first search for the $Ξ_{bc}^{+} \to J/ ψ Ξ_{c}^{+}$ decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrate…

hep-ex2022★ 11 cited

Measurement of the charm mixing parameter $y_{C P} - y_{C P}^{K π}$ using two-body $D^{0}$ meson decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +995

A measurement of the ratios of the effective decay widths of $D^{0} \to π^{-} π^{+}$ and $D^{0} \to K^{-} K^{+}$ decays over that of $D^{0} \to K^{-} π^{+}$ decays is performed with the LHCb experiment…

hep-ex2022★ 33 cited

Observation of the doubly charmed baryon decay $Ξ_{cc}^{++} \to Ξ_{c}^{^{'} +} π^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +995

The $Ξ_{cc}^{++} \to Ξ_{c}^{^{'} +} π^{+}$ decay is observed using proton-proton collisions collected by the LHCb experiment at a centre-of-mass energy of $13\mathrm{\,Te\kern -0.1e…

hep-ex2022★ 11 cited

Study of charmonium and charmonium-like contributions in $B^{+} \to J / ψ η K^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +995

A study of $B^{+} \to J / ψ η K^{+}$ decays, followed by $J / ψ \to μ^{+} μ^{-}$ and $η \to γ γ$ , is performed using a dataset collected with the LHCb detector in proton-pro…

hep-ex2022

Search for the decay $B^{0} \to ϕ μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +988

A search for the decay $B^{0} \to ϕ μ^{+} μ^{-}$ is performed using proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV collected by the LHCb experiment and corresponding…

The branching fraction of Bs​→K0Kˉ0: Three puzzles

First observation and branching fraction measurement of the Λb0​→Ds−​p decay

Search for rare decays of D0 mesons into two muons

Measurement of lepton universality parameters in B+→K+ℓ+ℓ− and B0→K∗0ℓ+ℓ− decays

Test of lepton universality in b→sℓ+ℓ− decays

First observation of a doubly charged tetraquark and its neutral partner

Open charm production and asymmetry in pNe collisions at sNN​​= 68.5 GeV

Long-lived particle reconstruction downstream of the LHCb magnet

First observation of the B+→Ds+​Ds−​K+ decay

Observation of a resonant structure near the Ds+​Ds−​ threshold in the B+→Ds+​Ds−​K+ decay

Observation of the Bs0​→D∗+D∗− decay

Measurement of the ratio of branching fractions B(Bc+​→Bs0​π+)/B(Bc+​→J/ψπ+)

Dispersive analysis of Λb​→Λ(1520) local form factors

Study of Bc+​ meson decays to charmonia plus multihadron final states

Search for the lepton-flavour violating decays B0→K∗0μ±e∓ and Bs0​→ϕμ±e∓

High Energy Physics activities in Africa: An overview

Evidence for modification of b quark hadronization in high-multiplicity pp collisions at s​=13 TeV

Observation of sizeable ω contribution to χc1​(3872)→π+π−J/ψ decays

Nuclear modification factor of neutral pions in the forward and backward regions in p-Pb collisions

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

Measurement of the charm mixing parameter yCP​−yCPKπ​ using two-body D0 meson decays

Observation of the doubly charmed baryon decay Ξcc++​→Ξc′+​π+

Study of charmonium and charmonium-like contributions in B+→J/ψηK+ decays

Search for the decay B0→ϕμ+μ−

The branching fraction of $B_{s} \to K^{0} K ˉ^{0}$ : Three puzzles

First observation and branching fraction measurement of the $Λ_{b}^{0} \to D_{s}^{-} p$ decay

Search for rare decays of $D^{0}$ mesons into two muons

Measurement of lepton universality parameters in $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays

Test of lepton universality in $b \to s ℓ^{+} ℓ^{-}$ decays

Open charm production and asymmetry in $p$ Ne collisions at $s_{NN} =$ 68.5 GeV

First observation of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

Observation of a resonant structure near the $D_{s}^{+} D_{s}^{-}$ threshold in the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

Observation of the $B_{s}^{0} \to D^{+} D^{-}$ decay

Measurement of the ratio of branching fractions $B (B_{c}^{+} \to B_{s}^{0} π^{+}) / B (B_{c}^{+} \to J / ψ π^{+})$

Dispersive analysis of $Λ_{b} \to Λ (1520)$ local form factors

Study of $B_{c}^{+}$ meson decays to charmonia plus multihadron final states

Search for the lepton-flavour violating decays $B^{0} \to K^{* 0} μ^{\pm} e^{\mp}$ and $B_{s}^{0} \to ϕ μ^{\pm} e^{\mp}$

Evidence for modification of $b$ quark hadronization in high-multiplicity $pp$ collisions at $s = 13$ TeV

Observation of sizeable $ω$ contribution to $χ_{c 1} (3872) \to π^{+} π^{-} J / ψ$ decays

Nuclear modification factor of neutral pions in the forward and backward regions in $p$ -Pb collisions

Search for the doubly heavy baryon $Ξ_{bc}^{+}$ decaying to $J / ψ Ξ_{c}^{+}$

Measurement of the charm mixing parameter $y_{C P} - y_{C P}^{K π}$ using two-body $D^{0}$ meson decays

Observation of the doubly charmed baryon decay $Ξ_{cc}^{++} \to Ξ_{c}^{^{'} +} π^{+}$

Study of charmonium and charmonium-like contributions in $B^{+} \to J / ψ η K^{+}$ decays

Search for the decay $B^{0} \to ϕ μ^{+} μ^{-}$