E. Gkougkousis

activity

20142026

most citedTest of lepton universality in beauty-quark decays

372 citations · 4.6k across the 206 of their papers we have counts for

collaborators

Showing 2020Show all

23 papers · 1 filter

hep-ex2020★ 103 cited

Angular analysis of the $B^{+} \to K^{*+} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +959

We present an angular analysis of the $B^{+} \to K^{*+} (\to K_{S}^{0} π^{+}) μ^{+} μ^{-}$ decay using 9$\,\mbox{fb}^{-1}$ of $pp$ collision data collected with the L…

hep-ex2020★ 19 cited

Measurement of CP violation in the decay $B^{+} \to K^{+} π^{0}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +960

A measurement of direct CP violation in the decay $B^{+} \to K^{+} π^{0}$ is reported using a data sample corresponding to an integrated luminosity of 5.4 $\textrm{fb}^{-1}…

hep-ex2020★ 4 cited

Observation of the $B_{s}^{0} \to D^{*\pm} D^{\mp}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +963

A search for the $B_{s}^{0} \to D^{*\pm} D^{\mp}$ decay is performed using proton-proton collision data at centre-of-mass energies of $7$ , $8$ and $13 TeV$ collected by…

hep-ex2020★ 268 cited

Evidence of a $J / ψ Λ$ structure and observation of excited $Ξ^{-}$ states in the $Ξ_{b}^{-} \to J / ψ Λ K^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +959

First evidence of a structure in the $J / ψ Λ$ invariant mass distribution is obtained from an amplitude analysis of $Ξ_{b}^{-} \to J / ψ Λ K^{-}$ decays. The observed s…

hep-ex2020★ 27 cited

Measurement of $C P$ observables in $B^{\pm} \to D^{()} K^{\pm}$ and $B^{\pm} \to D^{()} π^{\pm}$ decays using two-body $D$ final states

LHCb collaboration, R. Aaij, C. Abellán Beteta +957

Measurements of $C P$ observables in $B^{\pm} \to D^{(*)} K^{\pm}$ and $B^{\pm} \to D^{(*)} π^{\pm}$ decays are presented, where $D^{(*)}$ indicates a neutral $D$ or $D^{*}$ …

hep-ex2020★ 23 cited

Observation of $C P$ violation in two-body $B_{(s)}^{0}$ -meson decays to charged pions and kaons

LHCb collaboration, R. Aaij, C. Abellán Beteta +966

The time-dependent $C P$ asymmetries of $B^{0} \to π^{+} π^{-}$ and $B_{s}^{0} \to K^{+} K^{-}$ decays are measured using a data sample of $pp$ collisions corresponding to an integrated lu…

hep-ex2020★ 39 cited

First observation of the decay $B_{s}^{0} \to K^{-} μ^{+} ν_{μ}$ and a measurement of $∣ V_{u b} ∣/∣ V_{c b} ∣$

LHCb collaboration, R. Aaij, C. Abellán Beteta +961

The first observation of the suppressed semileptonic $B_{s}^{0} \to K^{-} μ^{+} ν_{μ}$ decay is reported. Using a data sample recorded in {\it pp} collisions in 2012 with the LHCb detector, co…

hep-ex2020★ 14 cited

Search for long-lived particles decaying to $e^{\pm} μ^{\mp} ν$

LHCb collaboration, R. Aaij, C. Abellán Beteta +975

Long-lived particles decaying to $e^{\pm} μ^{\mp} ν$ , with masses between 7 and $50$ GeV/c $^{2}$ and lifetimes between 2 and $50$ ps, are searched for by looking at displaced vertices co…

hep-ex2020★ 3 cited

Observation of the $Λ_{b}^{0} \to Λ_{c}^{+} K^{+} K^{-} π^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +975

The $Λ_{b}^{0} \to Λ_{c}^{+} K^{+} K^{-} π^{-}$ decay is observed for the first time using a data sample of proton-proton collisions at centre-of-mass energies of $s = 7$ …

hep-ex2020★ 16 cited

Measurement of the CKM angle $γ$ and $B_{s}^{0}$ - $B ˉ_{s}^{0}$ mixing frequency with $B_{s}^{0} \to D_{s}^{\mp} h^{\pm} π^{\pm} π^{\mp}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +963

The CKM angle $γ$ is measured for the first time from mixing-induced $C P$ violation between $B_{s}^{0} \to D_{s}^{\mp} K^{\pm} π^{\pm} π^{\mp}$ and $\bar{B}^0_s \rightarrow D_s^\pm K^\mp…

hep-ex2020★ 30 cited

Observation of a new excited $D_{s}^{+}$ meson in $B^{0} \to D^{-} D^{+} K^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +961

Using $pp$ collision data corresponding to an integrated luminosity of $5.4 fb^{- 1}$ collected with the LHCb detector at a center-of-mass energy of $13 TeV$ , the $B^0…

hep-ex2020★ 29 cited

Search for heavy neutral leptons in $W^{+} \to μ^{+} μ^{\pm} jet$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +980

A search is performed for heavy neutrinos in the decay of a $W$ boson into two muons and a jet. The data set corresponds to an integrated luminosity of approximately $3.0 \text{ fb…

hep-ex2020★ 26 cited

Study of $B_{s}^{0} \to J / ψ π^{+} π^{-} K^{+} K^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +958

The decays $B_{s}^{0} \to J / ψ π^{+} π^{-} K^{+} K^{-}$ are studied using a data set corresponding to an integrated luminosity of 9fb $^{- 1}$ , collected with the LHCb detector in proton-pr…

hep-ex2020

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

LHCb collaboration, R. Aaij, C. Abellán Beteta +998

A search is performed for rare and forbidden charm decays of the form $D_{(s)}^{+} \to h^{\pm} ℓ^{+} ℓ^{(') \mp}$ , where $h^{\pm}$ is a pion or kaon and $ℓ^{(^{'}) \pm}$ is an ele…

hep-ex2020★ 16 cited

Observation of new excited $B_{s}^{0}$ states

LHCb collaboration, R. Aaij, C. Abellán Beteta +972

A structure is observed in the $B^{+} K^{-}$ mass spectrum in a sample of proton--proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and…

hep-ex2020★ 46 cited

Observation of a new $Ξ_{b}^{0}$ state

LHCb collaboration, R. Aaij, C. Abellán Beteta +957

Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb $^{- 1}$ , the observation of a new excited $Ξ_{b}^{0}$ r…

hep-ex2020★ 7 cited

Measurement of the branching fraction of the $B^{0} \to D_{s}^{+} π^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +949

A branching fraction measurement of the $B^{0} \to D_{s}^{+} π^{-}$ decay is presented using proton-proton collision data collected with the LHCb experiment, corresponding to…

hep-ex2020★ 8 cited

Measurement of differential $b b ˉ$ - and $c c ˉ$ -dijet cross-sections in the forward region of $pp$ collisions at $s = 13 TeV$

LHCb collaboration, R. Aaij, C. Abellán Beteta +975

The inclusive $b b ˉ$ - and $c c ˉ$ -dijet production cross-sections in the forward region of $pp$ collisions are measured using a data sample collected with the LHCb detecto…

hep-ex2020★ 34 cited

Measurement of the CKM angle $γ$ in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ decays with $D \to K_{S}^{0} h^{+} h^{-}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +975

A measurement of $C P$ -violating observables is performed using the decays $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ , where the $D$ meson is reconstructed in one of the self-conjuga…

hep-ex2020★ 26 cited

Strong constraints on the $b \to s γ$ photon polarisation from $B^{0} \to K^{* 0} e^{+} e^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +976

An angular analysis of the $B^{0} \to K^{* 0} e^{+} e^{-}$ decay is performed using a data sample corresponding to an integrated luminosity of $9 fb^{- 1}$ of $pp$ collisions collect…

physics.ins-det2020★ 9 cited

Beam test results of IHEP-NDL Low Gain Avalanche Detectors(LGAD)

S. Xiao, S. Alderweireldt, S. Ali +96

To meet the timing resolution requirement of up-coming High Luminosity LHC (HL-LHC), a new detector based on the Low-Gain Avalanche Detector(LGAD), High-Granularity Timing Detector…

physics.ins-det2020★ 12 cited

Radiation Campaign of HPK Prototype LGAD sensors for the High-Granularity Timing Detector (HGTD)

X. Shi, M. K. Ayoub, J. Barreiro Guimarães da Costa +74

We report on the results of a radiation campaign with neutrons and protons of Low Gain Avalanche Detectors (LGAD) produced by Hamamatsu (HPK) as prototypes for the High-Granularity…

physics.ins-det2020★ 31 cited

Layout and Performance of HPK Prototype LGAD Sensors for the High-Granularity Timing Detector

X. Yang, S. Alderweireldt, N. Atanov +76

The High-Granularity Timing Detector is a detector proposed for the ATLAS Phase II upgrade. The detector, based on the Low-Gain Avalanche Detector (LGAD) technology will cover the…

Angular analysis of the B+→K∗+μ+μ− decay

Measurement of CP violation in the decay B+→K+π0

Observation of the Bs0​→D∗±D∓ decay

Evidence of a J/ψΛ structure and observation of excited Ξ− states in the Ξb−​→J/ψΛK− decay

Measurement of CP observables in B±→D(∗)K± and B±→D(∗)π± decays using two-body D final states

Observation of CP violation in two-body B(s)0​-meson decays to charged pions and kaons

First observation of the decay Bs0​→K−μ+νμ​ and a measurement of ∣Vub​∣/∣Vcb​∣

Search for long-lived particles decaying to e±μ∓ν

Observation of the Λb0​→Λc+​K+K−π− decay

Measurement of the CKM angle γ and Bs0​-Bˉs0​ mixing frequency with Bs0​→Ds∓​h±π±π∓ decays

Observation of a new excited Ds+​ meson in B0→D−D+K+π− decays

Search for heavy neutral leptons in W+→μ+μ±jet decays

Study of Bs0​→J/ψπ+π−K+K− decays

Searches for 25 rare and forbidden decays of D+ and Ds+​ mesons

Observation of new excited Bs0​ states

Observation of a new Ξb0​ state

Measurement of the branching fraction of the B0→Ds+​π− decay

Measurement of differential bbˉ- and ccˉ-dijet cross-sections in the forward region of pp collisions at s​=13 TeV

Measurement of the CKM angle γ in B±→DK± and B±→Dπ± decays with D→KS0​h+h−

Strong constraints on the b→sγ photon polarisation from B0→K∗0e+e− decays

Beam test results of IHEP-NDL Low Gain Avalanche Detectors(LGAD)

Radiation Campaign of HPK Prototype LGAD sensors for the High-Granularity Timing Detector (HGTD)

Layout and Performance of HPK Prototype LGAD Sensors for the High-Granularity Timing Detector

Angular analysis of the $B^{+} \to K^{*+} μ^{+} μ^{-}$ decay

Measurement of CP violation in the decay $B^{+} \to K^{+} π^{0}$

Observation of the $B_{s}^{0} \to D^{*\pm} D^{\mp}$ decay

Evidence of a $J / ψ Λ$ structure and observation of excited $Ξ^{-}$ states in the $Ξ_{b}^{-} \to J / ψ Λ K^{-}$ decay

Measurement of $C P$ observables in $B^{\pm} \to D^{()} K^{\pm}$ and $B^{\pm} \to D^{()} π^{\pm}$ decays using two-body $D$ final states

Observation of $C P$ violation in two-body $B_{(s)}^{0}$ -meson decays to charged pions and kaons

First observation of the decay $B_{s}^{0} \to K^{-} μ^{+} ν_{μ}$ and a measurement of $∣ V_{u b} ∣/∣ V_{c b} ∣$

Search for long-lived particles decaying to $e^{\pm} μ^{\mp} ν$

Observation of the $Λ_{b}^{0} \to Λ_{c}^{+} K^{+} K^{-} π^{-}$ decay

Measurement of the CKM angle $γ$ and $B_{s}^{0}$ - $B ˉ_{s}^{0}$ mixing frequency with $B_{s}^{0} \to D_{s}^{\mp} h^{\pm} π^{\pm} π^{\mp}$ decays

Observation of a new excited $D_{s}^{+}$ meson in $B^{0} \to D^{-} D^{+} K^{+} π^{-}$ decays

Search for heavy neutral leptons in $W^{+} \to μ^{+} μ^{\pm} jet$ decays

Study of $B_{s}^{0} \to J / ψ π^{+} π^{-} K^{+} K^{-}$ decays

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

Observation of new excited $B_{s}^{0}$ states

Observation of a new $Ξ_{b}^{0}$ state

Measurement of the branching fraction of the $B^{0} \to D_{s}^{+} π^{-}$ decay

Measurement of differential $b b ˉ$ - and $c c ˉ$ -dijet cross-sections in the forward region of $pp$ collisions at $s = 13 TeV$

Measurement of the CKM angle $γ$ in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ decays with $D \to K_{S}^{0} h^{+} h^{-}$

Strong constraints on the $b \to s γ$ photon polarisation from $B^{0} \to K^{* 0} e^{+} e^{-}$ decays