LHCb plots for 2018 data

LHCb-ANA-2019-040: PbPb UPC 2018 Jpsi/Psi2S ratio measurement:

Fit to the di-muon invariant mass distributions to determine the yields of Jpsi, Psi(2S) and non-reson backgrounds. The selection of the di-muon candidates include StrippingHeavyIonDiMuonJpsi2MuMuLine in Stripping35a, muon pT>700 MeV, muon 2.0<eta<4.5, dimuon system pT<1 GeV, delta-phi of the two muons greater than 0.9*pi, requiring nLongTracks=2, and a Herschel ln(chi2_hrc)<8.35 with a 90% signal efficiency.

Plot Description
Fit to the di-muon mass distribution to determine the fractions of $\jpsi$,$\psitwos$ and non-resonant events. The black dots are the data points, the blue line is the result of the fit described in the text. The green line is the $\jpsi$ contribution, the red line is the $\psitwos$ contribution, and the yellow fill is the non resonance background contribution.
Fit to the di-muon mass to determine the fractions of $\jpsi$,$\psitwos$ and non-resonant events for rapidity bin $2.0<y < 2.5$.
Fit to the di-muon mass to determine the fractions of $\jpsi$,$\psitwos$ and non-resonant events for rapidity bin $2.5<y < 3.0$.
Fit to the di-muon mass to determine the fractions of $\jpsi$,$\psitwos$ and non-resonant events for rapidity bin $3.0<y < 3.5$.
Fit to the di-muon mass to determine the fractions of $\jpsi$,$\psitwos$ and non-resonant events for rapidity bin $3.5<y < 4.0$.
Fit to the di-muon mass to determine the fractions of $\jpsi$,$\psitwos$ and non-resonant events for rapidity bin $4.0<y < 4.5$.

LHCb-ANA-2019-0xx: Charm production in PbPb at √sNN = 5 TeV and pPb at √sNN = 8 TeV

Invariant mass distribution of $\mu^+\mu^-$ in the full 2018 PbPb datasets. Data are reconstructed up to 10000 nVeloClusters which correspond to a lower bound of $\sim 60\%$ in centrality. The following selection is used: JpsiToMuMu stripping line (S35) with the standard selection based on J/$\psi$ analysis note (see LHCb-ANA-2016-067) and a luminous region cut as well to reduce SMOG contamination (see details in the next description's plot). There are around 1800 J/$\psi$ signal candidates.

Plot Description
PbPb Plots  
Invariant mass distribution of $\K^{\mp} \pi^{\pm}$ in the full 2018 PbPb datasets. Data are reconstructed up to 10000 nVeloClusters which correspond to a lower bound of $\sim 60\%$ in centrality. The following $D^0$ selection is applied: HeavyIonOpenCharmD02kpiLine stripping line (S35), and $D^0$ standard selection in pPb (see CERN-LHCb-ANA-2016-012) is applied, together with a cut on the luminous region in order to reduce SMOG contamination : $ \abs{ z_{PV} }$ < 200 mm, 0.35 < $\rho$ <1.1 mm with $\rho =︎\sqrt{x_{PV}^2 + y_{PV}^2), based on the J/$\psi$ analysis note in 2015 PbPb collisions (see LHCb-ANA-2016-067). There are around 83000 $D^0$ signal candidates
Invariant mass distribution of $\K^{\pm} \pi^{\mp} \pi^{\mp}$ in the full 2018 PbPb datasets. Data are reconstructed up to 10000 nVeloClusters which correspond to a lower bound of $\sim 60\%$ in centrality. The following $D^+$ selection is applied: HeavyIonOpenCharmDp2KHHLine stripping line (S35), and $D^0$ standard selection in pPb (see CERN-LHCb-ANA-2016-012) is applied, together with a cut on the luminous region in order to reduce SMOG contamination : $ \abs{ z_{PV} }$ < 200 mm, 0.35 < $\rho$ <1.1 mm with $\rho =︎\sqrt{x_{PV}^2 + y_{PV}^2), based on the J/$\psi$ analysis note in 2015 PbPb collisions (see LHCb-ANA-2016-067). There are around 8900 $D^+$ signal candidates
Invariant mass distribution of $\K^{\pm} \K^{\mp} \pi^{\mp}$ in the full 2018 PbPb datasets. Data are reconstructed up to 10000 nVeloClusters which correspond to a lower bound of $\sim 60\%$ in centrality. The following $D_s^+$ selection is applied: HeavyIonOpenCharmDs2KKHLine stripping line (S35), and $D^0$ standard selection in pPb (see CERN-LHCb-ANA-2016-012) is applied, together with a cut on the luminous region in order to reduce SMOG contamination : $ \abs{ z_{PV} }$ < 200 mm, 0.35 < $\rho$ <1.1 mm with $\rho =︎\sqrt{x_{PV}^2 + y_{PV}^2), based on the J/$\psi$ analysis note in 2015 PbPb collisions (see LHCb-ANA-2016-067). There are around 1700 $D_s^+$ signal candidates
Invariant mass distribution of $\K^p \pi^- p$ (and charge-conjugate) in the full 2018 PbPb datasets. Data are reconstructed up to 10000 nVeloClusters which correspond to a lower bound of $\sim 60\%$ in centrality. The following $\Lamdba_c$ selection is applied: HeavyIonOpenCharmLc2PKpiLine stripping line (S35), and $D^0$ standard selection in pPb (see CERN-LHCb-ANA-2016-012) is applied, together with a cut on the luminous region in order to reduce SMOG contamination : $ \abs{ z_{PV} }$ < 200 mm, 0.35 < $\rho$ <1.1 mm with $\rho =︎\sqrt{x_{PV}^2 + y_{PV}^2), based on the J/$\psi$ analysis note in 2015 PbPb collisions (see LHCb-ANA-2016-067). There are around 600 $\Lamdba_c$ signal candidates
pPb Plots  
Distribution of the mass difference $\Delta M \equiv M(\mumu\g) - M(\mumu) $ for converted photons reconstructed from downstream track electrons in 2016 $p$Pb collisions at forward rapidity (integrated luminosity $\mathcal{L} = 13.6 \pm 0.3 \ \mub^{-1}$), integrated in $\pt$ and over $1.5 < y* < 4.0$. The distribution is fitted with a combination of Gaussian functions for the signal peaks and a 3rd degree Chebyshev polynomial for background. The following $\chicJ$ selection was applied: HeavyIonDiMuonJpsi2MuMuLine stripping line (S30r3), mass of the electron-positron pair $M_{ee} < 200 \text{ MeV}/c^{2}$, transverse momentum of the electron-positron pair $\pt^{ee} > 50 \text{ MeV}/c$; $\chicJ$, $\jpsi$, and $\mupm$ required to be within $2.0 < \eta < 4.0$; $\epm$ and $\g$ within $2.0 < \eta < 5.0$. The shown distribution also satisfies $\pt^{\g} > 600 \text{ MeV}/c$ and $3054 < M_{\jpsi} < 3138 \text{ MeV}/c^{2}$. Only events with at least one primary vertex were considered.
Distribution of the mass difference $\Delta M \equiv M(\mumu\g) - M(\mumu) $ for calorimetric photons in 2016 $p$Pb collisions at forward rapidity (integrated luminosity $\mathcal{L} = 13.6 \pm 0.3 \ \mub^{-1}$). The distribution is integrated over $1.5 < y* < 4.0$ and for $\pt^{\jpsi} > 3 \text{ GeV}/c$. The distribution is fitted with a combination of Gaussian functions describing the signal and a Mass-Difference Background Distribution. The following $\chicJ$ selection was applied: HeavyIonDiMuonJpsi2MuMuLine stripping line (S30r3), ECAL selection $E_{\rm HCAL}/E_{\rm ECAL}<0.3$, CL$>0.5$, and measured transverse momentum of the photon $\pt^{\g} > 300 \text{ MeV}/c$; $\chicJ$, $\jpsi$, and $\mupm$ required to be within $2.0 < \eta < 4.0$; $\g$ within $2.0 < \eta < 5.0$. The shown distribution also satisfies $\pt^{\g} > 600 \text{ MeV}/c$, $3054 < M_{\jpsi} < 3138 \text{ MeV}/c^{2}$, and $\pt^{\jpsi} > 3 \text{ GeV}/c$. Only events with at least one primary vertex were considered.

-- BenjaminAudurier - 2019-10-14

Topic attachments
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PDFpdf D0_PbPb_integrated.pdf r2 r1 manage 18.7 K 2019-10-26 - 16:28 BenjaminAudurier  
PNGpng D0_PbPb_integrated.png r2 r1 manage 102.3 K 2019-10-26 - 16:28 BenjaminAudurier  
PDFpdf Dplus_PbPb_integrated.pdf r2 r1 manage 17.2 K 2019-10-26 - 16:28 BenjaminAudurier  
PNGpng Dplus_PbPb_integrated.png r2 r1 manage 93.9 K 2019-10-26 - 16:28 BenjaminAudurier  
PDFpdf Ds_PbPb_integrated.pdf r2 r1 manage 23.0 K 2019-10-26 - 16:28 BenjaminAudurier  
PNGpng Ds_PbPb_integrated.png r2 r1 manage 92.5 K 2019-10-26 - 16:28 BenjaminAudurier  
PDFpdf LHCb_PbPbUPC2018_plots.pdf r1 manage 297.1 K 2019-10-28 - 17:27 HengneLiUVa  
PDFpdf Lc_PbPb_integrated.pdf r2 r1 manage 19.7 K 2019-10-26 - 16:28 BenjaminAudurier  
PNGpng Lc_PbPb_integrated.png r2 r1 manage 91.9 K 2019-10-26 - 16:28 BenjaminAudurier  
PDFpdf Pbp_DD_Gauss_ChebPol3_100_900.pdf r1 manage 17.8 K 2019-10-14 - 15:31 JanaCrkovska  
PNGpng Pbp_DD_Gauss_ChebPol3_100_900.png r1 manage 63.3 K 2019-10-14 - 15:31 JanaCrkovska  
PDFpdf Pbp_NC_Gauss_D0BG_250_700.pdf r1 manage 18.4 K 2019-10-14 - 15:33 JanaCrkovska  
PNGpng Pbp_NC_Gauss_D0BG_250_700.png r1 manage 61.7 K 2019-10-14 - 15:33 JanaCrkovska  
PDFpdf Performance_PbPb_pPb_v1.pdf r1 manage 694.9 K 2019-10-15 - 09:50 BenjaminAudurier  
PDFpdf mass_fit.pdf r1 manage 25.1 K 2019-10-28 - 17:16 HengneLiUVa  
PNGpng mass_fit.png r1 manage 65.4 K 2019-10-28 - 17:27 HengneLiUVa  
PDFpdf mass_fit_1.pdf r1 manage 26.0 K 2019-10-28 - 17:16 HengneLiUVa  
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PDFpdf pPb_DD_Gauss_ChebPol3_100_900.pdf r2 r1 manage 17.9 K 2019-10-21 - 21:39 JanaCrkovska  
PNGpng pPb_DD_Gauss_ChebPol3_100_900.png r2 r1 manage 73.6 K 2019-10-21 - 21:38 JanaCrkovska  
PDFpdf pPb_NC_Gauss_D0BG_250_700.pdf r2 r1 manage 18.3 K 2019-10-21 - 21:39 JanaCrkovska  
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