LHCb plots for 2018 data

PbPb annd PbNe Plots (approved 27th November 2018)

Plot Description
The invariant mass distribution of $\mu^+\mu^-$ reconstructed by the Hlt1 DiMuon trigger in both PbPb and PbNe SMOG collisions, with the number of Velo hits below 6000. The data correspond to about 110 $#mu b^{-1}$ integrated luminosity and 4.5E+20 Pb on Ne target. There are around 29K $J\/\psi$ signals, most of the signals come from PbPb collisions, and there are around 500 signal decays from PbNe data

PbPb annd PbNe Plots (approved 19th February 2019)

Plot Description
Invariant mass distribution of $\mu^+\mu^-$ in 2018 PbNe collisions. To remove ghost and upstream pollution, events with more than 10 PUHits are removed, and only events with PVz between -200 and 200 mm are kept (following previous SMOG studies). The standard SMOG $J/\psi$ selection is applied: hlt1 and hlt2 SMOG Dimuon trigger, $J/\psi$ stripping line (S35r1), and standard Jpsi selection (see LHCb-ANA-2018-008). The full dataset is used, $\sim$ 5.7E+20 Pb on Ne target. There are around 700 $J\/\psi$ signal candidates

Invariant mass distribution of $\K^\mp \pi^\pm$ in 2018 PbNe collisions. To remove ghost and upstream pollution, events with more than 10 PUHits are removed, and only events with PVz between -200 and 200 mm are kept (following previous SMOG studies). The standard SMOG $D^0$ selection is applied: hlt1 and hlt2 SMOG Kpi trigger, D0kpi stripping line (S35r1), and $D^0$ standard selection (see LHCb-ANA-2018-008) is adapted to reduce the combinatorial background: $p_T$(daughter) $> 650 MeV, DIRA > 0.9998$ and no cut on $\tau_{D^0}$. The full dataset is used, $\sim$ 5.7E+20 Pb on Ne target. There are around 1500 $D^0$ signal candidates

Invariant mass distribution of $\mu^+\mu^-$ in 2018 PbPb collisions in the event-activity class $60-90\%$. 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). A very small preliminary sample is used, with around 1800 J/$\psi$ signal candidates.

Invariant mass distribution of $\K^\mp \pi^\pm$ in 2018 PbPb collisions in the event-activity class $70-90\%$. The following $D^0$ selection is applied: D0kpi 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). A small preliminary sample is used. There are around 10500 $D^0$ signal candidates

-- SilviaBorghi - 2018-11-27

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf D0_2018PbPb.pdf r5 r4 r3 r2 r1 manage 25.3 K 2019-02-19 - 16:05 BenjaminAudurier  
PNGpng D0_2018PbPb.png r5 r4 r3 r2 r1 manage 104.5 K 2019-02-19 - 16:05 BenjaminAudurier  
PDFpdf Jpsi_PbPb2018.pdf r1 manage 17.4 K 2019-02-19 - 16:50 SamuelBelin  
PNGpng Jpsi_PbPb2018.png r1 manage 23.6 K 2019-02-19 - 17:08 SamuelBelin  
PDFpdf PbNe2018_D0Analysis.pdf r3 r2 r1 manage 16.9 K 2019-02-19 - 16:08 EmilieAmandineMaurice  
PNGpng PbNe2018_D0Analysis.png r3 r2 r1 manage 17.3 K 2019-02-19 - 16:08 EmilieAmandineMaurice  
PDFpdf PbNe2018_JpsiAnalysis.pdf r3 r2 r1 manage 19.3 K 2019-02-19 - 16:08 EmilieAmandineMaurice  
PNGpng PbNe2018_JpsiAnalysis.png r3 r2 r1 manage 16.5 K 2019-02-19 - 16:08 EmilieAmandineMaurice  
PDFpdf PbPb18DiMuonSMOGMass.pdf r1 manage 17.0 K 2018-11-27 - 14:59 YanxiZhang  
C source code filec PbPb18_DiMuon_SMOGMass.C r1 manage 7.7 K 2018-11-27 - 14:55 YanxiZhang Invariant mass distributions of mu+mu- reconstructed as Hlt1DiMuonHighMass
Unknown file formateps PbPb18_DiMuon_SMOGMass.eps r1 manage 13.5 K 2018-11-27 - 14:55 YanxiZhang Invariant mass distributions of mu+mu- reconstructed as Hlt1DiMuonHighMass
PDFpdf PbPb18_DiMuon_SMOGMass.pdf r1 manage 17.0 K 2018-11-27 - 14:57 YanxiZhang  
PNGpng PbPb18_DiMuon_SMOGMass.png r1 manage 62.7 K 2018-11-27 - 14:55 YanxiZhang Invariant mass distributions of mu+mu- reconstructed as Hlt1DiMuonHighMass
Edit | Attach | Watch | Print version | History: r24 < r23 < r22 < r21 < r20 | Backlinks | Raw View | WYSIWYG | More topic actions
Topic revision: r24 - 2019-02-19 - SamuelBelin
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    LHCb All webs login

This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback