LHCb plots for 2018 data

LHCb plots for 2018 data
- PbPb annd PbNe Plots (approved 27th November 2018)
- PbPb annd PbNe Plots (approved 19th February 2019)

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

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

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 $\K^\mp \pi^\pm$ 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 $\mu^+\mu^-$ 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

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

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	D0_2018PbPb.pdf	r5 r4 r3 r2 r1	manage	25.3 K	2019-02-19 - 16:05	BenjaminAudurier
png	D0_2018PbPb.png	r5 r4 r3 r2 r1	manage	104.5 K	2019-02-19 - 16:05	BenjaminAudurier
pdf	Jpsi_PbPb2018.pdf	r1	manage	17.4 K	2019-02-19 - 16:50	SamuelBelin
png	Jpsi_PbPb2018.png	r1	manage	23.6 K	2019-02-19 - 17:08	SamuelBelin
pdf	PbNe2018_D0Analysis.pdf	r3 r2 r1	manage	16.9 K	2019-02-19 - 16:08	EmilieAmandineMaurice
png	PbNe2018_D0Analysis.png	r3 r2 r1	manage	17.3 K	2019-02-19 - 16:08	EmilieAmandineMaurice
pdf	PbNe2018_JpsiAnalysis.pdf	r3 r2 r1	manage	19.3 K	2019-02-19 - 16:08	EmilieAmandineMaurice
png	PbNe2018_JpsiAnalysis.png	r3 r2 r1	manage	16.5 K	2019-02-19 - 16:08	EmilieAmandineMaurice
pdf	PbPb18DiMuonSMOGMass.pdf	r1	manage	17.0 K	2018-11-27 - 14:59	YanxiZhang
c	PbPb18_DiMuon_SMOGMass.C	r1	manage	7.7 K	2018-11-27 - 14:55	YanxiZhang	Invariant mass distributions of mu+mu- reconstructed as Hlt1DiMuonHighMass
eps	PbPb18_DiMuon_SMOGMass.eps	r1	manage	13.5 K	2018-11-27 - 14:55	YanxiZhang	Invariant mass distributions of mu+mu- reconstructed as Hlt1DiMuonHighMass
pdf	PbPb18_DiMuon_SMOGMass.pdf	r1	manage	17.0 K	2018-11-27 - 14:57	YanxiZhang
png	PbPb18_DiMuon_SMOGMass.png	r1	manage	62.7 K	2018-11-27 - 14:55	YanxiZhang	Invariant mass distributions of mu+mu- reconstructed as Hlt1DiMuonHighMass

Topic revision: r24 - 2019-02-19 - SamuelBelin

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