Study the RPC contribution to the Barrel Muon Trigger

Aim of work:

• Study the RPC contribution to the Barrel Muon Trigger (Twinmux)

Stratgy:

1. To build probe TWinMux segment from RPC hits in layers 1 & 2 in station 1 and station 2 in Barrel region "see presentation by Reham"
2. To Build its angular variables (φ ,φ bending).
3. To Build the angular variables (φ ,φ bending) from the real TWinMux segments.
4. To produce a Twinmux Probe Segment from Track Extrapolation.
5. To compare the RPC Twinmux Segment with the probe from Track Extrapolation to measure resolution and efficiency.

Procedure:

- DT trees used to extract the information of the real TWinMux segments (φ ,φ bending).

- Adding the built probe TWinMux segment from step 1 in the stratgy to the DTDPG package under new branch "RPC_probe_TwinMux_segments"

- To get these RPC segmets follow the instructions in the GitHub page https://github.com/rehamMaly/DTDPGAnalysis/tree/RPC_probe_TwinMux_segments

- Build the probe TWinMux segments angular variables (φ ,φ bending).

- A comparison between the real and probe TWinMux segments' angular variables.

- Exploting the DT trees to the build some distributions about (φ ,φ bending) from DT segments only & DT+RPC segments & RPC only segments.

- Exploting the DT trees to see the occupancy under the effect of switching off 11 RPC chambers due to gas leak.

List of chambers:

• 4 W+1/S04/RB4+ 20 Sep 2017 Performance OK. Gas disconnected 20 Sep 2017 TS2.
• 5 W+1/S04/RB4-- 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 8 W+0/S01/RB4- 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 10 W+0/S07/RB34- 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 12 W-1/S01/RB3+ 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 14 W-1/S02/RB4- 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 16 W-1/S04/RB4++ 20 Sep 2017 Performance OK. Gas disconnected 20 Sep 2017 TS2.
• 18 W-1/S05/RB4+ 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 20 W-1/S07/RB4+ 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 22 W-1/S08/RB4- 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.
• 25 W-2/S03/RB3- 18 Sep 2017 Performance OK. Gas disconnected 18 Sep 2017 TS2.

On going steps:

- Trying to measure the efficiency depending on reconstructed muon object.

- Trying to add muon track extrapolation from tracker track using instructions from John

• Software package and instruction - https://gitlab.cern.ch/jhgoh/RPCDPGAnalysis/tree/master/SegmentAndTrackOnRPC
• RPCEfficiency from tracker muon overview and results in 2016 - https://twiki.cern.ch/twiki/bin/view/CMS/RPCEfficiencyFromTrackerMuon

Results:

1- Occupancy plots before and after Run 303832 for RPC only segments, DT only segments and RPC+DT segments

• Using runs 302635, 302634, 301998, 301627, 301161 for occupancy plots before run 303832.
• Using runs 303838, 304508, 304671, 304737, 304738 for occupancy plots after run 303832.

Occupancy plot for DT segments only for runs before run 303832	Occupancy plot for DT segments only for runs after run 303832
Occupancy plot for DT+RPC segments for runs before run 303832	Occupancy plot for DT+RPC segments for runs after run 303832
Occupancy plot for RPC segments only for runs before run 303832	Occupancy plot for RPC segments only for runs after run 303832

2- DT segments only (Rpcbit=0)

DT segments only (RPCbit=0)	Phi distribution for DT segments only (RPCbit =0)	Phi bending distribution for DT segments only (RPCbit =0)

3- DT+RPC segments (Rpcbit=1)

DT+RPC segments (RPCbit=1)	Phi distribution for DT+RPC segments (RPCbit =1)	Phi bending distribution for DT+RPC segments (RPCbit =1)

4- RPC segments only (Rpcbit=2)

RPC segments only (RPCbit=2)	Phi distribution for RPC segments only (RPCbit =2)	Phi bending distribution for RPC segments only (RPCbit =2)

5- Total (RPCbit=0,1,2)

RPCbit	Phi distribution	phi bending distribution

6- Phi distribution for different segments quality

Phi distribution for segment quality = 2	Phi distribution for segment quality = 3
Phi distribution for segment quality = 4	Phi distribution for segment quality = 5
Phi distribution for segment quality = 6

7- Phi bending distribution for different segment quality

Phi bending distribution for segment quality = 2	Phi bending distribution for segment quality = 3
Phi bending distribution for segment quality = 4	Phi bending distribution for segment quality = 5
Phi bending distribution for segment quality = 6

Useful Links:

• https://twiki.cern.ch/twiki/bin/viewauth/CMS/RPCTrigger
• https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideCMSPhysicsObjectSchool2017RPC