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SMOG2 CEP Lines V2

Allencris John Rubesh Rajan requested to merge ACJRR_CEP_Refined into ift-develop-augMD

Merge Request for lines for CEP events in SMOG2

Hlt2IFTFull_SMOG2_CEP_1_TRACK

Line that passes on events with one track of any particle which originates in the SMOG2 region ( -541 mm <= z <= -341 mm). This uses the make_smog2_particle_no_PV function defined in smog2_CEP_builders.py which returns the ParticleFilter algorithm. We allow a min_p and min_pt of 0.001 MeV. No PiD cut is applied, and the make_long_pions particle container is passed to it as we would like to look at long tracks. No mass hypothesis is applied and so this looks for any particle coming from SMOG2.

pHe

Efficiency: 0.004733037 +- 0.00788821 % Rate: 0.04733037 +- 0.0788821 kHz

pAr

Efficiency: 0.002654559 +- 0.000553506 % Rate: 0.02654559 +- 0.00553506 kHz

Hlt2IFTFull_SMOG2_CEP_2_TRACK

Line that passes on events with two tracks coming from the same secondary vertex in the SMOG2 region. We do this by creating a composite particle with the make_smog2_2_track_cep function defined in smog2_CEP_builders.py which returns the ParticleCombiner algorithm. This takes in two particle objects such as that defined for the line above. We require that the two particle "daughters" has a maximum Distance Of Closest Approach (DOCA) of 10 mm, and that the vertex they form is in the SMOG2 region. We also put a minimum pt on the daughters and the composite. The two particles we pass are the particles we define in Hlt2IFTFull_SMOG2_CEP_1_TRACK.

pHe

Efficiency: 0.001446206 +- 0.000436044 % Rate: 0.01446206 +- 0.00436044 kHz

pAr

Efficiency: 0.0006924936 +- 0.000282708 % Rate: 0.006924936 +- 0.00282708 kHz

Hlt2IFTFull_SMOG2_CEP_3_TRACK

Same as the line above, but we now build a composite with 3 "daughters" using the function make_smog2_3_track_cep function defined in smog2_CEP_builders.py which returns the ParticleCombiner algorithm.

pHe

Efficiency: 0.0002629465 +- 0.000185931 % Rate: 0.002629465 +- 00185931 kHz

pAr

Efficiency: 0 +- 0 % Rate: 0 +- 0 kHz

Hlt2IFTFull_SMOG2_CEP_4_TRACK

Same as the line above, but we now build a composite with 4 "daughters" using the function make_smog2_4_track_cep function defined in smog2_CEP_builders.py which returns the ParticleCombiner algorithm.

pHe

Efficiency: 0.0001314732 +- 0.000131473 % Rate: 0.001314732 +- 0.00131473 kHz

pAr

Efficiency: 0 +- 0 % Rate: 0 +- 0 kHz

Hlt2IFTFull_SMOG2_CEP_5_TRACK

Same as the line above, but we now build a composite with 5 "daughters" using the function make_smog2_5_track_cep function defined in smog2_CEP_builders.py which returns the ParticleCombiner algorithm.

pHe

Efficiency: 0.0001314732 +- 0.000131473 % Rate: 0.001314732 +- 0.00131473 kHz

pAr

Efficiency: 0 +- 0 % Rate: 0 +- 0 kHz

Hlt2IFTFull_SMOG2_CEP_2_MUON_TRACK

Same as Hlt2IFTFull_SMOG2_CEP_2_TRACK, but the track/particle objects we use are muons. We apply F.ISMUON and a PiD cut.

pHe

Efficiency: 0 % Rate: 0 kHz

pAr

Efficiency: 0 % Rate: 0 kHz

Hlt2IFTFull_SMOG2_CEP_2_MUON_MIXED_TRACK

Same as Hlt2IFTFull_SMOG2_CEP_2_TRACK, but one of the track/particle objects we use is a muon, and the other is any particle/track. We apply F.ISMUON and a PiD cut for the muon.

pHe

Efficiency: 0 % Rate: 0 kHz

pAr

Efficiency: 0 % Rate: 0 kHz

Note that all of these lines are intended to trigger in beam-empty events where there is no pp.

MC samples used in the development

  • IFT Hlt1 Filtered SMOG2 MixedEvents pAr nu037.
  • IFT Hlt1 Filtered SMOG2 pHe withoutUT

Data samples used in the development

Since CEP processes are not included in the MC samples, they are not reliable to evaluate the rates and bandwidth of these lines. Data is used to evaluate the rates and bandwidht. Samples used:

  • IFT SMOG2 pHe: Tested on 760,611 events.
    • data from Fill 9819, from HLT1 dumps of runs 300644, 300639, 300638, 299095, 299090, 299077, 299069. All runs were taken with Helium injection into SMOG2.
  • IFT SMOG2 pAr: Tested on 866,434 events.
    • data from Fill 9523, run 290437, taken with Argon injection into SMOG2.

Bandwidth for the pHe data: 8.151341487304285e-05 GB/s

Contact people

Allencris John Rubesh Rajan @aljohnru

Check-list

  • I have assumed that the descriptor attached to the lines is not physically relevant and so I have just used B0 -> number of pions required.
  • The muon lines may need to have a different pid cut applied.
Edited by Allencris John Rubesh Rajan

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