Cheat Sheet

Cheat sheet for the L1-Trigger Menu Grammar Specification version 7.0

Tip: for more information see L1-Trigger Menu Grammar Specification (PDF) (this document is outdated).

Logical operators

Supported logical operators are NOT, AND, OR, XOR


Object requirements

Supported object types are:

  • muon: MU
  • calorimeter: EG, JET, TAU
  • energy sums: ETM, HTM, ETT, HTT, ETTEM, ETMHF, ASYMET, ASYMHT, ASYMETHF, ASYMHTHF
  • minimum bias counts: MBT0HFP, MBT1HFP, MBT0HFM, MBT1HFM
  • tower counts: TOWERCOUNT

Examples:

MU10 single-muon pt >= 10.0 GeV

Various topological and/or special cuts can be applied to object requirements.

MU0[MU-ETA_2p1, MU-PHI_TOP, MU-QLTY_HIGH]
single-muon with applied topological and special cuts (η, φ and quality)

Applying BX offsets (triggering in a different BX), allowed range is -2, -1 +0 +1 and +2 BX.

JET0+2 jet with offset of 2 BX


Signals

Supported signal types are:

  • signals: CENT0...CENT7 (centralities)

Note: currently there is no wizard dialog for centrality signals, just type them in the expression.

Examples:

CENT0 AND NOT CENT1


Combinations

Combining multiple object requirements using function comb (short or combination).

Examples:

comb{ MU20, MU10 } di-muon

comb{ EG10, EG10, EG10 } tri-e/γ

comb{ JET40, JET30, JET20, JET10 } quad-jet

All objects requirements must be of same type an same BX offset.

comb{ MU0+2, MU0+2 }
di-muon with offset of 2 BX


Muon charge correlations

Valid for any di- tri- and quad-muon combinations. Possible values are ss (all charges of same signs) and os (charges of opposite signs).

Examples:

comb{ MU0, MU0, MU0, MU0 }[CHGCOR_OS]
muon charge correlation for four muons

dist{ MU0, MU0 }[DETA_2p1, CHGCOR_OS]
muon charge correlation applied to a eta correaltion of a di-muon


Topological correlations (Δη, Δφ)

Testing for topological correlations of two objects using function dist (short for distance).

Examples:

dist{ ETM75, JET60 }[DPHI_MIN_0p4]
topological correlation

dist{ MU0, MU0 }[DETA_MAX_1p8, CHGCOR_OS]
topological correlation combined with muon charge correlation


ΔR correlation

ΔR correlations of two objects are applied using function dist.

dist{ MU10, JET10 }[DR_4p5]
ΔR for muon/jet combination with min. ΔR of 4.5


Invariant mass

Invariant mass of two objects is applied using function mass_inv.

Examples:

mass_inv{ JET30, JET30 }[MASS_MIN_400]
invariant mass for two jets with min. threshold of 400 GeV


Transverse mass

Transverse mass of two objects is applied using function mass_trv.

Examples:

mass_trv{ JET30, ETM100 }[MASS_MIN_250]
transverse mass for jet and MET with min. threshold of 250 GeV


Overlap removal

For calorimeter object requirements it is possible to surpress possible duplicated objects of another type using a technique named overlap removal. This is provided by functions comb_orm, dist_orm and mass_inv_orm.

Objects that are within the range of cuts ORMDETA, ORMDPHI and/or ORMDR are removed from the decision.

Note: the reference object requirement for overlap removal is implicitly added to the final decision using AND.

Examples 1+1:

comb_orm{ JET30, TAU30 }[ORMDR_2p4]
a single jet that is not a tau -- and at least a single tau

dist_orm{ TAU10, JET10 }[ORMDETA_1p2, DR_2p4]
delta-R between single tau and jet, the tau is not a jet -- and at least a single jet

Examples 2+1:

comb_orm{ JET30, JET30, TAU30 }[ORMETA_2p1]
a di-jet that contains no taus -- and at least a single tau

mass_inv{ JET30, JET30, TAU30 }[ORMDR_2p4, MASS_MIN_250]
invariant mass of a di-jet that contains no taus -- and at least a single tau