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Draft: HLT1 DiLambda Line

Jiahui Zhuo requested to merge jzhuo_DiLambda into 2024-patches

The exclusive DiLambda line triggers the \Lambda \overline{\Lambda} pairs. Both Lambdas can be reconstructed as long tracks.

This line is aimed at studying physics events such as J/\psi \to \Lambda \overline{\Lambda}.

The selection criteria for each Lambda are the same as those for the existing inclusive Lambda line. However, the output rate of the inclusive Lambda line is excessively high, leading to the decision to exclude it from the BW division.

In this MR, we introduce a new line that requires the triggering of both \Lambda and \overline{\Lambda} by the inclusive lambda selection within the same event.

The output rate is ( 0.60 +/- 0.42) kHz for 2024-expected-MinBiasMD.

The efficiency is (6.35 +- 3.07)%, with an overlap of 0 +/- 7% with Hlt1LambdaLLDetachedTrack and 6 +/- 6% with Hlt1TwoTrackMVA.

FYI: @adeoyang @femartin @ziyiw @tevans @mstahl @isanders @msaur @vsvintoz

Edited by Jiahui Zhuo

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