IFT femtoscopy lines

Summary: This MR adds 35 HLT2 lines (3 full event and 32 TURBO) selecting a total rate of about 1 kHz (assuming 1 MHz input rate and no HLT1 filter; the actual rate will be substantially lower due to the Hlt1L02ppi filter).

Add lines for nucleon-hyperon and hyperon-hyperon femtoscopy studies. The aim is to study femtoscopic correlations between particle pairs using 2023 data. As a result, we are focusing on pairs that will give us adequate statistics with low luminosity and that can make use of a high-rate HLT1 inclusive

$\Lambda$

line, Hlt1L02ppi. We also plan to include some initial

$\Lambda$

-charm lines, as these benefit from Hlt1L02ppi and will serve as a precursor for future measurements studying exotic hadrons using femtoscopic correlations.

Lines include:

• inclusive (prescaled)
  $\Lambda\to p\pi^-$
• inclusive (prescaled)
  $\Xi^-\to\Lambda\pi^-$
• inclusive (prescaled)
  $\Omega^-\to\Lambda K^-$
• $p-\Lambda$
• $p-\overline{\Lambda}$
• $\Lambda-\Lambda$
• $\Lambda-\overline{\Lambda}$
• $p-\Xi^-$
• $p-\Xi^+$
• $\Xi^--\Xi^-$
• $\Xi^--\Xi^+$
• $p-\Omega^-$
• $p-\Omega^+$
• $\Omega^--\Omega^-$
• $\Omega^--\Omega^+$

TODO

• Add lines for pairs of different hyperons (e.g.
  $\Lambda-\Xi^-$
  )
• Add lines for
  $\Lambda-D^{0,\pm}_{(s)}$
  and
  $\Lambda-\Lambda^{\pm}_c$
• Add configuration with full-rate low-k* lines and prescaled high-k* lines
• Determine rates and prescales

added RTA label

added 6 commits

• 93fd5e9d - add Xi-Lambda, Omega-Lambda and Omega-Xi lines, fix Xim->Omegam in few names
• 151495ed - merge AB and AB~ lines into one
• 7e7efcfe - add charm-hyperon lines with Lambda_c+, Xi_c+/0, D0/+
• 4cffeefd - change Lambda builder to common in inclusive signle Lambda line
• d0425c33 - add lowK line variant for pp, Lambdap, Xip, Omegap, LambdaLambda, XiLambda
• 8dfef8f9 - fixes

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Hi @thboettc, I have done some work on the branch, which included

• what I believe are fixes (builder in inclusive single Lambda, Xim->Omega in few algorithm names...)
• and improvements (merging AB and AB~ lines into one).

Plus added new functional:

• more lines like Xi-Lambda, Omega-Lambda, Omega-Xi
• lowK variants of selected lines (pp, Lambdap, Xip, Omegap, LambdaLambda, XiLambda)
• added lines with charm (Lc+,Xic+/0,D+/0)

would you please check if you agree with it.

I'm not sure it's final changes from my side or not. As for now I'm in process of testing for which I hope I don't need to update & recompile my local stack...

added 68 commits

• 8dfef8f9...3f4dfd39 - 58 commits from branch master
• b2a56fef - Add particle makers for femtoscopy lines
• b444aa5c - Add hyperon femtoscopy lines
• b6b3ce93 - Add configurable k* maximum and Hlt1 filter to femtoscopy lines
• e9b55822 - add Xi-Lambda, Omega-Lambda and Omega-Xi lines, fix Xim->Omegam in few names
• 061ad9b2 - merge AB and AB~ lines into one
• e3339fed - add charm-hyperon lines with Lambda_c+, Xi_c+/0, D0/+
• e043c75e - change Lambda builder to common in inclusive signle Lambda line
• 223c2a56 - add lowK line variant for pp, Lambdap, Xip, Omegap, LambdaLambda, XiLambda
• 7faea656 - fixes
• 43f345a1 - copyright and format

Compare with previous version

added 58 commits

• 43f345a1...a6e92617 - 46 commits from branch master
• 2bcb8b6e - Add particle makers for femtoscopy lines
• cc6d6864 - Add hyperon femtoscopy lines
• 65a026ff - Add configurable k* maximum and Hlt1 filter to femtoscopy lines
• 5cda53e7 - add Xi-Lambda, Omega-Lambda and Omega-Xi lines, fix Xim->Omegam in few names
• 5acf31fb - merge AB and AB~ lines into one
• 2f103a8e - add charm-hyperon lines with Lambda_c+, Xi_c+/0, D0/+
• 5f9ef43d - change Lambda builder to common in inclusive signle Lambda line
• e8b80de4 - add lowK line variant for pp, Lambdap, Xip, Omegap, LambdaLambda, XiLambda
• 93f03fb7 - fixes
• 1880d057 - copyright and format
• 8c335bc9 - raise low_k to 100MeV
• ec7477e5 - rebase and fix bugs in LambdaLL filtering and hlt1_filter

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added 1 commit

• b4f576b7 - Fixed formatting

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Done a test for rate estimation with 10k events of hlt1-filtered MC as input. Assuming hlt2 input rate is 1MHz, rate = N/10k * 1MHz, where N - number of events passed selection.

line Hlt2IFT_Femtoscopy_XXX	rate (Hz)
InclLambdaLL	191800
InclOmegaLLL	2400
InclXiLLL	6300
---	---
LambdaP	13500
LambdaP_lowK	<100
LambdaLambda	300
LambdaLambda_lowK	<100
XiP	300
XiP_lowK	<100
XiLambda	<100
XiLambda_lowK	<100
XiXi	<100
OmegaP	100
OmegaP_lowK	<100
OmegaLambda	<100
OmegaXi	<100
OmegaOmega	<100
---	---
DpP	700
DzP	800
DpLambda	<100
DzLambda	100
DpXi	<100
DzXi	<100
DpOmega	<100
DzOmega	<100
---	---
LcP	100
LcLambda	<100
LcXi	<100
LcOmega	<100
XicpP	<100
XiczP	<100
XicpLambda	<100
XiczLambda	<100
XicpXi	<100
XiczXi	<100

So, looking on the rate I may suggest following prescales:

line Hlt2IFT_Femtoscopy_XXX	Prescale suggested
InclLambdaLL	10^{-4} or even 10^{-5}
InclOmegaLLL	10^{-3} or even 10^{-2}
InclXiLLL	10^{-3}
LambdaP	10^{-3} or even 10^{-4}
LambdaLambda	10^{-1}
XiP	10^{-1}
DpP	10^{-1}
DzP	10^{-1}

and add low_k variants for DpP and DzP lines.

added 2 commits

• f67a08ce - add DP lowK lines
• f59ab567 - prescales added

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added 1 commit

• ad5f6e5b - fixes

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mentioned in merge request !2202 (merged)

marked the checklist item Add lines for pairs of different hyperons (e.g. \Lambda-\Xi^-) as completed

marked the checklist item Add lines for \Lambda-D^{0,\pm}_{(s)} and \Lambda-\Lambda^{\pm}_c as completed

marked the checklist item Add configuration with full-rate low-k lines and prescaled high-k lines** as completed

marked the checklist item Determine rates and prescales as completed

marked this merge request as ready

assigned to @frodrigu

/ci-test

added ci-test-triggered label

• [2023-05-18 12:28] Validation started with lhcb-master-mr#7903

added hlt2-throughput-increased label

unassigned @frodrigu

added 55 commits

• ad5f6e5b...f126bffb - 39 commits from branch master
• 62d9f395 - Add particle makers for femtoscopy lines
• 99401248 - Add hyperon femtoscopy lines
• 06171097 - Add configurable k* maximum and Hlt1 filter to femtoscopy lines
• e8df6a32 - add Xi-Lambda, Omega-Lambda and Omega-Xi lines, fix Xim->Omegam in few names
• 1d849f69 - merge AB and AB~ lines into one
• 332e91c0 - add charm-hyperon lines with Lambda_c+, Xi_c+/0, D0/+
• b69ceb2d - change Lambda builder to common in inclusive signle Lambda line
• 852c3859 - add lowK line variant for pp, Lambdap, Xip, Omegap, LambdaLambda, XiLambda
• c97b971f - fixes
• ac7ee4d1 - copyright and format
• 77b85e09 - raise low_k to 100MeV
• 0d2bad87 - rebase and fix bugs in LambdaLL filtering and hlt1_filter
• 8d06fef4 - Fixed formatting
• 7e93fd6f - add DP lowK lines
• 6fb3bfa8 - prescales added
• 13b19a65 - fixes

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added 1 commit

• 870da08e - Switch to algorithms_thor

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added 1 commit

• 77388deb - Add L02PPi HLT1 filter to femtoscopy lines

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added 1 commit

• 53961d0d - Fixed formatting

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resolved all threads

@mzdybal This is ready for testing again.

• [2023-06-02 09:55] Validation started with lhcb-master-mr#8122

removed hlt2-throughput-increased label

added selection label

added hlt2 label

@thboettc are these lines intended for pp and heavy ion collisions?

changed the description

assigned to @rmatev

mentioned in issue #594 (closed)

added June-2023-data label

resolved all threads

@mvesteri @rmatev Is there anything preventing this from being merged?

resolved all threads

mentioned in merge request !2366 (merged)

added 1 commit

• 794595de - Add femtoscopy lines to IFT __init__

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Thanks to @oboenteg's prompting, I realized I didn't add these lines to the IFT __init__ file, so we'll need to rerun the CI tests @yagao. We expect to see the same failures as !2366 (merged)

/ci-test

• [2023-06-14 14:32] Validation started with lhcb-master-mr#8244

added WIP dependency label