# Presentation: 076997

## DAQ TDR "Patchwork"

- S. Abdullin

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Preamble

**SUSY Trigger : Preamble**

**Low luminosity  study** :  CMS  IN-2002/036

- Given 2 kHz @ L1 and 3Hz @ L2

- 6 essential  combinations  of  L1 and L2 channels (out of  18)

- R-parity violation scenario yields marginal  efficiency @ L2

- Probing points studied at the Tevatron II  reach limit

- ( along squark isomass curve of       400 GeV )

- ~

- ~

- Hybrid genetic algorithm written for cuts optimization

**High luminosity **

- Probing points chosen at mass scale of       2 TeV

- http://cmsdoc.cern.ch/~abdullin/events/talks/acat2002.pdf

- ~

- ~

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Probing Points

**SUSY Trigger : Probing Points**

*low-luminosity  points*

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : R-Parity Violation

**SUSY Trigger : R-Parity Violation**

**Most challenging scenario (?)**

- 

- 

- 

- 

- 3 quarks

- 6  additional  jets,  not necessarily soft :

- 

- 

- 

- 

- mass

- ~

- ~

- 300-450 GeV

**ISAJET 7.58 – ISAWIG 1.104 – HERWIG 6.301**

**Points **

**7R**

**8R**

**9R**

- Missing ET shrinks, still some amount remains

- copious b-jets, W/Z, taus and neutralinos

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Many Jets Expected ...  

**SUSY Trigger : Many Jets Expected ...  **

- gluino branching ratio
-              chart

- squarks yield less jets

- more jets if
- squarks decay
- via gluino

**9R**

**9**

**7**

- similar to point

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Event Display

**SUSY Trigger : Event Display**

**Point**

**9R**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Jet # @ L2

**SUSY Trigger : Jet # @ L2**

**7**

**8**

**9**

**7R**

**8R**

**9R**

- E     > 50 GeV

** ****T**

** ****jet**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Missing ET @ L2

**SUSY Trigger : Missing ET @ L2**

**7**

**8**

**9**

**7R**

**8R**

**9R**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Data Samples

**6 mSUGRA samples  **

- high-lumi jet energy corrections

- spring 2002 production

-  2000 events each

**3 SM backgrounds**

- spring 2002 production (high lumi)

- QCD (with HF filter)

- 1,050,000 events

- Wj (W   *  l* )

- ~

- ~

- 150,000 ev.

- t t

- ~

- ~

- 46,000 ev.

- -

- high-lumi energy corrections from Andrei Krokhotine

- autumn 2001 production (low lumi, rescaled)

**SUSY Trigger : Data Samples**

- ~

- ~

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : L1 and L2 cuts 

**SUSY Trigger : L1 and L2 cuts **

**L1 cuts :  **

- MET || J1 || J2 || J3 || J4 || (J1 && MET)

**L2 cuts :**

- {(J1 && MET) || (J2 && MET) || (J3 && MET) || (J4 && MET)

- || Meff  || MET }   ||

- {(J1 && MET) || (J2 && MET) || (J3 && MET) || (J4 && MET)

- {

- || Meff  || MET }  && (J1,J2)
- }

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## *

**SUSY Trigger : Hybrid GA  (I)**

**  **

- Fixed-size population (100-1000 individuals)

**“****Society of individuals   **

- Each individual has a unique combination of genes (cuts) P

- Hierarchy is established according to evaluation function F(P)

- Maximal  signal  efficiency  S(P)

- Rate R(P) is close to R

- max

**Genetic Algorithm**

*****

*****

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : Hybrid GA (II)

**SUSY Trigger : Hybrid GA (II)**

**Act of Creation (random)   **

**  **

- random (“uniform”) crossover of genes between

**Breeding**

- parents, offspring is added, parents retained;

- probability to participate ~ place in the hierarchy.

- random change by one bit (up/down) of a random

**Mutation**

- gene; mutation probability is significant (10-20 %)

- and independent from hierarchy;

- Initial individual retained, the result of mutation added.

- removal of clones (repl. with newly created individ.);

**Selection**

- descending ordering according to the evaluation func.;

- removal of redundant individuals;

- separate “Top 10” list update (if any);

- complete random renewal of the population, except

**Cataclysmic**

- the best individual; “Top 10” is not affected also.

- applied in case of stagnation (50-100 generations)

- a few times.

**update**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : L1 Results

**SUSY Trigger : L1 Results**

**7**

**8**

**9**

**7R**

**8R**

**9R**

- QCD

- W j

- t t

- -

- J1&&MET

- Signal efficiency (%)

- Rate (kHz)

- J3

- 90   80

- 90

- 89 (89)

**90** (59)

- 97 (97)

**98** (72)

- 88 (88)

**92** (62)

- 89 (89)

**100** (99)

- 84 (84)

**100** (100)

- 70 (70)

**99** (97)

- 1.53

**1.94** (0.45)

- -

- -

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : L2 Results

**SUSY Trigger : L2 Results**

**7**

**8**

**9**

**7R**

**8R**

**9R**

- QCD

- W j

- t t

- -

- MET

- Signal efficiency w.r.t L1 (%)

- Rate (Hz)

- J4

- 170

- 150

- 93 (93)

**95** (20)

- 92 (92)

**94** (29)

- 79 (79)

**83** (31)

- 70 (70)

**90** (76)

- 58 (58)

**89 **(78)

- 42 (42)

**65** (53)

- 1.23

**2.79** (1.60)

- 0.11

- 0.22

**3.12**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## SUSY Trigger : L1+L2 Combined

**SUSY Trigger : L1+L2 Combined**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Reminder

**HF Bugfix : Reminder**

- Problem at high MET
- in new Ntuples

**Pt=80-120, 133497 ev (“bt02”)**

**Pt=50-80, 2000 ev**

**Pt=120-170, 2000 ev **

**Pt=230-300, 10000 ev **

**Pt=170-230, 2000 ev **

**Pt=170-230, 2000 ev **

**Previous production (May )**

- ORCA_6_2_0
- HF bug fixed :

- scale and position
-      correction

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix :     Event (e.g.) 

**HF Bugfix :     Event (e.g.) **

- 

- 

- 

- 

- 

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Single-Shooting at HF (I) 

**HF Bugfix : Single-********Shooting at HF (I)**** **

**E** **rec**

**E** **rec**

**E** **rec**

**E** **rec**

**30 GeV**

**pt =10 GeV**

**L1**

**L1**

**L2**

**L2**

** ******** ****= 3.88-3.92**** **

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Single-Shooting at HF (II) 

**HF Bugfix : Single-********Shooting at HF (II)**** **

** ******** ****= 3.88-3.92**** **

**E** **rec**

**E** **rec**

**E** **rec**

**E** **rec**

**100 GeV**

**40 GeV**

**L1**

**L1**

**L2**

**L2**

**E ~ 1 TeV ...**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Single-Shooting ... 

**HF Bugfix : Single-********Shooting ...**** **

-  pt = 30 GeV** **

** ******** ****= 0 - 4.5 **

****

**No pileup **

- E > 1 TeV

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : ORCA or CMSIM ? 

**HF Bugfix : ORCA or CMSIM ? **

**  ****Event-by-event analysis (single pions) **

- Printout of SimHits at the “entrance”
- of ORCA (just after GEANT gfhits) : too much !

- All steps of the signal evaluation in ORCA
- followed closely (printed) :
- what comes from fz file is treated properly

**  ****Evidence in favor of CMSIM origin ... **

- Printout of RecHits from Ntuples :
- both HF layers contain too high signal,
- transverse profile (eta-phi) look OK ...

**  ****Finally CMSIM tests showed problems with**
**               ****particles above 1 TeV ... **

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Simple(st) HF Filter  

**HF Bugfix : Simple(st) HF Filter****  **

**       ****Reject those events with at least one**
**   ****stable particle with E > 1 TeV pointing to HF**
** ****(signal/trigger event particles are available ...)****  **

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Filtering out the Tails ...

**HF Bugfix : Filtering out the Tails ...**

- without filter

- with** **filter** **

**Low lumi**

**L1** **MET**

**L2** **MET**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : HLT Data Filtering

**HF Bugfix : HLT Data Filtering**

**  ****Filtering of the signal events  :**
**~ 0.8 % of events filtered out   **

**  ****Mostly in pt = 50-80-120-170-230 GeV bins **

**  ****More ~ 0.06 % of events rejected due to**
**in-time min.bias events filtering :         **
**        ****(recycled) 10 events out of ~200,000 events **

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Bringing Back Events ... 

**HF Bugfix : Bringing Back Events ... **

**  ****Can we recuperate those (filtered out) events ?  **

**  “****Inversed” HF filter made for CMKIN to produce**
**   ****only events with particles above 1 GeV in HF **

**  ****Approximately the same amount of events**
**           ****was produced in ****each pt bin****  **

**  ****CMSIM version with fixed HF bug was used**
**  ****to process these events   **

**  “****Auxiliary” Ntuples were produced (~ 5,500 ev) **

**  ****Yes**** (to some extent : not exactly those rejected)**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## HF Bugfix : Effect of “Recuperattion”

**HF Bugfix : Effect of “Recuperattion”**

- Low lumi

- High lumi

** ****No**** ****difference**** ****...**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## BX Weights : on/off

**BX Weights : on/off**

- High lumi

- Not full statistics ...

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## Radout Occupancy @ High Lumi

**Radout Occupancy @ High Lumi**

-  ORCA 6_2_0

-  10,000 high-lumi events

-  HF : long fiber (Layer 0)

- 10 %

- 1 %

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## Muons in HB 

**Muons in HB **

****

**bit  window ?**

-   With current sampling factors ...

-  ~ 0** **

-  ~ 0** **

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## Invisible Higgs @ High Lumi (I) 

**Invisible Higgs @ High Lumi (I) **

**H(120)     invisible **

** ****BCID effect  ****?**

- All known tricks  L2     L1
-          except  BCID

-   L1 granularity
- and LSB=1 GeV

- Calo scope + 
-       (in-time)

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## Invisible Higgs @ High Lumi (II) 

**Invisible Higgs @ High Lumi (II) **

** ****Part of the full HLT stat. **

**L1  granularity**
**L1  LSB = 1 GeV**
**L1  8/10 bit **
**      ****dynamic range**

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## Various Jet Species @ Low/High Lumi 

**Various Jet Species @ Low/High Lumi **

- Low lumi

- High lumi

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002

## High-mass SUSY points considered   

**High-mass SUSY points considered **

**SUMMARY**

**A few simple cuts do the job   **

**Cuts are optimised with a hybrid GA   **

**Both with/without R-parity violation   **

**Efficiency is high enough  **

**HF bugs are fixed **

**ORCA (position and scale)  **

**CMSIM (bad extrapolation for E>1 TeV)  **

**Event filter(s) applied  **

**Full statistics recuperated  **

**A number of other items considered/calculated ... **

- S.Abdullin (UMD)                                       DAQ TDR "Patchwork"

- September 24, 2002