# Presentation: 828229

## CURRENT  STATUS  OF  MET  

*CURRENT  STATUS  OF  MET  *

***S.Abdullin***

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## Outline  

**Outline  **

- Problem : high-MET tail appeared
- in ORCA_6_2_0-made Ntuples

- Troubleshooting : ORCA or CMSIM ?

- Event  filter (patch)

- Low luminosity MET rates

- High-lumi QCD rate for 95 % eff. MET cut
- for invisible Higgs (120 GeV)

- High luminosity MET rates

- Remarks on the HF filter ...

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## Reminder : High MET Problem 

**Reminder : High MET Problem **

- 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 ?)**

**HF bug effect ?**

**No...**

- ORCA_6_2_0
- (HF bug fixed)

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## “Anomalous” Event I

**“****Anomalous” Event I**

- 

- 

- 

- 

- 

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## “Anomalous” Event II

**“****Anomalous” Event II**

- 

- 

- 

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## Single-Shooting at HF (I) 

**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),  Status of MET

- August 7, 2002

## Single-Shooting at HF (II) 

**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),  Status of MET

- August 7, 2002

## Single-Shooting ... 

**Single-********Shooting ...**** **

-  pt = 30 GeV** **

** ******** ****= 0 - 4.5**** **

****

**No pileup **

- Could be some
- confusion ...

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## ORCA or CMSIM ? 

**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 favour of CMSIM origin ... **

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

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

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## Simple(st) HF Filter  

**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),  Status of MET

- August 7, 2002

## HLT Data Filtering

**HLT Data Filtering**

**1)        0-15 *******

**Low lumi   **

** **

**High lumi  **

**94802 **

**95376 **

**P < 15GeV**

**^**

**2)       15-20 **

**52000 **

**52000 **

**        ****3 **

**51997 **

**        ****3 **

**51997 **

**3)       20-30 **

**52000 **

**52000 **

**      ****36**

**51964 **

**      ****36 **

**51964 **

**4)       30-50 **

**35804 **

**46610 **

**    ****154 **

**35650 **

**    ****198 **

**46412 **

**5)       50-80 **

**146141 **

**149250 **

**  ****1337 **

**144804 **

**  ****1336 **

**147884 **

**6)       80-120 **

**133497 **

**99999 **

**  ****1605 **

**131892 **

**  ****1207 **

**98792 **

**7)     120-170 **

**147495 **

**149495 **

**  ****2204 **

**145291 **

**  ****2230 **

**147265 **

**8)     170-230 **

** **** ****2000****

**      ****27 **

**  ****1973 **

**      ****27 **

**  ****1973 **

**9)     230-300  **

**19999 **

**19889 **

**    ****285 **

**19714 **

**    ****283 **

**19616 **

**10)    300-380 **

**  ****2259 **

**10000 **

**      ****31 **

**  ****2228 **

**    ****107 **

**  ****9883 **

**11)    380-470 **

**10000 **

**10000 **

**      ****75 **

**  ****9925 **

**      ****75 **

**  ****9925 **

**13)    470-600**

**  ****6650 **

**10000 **

**      ****33 **

**  ****6617 **

**      ****51 **

**  ****9949 **

**13)    600-800 **

**  ****2000 **

**  ****2000 **

**        ****8 **

**  ****1992 **

**        ****8 **

**  ****1992 **

**14)    800-1000 **

**  ****2000 **

**  ****2000 **

**      ****10 **

**  ****1990 **

**      ****10 **

**  ****1990 **

**15)  1000-1400 **

**  ****2000 **

**  ****2000 **

**        ****9 **

**  ****1991 **

**        ****9 **

**  ****1991 **

**16)  1400-1800 **

**  ****1900 **

**  ****2000 **

**        ****8 **

**  ****1892 **

**        ****9 **

**  ****1991 **

**17)  1800-2200 **

**  ****2000 **

**  ****2000 **

**        ****4 **

**  ****1996 **

**        ****4 **

**  ****1996 **

**18)  2200-2600 **

**  ****2000 **

**  ****1900 **

**        ****2 **

**  ****1998 **

** **

**  ****1898**

**16)  2600-3000 **

**  ****2000 **

**  ****2000 **

**17)  3000-3500 **

**  ****2000 **

**  ****1800 **

**18)  3500-4000 **

**  ****2000 **

**  ****2000 **

** **** ****2000****** **

**        ****2 **

**Filtered out**** **

**Filtered out**** **

** **********Additional  amout  is being digitized**

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## Filtering out the Tails ...

**Filtering out the Tails ...**

- without filter

- with** **filter** **

**Low lumi**

**L1** **MET**

**L2** **MET**

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## MET @ Low Luminosity

**MET @ Low Luminosity**

- In 2002/015  (low lumi) :

- L1 MET rate =
- L2 MET rate = 1 kHZ
- at ~ 65 GeV

- ~

- Now  at ~ 70-75 GeV

-    ~15 Hz event
-  from 15-20 GeV
-  (small statistics)

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## MET @ High Luminosity

**MET @ High Luminosity**

-  12, 40 Hz  events
-   from 30-50 GeV

-  50 Hz  event
-  from 0-15 GeV

- Low statistics !

- HF filter is not
- a panacea,
- unfortunately ...

- S.Abdullin (UMD),  Status of MET

- August 7, 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),  Status of MET

- August 7, 2002

## Invisible Higgs @ High Lumi (II) 

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

-   **no comments ...**

- S.Abdullin (UMD),  Status of MET

- August 7, 2002

## Remarks on HF Filter 

**Remarks on HF Filter **

**Should be :**
**400)*400) / 100**

**Pal  :  changed  packing    **
**IP1 = vert + ist  ****x**** 100 + idaug****  x**** ****400**
**cited problems in PAW with I*4**
**(to pack more that  4,000,000)**

- no daughters – no difference
- for stable particles (ist=1)

- above packing doesn’t work
- for  ist > 3 ... (often)

-  a panacea !!!

- this filter is not

- S.Abdullin (UMD),  Status of MET

- August 7, 2002