# Presentation: 658831

## DØ Physics - Status and Plans

**Boaz Klima**
**Fermilab**
**Collaboration Meeting****                       **
**Feb. 15, 2002**

##                        Outline

- Past
- Organizational changes
- Getting off the ground (“ready for Moriond”)
- Object ID certification
- Present
- Assessment of the October plan
- What might be ready for Moriond
- What’s next
- Near future (summer confs)
- Longer future
- Even longer future

- Boaz Klima

- Collab. Meeting - 2/15/02

##                     Bottom Line

- Tremendous progress made over the last several months
- Major accomplishments; seeds for future
- We are beginning to see signals of the physics we’re interested in
- The next several months are going to be very exciting
- After that it might get too exciting...
-                                            ...but, still lots to do

- Boaz Klima

- Collab. Meeting - 2/15/02

## Thanks, disclaimer, WWW

- Thanks to all convenors for their work and help in assembling this talk
- All mistakes are mine!
- More info, being updated on a regular basis, can be found linked from each group/board web page(s) – all linked from the Physics main web page at
- _[http://www-d0.fnal.gov/Run2Physics/home.html](http://www-d0.fnal.gov/Run2Physics/home.html)_
- This talk is linked from that page, or go directly to
- _[http://www-d0.fnal.gov/Run2Physics/d0_private/talks/Collaboration_Meeting_021502.pdf](http://www-d0.fnal.gov/Run2Physics/d0_private/talks/Collaboration_Meeting_021502.pdf)_

- Boaz Klima

- Collab. Meeting - 2/15/02

## Organizational Changes (July ‘01)

-  All the new boards/groups have been functioning very well and
-  already contributed significantly to the operation of the experiment
-  and the analysis of its data
-  The new (and old) convenors and chairs performed very well both individually and collectively

- Added Trigger Board (TB)
- Added Offline Resources Board (ORB)
- Added Jet Energy Scale (JES) group
- Split HiT into Higgs and Top Physics groups
- Appointed many new convenors/chairs

- Boaz Klima

- Collab. Meeting - 2/15/02

##          Getting off the ground

- Sometimes called “getting ready for Moriond”
- Still lots to do before we get to Physics
- Improve accelerator performance
- Complete detector + electronics + DAQ + trigger
- Understand what they do – Commissioning/Integration
- Debug, calibrate, align, develop algorithms (RECO, TTF, DB, ...)
- Everything else that nobody wants to talk about
- Even more to do to become competitive
- Really improve accelerator performance
- Efficient/smart data taking
- Online (&offline) quality control
- Smooth and timely offline processing
- Efficient/easy data access (SAM, DØRACE)
- We already made a lot of progress – much more is needed
- We have to do all of this in parallel !

- Boaz Klima

- Collab. Meeting - 2/15/02

##          Object ID Certification

- First time done in DØ’s long history
- Introduced a new formal process
- Approval by ID group
- Certification by godparent
- Given a version number
- Certified/standardized ID definitions are being (to be) used (from now on) by all Physics groups
- What’s available? object definition(s), trigger efficiency, fake rate, performance plots, energy scale, resolution, MC vs Data, macros,...
- First step in a long journey (only version 1 is out now)
- Object IDs will be improved steadily as we get better understanding of our data, more detectors and tools in place, smarter/more sophisticated ideas,...
- Help in pursuing better IDs at all levels is needed
- Major step forward! Kudos to all participants + convenors + godparents

- Boaz Klima

- Collab. Meeting - 2/15/02

##                 October ’01 Plan

- Presented to the collaboration and distributed around at the beginning of October 2001
- Goals
- Present first results at Moriond, showing that the detector is working and we are on track for physics results in 2002
-     (first physics results at the summer confs, based on ~200pb-1)
- “Hidden agenda” – long learning curve, full integration (not only hardware!), feedback, morale, PR,...
- Means/How
- Monitor operations with the aim of identifying and addressing problems, and increasing our efficiency
- Make/monitor progress on reconstruction and analysis tools
- Establish Certification of Object IDs
- Need stable data-taking period (core trigger list unchanged)
- Time scale is VERY short!

- Boaz Klima

- Collab. Meeting - 2/15/02

## 
October 15
W/Z -> e signal
reporting and oversight established
establish a plan for analysis infrastructure (e.g. event display, luminosity tools) and for farm operations 
    during shutdown
November 1
W/Z ->  signal
luminosity available by run and trigger
November 15
J/  -> signalfor calibration 
Operations:
20 Hz to tape
Examines,  online monitoring of data quality
production offline capable of keeping up with data taking & plans to cope with increases
use new tape handling system
Last date for major changes to Dec 1 software release

- October 15
- W/Z -> e signal
- reporting and oversight established
- establish a plan for analysis infrastructure (e.g. event display, luminosity tools) and for farm operations
-     during shutdown
- November 1
- W/Z ->  signal
- luminosity available by run and trigger
- November 15
- J/  -> signalfor calibration
- Operations:
- 20 Hz to tape
- Examines,  online monitoring of data quality
- production offline capable of keeping up with data taking & plans to cope with increases
- use new tape handling system
- Last date for major changes to Dec 1 software release

**                ****Detailed Plan (1)**

- made tremendous progress understanding data, identifying problems and needs, and getting ready once trigger in place

- Boaz Klima

- Collab. Meeting - 2/15/02

## 
December 1
start stable global running; freeze global trigger list (L1 and L3)
Establish EM scale
b tagging with muons
P10.x software release (= final reco code for Moriond)
January 10
certified e, mu physics objects
certified tracks
certified jet physics objects and certified JES
February 1
b tagging with sec vtx or IP
complete data taking for Moriond
February 8
complete data processing for Moriond     
(re-processing with p10.14 by today?)
March 1
Plots/results ready for approval

- December 1
- start stable global running; freeze global trigger list (L1 and L3)
- Establish EM scale
- b tagging with muons
- P10.x software release (= final reco code for Moriond)
- January 10
- certified e, mu physics objects
- certified tracks
- certified jet physics objects and certified JES
- February 1
- b tagging with sec vtx or IP
- complete data taking for Moriond
- February 8
- complete data processing for Moriond
- (re-processing with p10.14 by today?)
- March 1
- Plots/results ready for approval

**                ****Detailed Plan (2)**

- Boaz Klima

- Collab. Meeting - 2/15/02

##                 Did it work?

- Yes! We have accomplished a lot.              We learned a lot.
-     Tremendous progress!
- But...
- Lessons for the future (motherhood?)
- Need better understanding of the problems, what’s realistic etc (e.g. expecting W/Z ->  signal on Nov. 1)
- Need to get everybody on board
- Need to better coordinate communication and feedback mechanism between hardware/software/analysis
- Management at all levels needs monitoring of progress, identifying problems along the way and solving them quickly
- We all need to pay attention to details
- Are we better off today than 4 months ago
- Definitely YES
- We are further ahead on every frontier
- We know how to correct most (all?) of our mistakes

- Boaz Klima

- Collab. Meeting - 2/15/02

##          Where’s the beef?

- Or, where are we today wrt Physics?
- We can show that
- Almost all detectors are operational
- Most of those produce data as (or close to what’s) expected
- In most cases we understand what needs to be studied/done/investigated to get us to the promised land
- We see almost all obvious objects (see “Latest Run 2 Results”)
- W/Z         e + /e
- Z         
- J/         F & C
- KS            
-  Jets
- ET
- W/Z + jets
- b (tag)
- b (SMT/IP tag) (?)
- J/        ee (?)

- Boaz Klima

- Collab. Meeting - 2/15/02

##                         Moriond

-  What will we (may) be able to show at Moriond?
- Disclaimer
- Caveats
- ...

- Boaz Klima

- Collab. Meeting - 2/15/02

-                                                    2-jet event display
-                                                     3-jet event display

**                     ****QCD Physics**

-  Energy Scale Corrections
-    v1.1 applied
-  No Trigger or Reco
-   (in)efficiencies applied

**  ****2-jet event**
-  ETjet1~230GeV
-  ETjet2~190GeV

**  ****3-jet event**
-  ETjet1~310GeV
-  ETjet2~240GeV
-  ETjet3~110GeV
-  ET~8GeV

- Jet ET x-section

- Dijet invariant mass

- Boaz Klima

- Collab. Meeting - 2/15/02

## Particles                                   b tagging

- KS           

- J/

**                        ****b**** Physics**

- CC

- FF

- All

- FF

- Boaz Klima

- Collab. Meeting - 2/15/02

-         W        e        ee

**             ****WZ/Higgs/Top**** Physics**

- W(    e) + jets

- Boaz Klima

- Collab. Meeting - 2/15/02

**             ****WZ/Higgs/Top**** Physics**

- Using certified/standard
-  Object ID cuts
- Nice, but...

-         ee

-    Tighter cuts            with Global tracks         with SMT tracks

- Boaz Klima

- Collab. Meeting - 2/15/02

- W        e

**             ****WZ/Higgs/Top**** Physics**

- Using certified ID cuts

-            Using SMT tracks

-     no jets

-        w/ jets

-             Signal
-    Background

- Boaz Klima

- Collab. Meeting - 2/15/02

- Higgs candidate event          Top candidate event

**           ****WZ/Higgs/Top**** Physics**

-  pTe~70.0GeV; ET~25.3GeV
-  MT(e,)~63.5 GeV
-  ETjet1~74.4GeV; ETjet2~57.5GeV
-  ETjet3>49.3GeV; ETjet4>23.0GeV

- Boaz Klima

- Collab. Meeting - 2/15/02

- Triple-lepton (eee) candidate        W+candidate event

**            ****New Phenomena**** Physics**

-  Potential Distributions
-  Searches - ED, LQ,...
-  Performance - ET,...

| e1 | e2 | e3 |
| --- | --- | --- |
| pT = 15.9
 = 0.43
 = 5.42
EMfrac = 1
HMx8 = 9.74
iso = 0.0052
id = 10 | pT = 12.5
 = -1.97
 = 2.8
EMfrac = 1.01
HMx8 = 11.4
iso = -0.027
id = -11 | pT =  11.9
 = 1.06 
 = 5.72
EMfrac = 1
HMx8 = 4.46
iso = 0.052
id = 10 |
| me1e2 = 51.1 | me1e3 = 9.74 | me2e3 = 57.8 |

- Boaz Klima

- Collab. Meeting - 2/15/02

##    Run 1 analysis is going, and going...

- (Still) Jianming’s Report
- DØ has published (or submitted) 116 papers so far
- 2 kT papers published this week (PRD & PLB)
- 2 drafts are in Collaboration review
- 2 drafts are in Style review (     Collaboration)
- 5 analyses are in
-     Physics/EB review
- 8 analyses in
-     progress
- Done in 2002?

- Already
- out-of-date

- Boaz Klima

- Collab. Meeting - 2/15/02

##  What happened during the collaboration meetings?

- I attended (too) many ID/Physics meetings
- Negative
- Rooms too small for most meetings (maybe this is positive?)
- Rooms not air-conditioned, too hot/steamy
- Next time: Physics        WH1W, IDs         WH1W,9th Circle
- Positive
- Enormous progress
- A lot in the pipeline, many starts
- Identify needs, problems, tasks, volunteers(?)
- Excitement & “discoveries” (W – Markus, W+jets – Ia)
- Fun, fun, fun (many laughs!)
- Great! Continue as is

- Boaz Klima

- Collab. Meeting - 2/15/02

##        Where do we go from here?

- Still lots to do... (am I annoying or what?!)
- Short term
- We have to be serious about getting first Physics results out by the summer conferences
- We need a plan and a commitment
- We have to execute better
- Longer term
- Figure out where we can gain big time
- Pay careful attention to “small” effects
- Do the more challenging stuff (, b    e, NN,...)
- ...discover Higgs, SUSY, ED, BH,...

- Boaz Klima

- Collab. Meeting - 2/15/02

##          The next several months

- “Getting ready for ICHEP 2002”
- May 1
**certified object IDs (e, ********, jet, E****T****, JES,b,********)**
- June 1
**complete data taking for ICHEP**
- June 8
**complete data processing for ICHEP**
- June 15
**complete Express Stream re-processing**
- July 1
**Plots/results approved by Physics groups**
- July 8
**Rehearsal of talks**
- July 12
**EB approval ****of analysis and talks**
- July 24, 2002
**1****st**** day of ICHEP 2002 (Amsterdam)**

- Boaz Klima

- Collab. Meeting - 2/15/02

##                     Conclusions

- Still lots to do
- Tremendous progress made over the last several months
- Major accomplishments; seeds for future
- We are beginning to see signals of the physics we’re interested in
- The next several months are going to be very exciting
- After that it might get too exciting...
- Let’s get ready to produce first significant Physics results in summer 2002!

- Boaz Klima

- Collab. Meeting - 2/15/02