babar update and plans david b. macfarlane slac annual program review june 14, 2005
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![Page 1: BABAR Update and Plans David B. MacFarlane SLAC Annual Program Review June 14, 2005](https://reader031.vdocument.in/reader031/viewer/2022013011/56649d6c5503460f94a4be2c/html5/thumbnails/1.jpg)
BABAR Update and Plans
David B. MacFarlaneSLAC Annual Program
ReviewJune 14, 2005
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June 14, 2005 BABAR Update and Plans 2
INFN, Perugia & UnivINFN, Roma & Univ "La Sapienza"INFN, Torino & UnivINFN, Trieste & Univ
The Netherlands [1/4]NIKHEF, Amsterdam
Norway [1/3]U of Bergen
Russia [1/13]Budker Institute, Novosibirsk
Spain [2/3]IFAE-BarcelonaIFIC-Valencia
United Kingdom [11/75]U of BirminghamU of BristolBrunel UU of EdinburghU of LiverpoolImperial CollegeQueen Mary , U of LondonU of London, Royal Holloway U of ManchesterRutherford Appleton LaboratoryU of Warwick
USA[38/311]
California Institute of Technology
UC, IrvineUC, Los AngelesUC, RiversideUC, San DiegoUC, Santa BarbaraUC, Santa CruzU of CincinnatiU of ColoradoColorado StateHarvard UU of IowaIowa State ULBNLLLNLU of LouisvilleU of MarylandU of Massachusetts, AmherstMITU of MississippiMount Holyoke CollegeSUNY, AlbanyU of Notre DameOhio State UU of OregonU of PennsylvaniaPrairie View A&M UPrinceton USLACU of South Carolina
Stanford UU of TennesseeU of Texas at AustinU of Texas at DallasVanderbiltU of WisconsinYale
Canada [4/24]U of British ColumbiaMcGill UU de MontréalU of Victoria
China [1/5]Inst. of High Energy Physics,
Beijing
France [5/53]LAPP, AnnecyLAL Orsay
The BABAR Collaboration
11 Countries 80 Institutions623 Physicists
LPNHE des Universités Paris VI et VII
Ecole Polytechnique, Laboratoire Leprince-Ringuet
CEA, DAPNIA, CE-Saclay
Germany [5/24]Ruhr U BochumU DortmundTechnische U DresdenU HeidelbergU Rostock
Italy[12/99]
INFN, BariINFN, FerraraLab. Nazionali di Frascati dell'
INFNINFN, Genova & UnivINFN, Milano & UnivINFN, Napoli & UnivINFN, Padova & UnivINFN, Pisa & Univ & Scuola
Normale Superiore
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June 14, 2005 BABAR Update and Plans 3
BABAR Detector
DIRC PID)144 quartz
bars11000 PMs
1.5T solenoid
EMC6580 CsI(Tl) crystals
Drift Chamber40 layers
Instrumented Flux Return
iron / RPCs or LSTs (muon / neutral hadrons)
Silicon Vertex Tracker
5 layers, double sided strips
e
(3.1GeV)
e (9GeV)
Collaboration founded in 1993Detector commissioned in 1999
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June 14, 2005 BABAR Update and Plans 4
DCH electronics upgrade Motivation:
o Reduce deadtime due to serialization and shipping of data from DIOM to ROM
Upgrade in two steps:o Phase 1 (summer 2004)
• Ship only 1/2 waveform information (3216 bytes) from frontends
• No change observed with datao Phase 2 (Oct 2005)
• Larger FPGA for feature extraction before transmission hardware change
• New boards in production
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June 14, 2005 BABAR Update and Plans 5
IFR upgrade with LSTs
Bottom & top sextants installed summer 2004Remaining sextants delayed until summer 2006
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June 14, 2005 BABAR Update and Plans 6
LST installation summer 2004
Bottom sextant: Aug 15-Sep 4
Top sextant: Sep 16-29
z-strips
LST Modules
Brass
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June 14, 2005 BABAR Update and Plans 7
LSTs are fully operationalwire holders
LST sextants
Efficiency curves from Run 5 data
RPC sextants
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June 14, 2005 BABAR Update and Plans 8
Weak Interaction in Standard Model
Apex at
,
0 0B - B mixing
) B and ( b c
( ) b u
0,1 0,0
1
2
3
Unitarity Triangle as a summary of Standard Model
b physics
us ubud
cs cbcd
ts tbtd
V V VV V V V
V V V
+ phases
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June 14, 2005 BABAR Update and Plans 9
CP violation in B decays
2
wk sti iA e e
1AB f CPV through
interference of decay amplitudes
stwk
( ) ( )f or 0 and 0
B f B f
2
1 2( ) wk sti iB f A A e e
st
B f
1A
2A
wkB fwk
2
1 2( ) wk sti iB f A A e e
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June 14, 2005 BABAR Update and Plans 10
0 0/ SCPV in B J K
Interference of b c tree decay with mixing
CPV in charmonium modes
0- 0B Bmixing ( )b u
,
)B and ( b c 0,1 0,0
1
2
3
0Bb
db
d t
tWW 0B
0Bc
b
d
W/J
d
c
s 0K
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June 14, 2005 BABAR Update and Plans 11
Measuring time-dependent CP asymmetries
e-e
z
tagB 4S
Start the clock
z 1z
tc
t is a signed quantity
(4 ) 0.56S
recB
Exclusive B meson and vertex reconstruction
Exclusive B meson and vertex reconstruction
/J
0SK
Tag vertex reconstruction
Tag vertex reconstruction
FlavorTaggingFlavor
Tagging
K
Tagging performance: Q = 30.5%
~1 ps 170 m
~1.6 ps 250 mt
B
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June 14, 2005 BABAR Update and Plans 12
sin2 results from charmonium modes
BABAR PUB-04/038Update for ICHEP04
sin2 0 722 0.040 0.023/ 0.950 0.031 0.013
.A A
0( ) ( odd) modesScc K CP
1205 on peak or 227 pairs7730 CP events (tagged signal)
f b M BBLimit on direct CPV
BBAABBARARBBAABBARAR
0
0
( ) +( )
S
L
cc Kcc K
0( ) ( even) modesLcc K CP
BBAABBARARBBAABBARAR
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June 14, 2005 BABAR Update and Plans 13
BABAR & Belle physics results
Journal Papers BABAR Belle
<2003 32 54
2003 39 28
2004 52 35
June 2005 26 23
Total 149 140
Conference Contributions
BABAR Belle
Papers submitted to ICHEP04
72 63
Abstracts submitted to LP05
75 73
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June 14, 2005 BABAR Update and Plans 14
BABAR publication history
0
5
10
15
20
25
30
35
40
45
Ja
n-0
3
Ap
r-0
3
Ju
l-0
3
Oc
t-0
3
Ja
n-0
4
Ap
r-0
4
Ju
l-0
4
Oc
t-0
4
Ja
n-0
5
Ap
r-0
5
PubConfNote
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June 14, 2005 BABAR Update and Plans 15
Even our backgrounds yield physics!
e- side
z profile
DCH Wall
Support Tube
SVT
Ta
TaInner detector tomography
with pKs vertices from elctro- and hadro-production events
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June 14, 2005 BABAR Update and Plans 16
Searches for the (1540) pentaquark
e-
Be
KS sidebands
KS signal
(1540)
HERMES: possible acceptance loss at low mass (PID on proton > 4.1 GeV/c)
BABAR is also a tau, charm, ISR, and Factory
Object lesson: with data in hand, clever analysis ideas will
emerge
BBAABBARARBBAABBARAR
244 fb-1
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June 14, 2005 BABAR Update and Plans 17
,
0 0B - B mixing
)B and ( b c
( )b u
0,1 0,0
/ub cbV V
cbV
1
2
3
Progress on b quark couplings
/ tstdV V
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June 14, 2005 BABAR Update and Plans 18
Search for B → ,
0
Simultaneous fi t to, ,B 6 1.2 10 (90% ) BF CL
BBAABBARARBBAABBARAR 211 pairs M BB 211 pairs M BB
BABAR-PUB-04/035
Penguins are starting to provide
meaningful CKM constraint
95% CL BABAR allowed region
(inside the blue arc)
with theory errorno theory error
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June 14, 2005 BABAR Update and Plans 19
Inclusive |Vub| measurements
Mx (GeV)
b callowed
b callowed
Ee (GeV)
q2
(GeV2
)
q2
(GeV2
)
endpoint
Ee vs q2 Mx vs q2
DataMC
PRELIMINARY
hep-ex/0408075 hep-ex/0408045 hep-ex/0408068
MC MC
Different approaches available to extract partial
rates
2
2
( ) 1( ) 50
ub
cb
Vb ub c V
82 fb-1
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June 14, 2005 BABAR Update and Plans 20
Vub from Breco-tagged Mx–q2 analysis
167 21 signal events
2 8q
1.7Xm hep-ex/0408045
I nclusive methods now: ( ) 11.5%ubV
Imagine what this will look like with 10x data in
2008!
82 fb-1
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June 14, 2005 BABAR Update and Plans 21
0 , , ,
CPV in B
Interference of suppressed b u tree decay with
mixing
CPV in charmless modes
0- 0B Bmixing
( )b u
,
)B and ( b c 0,1 0,0
1
2
3
0Bb
db
d t
tWW 0B
0Bub
d
W
d
u
d
3rd component:
sizable Penguin diagram
0Bu
b
d
W
d
ud
g, ,u c t
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June 14, 2005 BABAR Update and Plans 22
Very promising: B decaysExtraction of similar to , but with advantage of smaller Penguin pollution:
00 00
0
| | | |, f ound small: small
| | | | peng
A AA A
Potentially could be mixed , but is f ound to be almost pure 1
CPCP
0.080 33 0.24 0.140 03 0.18 0 09
long
long
S .
C . .
Moriond EW05
0 (232 pairs) B M BB 0 (232 pairs) B M BB
Signal: 617 52 events0.0210.978 0.014 0.029longf
BBAABBARARBBAABBARAR
BABAR PUB-05/007
0 11 90% eff CL
BABAR PUB-04/048
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June 14, 2005 BABAR Update and Plans 23
Summary of constraints on
Mirror solutions
disfavored
o
From combined , , results:
9100 10
o
indirect constraint fi t: 98 16
CKM
BABAR onlyBABAR onlyBABAR onlyBABAR only
Object lesson: with data in hand, clever analysis ideas will
emerge
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June 14, 2005 BABAR Update and Plans 24
Unexpectedly good progress on gamma!
0 , ,CP DCS: CPV in B D K D K
Interference of color-allowed and color-suppressed tree
decays
0- 0B Bmixing
( )b u
,
)B and ( b c 0,1 0,0
1
2
3
Bcb
u
W
(*)0Du
u
s(*)K
B
cb
u
W(*)0D
u
u
s (*)K
Effect depends on ratio of two diagrams
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June 14, 2005 BABAR Update and Plans 25
Dalitz plot analysis for gamma
Idea: Increase B decay interference through D decay Dalitz plot
(*)0 0 SB D K K
o
From Dalitz analysis:
3463 26
o I ndirect constraint:
858 7
Object lesson: with data in hand, clever analysis ideas will
emerge
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June 14, 2005 BABAR Update and Plans 26
UT from sin2 & indirect constraints
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June 14, 2005 BABAR Update and Plans 27
UT from CP violation measurements alone
New B Factory milestone:
Comparable UT precision from CPV
alone
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June 14, 2005 BABAR Update and Plans 28
ub
cb
V
V
Inputs:
dm
sm
B
K
sin2
Global CKM fit: 2005
Paradigm change!
Now: looking for New Physics as
correction to CKM
95% contours
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June 14, 2005 BABAR Update and Plans 29
0 0 0 , , S SCPV in B K K
Interference of suppressed b s Penguin decay with
mixing
CPV in Penguin Modes
0- 0B Bmixing ( )b u
,
)B and ( b c 0,1 0,0
1
2
3
0Bb
db
d t
tWW 0B
0Bs
b
d
W
0Kd
ss
g, ,u c t
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June 14, 2005 BABAR Update and Plans 30
Potential New Physics contributions
0B
b ss
sd
d
W
g
, ,u c t
“Internal Penguin”
0SK
0B
0SK
0 0 B K
0 0 B K
0SK
0B
b
s
s
sd d
0SK
0B
b
s
s
sd d
SUSY contribution with new phases
New physics in loops?
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June 14, 2005 BABAR Update and Plans 31
CPV in charmonium & s-penguin modes
No sign of Direct CP
3.7 between CP violation in s-
penguin vs sin2 (cc)
Charmonium
s-Penguins
Good consistency between B Factory
experiments
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June 14, 2005 BABAR Update and Plans 32
New three-body mode: B KSKSKS
88±10 signal events
PRELIMINARY
PRELIMINARY
3
3
0.380 71 0.040.320.280.34 0.050.25
S
S
KCP
K
S .
C
BABAR PUB-04/052
4S
0B0
B
0SK
0SKee
tagB
yx
Beam constrain
t
Aspen05
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June 14, 2005 BABAR Update and Plans 33
How good are Standard Model predictions?
Present SM
uncertainty
“3 sigma”Beneke, CKM05
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June 14, 2005 BABAR Update and Plans 34
PEP-II/BABAR run plan for 2005-2008 Run 5: Apr 2005 to July 31, 2006
o Down for month of October for PPS certification, Linac & PEP-II safety issues, DCH readout phase 2, LST preparations
o Run through holidays in Dec 2005
LST installation down: Aug 1 to Nov 30, 2006o Installation of remaining 4 barrel sextants of the IFRo Installation of PEP-II vacuum upgrades and rf-stationo LCLS construction and installation
Run 6: Dec 1, 2006 to Aug 31, 2007o Down for Sep-Nov 2007 for LCLS construction & installationo Run through holidays in Dec 2006
Run 7: Dec 1, 2007 to Sep 30, 2008o Run through holidays in Dec 2007
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June 14, 2005 BABAR Update and Plans 35
Projections of data sample growth
Run 5: Apr 05-Jul 06
Double data by summer 2006
4 month LST
down
Double again by Sep 2008
1 month PPS
down
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June 14, 2005 BABAR Update and Plans 36
Snapshot I: Summer 2006
Penguin Sum Comparison
0.00
0.02
0.04
0.06
0.08
0.10
0.12
Oct
-04
Jan
-05
Ap
r-0
5
Jul-0
5
Oct
-05
Jan
-06
Ap
r-0
6
Jul-0
6
Penguin Significance
0.000.501.001.502.002.503.003.504.004.505.00
Oct
-04
Jan
-05
Ap
r-0
5
Jul-0
5
Oct
-05
Jan
-06
Ap
r-0
6
Jul-0
6
Sum of all modes reaches ~5 sigma level
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June 14, 2005 BABAR Update and Plans 37
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40Ja
n-03
Jul-
03
Jan-
04
Jul-
04
Jan-
05
Jul-
05
Jan-
06
Jul-
06
Jan-
07
Jul-
07
Jan-
08
Jul-
08
Jan-
09
Jul-
09
Err
or
on
sin
e am
pli
tud
eSnapshot II: Summer 2008
K*
5 discovery region if non-SM physics is 0.30 effect
2004=240 fb-1
2008=1.1 ab-1
Golden modes reach 5
sigma level
Projections are statistical errors only; but systematic errors at few percent
level
Luminosity expectation
s:
20082004
( ) 0.30S f0KS
KS0
KS
’KS
KKKS
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June 14, 2005 BABAR Update and Plans 38
Global CKM fit: 2008
( ) 7%ubV ( ) 5%sm (sin 2 ) 0.019 o( ) 6 o( ) 10
95% contours
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June 14, 2005 BABAR Update and Plans 39
Snapshot III: Fall 2010?
Buchalla, Hiller, Nir, Razhep-ph/0503151
SM + various
New Physics
0 0SB XK
0SB XK
S
Present SM
uncertainty
“1 sigma”
Projected errors
NP in Z-Penguins
NP in gluonic-Penguins
NP in chromomagnetic operator
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June 14, 2005 BABAR Update and Plans 40
UT constraints with ~no NP assumptions
Assumption: no NP in trees [almost any NP
model]
Assumption: NP only in |F|=2 and bs[not too strong]
( ) 11.5%ubV ( ) 11.5%ubV
68% contours
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June 14, 2005 BABAR Update and Plans 41
UT constraints in 2008
Assumption: no NP in trees [almost any NP
model]
Assumption: NP only in |F|=2 and bs[not too strong]
68% contours
Significant constraint on all New Physics models in LHC era
( ) 7%ubV ( ) 7%ubV
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June 14, 2005 BABAR Update and Plans 42
Summary: Physics reach of BABAR Goal for 2005-2006: double current data set
o Delay in Run 5 can be overcome by summer 2006 with extended running period, with substantial reduction in errors on CP violation asymmetries in rare decay modes
o Error on average of Penguin modes should reach 0.06 Goal for 2007-2008: double again to ~1 ab-1
o Individual Penguin modes with errors in range 0.06-0.12o Suite of fundamental Standard Model measurements with
substantially improved levels of precision
Beyond 2008 might offer exciting opportunities if New Physics has been seen by B Factories & LHC
o Sensitivity to New Physics through rare decays, CP violation, & large data sample with a significant discovery potential
o Full program of flavor physics/CP violation measurements provide fundamental constraints on future New Physics discoveries
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Backup Slides
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June 14, 2005 BABAR Update and Plans 44
BABAR line organization
D.B. MacFarlaneSpokesperson
Technical CoordinatorW.Wisniewski
Computing CoordinatorS.Gowdy
G.Dubois-Felsmann (Deputy)
Physics Analysis Coordinator
C.HeartyR.Faccini (Deputy)
Computing Steering Committee
Executive Board
Senior Management Team
Analysis Working Groups
Physics Tools Groups
Run Quality Manager
System Managers (See Table)
Operations Manager W.Innes
Run Coordinator(s) J.OcarizS.Playfer
Online CoordinatorS.Luitz
Physics Analysis Coordination Team
Technical Board
Computing Executive Committee
Safety OfficerH.Lynch
MechanicalSupport Group
Other Computing Groups
Electronics Support Group
BABAR Central Support Group
Collaboration Council
Chief Mechanical EngineerJ.Krebs
Chief Electronics EngineerG.Haller
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June 14, 2005 BABAR Update and Plans 45
BABAR training matrix
Category Training Requirement
Recommended Supervisor
Documentation Requirements
a. Short-term visitor
None. Category (b) or higher recommended for BABAR users.
None None
b. Office worker
EOESH, GERT, ES&H 239
Member of BABAR Management team or SLAC Group Leader
Office JHAM, Office Building AHA
c. Shift-taker
(b) above plus Shift Training
Run Coordinator (b) above plus Shifter JHAM, IR-2 AHA
d. System worker
(b) above plus BABAR Orientation, job specific training
System Manager (b),(c) above plus System JHAM(s)
e. R&D worker
(b) above plus job specific training
R&D Manager (b) above plus job specific JHAM, job site AHA
http://www.slac.stanford.edu/BFROOT/www/Organization/Spokesperson/safety/safety_checklist.htm
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June 14, 2005 BABAR Update and Plans 46
BABAR work categories
Short-term visitor
Shift-taker
System worker
R&D worker
Office worker
Attends no more than one collaboration meeting per year or equivalentOnly works in the ROB or one of the other office areas but not IR-2 or other laboratory space
Stands shifts on BABAR in IR-2
Does maintenance work on a detector system in IR-2 or in a system laboratory space
Does development or testing work in a lab setting or temporary system space
EO
ES
H, G
ER
T, 2
39
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June 14, 2005 BABAR Update and Plans 47
Operational & physics manpower
Detector operations, online & offline data processing, MC production
Community CY2004 CY2005 CY2006 CY2007 CY2008 PhysicsUS University 63.0 60.0 56.0 52.0 52.0students/posdocs 15.2 14.5 13.5 12.5 12.5 68.0faculty/staff 32.5 31.0 28.9 26.8 26.8 33.8
47.7 45.4 42.4 39.4 39.4 101.8SLAC 33.0 32.0 30.0 26.0 26.0students/postdocs 16.0 15.5 14.5 12.6 12.6 20.0faculty/staff 17.0 16.5 15.5 13.4 13.4 20.5
33.0 32.0 30.0 26.0 26.0 40.5non-US 65.0 63.0 62.0 60.0 60.0students/postdocs 31.5 30.5 30.0 29.0 29.0 123.0faculty/staff 33.5 32.5 32.0 31.0 31.0 63.5
65.0 63.0 62.0 60.0 60.0 186.5Total 161.0 155.0 148.0 138.0 138.0students/postdocs 62.6 60.4 58.0 54.2 54.2 211.0faculty/staff 83.1 80.0 76.4 71.2 71.2 117.8
145.7 140.4 134.4 125.4 125.4 328.8
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June 14, 2005 BABAR Update and Plans 48
BABAR Detector
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June 14, 2005 BABAR Update and Plans 49
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June 14, 2005 BABAR Update and Plans 50
0 0/ SB J K
/J
0SK
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June 14, 2005 BABAR Update and Plans 51
Recoil B
Flavor tag:
eb ce
+ vertex separation = time
difference
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June 14, 2005 BABAR Update and Plans 52
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June 14, 2005 BABAR Update and Plans 53
Summer 2004 results for B
Caution averaging
!
3.2
5.2
>3 discrepancy between BABAR &
Belle
Belle 3.2 evidence for Direct CP violation not supported by BABAR
measurements
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June 14, 2005 BABAR Update and Plans 54
Winter 2005 results for B
4.0
5.4
~2.2 discrepancy between BABAR &
BelleBelle 4.0 evidence for Direct CP violation not supported by BABAR
measurements
2.2
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June 14, 2005 BABAR Update and Plans 55
Combined GLW and ADS constraint on
o
indirect constraint
8fi t: 58 7
CKM
o
From combined
GLW and ADS fi t:
2051 34
BABAR & BABAR & Belle Belle
combinedcombined
BABAR & BABAR & Belle Belle
combinedcombined
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June 14, 2005 BABAR Update and Plans 56
Competition: Better physics performance
Errors/LuminosityS Belle BABAR Belle BABAR
Mode S stat err lumi
Untag sample S stat err lumi
Untag sample st*sqrt(L) st*sqrt(L)
Perf Ratio
Lumi Ratio
phiK0 0.060 0.330 253 175 0.500 0.250 205 212 5.249 3.579 1.466 2.150etapK0 0.650 0.180 253 512 0.270 0.140 205 819 2.863 2.004 1.428 2.040KKK0 0.490 0.180 253 399 0.550 0.170 205 452 2.863 2.434 1.176 1.384f0K0 -0.470 0.410 253 102 0.950 0.320 192 152 6.521 4.434 1.471 2.163pi0K0 0.300 0.590 253 173 0.350 0.300 205 300 9.385 4.295 2.185 4.773ccbarK0 0.728 0.056 140 5417 0.722 0.040 205 10320 0.663 0.573 1.157 1.339pipi -1.000 0.210 140 373 -0.300 0.170 205 467 2.485 2.434 1.021 1.042rhopi S -0.280 0.230 140 483 -0.100 0.140 192 1184 2.721 1.940 1.403 1.968rhopi A+- -0.020 0.160 140 483 -0.210 0.110 192 1184 1.893 1.524 1.242 1.543rhopi A-+ -0.530 0.290 140 483 -0.470 0.140 192 1184 3.431 1.940 1.769 3.129Averages 1.432 2.153
Typically better errors for BABAR despite larger Belle
dataset
Normalized performanc
e ratio
Bottom line: BABAR is getting the equivalent of a factor of 2 in luminosity through better
analysis/detector performance
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June 14, 2005 BABAR Update and Plans 57
Data
Signal MC
Comb. Sig.
Crossfeed
bcl
(B0 -ℓ) = 2(B+ 0ℓ)
5 q2 bins
427 68 -ℓ147 23 0ℓ
82 fb-1
mES
E
mES and E fit for B ℓ
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June 14, 2005 BABAR Update and Plans 58
(B0 -ℓ) = 2(B+ 0ℓ)
Data
Signal MC
Comb. Sig.
Crossfeed
bcl
82 fb-1
3 q2 bins
101 17 -ℓ104 18 0ℓ
mES
E
mES and E fit for B ℓ