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BaBar summer success. Riccardo Faccini Universita’ “La Sapienza” and INFN Rome BaBar Collaboration Meeting SLAC Sep 12 th 2006. Overall contribution to ICHEP. Belle contributed only 28 papers. 114 Contributed papers cfr 69 in 2005 and 72 in 2004 70 submitted to journal - PowerPoint PPT Presentation
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BaBar summer success
Riccardo FacciniUniversita’ “La Sapienza” and INFN RomeBaBar Collaboration MeetingSLAC Sep 12th 2006
Overall contribution to ICHEP 114 Contributed papers
cfr 69 in 2005 and 72 in 2004 70 submitted to journal Full listing (ordered by topic) in
http://www.slac.stanford.edu/BFROOT/www/Physics/Planning2006/ICHEP/ICHEP_pap.html
Two plenary talks 24 parallel talks in 6 different sessions All updates are on 345 fb-1 (315 onpeak)
Up to June 1st
Belle contributed only 28 papers
Publication History
Since Sep 1 2005:BaBar: 70Belle 28
Measurements of R=sigma_had/sigma_mumu 1 2 - - -
measurement of form factors 2 3 1 3 1
Probing strong interactions with the BaBar experiment 1 3 3 3
Quarkonium spectroscopy with the BaBar experiment 2 4 2 3 1
Study of recently observed mesonic Charm states and possible observation of new states 2 2 1 1
Observation of new baryonic Charm states 3 2 2 2
Study of Charmed Baryons with the BaBar experiment 2 3 - - -
Loose ends on heavy quark physics 4
Study of B decays to Open Charm final states 2 2 4 1 3 1
Study of the decays of Charm mesons 2 2 3 1
Study of two-body Charmless B decays 5 2 7 5
Study of multi-body Charmless B decays 1 2 4 2
Shape function from radiative B decays 3 2
b-->c lnu decays and measurement of Vcb 3 1 2
b-->ulnu decays and measurement of Vub 3 2 2
Measurements of Charmless hadronic BFs 3 0 2 3
Measurements of the CP angle alpha 4 0 3 2
Measurements of the CP angle gamma 1 1 7 0 0 1
Study of exclusive rad and ew penguin B decays 1 2 1 - - -
Search for mixing and CP violation in D decays 1 1 2
Measurement of the angle beta in Charmless B decays 7 0 6 7
Measurements of CP violation in B-->Charm decays 2 3 2 1 1
Search for leptonic B decays 3 2
Search for physics BSM in tau decays and production 1 0 3 1 2 3
total 31 40 66 33 19 16
BaBar BelleF P W F P WTalks
Content: a comparisonLegenda:
F: new on full stat P: new on partial stat W: already presented in winter ‘06
Same set of results on the very last chunk of data, but otherwise BaBar has >2 times more results
Note: both collaborations presented all results new since last round on summer conferences
Reader Digest of resultsRadiative B decays:
10 papers
Radiative B decays:10 papers
Charm(onium) prod and decay
13 papers
Charm(onium) prod and decay
13 papers
B to charm decays:12 papers
B to charm decays:12 papers
CP Violation, :5 papers
CP Violation, :5 papers
Semileptonic B:10 papers
Semileptonic B:10 papers
Charmless Hadronic B:19 papers
Charmless Hadronic B:19 papers
CP Violation :8 papers
CP Violation :8 papers
CP Violation, :14 papers
CP Violation, :14 papers
Tau and low-energy:8 papers
Tau and low-energy:8 papers
Charm(onium) spectroscopy:
16 papers
Charm(onium) spectroscopy:
16 papers
Courtesy of D. Lange
CP violation in B decaysRadiative B decays:
10 papers
Radiative B decays:10 papers
Charm(onium) prod and decay
13 papers
Charm(onium) prod and decay
13 papers
B to charm decays:12 papers
B to charm decays:12 papers
CP Violation, :5 papers
CP Violation, :5 papers
Semileptonic B:10 papers
Semileptonic B:10 papers
Charmless Hadronic B:19 papers
Charmless Hadronic B:19 papers
CP Violation :8 papers
CP Violation :8 papers
CP Violation, :14 papers
CP Violation, :14 papers
Tau and low-energy:8 papers
Tau and low-energy:8 papers
Charm(onium) spectroscopy:
16 papers
Charm(onium) spectroscopy:
16 papers
Reviewed in http://ichep06.jinr.ru/reports/2_hazumi_ichep2006.ppt and 3_10p20_Kowalewski.pdf
CP violation in Charmonium
sin2=0.710±0.034±0.0019(was 0.722±0.040)(Belle: 0.642±0.031±0.017)
=0.932±0.026±0.017(when floated on CP=-1 states)
Belle has only updated J/K0, still without publication
Repeated standard set of measurements 2.5 direct CP violation in CP=-1 modes
Combination with Belle
Measurements are consistent [2.1 in the case of CCP] and the averages consistent with the SM. Still to work to make the samples uniform (J/ K0 vs all modes)
bs penguins
Naïve average of all b s modes
sin2eff = 0.52 ± 0.052.6 deviation betweenpenguin and tree
(b s) (b c)
Naïve average of all b s modes
sin2eff = 0.52 ± 0.052.6 deviation betweenpenguin and tree
(b s) (b c)
Belle : 535M BB
BaBar: 347M BBBaBar still exploits its luminosity significantly better than Belle
Larger BaBar errors because of full Dalitz (see next slide)
4.9 from S=0
New result not yet in averages (more work needed)
BK+K-K0
75% of BKKK0 is not BKs Important to understand the underlying background and its
interference Full Dalitz analysis performed (with ,f0, and non
resonant component) Knowledge of strong phase allows to extract weak phases
without ambiguities Assuming SM (i.e. same weak phase for all final
states) =0.38±0.08 rad [SM=0.35] very good agreement with SM ambiguity on resolved at the 4 level (SM favored)
Twice more sensitive that Belle in BDh0
First ambiguity free measurement of in bs penguins
BKsKs
627.024.0
000
87
00
10)02.1()(
)5.7(32)(
KKB
KKNSS
640.035.0
000
9.10.2
7.77.6
00
10)13.019.1()(
)5.4( 0.23)(
KKB
KKNSS
Old Result:
40.039.0
00
8.07.0
00
39.0)(
4.1)(
SS
SS
KKC
KKS
First TD analysis in bd penguins
Measurement of
The error on from is dominated by the limit on
f
B0Significance 3.0 = [1.2 ± 0.4 (stat.) ± 0.3 (syst.)]x10-6 fL= 0.86+0.11-0.13 (stat.) ± 0.06 (syst.)
First evidence of B
Error on from 11o to 14o
Previous BaBar result: (0.5±0.4) 10-6
Belle never presented a resultHighly improved sensitivity
N00 = 98+32 ± 22−31
No news from Belle
Update on 2-body
00
N00 = 140 ± 25
CC0000 = = −0.33 −0.33 ±± 0.36 0.36 ±± 0.080.08
BrBr0000 = = (1.48 (1.48 ±± 0.26 0.26 ±± 0.12) 0.12)
1010−−66
B0 tags
B0 tags_
asymmetry
SS = = −0.53 −0.53 ±± 0.14 0.14 ±± 0.020.02
CC = = −0.16 −0.16 ±± 0.11 0.11 ±± 0.030.03
3.6 evidence of CPV
2.3 diff. btw. Belle and BaBar
(C = A)
Comparison with Belle’s
Interpreting B, B, and B results in terms of
CKM fitno in fit
169.7°
[164, 176]º at 68.3% C.L.
Measurement of Update of
BD0K [Dalitz]
B+
B-
B+
B-
BDK BD*K
DK(old) DK(new) D*K(old) D*K(new)
x- 0.08±0.07±0.03 0.041±0.059±0.018 -0.13±0.09±0.03 -0.106±0.091±0.020
y- 0.06±0.09±0.04 0.056±0.071±0.007 -0.14±0.11±0.02 -0.019±0.096±0.022
X+ -0.13±0.09±0.03 -0.072±0.056±0.014 0.14±0.09±0.03 0.084±0.088±0.015
Y+ 0.02±0.08±0.02 -0.033±0.066±0.007 0.01±0.12±0.04 0.096±0.111±0.032
Errors shrink (in particular systematics), but rB is smaller (x,y closer to 0) error on increases …
= 92 +/- 41 +/-10 +/- 16 (was 70+/-31+12-10+14-11 )
No update from Belle
Other B decaysRadiative B decays:
10 papers
Radiative B decays:10 papers
Charm(onium) prod and decay
13 papers
Charm(onium) prod and decay
13 papers
B to charm decays:12 papers
B to charm decays:12 papers
CP Violation, :5 papers
CP Violation, :5 papers
Semileptonic and leptonic B:
12 papers
Semileptonic and leptonic B:
12 papers
Charmless Hadronic B:19 papers
Charmless Hadronic B:19 papers
CP Violation :8 papers
CP Violation :8 papers
CP Violation, :14 papers
CP Violation, :14 papers
Tau and low-energy:8 papers
Tau and low-energy:8 papers
Charm(onium) spectroscopy:
16 papers
Charm(onium) spectroscopy:
16 papers
Reviewed in http://ichep06.jinr.ru/reports/5_12p10_Barlow.ppt and 3_10p20_Kowalewski.pdf
bul exclusive: probing theory
New “loose cuts method”
4 more results on Vub and 2 on Vcb
Old technique, 80 fb-1
B We have our own observation of all modes (as opposed to only ) Central values in between ours past ones and Belle
BaBar ’06 315 fb-1
No update from Belle
B: a year of emotions
April: Belle announces at FPCP a >4 evidence for Btn
May-July: BaBar struggles to reproduce the accuracy of Belle (in an area where we were traditionally more advanced)
August: BaBar presents only one of the two
independent analyses while still investigating
Belle presents an errata of the efficiencies by a factor 2!!!! Significance down to 3.5, BF a factor 2
larger BaBar and Belle have similar accuracies
Soon: BaBar is ready to publish both analyses expect an error which is 40% smaller than Belle’s
BF(B++)
Non B physicsRadiative B decays:
10 papers
Radiative B decays:10 papers
Charm(onium) prod and decay
13 papers
Charm(onium) prod and decay
13 papers
B to charm decays:12 papers
B to charm decays:12 papers
CP Violation, :5 papers
CP Violation, :5 papers
Semileptonic B:10 papers
Semileptonic B:10 papers
Charmless Hadronic B:19 papers
Charmless Hadronic B:19 papers
CP Violation :8 papers
CP Violation :8 papers
CP Violation, :14 papers
CP Violation, :14 papers
Tau and low-energy:8 papers
Tau and low-energy:8 papers
Charm(onium) spectroscopy:
16 papers
Charm(onium) spectroscopy:
16 papers
Reviewed in http://ichep06.jinr.ru/reports/4_11p30_pakhlov.ppt
D mixing Two innovative results in multibody decays
K K
RM=(0.023+0.018-0.014)% RM=(0.019+0.016-0.015)%
CombinedRM=(0.020+0.011-0.010)%
No mixing possible @ 2.1% C.L.
Belle has another “2” effect in DK Close to observation?
More new statesConfirmation of Belle + better params
Xc’
c*
DsJ
First observation(in 3 states)
Y(2S)Inconsistent with Y(4260): yet another state?
Summary At ICHEP’06 BaBar has achieved record productivity, overwhelming the direct
competitor Congratulations to everybody!!!
In the topics where the luminosity matters the refined statistical analysis technique makes BaBar competitive even with 35% less luminosity (345 M BB/547 M BB)
Showed dominance in several areas such as: CPV in bs penguins
New modes Measurements related to
First observation of B Dalitz Time Dependent analyses
First full analysis of BKKK0 (including K0) D-mixing in multibody D decays
Innovative technique to exploit also these decay modes Leptonic B Decays
After Belle corrected a mistake in their efficiencies, we have a measurement of BF(B) with same accuracy as them and potentially 40% better by fall
semileptonic B decays, Charm and Charmonium spectroscopy, …
Full listing of conf paps (ordered by topic) inhttp://www.slac.stanford.edu/BFROOT/www/Physics/Planning2006/ICHEP/ICHEP_pap.html
Backup slides
Update of
S=-0.19±0.21 C=-0.07±0.15 eff=(96+7-6)o [was 100+10-7]
fL=0.977±0.024
A=-0.142+/-0.041+/-0.015S=0.01+/-0.12+/-0.03C=0.154+/-0.090+/-0.037
now was
A=-0.088+/-0.049+/-0.013S=-0.10+/-0.14+/-0.04C=0.34+/-0.11+/-0.05
Direct CPV now at 3 sigma
Impact on
Improvement in h, allow to almost exclude dips between the multiple solutions
Evolution of sin2 measurements
Present CKM
fit
Present WA
BABAR 0.722±0.040±0.023Belle 0.652±0.039±0.020
BaBar 2006: 0.710±0.034
Evolution of SK measurementsBABAR 0.50±0.25±0.07
Belle 0.44±0.27±0.05
BaBar 2006: 0.31±0.29
Dalitz analysis allows better understanding of interference of other modes
Summary Alpha
Evidence of spoils measurement of Error up to 20o
measurements redone with reduced errors 4 evidence of CP violation
Update on gamma rB getting further smaller increased error on
Beta Dalitz KKKs measurement Update on all bs penguin
H’Ks closer to SM Others mostly similar
Semileptonic Lot of input to reduction of theo errors
First evidence of the charged mode Our own observation of the neutral modes (half way wrt Belle)
Behind Belle found we have to improve quickly sensitivity
D mixing Two of the three most sensitive modes ready (the other one is coming) Still only at the 2 level
Progress on spectroscopy New puzzles
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