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B Physics Conveners:
Pat Lukens
Jonathan Lewis


Run 2 Results

New Results Older Preliminary Results Published results

Please note that some results appear in several sections.

NEW

Result (pb-1) Paper/Note
Measurement of indirect CP-violating asymmetries in D0 → K+K and D0 → π+π decays AΓ+π) = [-0.1 ± 1.8 (stat.) ± 0.3 (syst.)] × 10−3,
AΓ(K+K) = [-1.9 ± 1.5 (stat.) ± 0.4 (syst.)] × 10−3,
9600 Submitted to Phys. Rev. Lett.
2014-10-21
Measurement of the Bc+→J/ψ μν relative cross section σ(Bc+)BR(Bc+→J/ψ μν) / σ(B+)BR(B+→J/ψ K+) / = 0.211 ± 0.012 ± 0.021 8700 Public Note 11083
2014-02-28

Mixing and CP Violation

Result (pb-1) Paper/Note
Measurement of indirect CP-violating asymmetries in D0 → K+K and D0 → π+π decays AΓ+π) = [-0.1 ± 1.8 (stat.) ± 0.3 (syst.)] × 10−3,
AΓ(K+K) = [-1.9 ± 1.5 (stat.) ± 0.4 (syst.)] × 10−3,
9600 Submitted to Phys. Rev. Lett.
2014-10-21
Observation of D0 Mixing Using the CDF II Detector RD = (3.51 ± 0.35) 10-3
y' = (4.3 ± 4.3) 10-3
x'2 = (0.08 ± 0.18) 10-3
9600 Phys. Rev. Lett. 111,231802
2013-04-08
CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons with 9.3 fb-1 ACP(B0→K+π-) = -0.083± 0.013 ± 0.003
ACP(Bs0→K-π+) = +0.22± 0.07 ± 0.02
ACPb0→pπ-) = +0.07± 0.07 ± 0.03
ACPb0→pK-) = -0.09± 0.08 ± 0.04
9300 Submitted to Phys. Rev. Lett.
2012-06-28
Measurement of the difference in CP violating asymmetry between D0→KK and D0→ππ Δ ACP = (-0.62± 0.21 ± 0.10)% 9600 Phys. Rev. Lett. 109, 111801 (2012)
2012-02-16
Previous result:
Phys. Rev. D 85, 012009 (2012)
Measurement of the CP Violating Phase βsJ/ψφ using the whole Run II sample βs within [-π/2,-1.51] U [-0.06,0.30] U [1.26,π/2] at the 68% C.L.
ΔΓs = 0.068 ± 0.026 (stat)± 0.007 (syst)) ps-1
τs = 1.528 ± 0.019 (stat) ± 0.009 (syst) ps
9600
Phys. Rev. Lett. 109, 171802 (2012)
2012-02-16
Updated 2012-04-19
Prev. results:
Phys. Rev. D 85 072002 (2012) (web)
PRL 100, 161802 (2008)
PRL 100, 121803 (2008)
Search for CP Violation in D0 → KSπ+ π- ACP = -0.0005 ± 0.0057 (stat) ± 0.0054 (syst)
and by submodes as listed on the web page
6000
Phys. Rev. D 86, 032007 (2012)
2011-10-13
First search for CP violation in B0s→φφ decays Au = (-0.7 ± 6.4(stat.) ± 1.8(syst.))%
Av = (-12.0 ± 6.4(stat.) ± 1.6(syst.))%
2900
Phys. Rev. Lett. 107, 261802 (2011)
2011-04-07
Measurement of the time-integrated mixing probability of B mesons χbar = 0.126 ± 0.008 (stat.+syst.)
1450
Public Note 10335
2011-01-27
Improved measurement of time-integrated CP violation in D0→h+h- decays ACP+π-) = [0.22 ± 0.24(stat.) ± 0.11 (syst.)]%
ACP(K+K-) = [-0.24 ± 0.22(stat.) ± 0.10 (syst.)]%
6000
Phys. Rev. D 85, 012009 (2012)
10-09-16
Previous result:
Phys. Rev. Lett. 94, 122001 (2005) (web)
First ADS analysis of B→DK Decays in Hadron Collisions RADS(K) = [22.5 ± 8.4 (stat.) ± 7.9 (syst.)]× 10-3
AADS(K) = -0.63 ± 0.40 (stat.) ± 0.23 (syst.)
RADS(π) = [4.1 ± 0.8 (stat.) ± 0.4 (syst.)]× 10-3
AADS(π) = 0.22 ± 0.18 (stat.) ± 0.06 (syst.)
5000
Phys Rev D 84 091504
2011-10-25
Updated Measurement of CP Violating Phase βsJ/ψφ βs within [0.02,0.52] U [1.08,1.55] at 68% C.L.
p-value(SM) = 0.44 (~0.8 σ)
ΔΓs = 0.075 ± 0.035 (stat) ± 0.01 (syst) ps-1
5200 arxiv:1112.1726
2010-05-13
Prev. results:
Public Note 9458 (web)
PRL 100, 161802 (2008)
PRL 100, 121803 (2008)
Calibration of the Same Side Kaon Tagger using Bs mixing A = 0.94 ± 0.15 (stat.) ± 0.13 (syst.)
T = ε A2 D2 = (3.2 ± 1.4 (stat.+syst.) ) %
5200 Public Note 10108
10-02-04
Combination of D0 and CDF results on ΔΓs and the CP-violating phase βsJ/ψφ βsJ/ψφ within [0.27, 0.59] U [0.97, 1.30] at 68% C.L.
p-value(SM) = 3.4% (~2.12 σ)
2D confidence region
2800
Public Note 9787
2009-07-21
ACP and BR of Λb Charmless 2-Body Decays ACPb→ pπ)=0.03± 0.17± 0.05
ACPb→ pK)=0.37 ± 0.17 ± 0.03
Derived: BR(Λb→ pπ)=(3.1± 0.6± 0.7)x10-6
(PDG) BR(Λb→ pK)=(5.0± 0.7± 1.0)x10-6
1100
Phys. Rev. Lett. 103, 031801 (2009)
Phys. Rev. Lett. 106, 181802 (2011)
07-10-18
Measurements of Branching Fractions and CP Asymmetries in B- → D0CPK- Decays R = 0.0745 ± 0.0043 (stat) ± 0.0045 (sys)
RCP+ = 1.30 ± 0.24 (stat) ± 0.12 (sys)
ACP+ = 0.39 ± 0.17 (stat) ± 0.04 (sys)
1100
Phys. Rev. D 81, 031105(R) (2010)
07-10-18
rev. 08-07-24
Evidence of Charm Mixing Rd=3.04± 0.55 (10-3)
Y'=8.5 ± 7.6 (10-3)
X'2=-0.12 ± 0.35 (10-3)
1500
Phys. Rev. Lett. 100, 121802 (2008)
CP Asymmetry in semileptonic B decays ASL=0.0080 ±0.0090 ± 0.0068
ASSL=0.020 ±0.021 ± 0.018
1600
Note 9015 07-08-16
Measurement of branching fractions and direct CP-asymmetries of B0(s)->h+h- decays observation: B0s→K-π+, Λ0b→pπ- and Λ0b→pK-
ACP(B0s→K-π+) = 0.39 ± 0.15 ± 0.08
ACP(B0→K+π-) = -0.086 ± 0.023 ± 0.009
B0(s)->h+h- decays: BF and limits
1000
Phys. Rev. Lett. 103, 031801 (2009)
Phys. Rev. Lett. 106, 181802 (2011)
07-10-18
Prev. Result:
PRL 97, 211802 2006
Measurement of B0 Oscillations and Calibration of Flavor Tagging in Semileptonic Decays
Δ md = 0.509 ± 0.010 ± 0.016ps-1
ε D2 = 1.54 ± 0.05
1000 Note 8235 06-04-06
Observation of Bs - Bs Oscillations Δms = 17.77 ± 0.10 (stat) ± 0.07(sys)
|Vtd|/|Vts| = 0.2060 ± 0.0007(stat+sys) +0.0081-0.0060(theo)
1000
PRL 97, 242003 2006
Prev. Result:
PRL 97, 062003 2006
Observation of Bs → K+K-
Measurement of B → hh BRs and
CP Asymmetry in B0 → K+π-

ACP+ K- - K+π-) = -0.013 ± 0.078 ± 0.012
BR(Bs → K+K-) = 33 ± 5.7 ± 6.7*10-6
180
PRL 97, 211802 2006
New Prel. Result
First observation of Bs -> φφ
Branching fraction and direct CP asymmetry in B+ -> φ K+
BR(Bs->φφ) = (1.4 ±0.6 ± 0.2 ± 0.5(BR))*10-5
BR(B+ → φ K) / BR(B+ → J/ψ K) =
0.0076 ± 0.0013 ± 0.0006
ACP = -0.07 ± 0.17 +0.03-0.02
180
PRL 95 031801 2005
Relative Branching Fractions and search for CP Asymmetry for D0 -> Kπ/KK/&pip;π
ACP(KK) = 2.0 ± 1.2 ± 0.6
ACP(ππ) = 1.0 ± 1.3 ± 0.6
123
PRL 94, 122001 2005

Lifetimes

Result (pb-1) Paper/Note
Measurement Bottom Baryon Properties with 9.6 fb-1 See web page for masses
and lifetimes
9600 Phys. Rev. D 89, 072014 (2014)
2013-08-01
Measurement of the Bc lifetime in fully reconstructed Bc → J/ψ π decays τ = (0.452 ± 0.048 ± 0.027)ps
cτ = 136 ± 14 ± 8 μm
6700 Phys. Rev. D 87 011101 (2013)
2012-10-08
First measurement of the B0s→J/ψf0 lifetime τ = 1.70 +0.12-0.11 (stat.)± 0.03(syst.) ps
3800
Phys. Rev. D 84 052012 (2011)
2011-06-21
Measurement of b-hadron lifetimes in decays to J/ψ τ(B+)=1.639 ± 0.009(stat.) ± 0.009 (syst.) ps
τ(B0)=1.507 ± 0.010(stat.) ± 0.008 (syst.) ps
τ(Λb)=1.537 ± 0.045 (stat.) ± 0.014 (syst.) ps
τ(B+)/τ(B0)=1.088 ± 0.009 (stat.) ± 0.004 (syst.)
τ(Λb)/τ(B0)=1.020 ± 0.030 (stat.) ± 0.008 (syst.)
4300 Phys. Rev. Lett. 106, 121804 (2011)
2009-12-17
Prev. results:
Note 8524 (web)
Phys. Rev. Lett. 98, 122001 (2007)
Observation of Ωb and measurement of properties of Ξb and Ωb m(Ωb)=6054.4 ± 6.8 (stat.) ± 0.9 (syst.) MeV/c2
m(Ξb)=5790.9 ± 2.6(stat.) ± 0.8(syst.) MeV/c2
τ(Ωb)=1.13+0.53-0.40(stat.) ± 0.02(syst.) ps
τ(Ξb)=1.56+0.27-0.25(stat.) ± 0.02(syst.) ps
4200
Phys. Rev. D80, 072003 (2009)
09-05-14
/\b Lifetime in /\b → /\c π Decays cτ(/\b) = 420.1 ± 13.7(stat.) ± 10.6 (syst.) ±m
τ(/\b)/τ(B0) = 0.916 ± 0.038
1070
PRL 104, 102002 (2010)
09-04-16
Updated Measurement of CP Violating Phase βsJ/ψφ βs within [0.28, 1.29] at 68% C.L.
p-value(SM) = 0.07 (~1.8 σ)
ΔΓs = 0.02 ± 0.05 (stat) ± 0.01 (syst) ps-1
2800
Public Note 08-07-24
Prev. results:
PRL 100, 161802 (2008)
PRL 100, 121803 (2008)
B+ Lifetime in B+ D0π+ τ(B+) = 1.662 ± 0.023 (stat.) ± 0.015 (syst.) ps 1000
PRD 83, 032008 (2011)
Measurement of Bc± Lifetime in Semileptonic Decays cτ(Bc) = 142.5 +15.8-14.8(stat.) ± 5.5 (syst.) ±m
1000
Public Note
08-03-27
Measurement of the Bs Lifetime in hadronic Bs0 → Ds- (φ π-+ Decays cτ(Bs) = 455.0 ± 12.2 (stat.) ± 8.2 (syst.) μm 1300
Phys. Rev. Lett. 107, 272001 (2011)
2008-02-07
revised 2008-10-23
Lifetime difference and CP violating phase in Bs → J/ψ φ decays ΔΓ = 0.076+0.059-0.063(stat.) ± 0.006 (syst.) ps-1
Results with CP phase floating
1700
PRL 100, 121803 (2008) 07-08-09
Prev. result (260 pb-1)
PRL 94, 101803 2005
Bs meson lifetime and ΔΓ
(excl. reconstruction in Bs → K+K - decays)

τBs→ K+K - = 1.53 ± 0.18 ± 0.02 ps
ΔΓCPCP(Bs→ K+K-) = -0.08 ± 0.23 ± 0.03
360
Note 06-01-26
B0s meson lifetime
(part. reconstruction in semileptonic decays)

τB0s= 1.381 ± 0.055 +0.052-0.046ps
τB0sB0 = 0.938 ± 0.044 +0.049-0.046
360
Note 7757 05-07-07
B+, B0 and Bs meson lifetimes
(excl. reconstruction in hadronic decays)

τB+= 1.66 ± 0.03 ± 0.01ps
τB0= 1.51 ± 0.02 ± 0.01ps
τBs= 1.60 ± 0.10 ± 0.02ps
τB+B0 = 1.10 ± 0.02 ± 0.01
τBsB0 = 1.06 ± 0.07 ± 0.01
360
Note 05-03-03
B+ and B0 meson lifetimes
(part. reconstruction in semileptonic decays)

τB+= 1.653 ± 0.029 +0.033-0.031ps
τB0= 1.473 ± 0.036 ± 0.054ps
τB+B0 = 1.123 ± 0.040 +0.041-0.039
260
Note 05-02-24
/\b baryon lifetime
(excl. reconstruction in /\b → J/ψ /\ decays)

τ/\b= 1.593 +0.083-0.078 ± 0.033 ps
τ/\bB0 = 1.037 ± 0.058
1000
PRL, hep-ex/0609021
New Prel. Result
Bc meson lifetime
(part. reconstruction in semileptonic decays)

τBc= 0.463 +0.073-0.065 ± 0.036 ps 360
PRL 97, 012002 2006
Time-Dependent Amplitude Analysis of Bs → J/ψ φ and B0 → J/ψ K*0 Decays and a Lifetime Difference in the Bs System
ΔΓ/Γ = 0.65+0.25-0.33 ± 0.01
260
PRL 94, 101803 2005
New Preliminary (1.5/fb)

Decays

Result (pb-1) Paper/Note
Branching Ratio Measurements of Exclusive b→s μ+μ- Decays and Angular Analysis in B→K(*) μ+μ- Decays See web page 9600 Public Note 10894
2012-06-28
Measurement of BR(Bs→J/ψφ) and extraction of the fragmentation fractions fs/fd * BR(Bs→J/ψφ): (3.17 ± 0.04 (stat.) ± 0.26 (sys) ± 0.14 (pdg) ) × 10- 4 9600 Public Note 10795
2012-04-20
Search for B0(s)→μ+μ- in the whole Run II sample Br(B0s→μ+μ-) = 1.3+0.9-0.7 ×10-8
Br(B0→μ+μ-) < 4.6 ×10-9 at the 0.95 CL
9600
Phys. Rev. D 87, 072003 (2013)
2013-01-29
Previous result:
Phys. Rev. Lett. 107, 191801 (2011)
Measurement of the B0s→ D(*)+sD(*)-s branching fractions Br(B0s→ D+sD-s) = (0.49 ± 0.06 ± 0.05 ± 0.08)%
Br(B0s→ D*+sD-s) = (1.13 ± 0.12 ± 0.19 ± 0.09)%
Br(B0s→ D*+sD*-s) = (1.75 ± 0.19 ± 0.17 ± 0.29)%
Br(B0s→ D(*)+sD(*)-s) = (3.38 ± 0.25 ± 0.30 ± 0.56)%
6800
Phys. Rev. Lett. 108, 201801 (2012)
2012-02-26
Prev. results:
Phys. Rev. Lett. 100, 021803 (2008)
Measurement of B(Λb → Λc+ π- π+ π-) B(Λb → Λc+ π- π+ π-) / B(Λb → Λc+ π-) =
3.04 ± 0.33 (stat) +0.70-0.55 (syst)
B(Λb → Λc+ π- π+ π-) =
(26.8 +11.9-11.2 ) × 10-3
2400 Phys. Rev. D 85, 032003 (2012)
2011-07-21
Observation of baryonic FCNC decays and updated measurement of Br and angular observables in B→K(*)μμ B(Λb0→Λμ+μ-) / B(Λb0→J/ψΛ)=[2.45±0.59(stat)±0.29(syst)]×10-3
See the webpage for all other results.
6800 Phys. Rev. Lett. 107, 201802 (2011)
Phys.Rev.Lett. 108 081807 (2012)
2011-08-02
Previous result:
Phys. Rev. Lett. 106, 161801 (2011) web
First evidence for pure annihilation B0s→π+π- decays Br(B0s→π+π-) = (0.57 ± 0.15(stat.) ± 0.10(syst.))10-6
0.05 < Br(B0→K+K-)106 < 0.46 at the 90% CL
6100
Phys. Rev. Lett. 108, 211803 (2012)
2011-05-24
Measurement of the B0s→J/ψf0 branching ratio R = 0.257 ± 0.020(stat.) ± 0.014(syst.)
3800
Phys. Rev. D 84 052012 (2011)
2011-06-21
Search for B0(s)→μ+μ- Br(B0s→μ+μ-) = 1.8+1.1-0.9 ×10-8
Br(B0→μ+μ-) < 6.0 ×10-9
7000
Phys. Rev. Lett. 107, 191801 (2011)
2011-07-07
Previous result:
Public Note 9892
First ADS analysis of B→DK Decays in Hadron Collisions RADS(K) = [22.0 ± 8.6 (stat.) ± 2.6 (syst.)]× 10-3
AADS(K) = -0.82 ± 0.44 (stat.) ± 0.09 (syst.)
RADS(π) = [2.8 ± 0.7 (stat.) ± 0.4 (syst.)]× 10-3
AADS(π) = 0.13 ± 0.25 (stat.) ± 0.02 (syst.)
7000
Phys. Rev D84, 091504 (2011)
2011-06-06
Previous result:
Public Note 10309
10-09-02
Observation of the Bs→J/ψKs and Bs→J/ψK* decays BR(Bs→J/ψK0)=(3.53±0.61(stat)±0.35(sys)±0.43(frag)±0.13(PDG))x10-5
BR(Bs→J/ψK*)=(8.3±1.2(stat)±3.3(sys)±1.0(frag)±0.4(PDG))x10-5
5900 Phys. Rev. D83, 052012 (2011)
2010-07-08
Measurement of the Polarization Amplitudes of the Bs0→φφ Decay |A0|2 = 0.348 ± 0.041 (stat) ± 0.021 (syst)
|A|||2 = 0.287 ± 0.043 (stat) ± 0.011 (syst)
|A|2 = 0.365 ± 0.044 (stat) ± 0.027 (syst)
cos δ|| = -0.91 + 0.15- 0.13 (stat) ± 0.09 (syst)
2900 Phys. Rev. Lett. 107, 261802 (2011)
2011-04-07
Forward-backward asymmetry in B→K(*)μμ and observation of Bs→φμμ BR(Bs→φμμ)/BR(Bs → J/ψφ)=
[1.11±0.25(stat)±0.09(syst)]x10-3
q2 dependence of AFB(B→K*μμ)
4400 PRL 106, 161801 (2011)
2009-11-12
Previous result:
Phys. Rev. D79, 011104(R) (2009)( web)
Resonance structure of Λb→Λcπ-π+π-
BR(Λb→Λc(2595)π-b→Λcπ-π+π-=
(2.5 ± 0.6(stat.) ± 0.5(syst.)) x 10-2
BR(Λb→Λc(2625)π-b→Λcπ-π+π-=
(6.2 ± 1.0(stat.) +1.0 -0.9(syst.)) x 10-2
BR(Λb→Σ(2455)c++ π- π-b→Λcπ-π+π-=
(5.2 ± 1.1(stat.) ± 0.8(syst.)) x 10-2
BR(Λb→Σ(2455)c0 π+π-b→Λcπ-π+π-=
(8.9 ± 2.1(stat.) +1.2 -1.0(syst.)) x 10-2
2400
Public Note 10001
09-10-29
Search for FCNC Rare Decay: Bs,d → μ+ μ-
BR(Bs → μ+ μ-) < 4.3*10-8 95%CL
BR(Bd → μ+ μ-) < 7.6*10-9 95%CL
3700
Public Note 9892
Prev. Results:
PRL 100,101802 (2008) (2 fb-1)
Note 8176 (780 pb-1)
PRL 95, 221805 2005
PRL 93, 032001 2004
Ratio of branching fractions:
BR(Bs→φφ)/BR(Bs→J/ψφ)
BR(Bs→φφ)/BR(Bs→J/ψφ)=
1.78 ± 0.14(stat) ± 0.20(sys) * 10-2
2900 Public Note 10064
Previous result:
PRL 95 031801 2005 (web)
Search for Lepton Flavor Violating Decays Bs,d → eμ BR(Bs0 → eμ) < 2.6*10-7 (95%CL)
BR(Bd0 → eμ) < 7.9*10-8 (95%CL)
2000 Phys. Rev. Lett. 102, 201801 (2009)
Search for the Rare Decay D0 → μ+ μ- BR(D0 → μ+ μ-) < 5.3*10-7 (95%CL)
360
PRD 82, 091105 (2010)
08-02-28
ACP and BR of Λb Charmless 2-Body Decays ACPb→ pπ)=0.03± 0.17± 0.05
ACPb→ pK)=0.37 ± 0.17 ± 0.03
Derived: BR(Λb→ pπ)=(3.1± 0.6± 0.7)x10-6
(PDG) BR(Λb→ pK)=(5.0± 0.7± 1.0)x10-6
1100
Phys. Rev. Lett. 103, 031801 (2009)
Measurement of branching fractions and direct CP-asymmetries of B0(s)->h+h- decays observation: B0s→K-π+, Λ0b→pπ- and Λ0b→pK-
ACP(B0s→K-π+) = 0.39 ± 0.15 ± 0.08
ACP(B0→K+π-) = -0.086 ± 0.023 ± 0.009
B0(s)->h+h- decays: BF and limits
1000
Phys. Rev. Lett. 103, 031801 (2009)
Prev. Result:
PRL 97, 211802 2006
Measurements of Branching Fractions and CP Asymmetries in B- → D0CPK- Decays R = 0.0745 ± 0.0043 (stat) ± 0.0045 (sys)
RCP+ = 1.30 ± 0.24 (stat) ± 0.12 (sys)
ACP+ = 0.39 ± 0.17 (stat) ± 0.04 (sys)
1100 Phys. Rev. D 81, 031105(R) (2010)
07-10-18
rev. 08-07-24
Angular Analysis of B0 → J/ψ K*0 Decays |A0|2 = 0.569 +/- 0.009 (stat) +/- 0.009 (syst)
|A|||2 = 0.211 +/- 0.012 (stat) +/- 0.006 (syst)
δ|| = -2.97 +/- 0.08 (stat) +/- 0.03 (syst)
δ = 2.97 +/- 0.06 (stat) +/- 0.01 (syst)
1700
Public Note
07-08-30
Prev. result (260 pb-1)
PRL 94, 101803 2005
First observation and measurement of Bs → D s K branching fraction Br(Bs0 →Ds±K+) / Br(Bs0 →Ds+π-) =
0.107 ± 0.019(stat) ± 0.008(sys)
1200
Phys. Rev. Lett. 103, 191802 (2009)
Measurement of the branching ratio of D+ → π-π+π+ B(D+ → π-π+π+)/ B(D+ → K-π+π+) =
(3.461 ± 0.038 ± 0.040 )%
B(D+ → π-π+π+) = (3.29± 0.11)10±? 3
193
Note 8499 06-08-31
B to Vector Vector Polarization in
Bd --> JPsi K* and Bd --> PhiK*
Table of Polarization Amplitudes 360 Note 8501 06-07-20
Observation of exclusive decay Bs → Ds Ds R(Bs → DsDs ) / BR(B0 → DsD+ ) = 1.67 ± 0.41 ± 0.12 ± 0.24 (fs/fd) ± 0.39(BR) 355
Phys. Rev. Lett. 100, 021803 (2008)
Ratio of Branching Fractions
BR(B0 → DsD+) / BR(B0 → D+-)
and BR(B0 → Ds(*)D+(*)) / BR(B0 → D+-)

BR(B0 → DsD+) / BR(B0 → D+3±) =
1.99 ± 0.13 ± 0.11
± 0.44(BR Ds → φπ) ± 0.08(other BR)
355
Phys. Rev. Lett. 98, 061802 (2007)
Measurement of the Ratio of Brancing Fractions R=BR(B-->D0K-)/BR(B-->D0π-) R = 0.065 ± 0.007 (stat) ± 0.004 (sys) 360
Note 8242 06-04-20
Ratio of Branching Fractions
BR(B+ → J/psiπ+) / BR(B+ → J/psi K+)

BR(B+ → J/psiπ+) / BR(B+ → J/psi K+) =
4.86 ± 0.82 ± 0.15
210
Phys. Rev. D79, 112003 (2009)
Ratio of Branching Fractions:
BR(Λb → Λc+μ-ν) /BR(Λb→ Λc+π-)

BR(Λb → Λcμ- ν) / BR(Λb → Λcπ-) =
16.6 ± 3.0 ± 1.0 +2.6-3.4(PDG) ± 0.3(EBR)

BR(B0 → D*-μ+ ν) / BR(B0 → D*-π+) =
16.5 ± 2.3 ± 0.6 ± 0.5(PDG) ± 0.8(EBR)

BR(B0 → D-μ+ ν) / BR(B0 → D-π+) =
9.9 ± 1.0 ± 0.6 ± 0.4(PDG) ± 0.5(EBR)
172
Phys. Rev. D79, 032001 (2009)
Observation of Bs → K+K-
Measurement of B → hh BRs and
CP Asymmetry in B0 → K+π-

ACP+ K- - K+π-) = -0.013 ± 0.078 ± 0.012
BR(Bs → K+K-) = 33 ± 5.7 ± 6.7*10-6
180
PRL 97, 211802 2006
New Prel. Result
D0 → K+ π - Wrong Sign DCS Decays
R(WS/RS) = 4.05 ± 0.21 (stat) ± 0.12 (sys) ± 10-3 350
PRD RC 74, 031109 2006
Observation of Decay Bs → ψ (2S) φ
BR(Bs → ψ (2S) φ) / BR(Bs → J/ψ φ) =
0.52 ± 0.13 ± 0.04 ± 0.06(BR)
360
PRL 96, 231801 2006
Ratio of Branching Ratios for Λb → Λcπ/B0 → D+π-
σΛb(pT > 6)*BR(Λb → Λcπ) / σB0(pT > 6)*BR(B0 → D+π-) = 0.82 ± 0.08 ± 0.11 ± 0.22(±c BR) 106
PRL 98, 122002 2007
Ratio of Branching Ratios for Bs/B0 and B+/B0
BR(Bs → Dsπ) / BR(B0 → D-π) =
1.13 ± 0.08 ± 0.23
BR(Bs → Dsπππ) / BR(B0 → D-πππ) =
1.05 ± 0.10 ± 0.22
355

PRL 98, 061802 2007
Prev. Result (115pb-1):
PRL 96, 191801 2006
Search for FCNC Rare Decay: Bs → μ+ μ-
BR(Bs → μ+ μ-) < 2.0*10-795%CL
364
PRL 95, 221805 2005
Prev. Result:
PRL 93, 032001 2004
New Prel. Result
Search for Λb in pK and pπ decays
BR(Λb → hh) < 2.3*10-590%CL
193
PRD 72, 051104 2005
Hadronic Moments in Semileptonic B Decays
M1 and M2
180
PRD RC 71, 051103 2005
First observation of Bs -> φφ
Branching fraction and direct CP asymmetry in B+ -> φ K+
BR(Bs->φφ) = (1.4 ±0.6 ± 0.2 ± 0.5(BR))*10-5
BR(B+ → φ K) / BR(B+ → J/ψ K) =
0.0076 ± 0.0013 ± 0.0006
ACP = -0.07 ± 0.17 +0.03-0.02
180
PRL 95 031801 2005
Relative Branching Fractions and search for CP Asymmetry for D0 -> Kπ/KK/ππ
ACP(KK) = 2.0 ± 1.2 ± 0.6
ACP(ππ) = 1.0 ± 1.3 ± 0.6
123
PRL 94, 122001 2005
Time-Dependent Amplitude Analysis of Bs → J/ψ φ and B0 → J/ψ K*0 Decays and a Lifetime Difference in the Bs System
ΔΓ/Γ = 0.65+0.25-0.33 ± 0.01
260
PRL 94, 101803 2005
New Preliminary (1.5/fb)
Search for FCNC Rare Decay: D0 → μ+ μ-
BR(D0 → μ+ μ-) < 2.5*10-690%CL
69
PRD 68, 091101 2003

Production

Result (pb-1) Paper/Note
Measurement of the Bc+→J/ψ μν relative cross section σ(Bc+)BR(Bc+→J/ψ μν) / σ(B+)BR(B+→J/ψ K+) / = 0.211 ± 0.012 ± 0.021 8700 Public Note 11083
2014-02-28
Measurement of BR(Bs→J/ψφ) and extraction of the fragmentation fractions fs/fd * BR(Bs→J/ψφ): (3.17 ± 0.04 (stat.) ± 0.26 (sys) ± 0.14 (pdg) ) × 10- 4 9600 Public Note 10795
2012-04-20
Fragmentation Study with D±s/D± -- K Correlations See the webpage for results 360 Public Note 10704
2012-02-02
First 3-dimensional measurement of the Υ(nS) spin-alignment See the webage for results 6700 Phys.Rev.Lett. 108, 151802 (2012)
2011-09-29
Measurement of Υ(1S) polarization Polarization vs. pT 2900
Public Note 9966
09-09-03
σBc*BR(Bc → J/ψ μ X) σBc(pt>6.0GeV)*BR(Bc → J/ψ μ ν) / σB+*BR(B+ → J/ψK)
= 0.227 ± 0.033(stat) +0.024-0.017(sys) ± 0.014(pt spectrum)
1000
Public Note 9740
09-03-05
Previous results:
Note 7649 (360 pb-1)
Study of multi-muon event 2100 arXiv:0810.5357
08-07-30
Measurement of ψ(2S) Production Cross Section σ inc.(pp → &psi(2S)X,|y(&psi(2S))| < 0.6, pT > 2 GeV/c)1.96 × Br(ψ(2S) → μμ) =
3.14 ± 0.04(stat)+0.23-0.22(syst) nb
1100
Phys. Rev. D80, 031103 (2009)
07-10-18
Measurement of the correlated bb production in pp collision at 1960 GeV σb→μ,b→&mu ( pT b > 2GeV,|y|b<1.3; pTμ>3GeV, |η|&mu<0.7)
= 1549 ± 133 pb
742
Phys. Rev. D77, 072004 (2008)
Measurement of Charm Meson pair Cross Sections Plots of Charm Cross Sections 1000 Note 8621 06-09-21
Relative cross sections of χc1 and χc2 σ(χc2)/&sigma(χc1) = 0.70 ± 0.04 (stat.) ± 0.04 (syst.) ± 0.06 (B.F.), for prompt production
σ(χc2)/σ(χc1) = 0.25 ± 0.07 (stat.)± 0.01 (syst.) ± 0.02 (B.F.), for B decay
1100 Phys. Rev. Lett. 98, 232001 (2007)
Measurement of b production cross section using Hb μ D0(*)channels
(Hb is an admixture of b hadrons)
σ(pp→ Hb) × BR(Hb→μ- D0 X) × BR(D0→π+K- )
= 3.53 nb ± 0.20 nb (stat.) +0.34 -0.36 (syst.) nb
σ(pp→Hb) × BR(Hb→μ- D*+ X) × BR(D*+→D0π+ )× BR(D0→π+K- )
= 1.04 nb ± 0.13 nb (stat.) +0.12 -0.14 (syst.) nb
83
Phys. Rev. D79, 092003 (2009)
Relative B Hadron Fragmentation Fractions fu/fd = 1.054 ± 0.018
+0.025-0.045(sys) ± 0.082 (BR)
fs/(fu+fd) = 0.160 ± 0.005
+0.011-0.010(sys) +0.057-0.034 (BR)
f/\b/(fu+fd) = 0.281 ± 0.012
+0.058-0.056(sys) +0.127-0.086 (BR)
360
Phys. Rev. D77, 072003 (2008)
Charged Particle Production in Association with B0,B+,Bs0 Mesons Fraction of associated K for Bs0: 20.2 ±1.2 ± 0.3 % 355
Note 8137 05-10-13
σBc*BR(Bc → J/ψ e X)
σBc(pt>4.0 GeV)*BR(Bc &rarr J/ψ e X) / &sigmaB+*BR(B+ → J/ψK)
= 0.282 ± 0.038 ± 0.065 ± 0.035(sys-yield)
σBc(pt>6.0 GeV)*BR(Bc → J/ψ e X) / σB+*BR(B+ → J/ψK)
= 0.242 ± 0.036 ± 0.051 ± 0.031(sys-yield)
360
Note 7926 05-04-07
Measurement of the J/ψ Spin Alignment from Prompt and B Decays
and Measurement of the ψ(2S) Spin Alignment from Prompt and B Decays
αB(J/ψ)=-0.066 ± 0.050
αPrompt(J/ψ) Longitudinal at higher pT
αB(ψ(2S))=0.28 ± 0.27 ± 0.03
αPrompt(α(2S)) Longitudinal at higher pT
800
PRL 99, 132001 (2007)
Exclusive B+→J/ψ K+ cross section σ(pT> 6 GeV/c, |y|< 1) = 2.78 ± 0.24 (stat+sys) μb 740 PRD 75, 012010 2007
Measurement of the J/ψ Meson and b Quark Production Cross Sections and J/ψ Only
Results
40
PRD 71, 032001 2005
Direct Charm Meson Production Cross Section
Cross Sections
5.8
PRL 91, 241804 2003

Spectroscopy

Result (pb-1) Paper/Note
Measurement Bottom Baryon Properties with 9.6 fb-1 See web page for masses
and lifetimes
9600 Phys. Rev. D 89, 072014 (2014)
2013-08-01
Measurement of Orbitally Excited B Mesons and First Evidence for a New Bπ Resonance See web page 9600 Phys. Rev. D 90, 012013
2013-09-23
Evidence for bottom baryon resonance Λb0* M(Λb0*)= 5919.5±0.35(stat)±1.72(sys) MeV/c2 9600 Phys. Rev. D 88, 071101 (2013)
2012-07-23
Observation of Ξ0b M(Ξ0b) = 5787.8 ± 5.0 (stat) ± 1.6 (syst) MeV/c²
M(Ξ-b) = 5796.7 ± 5.1 (stat) ± 1.6 (syst) MeV/c²
4200
Phys. Rev. Lett. 107, 102001 (2011)
2011-07-14
Measurement of the resonance properties of Σb(*) baryons M(Σb+)=5811.2+0.9-0.8(stat.) ± 1.7(syst.) MeV/c2
M(Σb-)=5815.5 +0.6-0.5(stat.) ± 1.7(syst.) MeV/c
M(Σb*+)= 5832.0 ± 0.7 (stat.)± +1.8(syst.) MeV/c2
M(Σb*-)= 5835.0 ± 0.6(stat.)± +1.8(syst.) MeV/c2 Γ(Σb+)=9.2+3.8-2.9(stat.)+1.0-1.1(syst.) MeV/c2
Γ(Σb-)=4.3+3.1-2.1(stat.)+1.0-1.1(syst.) MeV/c2
Γ(Σb*+)= 10.4+2.7-2.2(stat.)+0.8-1.2(syst.) MeV/c2
Γ(Σb*-)=6.4 +2.2-1.8(stat.)+0.7-1.1(syst.) MeV/c2
6000 Phys. Rev. D 85, 092011 (2012)
10-07-21
Prev. Result:
PRL 99, 202001 (2007) (web)
Observation of Ξ0b M(Ξ0b) = 5787.8 ± 5.0 (stat) ± 1.6 (syst) MeV/c²
M(Ξ-b) = 5796.7 ± 5.1 (stat) ± 1.6 (syst) MeV/c²
4200
arXiv:1107.4015
2011-07-14
Observation of a Narrow Near-Threshold Structure in the J/ψφ Mass Spectrum m = 4143.4 +2.9-3.0 (stat.) ± 0.6(syst.) MeV/c2
Γ = 15.3 +10.4 -6.1 (stat.) ± 2.5(syst.) MeV/c2
6000
Public Note 10244
10-07-01
Previous result:
Phys. Rev. Lett. 102, 242002 (2009) (web)
Measurement of the resonance properties of charm baryons M(Σc++(2455))=2453.90 ± 0.13(exp) ± 0.14 (PDG) MeV/c2
M(Σc0(2455))=2453.74 ± 0.12 ± 0.14 (PDG) MeV/c2
M(Σc++(2520))=2517.19 ± 0.46 ± 0.14 (PDG) MeV/c2
M(Σc0(2520))=2519.34 ± 0.58 ± 0.14 (PDG) MeV/c2
m(Λc+(2595))=2592.25 ± 0.24 ± 0.14 (PDG) MeV/c2
m(Λc+(2625))= 2628.11 ± 0.13 ± 0.14 (PDG) MeV/c2
5200 Phys. Rev. D84 012003 (2011)
2010-07-01
Observation of Ωb and measurement of properties of Ξb and Ωb m(Ωb)=6054.4 ± 6.8 (stat.) ± 0.9 (syst.) MeV/c2
m(Ξb)=5790.9 ± 2.6(stat.) ± 0.8(syst.) MeV/c2
τ(Ωb)=1.13+0.53-0.40(stat.) ± 0.02(syst.) ps
τ(Ξb)=1.56+0.27-0.25(stat.) ± 0.02(syst.) ps
4200
Phys. Rev. D80, 072003 (2009)
09-05-14
Mass Measurement of the X(3872) State m(X(3872)) = 3871.61 ± 0.16 ± 0.19 MeV/c2
Δ m < 3.2 (3.6) MeV/c2 at 90% (95%) C.L.
2400
Phys. Rev. Lett. 103, 152001 (2009)
08-07-24
Prev. results:
PRL, hep-ex/0612053
PRL 96, 102002 2006
Search for Narrow Resonances below the Υ Mesons Γl < 10 eV for 6.3 < m(μμ) < 9 GeV/c2
(90% CL)
630
arXiv:0903.2060
Eur. Phys. J. C62, 319-326 (2009)
08-06-12
Mass and width measurement of orbitally excited (L=1) B**0 mesons
ΔM(B2*0) = 22.7+3.8-3.2 (stat.) +3.2-10.2 (syst.) MeV/c2
m(B10) = 5725.3+1.6-2.2 (stat.) +1.4-1.5 (syst.) MeV/c2
m(B2*0) = 5740.2+1.7-1.8 (stat.) +0.9-0.8 (syst.) MeV/c2
1700
Phys. Rev. Lett. 102, 102003 (2009)
Previous analysis (370/pb)
Note 7938
Observation of the exclusive decay Bc to J/ψ π and mass measurement
m(B)c = 6275.6 ± 2.9 ± 2.5 MeV/c2 2400
Phys. Rev. Lett. 100, 182002 (2008)
Prev. prelim. results:
2.2/fb 07-07-12
1.1/fb 06-05-25
Published 360/pb
PRL 96, 082002 2006
Observation and mass measurement of the Ξb baryon
M(Ξb)=5,792.9 ± 2.5 (stat.) ± 1.7 (syst.) MeV/c2 1900
Phys. Rev. Lett. 99, 052002 (2007)
Observation of orbitally excited (L=1) Bs** mesons Q1 = 10.73 ± 0.21 ± 0.14 MeV/c2
Q2 = 66.96 ± 0.39 ± 0.14 MeV/c2
m(Bs1) = 5829.41 ± 0.21 ± 0.14 ± 0.6 (PDG) MeV/c2
m(Bs2*) = 5839 ± 0.39 ± 0.14 ± 0.5 (PDG) MeV/c2
1000 Phys. Rev. Lett. 100, 082001 (2008)
Search for ηb decay into J/ψ J/ψ σ(pp→ ηb, |y|<0.6, pT 3GeV) * BR < 2.6pb 1000 Note 8448 06-06-15
Study of the Lifetime Distribution of the X(3872)
Fbdecay = 16.9 ± 4.9 ± 2.0% 220
Note 7159
04-06-24
Pentaquark search in the channel J/ψ p
Results
280
Note 04-08-19
Pentaquark search in the channel Θc → Dxp
Results
240
Note 04-04-28
Pentaquark search in the channel Θ+ → p K0s
Results
180
Note 04-04-28
Quantum Numbers of the X(3872) JPC = 1++ or 2-+ 780
Phys. Rev. Lett. 98, 132002 (2007)
Search for Exotic S=-2 Baryons (Pentaquarks)
Results
220
PRD 75 , 032003 2007
B Hadron Mass Measurements
mB+ = 5279.10 ± 0.41 ± 0.36MeV
mB0 = 5279.63 ± 0.53 ± 0.33MeV
mBs = 5366.01 ± 0.73 ± 0.33MeV
mΛb = 5619.7 ± 1.2 ± 1.2MeV
220
PRL 96, 202001 2006
Measurement of orbitally-excited charm states D1 and D2
mD1 = 2421.7 ± 0.7 ± 0.6MeV
ΓD1 = 20.0 ± 1.7 ± 1.2 MeV
mD2 = 2463.3 ± 0.6 ± 0.8MeV
ΓD2 = 49.2 ± 2.3 ± 1.3 MeV
210
PRD RC 73, 051104 2006
Measurement of the Dipion Mass Spectrum in X(3872) -> J/ψ π π Decay
Dipion Mass Spectrum 360
PRL 96, 102002 2006
Evidence for exclusive decay Bc to J/ψ π and mass measurement
mBc = 6285.7 ± 5.3 ± 1.2MeV 360
PRL 96, 082002 2006
Observation and Mass Measurement of the X(3872)
mX(3872) = 3871.3 ± 0.7 ± 0.4MeV 220
PRL 93, 072001 2004
Measurement of the D+,Ds Mass Difference Using D+/Ds -> φπ
m(Ds)-m(D+) = 99.41 ± 0.38 ± 0.21
11.6 PRD 68, 072004 2003