Public Page
Giovanni Punzi
Michal Kreps
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CDF B Physics Group Public Page |
B Physics Conveners: Giovanni Punzi Michal Kreps |
Run 2 Results |
| New Results | Older Preliminary Results | Published results |
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| Mixing and CP Violation | Lifetime | Decay | Spectroscopy | Production | PR Results |
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Please note that some results appear in several sections.
NEW |
Result | (pb-1) | Paper/Note |
|---|---|---|---|
| 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 |
arXiv:0905.3123 09-05-14 Submitted to PRD |
| 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) |
| Evidence for a Narrow Near-Threshold Structure in the J/ψφ Mass Spectrum | m = 4143.0 ± 2.9 (stat.) ± 1.2(syst.) MeV/c2 Γ = 11.7 +8.3 -5.0 (stat.) ± 3.7(syst.) MeV/c2 |
2700 |
Phys. Rev. Lett. 102, 242002 (2009) 09-03-05 |
| 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 → /\c π Decays | cτ(/\b) = 420.1 ± 13.7(stat.) ± 10.6 (syst.) μm τ(/\b)/τ(B0) = 0.916 ± 0.038 |
1070 |
Public
Note 09-04-16 |
| 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) |
| 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 |
arXiv:0906.5218 08-07-24 Submitted to PRL Prev. results: PRL, hep-ex/0612053 PRL 96, 102002 2006 |
Mixing and CP Violation |
Result | (pb-1) | Paper/Note |
|---|---|---|---|
| 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) |
| ACP and BR of Λb Charmless 2-Body Decays | ACP(Λb→ pπ)=0.03± 0.17± 0.05 ACP(Λb→ 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 |
Public Note 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 |
Public
Note 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 |
Note 8579 06-09-21 (rev. 08-04-10) 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(π+ 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+ → Jψ 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 |
Lifetimes |
Result | (pb-1) | Paper/Note |
|---|---|---|---|
| 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 |
arXiv:0905.3123 09-05-14 Submitted to PRD |
| /\b Lifetime in /\b → /\c π Decays | cτ(/\b) = 420.1 ± 13.7(stat.) ± 10.6 (syst.) μm τ(/\b)/τ(B0) = 0.916 ± 0.038 |
1070 |
Public
Note 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 |
Public
Note 08-06-12 |
| Measurement of Bc± Lifetime in Semileptonic Decays | cτ(Bc) = 142.5 +15.8-14.8(stat.) ± 5.5 (syst.) μm |
1000 |
Public
Note 08-03-27 |
| Measurement of the Bs Lifetime in hadronic Bs0 → Ds- (φ π-)π+ Decays | cτ(Bs) = 455.0 ± 12.2 (stat.) ± 8.2 (syst.) μm | 1300 |
Public
Note 08-02-07 revised 08-10-23 |
| 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 |
| Measurement of Exclusive B Lifetime in the modes B + → J/ψ K+, B0 → J/ψ K*0, B0 → J/ψ K0s, B0s → J/ψ φ and /\b → J/ψ /\, and lifetime ratios | τ(B+) = 1.630 ± 0.016(stat.) ± 0.011 (syst.) ps τ(B0) = 1.551 ± 0.019(stat.) ± 0.011 (syst.) ps τ(B0s) = 1.494 ± 0.054(stat.) ± 0.009 (syst.) ps τ(/\b) = 1.580 ± 0.077 (stat.) ± 0.012 (syst.) ps τ(B+)/τ(B0) = 1.051 ± 0.023 ± 0.004 (syst.) τ(B0s)/τ(B0) = 0.963 ± 0.047 ± 0.005 (syst.) τ(/\b)/τ(B0) = 1.018 ± 0.062 ± 0.007 (syst.) |
1000 |
Note 8524 06-11-30 Prev. Result: Phys. Rev. Lett. 98, 122001 (2007) |
|
Bs meson lifetime and Δ Γ (excl. reconstruction in Bs → K+K - decays) |
τBs→ K+K - = 1.53 ± 0.18 ± 0.02 ps ΔΓCP/ΓCP(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 τB0s/τB0 = 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+/τB0 = 1.10 ± 0.02 ± 0.01 τBs/τB0 = 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+/τB0 = 1.123 ± 0.040 +0.041-0.039 |
260 |
Note 05-02-24 |
|
/\b meson lifetime (excl. reconstruction in /\b → J/ψ /\ decays) |
τ/\b= 1.593 +0.083-0.078 ± 0.033 ps τ/\b/τB0 = 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 |
|---|---|---|---|
| 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 |
Public
Note 08-02-28 |
| ACP and BR of Λb Charmless 2-Body Decays | ACP(Λb→ pπ)=0.03± 0.17± 0.05 ACP(Λb→ 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 |
arXiv:0812.4271 Accepted by PRL |
| 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 |
arXiv:0812.4271 Accepted by PRL 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 |
Public
Note 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 |
| Search for FCNC Rare Decay: Bs,d → μ+ μ- |
BR(Bs → μ+ μ-) < 5.8*10-8 95%CL BR(Bd → μ+ μ-) < 1.8*10-8 95%CL |
2000 |
PRL 100,101802 (2008) Prev. Results: Note 8176 (780 pb-1) PRL 95, 221805 2005 PRL 93, 032001 2004 |
| 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 |
arXiv:0809.0080 Submitted to PRL |
| Search for the rare decays B+ → μ+μ−K+, B0 → μ+μ−K*0, and Bs → μ+μ−φ |
B(B+ → μ+μ−K+) =
(0.60 ± 0.15 ± 0.04)×10-6 B(B0 → μ+μ−K*0) = (0.82 ± 0.31 ± 0.10)×10-6 B(Bs → μ+μ−φ)/ B(Bs → J/ψφ) < 2.61(2.30)×10-3 at 95(90)%CL. |
924 |
Phys. Rev. D79, 011104(R) (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+3π-) and BR(B0 → Ds(*)D+(*)) / BR(B0 → D+3π-) |
BR(B0 → DsD+) / BR(B0 → D+3π) = 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 |
arXiv:0905.2146 Accepted by PRD |
|
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(π+ 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 / 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(Λc 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+ → Jψ 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 |
|---|---|---|---|
| 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) |
| Measurement of ψ(2S) Production Cross Section | σ inc.(pp → ψ(2S)X,|y(ψ(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 |
arXiv:0905.1982 Submitted to PRD 07-10-18 |
| Measurement of the correlated bb production in pp collision at 1960 GeV |
σb→μ,b→ μ
( pT b > 2GeV,|y|b<1.3; pTμ>3GeV, |η|μ<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)/σ(χc1) = 0.70 ± 0.04 ± 0.04 ± 0.06 (B.F.), for prompt production σ(χc2)/σ(χc1) = 0.25 ± 0.07± 0.01± 0.02 (B.F.), for B decay |
1100 | Phys. Rev. Lett. 98, 232001 (2007) |
| Measurement of b production cross section using Hb →
μD0(*)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>4.0GeV)*BR(Bc → J/ψ e X) / σB+*BR(B+ → J/ψK) = 0.282 ± 0.038 ± 0.065 ± 0.035(sys-yield) σBc(pt>6.0GeV)*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(ψ2S)=0.28 ± 0.27 ± 0.03 αPrompt(ψ2S) Longitudinal at higher pT |
800 |
PRL 99, 132001 (2007) |
| Exclusive B+→ J/ψ K+ cross section | σ(pT> 6GeV/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 |
|---|---|---|---|
| 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 |
arXiv:0905.3123 09-05-14 Submitted to PRD |
| Evidence for a Narrow Near-Threshold Structure in the J/ψφ Mass Spectrum | m = 4143.0 ± 2.9 (stat.) ± 1.2(syst.) MeV/c2 Γ = 11.7 +8.3 -5.0 (stat.) ± 3.7(syst.) MeV/c2 |
2700 |
Phys. Rev. Lett. 102, 242002 (2009) 09-03-05 |
| 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 |
arXiv:0906.5218 08-07-24 Submitted to PRL 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 Submitted to PRL 08-06-12 |
| Mass and width measurement of orbitally excited (L=1) B**0 mesons |
Γ(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 New Heavy Baryon Σband Σb* |
m(Σb+)
= 5808+2.0-2.3 ±
1.7 MeV/c2
m(Σb¯) = 5816+1.0-1.0 ± 1.7 MeV/c2 m(Σb*+) = 5829+1.6-1.8 ± 1.7 MeV/c2 m(Σb*¯) = 5837+2.1-1.9 ± 1.7 MeV/c2 |
1100 | PRL 99, 202001 (2007) 06-09-21 |
| 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 |
PRL, hep-ex/0612053 |
| 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/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 |
PR Results |
Result | (pb-1) | Paper/Note |
|---|---|---|---|
| X → J/ψ pi pi: J/ψ → e+e- | Results |
360 |
05-06-09 |
| Di Muon Trigger Signals |
Mass Plot |
360 |
04-09-30 |
| J/ψ → μ μ Signals |
Mass and Lifetime |
293 |
04-08-05 |
| Combined Opposite Side Tagger |
ε D2 = 1.8% | - | Note 8460 06-06-29 |
| Same Side Kaon Tagger |
ε D2 = 4.0 + 0.9 - 1.2% | - | Note 8206 06-03-02 |
| Opposite Side Kaon Tagger |
ε D2 = 0.229 ± 0.016 ± 0.001% | 355 |
Note 8241 06-04-13 |
| Neural Network based Jet Charge Tagger in Semileptonic(e,mu) Samples |
ε D2 = 0.917 ± 0.031%(electron) ε D2 = 0.938 ± 0.029%(muon) |
355 |
Note 05-03-03 |
| Improved Jet Charge Tagging in the Semileptonic Sample |
ε D2 = 0.715 ± 0.027% |
290 |
Note 04-08-12 |
| Likelihood Based Soft Electron Tagging |
ε D2 = 0.366 ± 0.031 +0.065-0.056% |
|
Note 04-08-12 |
| Likelihood Based Soft Muon Tagging |
ε D2 = 0.698 ± 0.042 +0.051-0.027% |
|
Note 04-07-22 |
| Sample Composition of Semileptonic B Events |
60 | 03-06-26 |
