Recent Hadronic Cross Section Measurements from B A B A R Konrad - - PowerPoint PPT Presentation
Recent Hadronic Cross Section Measurements from B A B A R Konrad Griessinger on behalf of the B A B A R Collaboration Institute for Nuclear Physics Mainz University International Workshop on e + e Collisions from Phi to Psi, June 2017 +
R
Konrad Griessinger
R Collaboration
Institute for Nuclear Physics Mainz University
International Workshop on e+e− Collisions from Phi to Psi, June 2017
π+π−π0π0 and π+π−η at BABA R June 2017 1 / 20
1
Introduction
2
Cross section e+e− → π+π−π0π0
3
Cross section e+e− → π+π−η
4
Cross sections e+e− → KSKLπ0, KSKLπ0π0, KSKLη
π+π−π0π0 and π+π−η at BABA R June 2017 2 / 20
Introduction
= g e 2m s (gµ − 2)/2 =: aSM
µ
= aQED
µ
+ aweak
µ
+ ahadronic
µ
Interaction Contribution [·10−11] Uncertainty [·10−11] QED [1] 116 584 718.951 0.080 EW [9] 153.6 1 hadronic VP [6, 12] 6837 43 hadronic LbL [11, 2] 119 41 total theory 116 591 828 60 E821 experiment [15] 116 592 089 63 deviation exp-theo 261 87
π+π−π0π0 and π+π−η at BABA R June 2017 3 / 20
Introduction
aµ – aµ
exp
× 10–11
HMNT 07 (e+e–-based) JN 09 (e+e–) Davier et al. 09/1 (τ-based) Davier et al. 09/1 (e+e–) Davier et al. 09/2 (e+e– w/ BABAR) HLMNT 10 (e+e– w/ BABAR) DHMZ 10 (τ newest) DHMZ 10 (e+e– newest) BNL-E821 (world average)
–285 ± 51 –299 ± 65 –157 ± 52 –312 ± 51 –255 ± 49 –259 ± 48 –195 ± 54 –287 ± 49 0 ± 63
Just a fluctuation? 3σ effect, thus reduction of uncertainties necessary!
π+π−π0π0 and π+π−η at BABA R June 2017 4 / 20
Introduction
ahad
µ
≈ 1 4π3 ∞
m2
π
Kµ(s) · σe+e−→had(s)ds Kernel function cross section
π+π−π0π0 and π+π−η at BABA R June 2017 5 / 20
Introduction
ahad
µ
≈ 1 4π3 ∞
m2
π
Kµ(s) · σe+e−→had(s)ds
2E, GeV 0.5 1 1.5 2 2.5 3 3.5 4 4.5 cross sections, nb
2 −
10
1 −
10 1 10
2
10
3
10
γpreliminary
Courtesy of F. Ignatov
π+π−π0π0 and π+π−η at BABA R June 2017 5 / 20
Introduction
R Experiment
Experimental specifications Energy: √s ≈ 10.58 GeV (Ee− ≈ 9.0 GeV, Ee+ ≈ 3.1 GeV), Luminosity: L ≈ 500 fb−1 (Υ(4S))
π+π−π0π0 and π+π−η at BABA R June 2017 6 / 20
Introduction
R Experiment
Experimental specifications Energy: √s ≈ 10.58 GeV (Ee− ≈ 9.0 GeV, Ee+ ≈ 3.1 GeV), Luminosity: L ≈ 500 fb−1 (Υ(4S))
π+π−π0π0 and π+π−η at BABA R June 2017 6 / 20
Introduction
R
ISR selection Detected high energy photon: Eγ > 3GeV → defines ECM & provides strong background rejection Event topology: γISR back-to-back to hadrons → high acceptance Kinematic fit including γISR → very good energy resolution (4 – 15MeV) Continuous measurement from threshold to ∼5GeV → provides common, consistent systematic uncertainties
hadrons γISR e−(9GeV) e+(3GeV) √ s′ = ECM γ
hadrons
π+π−π0π0 and π+π−η at BABA R June 2017 7 / 20
Cross section e+e− → π+π−π0π0
PRELIMINARY
π+π−π0π0 and π+π−η at BABA R June 2017 8 / 20
Cross section e+e− → π+π−π0π0
e+e− → π+π−π0π0
M4π(GeV/c2) σ(nb)
5 10 15 20 25 30 35 0.5 1 1.5 2 2.5 3 3.5 4 4.5
P R E L I M I N A R Y
ECM(GeV)
1.2 – 2.7 3.1% 2.7 – 3.2 6.7% > 3.2 7.1%
dominant ISR-bkg π+π−3π0 removed using data most precise measurement to date widest energy range 0.85 < ECM < 4.5 GeV
π+π−π0π0 and π+π−η at BABA R June 2017 9 / 20
Cross section e+e− → π+π−π0π0
e+e− → π+π−π0π0
M4π(GeV/c2) σ(nb)
5 10 15 20 25 30 35 0.5 1 1.5 2 2.5 3 3.5 4 4.5
P R E L I M I N A R Y
ECM(GeV)
1.2 – 2.7 3.1% 2.7 – 3.2 6.7% > 3.2 7.1%
1 2 3 4 5 6 7 8 0.84 0.86 0.88 0.9 0.92 0.94 0.96 0.98 1 1.02 1.04
M4π(GeV/c2) σ(0)(nb) M4π(GeV/c2) σ(0)(nb)
P R E L I M I N A R Y Comparison to Chiral Pert. Theo.
(Eur.Phys.J., C24:535–545, 2002 [8])
π+π−π0π0 and π+π−η at BABA R June 2017 9 / 20
Cross section e+e− → π+π−π0π0
5 10 15 20 25 30 35 40 45 50 1 1.5 2 2.5 3 3.5 4 4.5 SND ADONE γγ2 ACO DCI-M3N ND ADONE MEA OLYA
ECM (GeV) σ(e+e- → π+π-2π0) (nb)
ahad
µ
= 1 4π3 ∞
m2
π0
e
s
1 + 2m2
e
s
Kµ(s)σ(s)ds
Before BABA
R (Eur.Phys.J.,C31:503,2003) [5]
aµ(1.02 < √s < 1.8 GeV) = (16.76 ± 1.31 ± 0.20rad) × 10−10
π+π−π0π0 and π+π−η at BABA R June 2017 10 / 20
Cross section e+e− → π+π−π0π0
5 10 15 20 25 30 35 40 45 50 1 1.5 2 2.5 3 3.5 4 4.5 SND ADONE γγ2 ACO DCI-M3N ND ADONE MEA OLYA BaBar
ECM (GeV) σ(e+e- → π+π-2π0) (nb)
PRELIMINARY
ahad
µ
= 1 4π3 ∞
m2
π0
e
s
1 + 2m2
e
s
Kµ(s)σ(s)ds
Before BABA
R (Eur.Phys.J.,C31:503,2003) [5]
aµ(1.02 < √s < 1.8 GeV) = (16.76 ± 1.31 ± 0.20rad) × 10−10 New result in the same energy range aµ(1.02 < √s < 1.8 GeV) = (17.4 ± 0.1stat ± 0.6syst) × 10−10
π+π−π0π0 and π+π−η at BABA R June 2017 10 / 20
Cross section e+e− → π+π−π0π0
5 10 15 20 25 30 35 40 45 50 1 1.5 2 2.5 3 3.5 4 4.5 SND ADONE γγ2 ACO DCI-M3N ND ADONE MEA OLYA BaBar
ECM (GeV) σ(e+e- → π+π-2π0) (nb)
PRELIMINARY
ahad
µ
= 1 4π3 ∞
m2
π0
e
s
1 + 2m2
e
s
Kµ(s)σ(s)ds
New result starting at lower limit aµ(0.85 < √s < 1.8 GeV) = (17.9 ± 0.1stat ± 0.6syst) × 10−10 New result in a wider energy range aµ(0.85 < √s < 3.0 GeV) = (21.8 ± 0.1stat ± 0.7syst) × 10−10
π+π−π0π0 and π+π−η at BABA R June 2017 11 / 20
Cross section e+e− → π+π−η
PRELIMINARY
π+π−π0π0 and π+π−η at BABA R June 2017 12 / 20
Cross section e+e− → π+π−η
P R E L I M I N A R Y PRELIMINARY Most accurate σ(e+e− → π+π−η) measurement to date First measurement up to 3.5 GeV Especially above 1.6 GeV more precise than previous data
π+π−π0π0 and π+π−η at BABA R June 2017 13 / 20
Cross section e+e− → π+π−η
P R E L I M I N A R Y P R E L I M I N A R Y Model 1: ρ(770) − ρ(1450), fit: ECM < 1.7 GeV Model 2: ρ(770) − ρ(1450) − ρ(1700), fit: ECM < 1.9 GeV Model 3: ρ(770) − ρ(1450) + ρ(1700), fit: ECM < 1.9 GeV Model 4: ρ(770) − ρ(1450) + ρ(1700) + ρ(2150), fit: ECM < 2.2 GeV “+”: relative phase 0◦, “-”: relative phase 180◦
π+π−π0π0 and π+π−η at BABA R June 2017 14 / 20
Cross section e+e− → π+π−η
ahad
µ
= 1 4π3 ∞
m2
π0
e
s
1 + 2m2
e
s
Kµ(s)σ(s)ds
P R E L I M I N A R Y HLMNT 2011 [10] aµ(√s < 1.8 GeV) = (0.88 ± 0.10) × 10−10 DHMZ 2011 [6] aµ(√s < 1.8 GeV) = (1.15 ± 0.06stat ± 0.08syst) × 10−10
π+π−π0π0 and π+π−η at BABA R June 2017 15 / 20
Cross section e+e− → π+π−η
ahad
µ
= 1 4π3 ∞
m2
π0
e
s
1 + 2m2
e
s
Kµ(s)σ(s)ds
P R E L I M I N A R Y HLMNT 2011 [10] aµ(√s < 1.8 GeV) = (0.88 ± 0.10) × 10−10 DHMZ 2011 [6] aµ(√s < 1.8 GeV) = (1.15 ± 0.06stat ± 0.08syst) × 10−10 New result aµ(√s < 1.8 GeV) = (1.19 ± 0.02stat ± 0.06syst) × 10−10
π+π−π0π0 and π+π−η at BABA R June 2017 15 / 20
Cross sections e+e− → KSKLπ0, KSKLπ0π0, KSKLη
PRD 95 (2017), 052001 PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 16 / 20
Cross sections e+e− → KSKLπ0, KSKLπ0π0, KSKLη
1 2 3 1 2 3 4
Ec.m. (GeV) σ(KSKLπ0) (nb)
KSKLπ0 syst.: 10–30 %
0.1 0.2 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8
Ec.m., GeV σ(φπ0), nb
φπ0
0.2 0.4 0.6 1 2 3 4
Ec.m. (GeV) σ(KSKLπ0π0) (nb)
KSKLπ0π0 syst.: 25–60 %
0.5 1 1 2 3 4
Ec.m. (GeV) σ(KSKLη) (nb)
KSKLη syst.: 15–30 %
1 2 3 1.5 1.75 2 2.25 2.5
Ec.m. (GeV) σ(φη) (nb)
φη
Published in PRD 95 (2017), 052001
π+π−π0π0 and π+π−η at BABA R June 2017 17 / 20
Cross sections e+e− → KSKLπ0, KSKLπ0π0, KSKLη
1 2 3 1 1.5 2 2.5 3 3.5 4
Ec.m. (GeV) σ (nb)
KSK ±π∓π0 total unc.: 6–12 %
0.2 0.4 0.6 0.8 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
Ec.m. (GeV) σ (nb)
KSK ±π∓η total unc.: 13–19 %
Published in PRD 95 (2017), 092005
X
π+π−π0π0 and π+π−η at BABA R June 2017 18 / 20
Cross sections e+e− → KSKLπ0, KSKLπ0π0, KSKLη
Courtesy of
X all KKπ(π) channels now measured by BABA
R
⇒ isospin relations not necessary any more new contributions to gµ − 2:
⋆ aµ(KKπ) = (2.45 ± 0.15) × 10−10 [4] ⋆ aµ(KKππ) = (0.85 ± 0.05) × 10−10
π+π−π0π0 and π+π−η at BABA R June 2017 19 / 20
Summary
ISR physics has proven to be a very productive field even years after the end of data taking at the B-factories Precision measurements of hadronic cross sections have greatly improved aSM
µ
& more hadronic final states in preparation New results from BABA
R:
⋆ e+e− → π+π−π0π0 ⋆ e+e− → π+π−η ⋆ first measurement of e+e− → KSKLπ0, KSKLπ0π0, KSKLη, KSK ±π∓π0, KSK ±π∓η
π+π−π0π0 and π+π−η at BABA R June 2017 20 / 20
Summary
Thank you! Any questions?
π+π−π0π0 and π+π−η at BABA R June 2017 21 / 20
π+π−π0π0 and π+π−η at BABA R June 2017 22 / 20
Full Υ(4S) on peak data set of 454.4 fb−1
e+e− → π+π−π0π0γISR
χ2
4π
Events
1000 2000 3000 4000 5000 10 20 30 40 50 60 70 80 90 100
+ data × signal simulation P R E L I M I N A R Y Main Selection Requirements exactly 2 charged tracks ≥ 5 photons E lab
γ
> 0.05 GeV |Mreco
π0
− MPDG
π0
| < 0.03 GeV EγISR > 3 GeV 6C kinematic fit: χ2
2π2π0γ < 30
reject other hypotheses Muon and Kaon PID
π+π−π0π0 and π+π−η at BABA R June 2017 23 / 20
e+e− → π+π−π0π0γISR Simulated background channels:
1 10 10 2 10 3 0.5 1 1.5 2 2.5 3 3.5 4 4.5
M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2
PRELIMINARY
q¯ q, 3π, 4π2π0, KsKπ, K +K −2π0, ττ, π+π−3π0
π+π−π0π0 and π+π−η at BABA R June 2017 24 / 20
e+e− → π+π−π0π0γISR Simulated background channels:
1 10 10 2 10 3 0.5 1 1.5 2 2.5 3 3.5 4 4.5
M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2
PRELIMINARY
q¯ q, 3π, 4π2π0, KsKπ, K +K −2π0, ττ, π+π−3π0
Main issue: background from e+e− → π+π−3π0 Only little data [3] and no full simulation available
π+π−π0π0 and π+π−η at BABA R June 2017 24 / 20
e+e− → π+π−π0π0γISR Simulated background channels:
1 10 10 2 10 3 0.5 1 1.5 2 2.5 3 3.5 4 4.5
M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2
PRELIMINARY
q¯ q, 3π, 4π2π0, KsKπ, K +K −2π0, ττ, π+π−3π0
Main issue: background from e+e− → π+π−3π0
100 200 300 400 500 600 700 800 0.5 1 1.5 2 2.5 3 3.5 4 4.5
M5π(GeV/c2) Events / 40 MeV/c2
PRELIMINARY ⇒ dedicated BABA
R measurement
⇒ adjust simulation
π+π−π0π0 and π+π−η at BABA R June 2017 24 / 20
Sideband bkg subtraction
1 10 10 2 10 3 0.5 1 1.5 2 2.5 3 3.5 4 4.5
M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2
PRELIMINARY N1s =
β β−α · N1 − 1 β−α · N2
α := N2s
N1s ,
β := N2b
N1b
π+π−π0π0 and π+π−η at BABA R June 2017 25 / 20
Sideband bkg subtraction
1 10 10 2 10 3 0.5 1 1.5 2 2.5 3 3.5 4 4.5
M4π(GeV/c2) Events / 20 MeV/c2 M4π(GeV/c2) Events / 20 MeV/c2
PRELIMINARY N1s =
β β−α · N1 − 1 β−α · N2
α := N2s
N1s ,
β := N2b
N1b
Comparison of both methods
M4π(GeV/c2)
0.9 0.925 0.95 0.975 1 1.025 1.05 1.075 1.1 0.5 1 1.5 2 2.5 3 3.5 4 4.5
(nb)
PRELIMINARY
N(after sideband subtr.) N(after MCbkg subtr.)
Less than 1 % discrepancy in the peak region around 1.5 GeV/c2
π+π−π0π0 and π+π−η at BABA R June 2017 25 / 20
e+e− → KSKLπ0
200 400 600 1 2
m(KSπ0) (GeV/c2) Events/0.03 GeV/c2
200 400 600 1 2
m(KLπ0) (GeV/c2) Events/0.03 GeV/c2
20 40 1 1.025 1.05 1.075 1.1
m(KS KL) (GeV/c2) Events/0.004 GeV/c2
e+e− → KSKLη
50 100 150 1 2
m(KSπ0) (GeV/c2) Ev./0.03 GeV/c2
50 100 150 1 2
m(KLπ0) (GeV/c2) Ev./0.03 GeV/c2
20 40 60 80 1 1.025 1.05 1.075 1.1
m(KSKL), (GeV/c2) Events/0.004 GeV/c2
Published in PRD 95 (2017), 052001
π+π−π0π0 and π+π−η at BABA R June 2017 26 / 20
20 40 60 80 2.5 3 3.5 4
m(KSKLπ0) (GeV/c2) Events/0.02 GeV/c2
10 20 30 2.5 3 3.5 4
m(KSKLη) (GeV/c2) Events/0.02 GeV/c2
10 20 2.5 3 3.5 4
m(KSKLπ0π0) (GeV/c2) Events/0.02 GeV/c2
20 40 2.5 3.1 3.7 m(K*(892)0K0) (GeV/c2) Events/0.02 GeV/c2 10 20 30 2.5 3.1 3.7 m(K2*(1420)0K0) (GeV/c2) Events/0.02 GeV/c2
Published in PRD 95 (2017), 052001
π+π−π0π0 and π+π−η at BABA R June 2017 27 / 20
0.5 1 1.5 2 2.5 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 1 10 10 2
m(Kπ) (GeV/c2) m(KSπ0) (GeV/c2)
0.5 1 1.5 2 2.5 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 1 10 10 2
m(KSπ) (GeV/c2) m(Kπ0) (GeV/c2)
0.2 0.4 0.6 0.8 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
Ec.m. (GeV) σ (nb)
K ∗0 e+e− → K ∗0K ±π∓ △e+e− → K ∗0KSπ0
0.2 0.4 0.6 0.8 1.5 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
Ec.m. (GeV) σ (nb)
△e+e− → K ∗(892)±K ∓π0 e+e− → K ∗(892)±K 0
Sπ∓
Published in PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 28 / 20
200 400 600 0.5 1 1.5 2 2.5 3
m(KSπ0) (GeV/c2) Events/0.02 GeV/c2
100 200 300 0.5 1 1.5 2 2.5 3
m(K+-π-+) (GeV/c2) Events/0.02 GeV/c2
200 400 600 0.5 1 1.5 2 2.5 3
m(KSπ+-) (GeV/c2) Events/0.02 GeV/c2
200 400 0.5 1 1.5 2 2.5 3
m(K+-π0) (GeV/c2) Events/0.02 GeV/c2
Published in PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 29 / 20
50 100 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6
m(KSπ0) (GeV/c2) N(K*0→K+-π-+)/0.05 GeV/c2
100 200 300 0.4 0.6 0.8 1 1.2 1.4
m(π+-π0) (GeV/c2) Events/0.02 GeV/c2
50 100 150 200 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3
m(K+-π0π-+) (GeV/c2) Events/0.02 GeV/c2
200 400 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6
m(K+-π0) (GeV/c2) N(K*-+→KSπ-+)/0.05 GeV/c2
0.25 0.5 0.75 1 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75
Ec.m. (GeV) σ(KSKρ) (nb)
100 200 300 0.75 1 1.25 1.5 1.75 2 2.25 2.5 2.75 3
m(KSπ0π-+) (GeV/c2) Events/0.02 GeV/c2
Published in PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 30 / 20
20 40 60 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5
m(KSπ+-) (GeV/c2) Events/0.02 GeV/c2
10 20 0.6 0.8 1 1.2 1.4 1.6 1.8 2
m(K+π-) (GeV/c2) Events/0.02 GeV/c2
0.05 0.1 0.15 0.2 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
Ec.m. (GeV) σ(K*(892)+K-η) (nb)
0.02 0.04 0.06 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
Ec.m. (GeV) σ(K*(892)0K0η) (nb)
Published in PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 31 / 20
25 50 75 100 2.8 3 3.2 3.4 3.6 3.8
m(KSK+-π-+π0) (GeV/c2) Events/0.005 GeV/c2
5 10 15 20 25 2.8 3 3.2 3.4 3.6 3.8
m(KSK+-π-+η) (GeV/c2) Events/0.010 GeV/c2
20 40 60 80 3 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2
m(KSK+-π-+π0) (GeV/c2) N(K+-KSρ-+)/0.01 GeV/c2
Published in PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 32 / 20
10 20 30 3 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2
m(KSK+-π-+π0) (GeV/c2) N(K*0(892)KSπ0)/0.01 GeV/c2
K ∗0KSπ0
20 40 3 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2
m(KSK+-π-+π0) (GeV/c2) N(K*0(892)K+π-)/0.01 GeV/c2
K ∗0K ±π∓
20 40 3 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2
m(KSK+-π-+π0) (GeV/c2) N(K*(892)-K+π0)/0.01 GeV/c2
K ∗±K ∓π0
20 40 60 3 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2
m(KSK+-π-+π0) (GeV/c2) N(K*(892)-KSπ+)/0.01 GeV/c2
K ∗±KSπ∓
Published in PRD 95 (2017), 092005
π+π−π0π0 and π+π−η at BABA R June 2017 33 / 20
π+π−π0π0 and π+π−η at BABA R June 2017 34 / 20
[1]
Complete tenth-order qed contribution to the muon g − 2.
[2]
Remarks on higher-order hadronic corrections to the muon g − 2. Phys.Lett., B735:90–91, 2014. [3]
Hadronic Cross-Sections Study in e+e− Collisions from 1.350GeV to 2.125GeV. Nucl.Phys., B152:215, 1979.
π+π−π0π0 and π+π−η at BABA R June 2017 35 / 20
[4]
Update of the hadronic vacuum polarization contribution to the muon g − 2. Nuclear and Particle Physics Proceedings, 287-288:70 – 75, 2017. The 14th International Workshop on Tau Lepton Physics. [5]
Updated estimate of the muon magnetic moment using revised results from e+e− annihilation.
[6]
Reevaluation of the Hadronic Contributions to the Muon g − 2 and to α(MZ). Eur.Phys.J., C71:1515, 2011.
π+π−π0π0 and π+π−η at BABA R June 2017 36 / 20
[7]
Study of e+e− annihilation to hadrons at low energies at BaBar. EPJ Web Conf., 142:01013, 2017. [8]
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