Catalog · Secondary · B007

B007 $B_s^0 \to e^+ e^-, B^0 \to e^+ e^-$

Rare electronic leptonic neutral-B decays

Status REVIEWED VERIFIED Medium Code: NO Priority Low

PDG / equivalent values

Observable	Value	Year	Experiment / source	Provenance
$BR(B_s0 \to $ e+e-)	9.4e-9 branching fraction 90% CL (upper)	2026	PDG2026_BsBdEe	source ↑
BR(B0 $ \to $ e+e-)	2.5e-9 branching fraction 90% CL (upper)	2026	PDG2026_BsBdEe	source ↑
$BR(B_s0 \to $ e+e-)	1.12e-8 branching fraction 95% CL (upper)	2020	LHCb2020_BsBdEe	source ↑
BR(B0 $ \to $ e+e-)	3e-9 branching fraction 95% CL (upper)	2020	LHCb2020_BsBdEe	source ↑
$BR(B_s0 \to $ e+e-)	2.8e-7 branching fraction 90% CL (upper)	2009	CDF2009_BsBdEe	source ↑
BR(B0 $ \to $ e+e-)	8.3e-8 branching fraction 90% CL (upper)	2009	CDF2009_BsBdEe	source ↑
BR(B0 $ \to $ e+e-)	1.13e-7 branching fraction 90% CL (upper)	2008	BaBar2008_BdEe	source ↑
BR(B0 $ \to $ e+e-)	1.9e-7 branching fraction 90% CL (upper)	2003	PDG2026_BsBdEe	source ↑

Why this constrains the RS scan

SECONDARY tier. Per flavor\_catalog/PRIORITY\_TIERS.md, this process is a deferred this catalog wave promotion: it is less urgent than the this catalog wave--7 PRIMARY set, but it probes an electron-specific direction absent from $B005/B006$. In anarchic RS models, non-universal fermion localization generates flavor-changing $Z$, KK electroweak-gauge, Higgs, radion, or other scalar exchanges after rotating to the mass basis. Axial-vector contributions remain helicity suppressed in the Standard Model pattern, while scalar and pseudoscalar operators can be chirality enhanced relative to the electronic SM amplitude. The mode is therefore a useful handle on electron-sector misalignment and on any 5D-Yukawa or brane-Higgs structure that feeds $C_S^{(\prime)}$ or $C_P^{(\prime)}$ differently from $C_{10}^{(\prime)}$.

What's changed since the original paper

The CFW RS-flavor baseline is arXiv:0804.1954 (CsakiFalkowskiWeiler2008\_RSFlavor); its quoted KK reference scales are theory anchors and are kept out of pdg\_or\_equivalent. The experimental landscape then moved through CDF's arXiv:0901.3803 search, which set the previous $B_s^0$ and $B^0$ electronic limits later superseded by LHCb. BaBar's arXiv:0712.1516 and Belle's older $B^0\to e^+e^-$ bound remain historical $B_d$-mode context in the PDG table. Bobeth et al., arXiv:1311.0903, supplied the reduced-uncertainty SM $B_{s,d}\to\ell^+\ell^-$ predictions and made explicit that the electron modes are suppressed by the lepton mass in the SM. Fleischer, Jaarsma, and Tetlalmatzi-Xolocotzi, arXiv:1703.10160, emphasized that new physics in the $B_{s,d}\to e^+e^-$ channels can be much less suppressed than the SM electron amplitude in scalar/pseudoscalar scenarios. LHCb's arXiv:2003.03999 search is the decisive post-2008 experimental update and supersedes the previous CDF limits.

Validity and model dependence

The canonical observables are robust experimental upper limits, but their model interpretation is not a direct neutral-meson-mixing constraint. The LHCb limits are quoted one channel at a time, assuming no contribution from the other neutral-$B$ electronic mode, and the $B_s^0$ result assumes the mean $B_s^0$ lifetime; the paper reports a $2.4\%$ shift for SM-like CP-odd or CP-even alternatives. A production RS implementation needs a consistent $\Delta B=1$ Hamiltonian, the $B_q$ decay constants and CKM inputs as theory inputs, a convention for electron bremsstrahlung/QED effects, and separate scalar and pseudoscalar Wilson coefficients. The limits are strongest as exclusions on large electron-specific scalar/pseudoscalar amplitudes rather than as precision tests of the tiny SM prediction.

Code coverage in this repo

NO. The required greps over quarkConstraints/, qcd/, flavorConstraints/, neutrinos/, yukawa/, warpConfig/, solvers/, scanParams/, and tests/ found no $B_s^0\to e^+e^-$, $B^0\to e^+e^-$, $b\to s e e$, or $b\to d e e$ rare-decay implementation. The exact nearby hits are neutral $B_d/B_s$ mixing inputs at quarkConstraints/deltaf2.py:225 and quarkConstraints/deltaf2.py:239, and the corresponding mixing evaluators at quarkConstraints/deltaf2.py:903 and quarkConstraints/deltaf2.py:922; they are $\Delta F=2$, not this $\Delta B=1$ electronic leptonic observable.

Linked evidence (opens GitHub blob at flavor-catalog-website/2026q2):

Implementation difficulty

MEDIUM. The first useful implementation can share the pure-leptonic $\Delta B=1$ machinery needed for $B005/B006$: $C_{10}^{(\prime)}$, $C_S^{(\prime)}$, $C_P^{(\prime)}$, $f_{B_q}$, lifetimes, CKM inputs, and a branching-ratio formula. The electron channel adds care around QED tails and the LHCb assumptions, but it does not require angular observables or exclusive form-factor likelihoods.

Key references

Process-local source keys before bibliography consolidation: PDG2026\_BsBdEe, LHCb2020\_BsBdEe, BobethEtAl2013\_BqllSM, CDF2009\_BsBdEe, FleischerJaarsmaTetlalmatziXolocotzi2017\_BqllNP, BaBar2008\_BdEe, and CsakiFalkowskiWeiler2008\_RSFlavor.

fallback_value_uncertainty BR(B_s0 -> e+e-) < 9.4e-9 90% CL

AMBIGUOUS

Match 1 of 4 snapshot line 11

L8: 
L9: PDG API listing S086.20
L10: Edition: 2026
L11: Description: B_s()0 --> e+ e-
L12: Related data: S086R18, G(B_s0 --> e+ e-)/G(total)
L13: Note: Test for DeltaB = 1 weak neutral current.
L14:

Match 2 of 4 snapshot line 12

L9: PDG API listing S086.20
L10: Edition: 2026
L11: Description: B_s()0 --> e+ e-
L12: Related data: S086R18, G(B_s0 --> e+ e-)/G(total)
L13: Note: Test for DeltaB = 1 weak neutral current.
L14: 
L15: Canonical measurement:

Match 3 of 4 snapshot line 25

L22:   confidence_level: 90.0
L23:   technique: LHCB
L24:   comment: p p at 7, 8, 13 TeV
L25:   VALUE: <9.4 E-9
L26:   numeric value: 9.4E-9
L27:   limit_type: U
L28:   used_in_average: true

Match 4 of 4 snapshot line 67

L64:   p pbar at 1.96 TeV.
L65:   AUBERT 2008P, PR D77 032007, BABR, 90.0 CL, VALUE <11.3 E-8,
L66:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.
L67:   AUBERT 2005W, PRL 94 221803, BABR, 90.0 CL, VALUE <6.1 E-8,
L68:   replaced by AUBERT 2008P.
L69:   CHANG 2003, PR D68 111101, BELLE, 90.0 CL, VALUE <1.9 E-7,
L70:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.

fallback_value_uncertainty BR(B0 -> e+e-) < 2.5e-9 90% CL

AMBIGUOUS

Match 1 of 10 snapshot line 21

L18:   publication_year: 2020
L19:   doi: 10.1103/PhysRevLett.124.211802
L20:   inspire_id: 1784438
L21:   title: Search for the Rare Decays B^0_s to e+e- and B^0 to e+e-
L22:   confidence_level: 90.0
L23:   technique: LHCB
L24:   comment: p p at 7, 8, 13 TeV

Match 2 of 10 snapshot line 26

L23:   technique: LHCB
L24:   comment: p p at 7, 8, 13 TeV
L25:   VALUE: <9.4 E-9
L26:   numeric value: 9.4E-9
L27:   limit_type: U
L28:   used_in_average: true
L29:   used_in_fit: true

Match 3 of 10 snapshot line 40

L37: 
L38: PDG API listing S042.6
L39: Edition: 2026
L40: Description: B0 --> e+ e-
L41: Related data: S042R6, G(B0 --> e+ e-)/G(total)
L42: Note: Test for DeltaB=1 weak neutral current. Allowed by higher-order
L43: electroweak interactions.

Match 4 of 10 snapshot line 41

L38: PDG API listing S042.6
L39: Edition: 2026
L40: Description: B0 --> e+ e-
L41: Related data: S042R6, G(B0 --> e+ e-)/G(total)
L42: Note: Test for DeltaB=1 weak neutral current. Allowed by higher-order
L43: electroweak interactions.
L44:

Match 5 of 10 snapshot line 51

L48:   publication_year: 2020
L49:   doi: 10.1103/PhysRevLett.124.211802
L50:   inspire_id: 1784438
L51:   title: Search for the Rare Decays B^0_s to e+e- and B^0 to e+e-
L52:   confidence_level: 90.0
L53:   technique: LHCB
L54:   comment: p p at 7, 8, 13 TeV

Match 6 of 10 snapshot line 55

L52:   confidence_level: 90.0
L53:   technique: LHCB
L54:   comment: p p at 7, 8, 13 TeV
L55:   VALUE: <2.5 E-9
L56:   numeric value: 2.5E-9
L57:   limit_type: U
L58:   used_in_average: true

Match 7 of 10 snapshot line 56

L53:   technique: LHCB
L54:   comment: p p at 7, 8, 13 TeV
L55:   VALUE: <2.5 E-9
L56:   numeric value: 2.5E-9
L57:   limit_type: U
L58:   used_in_average: true
L59:   used_in_fit: true

Match 8 of 10 snapshot line 60

L57:   limit_type: U
L58:   used_in_average: true
L59:   used_in_fit: true
L60:   footnote: Assumes no contribution from B_s()0 --> e+ e- decays.
L61: 
L62: Prior PDG-listed measurements:
L63:   AALTONEN 2009P, PRL 102 201801, CDF, 90.0 CL, VALUE <8.3 E-8,

Match 9 of 10 snapshot line 66

L63:   AALTONEN 2009P, PRL 102 201801, CDF, 90.0 CL, VALUE <8.3 E-8,
L64:   p pbar at 1.96 TeV.
L65:   AUBERT 2008P, PR D77 032007, BABR, 90.0 CL, VALUE <11.3 E-8,
L66:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.
L67:   AUBERT 2005W, PRL 94 221803, BABR, 90.0 CL, VALUE <6.1 E-8,
L68:   replaced by AUBERT 2008P.
L69:   CHANG 2003, PR D68 111101, BELLE, 90.0 CL, VALUE <1.9 E-7,

Match 10 of 10 snapshot line 70

L67:   AUBERT 2005W, PRL 94 221803, BABR, 90.0 CL, VALUE <6.1 E-8,
L68:   replaced by AUBERT 2008P.
L69:   CHANG 2003, PR D68 111101, BELLE, 90.0 CL, VALUE <1.9 E-7,
L70:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.

fallback_value_uncertainty BR(B_s0 -> e+e-) < 1.12e-8 95% CL

AMBIGUOUS

Match 1 of 4 snapshot line 19

L16:   No signal is observed.
L17: 
L18:   Assuming no contribution from B0 -> e+e- decays:
L19:     B(Bs0 -> e+e-) < 9.4 (11.2) x 10^-9 at 90 (95)% CL.
L20: 
L21:   Assuming no contribution from Bs0 -> e+e- decays:
L22:     B(B0 -> e+e-) < 2.5 (3.0) x 10^-9 at 90 (95)% CL.

Match 2 of 4 snapshot line 22

L19:     B(Bs0 -> e+e-) < 9.4 (11.2) x 10^-9 at 90 (95)% CL.
L20: 
L21:   Assuming no contribution from Bs0 -> e+e- decays:
L22:     B(B0 -> e+e-) < 2.5 (3.0) x 10^-9 at 90 (95)% CL.
L23: 
L24: Context from the paper introduction:
L25:   Standard Model predictions quoted by LHCb, calculated from Ref. [9]

Match 3 of 4 snapshot line 33

L30:   With contributions beyond the SM, these branching fractions could be
L31:   significantly larger and close to then-current experimental bounds.
L32:   The previous CDF bounds quoted by LHCb were:
L33:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L34:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.
L35: 
L36: Conclusion/context:

Match 4 of 4 snapshot line 34

L31:   significantly larger and close to then-current experimental bounds.
L32:   The previous CDF bounds quoted by LHCb were:
L33:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L34:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.
L35: 
L36: Conclusion/context:
L37:   The search uses a total integrated luminosity of 5 fb^-1.  Assuming

fallback_value_uncertainty BR(B0 -> e+e-) < 3e-9 95% CL

AMBIGUOUS

Match 1 of 14 snapshot line 3

L1: Source: arXiv abstract page and local pdftotext extract
L2: Access date: 2026-05-17
L3: URL: https://arxiv.org/abs/2003.03999
L4: arXiv: 2003.03999
L5: DOI: 10.1103/PhysRevLett.124.211802
L6: Title: Search for the rare decays B^0_s -> e+e- and B^0 -> e+e-

Match 2 of 14 snapshot line 4

L1: Source: arXiv abstract page and local pdftotext extract
L2: Access date: 2026-05-17
L3: URL: https://arxiv.org/abs/2003.03999
L4: arXiv: 2003.03999
L5: DOI: 10.1103/PhysRevLett.124.211802
L6: Title: Search for the rare decays B^0_s -> e+e- and B^0 -> e+e-
L7: Authors: LHCb Collaboration, R. Aaij et al.

Match 3 of 14 snapshot line 5

L2: Access date: 2026-05-17
L3: URL: https://arxiv.org/abs/2003.03999
L4: arXiv: 2003.03999
L5: DOI: 10.1103/PhysRevLett.124.211802
L6: Title: Search for the rare decays B^0_s -> e+e- and B^0 -> e+e-
L7: Authors: LHCb Collaboration, R. Aaij et al.
L8: Publication: Phys. Rev. Lett. 124 (2020) 211802

Match 4 of 14 snapshot line 6

L3: URL: https://arxiv.org/abs/2003.03999
L4: arXiv: 2003.03999
L5: DOI: 10.1103/PhysRevLett.124.211802
L6: Title: Search for the rare decays B^0_s -> e+e- and B^0 -> e+e-
L7: Authors: LHCb Collaboration, R. Aaij et al.
L8: Publication: Phys. Rev. Lett. 124 (2020) 211802
L9:

Match 5 of 14 snapshot line 13

L10: Minimal extract for B007.
L11: 
L12: Abstract/result:
L13:   A search for Bs0 -> e+ e- and B0 -> e+ e- is performed using LHCb
L14:   proton-proton data at center-of-mass energies of 7, 8, and 13 TeV,
L15:   corresponding to integrated luminosities of 1, 2, and 2 fb^-1.
L16:   No signal is observed.

Match 6 of 14 snapshot line 14

L11: 
L12: Abstract/result:
L13:   A search for Bs0 -> e+ e- and B0 -> e+ e- is performed using LHCb
L14:   proton-proton data at center-of-mass energies of 7, 8, and 13 TeV,
L15:   corresponding to integrated luminosities of 1, 2, and 2 fb^-1.
L16:   No signal is observed.
L17:

Match 7 of 14 snapshot line 18

L15:   corresponding to integrated luminosities of 1, 2, and 2 fb^-1.
L16:   No signal is observed.
L17: 
L18:   Assuming no contribution from B0 -> e+e- decays:
L19:     B(Bs0 -> e+e-) < 9.4 (11.2) x 10^-9 at 90 (95)% CL.
L20: 
L21:   Assuming no contribution from Bs0 -> e+e- decays:

Match 8 of 14 snapshot line 19

L16:   No signal is observed.
L17: 
L18:   Assuming no contribution from B0 -> e+e- decays:
L19:     B(Bs0 -> e+e-) < 9.4 (11.2) x 10^-9 at 90 (95)% CL.
L20: 
L21:   Assuming no contribution from Bs0 -> e+e- decays:
L22:     B(B0 -> e+e-) < 2.5 (3.0) x 10^-9 at 90 (95)% CL.

Match 9 of 14 snapshot line 21

L18:   Assuming no contribution from B0 -> e+e- decays:
L19:     B(Bs0 -> e+e-) < 9.4 (11.2) x 10^-9 at 90 (95)% CL.
L20: 
L21:   Assuming no contribution from Bs0 -> e+e- decays:
L22:     B(B0 -> e+e-) < 2.5 (3.0) x 10^-9 at 90 (95)% CL.
L23: 
L24: Context from the paper introduction:

Match 10 of 14 snapshot line 22

L19:     B(Bs0 -> e+e-) < 9.4 (11.2) x 10^-9 at 90 (95)% CL.
L20: 
L21:   Assuming no contribution from Bs0 -> e+e- decays:
L22:     B(B0 -> e+e-) < 2.5 (3.0) x 10^-9 at 90 (95)% CL.
L23: 
L24: Context from the paper introduction:
L25:   Standard Model predictions quoted by LHCb, calculated from Ref. [9]

Match 11 of 14 snapshot line 27

L24: Context from the paper introduction:
L25:   Standard Model predictions quoted by LHCb, calculated from Ref. [9]
L26:   and neglecting QED corrections expected at the percent level:
L27:     B(Bs0 -> e+e-) = (8.60 +- 0.36) x 10^-14.
L28:     B(B0 -> e+e-) = (2.41 +- 0.13) x 10^-15.
L29: 
L30:   With contributions beyond the SM, these branching fractions could be

Match 12 of 14 snapshot line 28

L25:   Standard Model predictions quoted by LHCb, calculated from Ref. [9]
L26:   and neglecting QED corrections expected at the percent level:
L27:     B(Bs0 -> e+e-) = (8.60 +- 0.36) x 10^-14.
L28:     B(B0 -> e+e-) = (2.41 +- 0.13) x 10^-15.
L29: 
L30:   With contributions beyond the SM, these branching fractions could be
L31:   significantly larger and close to then-current experimental bounds.

Match 13 of 14 snapshot line 33

L30:   With contributions beyond the SM, these branching fractions could be
L31:   significantly larger and close to then-current experimental bounds.
L32:   The previous CDF bounds quoted by LHCb were:
L33:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L34:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.
L35: 
L36: Conclusion/context:

Match 14 of 14 snapshot line 34

L31:   significantly larger and close to then-current experimental bounds.
L32:   The previous CDF bounds quoted by LHCb were:
L33:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L34:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.
L35: 
L36: Conclusion/context:
L37:   The search uses a total integrated luminosity of 5 fb^-1.  Assuming

fallback_value_uncertainty BR(B_s0 -> e+e-) < 2.8e-7 90% CL

RESOLVED

Match snapshot line 22

L19:   limits should appear.  The exact B^0_(s) -> e+e- numerical values are
L20:   taken from the PDG API extract and from the LHCb 2020 paper's reference
L21:   to this CDF result:
L22:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L23:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.

fallback_value_uncertainty BR(B0 -> e+e-) < 8.3e-8 90% CL

AMBIGUOUS

Match 1 of 7 snapshot line 6

L3: URL: https://arxiv.org/abs/0901.3803
L4: arXiv: 0901.3803
L5: DOI: 10.1103/PhysRevLett.102.201801
L6: Title: Search for the Decays B^0_(s) -> e+mu- and B^0_(s) -> e+e- in CDF Run II
L7: Authors: CDF Collaboration, T. Aaltonen et al.
L8: 
L9: Minimal extract for B007.

Match 2 of 7 snapshot line 12

L9: Minimal extract for B007.
L10: 
L11: Abstract/context:
L12:   The CDF Run II search covers lepton-flavor-violating B^0_(s) -> e+mu-
L13:   and flavor-changing neutral-current B^0_(s) -> e+e- decays.  It used
L14:   2 fb^-1 of p pbar collisions at sqrt(s) = 1.96 TeV collected with CDF II.
L15:   The observed number of B^0_(s) candidates was consistent with background.

Match 3 of 7 snapshot line 13

L10: 
L11: Abstract/context:
L12:   The CDF Run II search covers lepton-flavor-violating B^0_(s) -> e+mu-
L13:   and flavor-changing neutral-current B^0_(s) -> e+e- decays.  It used
L14:   2 fb^-1 of p pbar collisions at sqrt(s) = 1.96 TeV collected with CDF II.
L15:   The observed number of B^0_(s) candidates was consistent with background.
L16:

Match 4 of 7 snapshot line 15

L12:   The CDF Run II search covers lepton-flavor-violating B^0_(s) -> e+mu-
L13:   and flavor-changing neutral-current B^0_(s) -> e+e- decays.  It used
L14:   2 fb^-1 of p pbar collisions at sqrt(s) = 1.96 TeV collected with CDF II.
L15:   The observed number of B^0_(s) candidates was consistent with background.
L16: 
L17: Exact electronic limits used for B007:
L18:   The arXiv abstract metadata repeats the e+mu limit text where the e+e-

Match 5 of 7 snapshot line 19

L16: 
L17: Exact electronic limits used for B007:
L18:   The arXiv abstract metadata repeats the e+mu limit text where the e+e-
L19:   limits should appear.  The exact B^0_(s) -> e+e- numerical values are
L20:   taken from the PDG API extract and from the LHCb 2020 paper's reference
L21:   to this CDF result:
L22:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.

Match 6 of 7 snapshot line 22

L19:   limits should appear.  The exact B^0_(s) -> e+e- numerical values are
L20:   taken from the PDG API extract and from the LHCb 2020 paper's reference
L21:   to this CDF result:
L22:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L23:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.

Match 7 of 7 snapshot line 23

L20:   taken from the PDG API extract and from the LHCb 2020 paper's reference
L21:   to this CDF result:
L22:     B(Bs0 -> e+e-) < 2.8 x 10^-7 at 90% CL.
L23:     B(B0 -> e+e-) < 8.3 x 10^-8 at 90% CL.

fallback_value_uncertainty BR(B0 -> e+e-) < 1.13e-7 90% CL

AMBIGUOUS

Match 1 of 3 snapshot line 15

L12:   BABAR searched for B0 -> e+e-, B0 -> mu+mu-, and B0 -> e mu using
L13:   data corresponding to 384 x 10^6 BBbar pairs.  No evidence was found.
L14:   The 90% CL upper limits included:
L15:     B(B0 -> e+e-) < 11.3 x 10^-8.
L16:     B(B0 -> mu+mu-) < 5.2 x 10^-8.
L17:     B(B0 -> e mu) < 9.2 x 10^-8.

Match 2 of 3 snapshot line 16

L13:   data corresponding to 384 x 10^6 BBbar pairs.  No evidence was found.
L14:   The 90% CL upper limits included:
L15:     B(B0 -> e+e-) < 11.3 x 10^-8.
L16:     B(B0 -> mu+mu-) < 5.2 x 10^-8.
L17:     B(B0 -> e mu) < 9.2 x 10^-8.

Match 3 of 3 snapshot line 17

L14:   The 90% CL upper limits included:
L15:     B(B0 -> e+e-) < 11.3 x 10^-8.
L16:     B(B0 -> mu+mu-) < 5.2 x 10^-8.
L17:     B(B0 -> e mu) < 9.2 x 10^-8.

fallback_value_uncertainty BR(B0 -> e+e-) < 1.9e-7 90% CL

AMBIGUOUS

Match 1 of 4 snapshot line 34

L31: 
L32: Prior PDG-listed measurements:
L33:   AALTONEN 2009P, PRL 102 201801, CDF, 90.0 CL, VALUE <2.8 E-7,
L34:   p pbar at 1.96 TeV.
L35:   ACCIARRI 1997B, PL B391 474, L3, 90.0 CL, VALUE <5.4 E-5,
L36:   e+ e- --> Z.
L37:

Match 2 of 4 snapshot line 35

L32: Prior PDG-listed measurements:
L33:   AALTONEN 2009P, PRL 102 201801, CDF, 90.0 CL, VALUE <2.8 E-7,
L34:   p pbar at 1.96 TeV.
L35:   ACCIARRI 1997B, PL B391 474, L3, 90.0 CL, VALUE <5.4 E-5,
L36:   e+ e- --> Z.
L37: 
L38: PDG API listing S042.6

Match 3 of 4 snapshot line 64

L61: 
L62: Prior PDG-listed measurements:
L63:   AALTONEN 2009P, PRL 102 201801, CDF, 90.0 CL, VALUE <8.3 E-8,
L64:   p pbar at 1.96 TeV.
L65:   AUBERT 2008P, PR D77 032007, BABR, 90.0 CL, VALUE <11.3 E-8,
L66:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.
L67:   AUBERT 2005W, PRL 94 221803, BABR, 90.0 CL, VALUE <6.1 E-8,

Match 4 of 4 snapshot line 69

L66:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.
L67:   AUBERT 2005W, PRL 94 221803, BABR, 90.0 CL, VALUE <6.1 E-8,
L68:   replaced by AUBERT 2008P.
L69:   CHANG 2003, PR D68 111101, BELLE, 90.0 CL, VALUE <1.9 E-7,
L70:   e+ e- --> Upsilon(4S), assumes equal production of B+ and B0.