What is recorded here?
The BABAR and Belle collaborations independently measured time-dependent differences in selected flavor-tagged neutral B and anti-B decays. BABAR reported sin(2β) = 0.59 ± 0.14 statistically ± 0.05 systematically; Belle reported sin(2φ1) = 0.99 ± 0.14 statistically ± 0.06 systematically. The angles β and φ1 use different names for the same standard-model parameter.
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Scientific scope
BABAR and Belle used separate detectors, samples and collaboration bylines; these initial central values should not be silently averaged. Their 32 million and 31.3 million B-pair figures are collision samples, not selected signal counts. Belle fixed mixing and lifetime inputs in its likelihood and reports more than six sigma against zero; BABAR reports 4.1 sigma under its own uncertainty treatment. Flavor tagging, vertex resolution, backgrounds and fit assumptions matter. Both followed kaon CP violation and earlier B measurements. Observed neutral-B CP asymmetry does not by itself explain the cosmic matter-antimatter imbalance. The individual author lists shown for the two collaborations are incomplete. Similar initials do not establish that two contributors are the same person.
Read the original work
- Observation of CP violation in the B0 meson system
- Observation of Large CP Violation in the Neutral B Meson System (v1)
- Observation of Large CP Violation in the Neutral B Meson System (v2)
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People and systems
B. Aubert; D. Boutigny; J.-M. Gaillard; R. Abe; I. Adachi
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged. The recorded author list is incomplete.
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English catalogue narrative
Independent B-factory observations of time-dependent CP asymmetry in neutral B mesons
The BABAR and Belle collaborations independently measured time-dependent differences in selected flavor-tagged neutral B and anti-B decays. BABAR reported sin(2β) = 0.59 ± 0.14 statistically ± 0.05 systematically; Belle reported sin(2φ1) = 0.99 ± 0.14 statistically ± 0.06 systematically. The angles β and φ1 use different names for the same standard-model parameter.
Scientific scope
BABAR and Belle used separate detectors, samples and collaboration bylines; these initial central values should not be silently averaged. Their 32 million and 31.3 million B-pair figures are collision samples, not selected signal counts. Belle fixed mixing and lifetime inputs in its likelihood and reports more than six sigma against zero; BABAR reports 4.1 sigma under its own uncertainty treatment. Flavor tagging, vertex resolution, backgrounds and fit assumptions matter. Both followed kaon CP violation and earlier B measurements. Observed neutral-B CP asymmetry does not by itself explain the cosmic matter-antimatter imbalance. The individual author lists shown for the two collaborations are incomplete. Similar initials do not establish that two contributors are the same person.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
B. Aubert; D. Boutigny; J.-M. Gaillard; R. Abe; I. Adachi
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.