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Measurement of the B → Xl+l- Branching fraction and search for direct CP violation from a sum of exclusive final states

Lees, JP
•
Poireau, V
•
Tisserand, V
altro
Wu, SL
2014
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We measure the total branching fraction of the flavor-changing neutral-current process B -> X(s)l(+)l(-), along with partial branching fractions in bins of dilepton and hadronic system (X-s) mass, using a sample of 471 x 10(6)Upsilon(4S) -> B (B) over bar events recorded with the BABAR detector. The admixture of charged and neutral B mesons produced at PEP-II2 are reconstructed by combining a dilepton pair with 10 different X-s final states. Extrapolating from a sum over these exclusive modes, we measure a lepton-flavor-averaged inclusive branching fraction B(B -> X(s)l(+)l(-)) = [6.73(-0.64)(+0.70)(stat)(-0.25)(+0.34)(exp syst) +/- 0.50(model syst)] x 10(-6) for m(l+l-)(2) > 0.1 GeV2/c(4). Restricting our analysis exclusively to final states from which a decaying B meson's flavor can be inferred, we additionally report measurements of the direct CP asymmetry A(CP) in bins of dilepton mass; over the full dilepton mass range, we find A(CP) = 0.04 +/- 0.11 +/- 0.01 for a leptonflavor-averaged sample.
DOI
10.1103/PhysRevLett.112.211802
WOS
WOS:000338034400002
Archivio
http://hdl.handle.net/11368/2860985
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84901938176
http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.112.211802/apsxml
Diritti
metadata only access
Soggetti
  • B mesons, flavor-chan...

Scopus© citazioni
96
Data di acquisizione
Jun 14, 2022
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Web of Science© citazioni
94
Data di acquisizione
Mar 25, 2024
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