4.7 Article

Search for the rare decays B → πl+l- and B0 → ηl+l-

期刊

PHYSICAL REVIEW D
卷 88, 期 3, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.032012

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资金

  1. SLAC
  2. U.S. Department of Energy and National Science Foundation
  3. Natural Sciences and Engineering Research Council (Canada)
  4. Commissariat a l'Energie Atomique
  5. Institut National de Physique Nucleaire et de Physique des Particules (France)
  6. Bundesministerium fur Bildung und Forschung (Germany)
  7. Deutsche Forschungsgemeinschaft (Germany)
  8. Istituto Nazionale di Fisica Nucleare (Italy)
  9. Foundation for Fundamental Research on Matter (Netherlands)
  10. Research Council of Norway
  11. Ministry of Education and Science of the Russian Federation
  12. Ministerio de Economia y Competitividad (Spain)
  13. Science and Technology Facilities Council (United Kingdom)
  14. Marie-Curie IEF program (European Union)
  15. A. P. Sloan Foundation (USA)
  16. STFC [ST/K001604/1, ST/H001085/1, PP/E000460/1, ST/H001085/2, ST/J005568/1, ST/K000748/1] Funding Source: UKRI
  17. Science and Technology Facilities Council [ST/H001085/2, ST/K001604/1, ST/K001604/1 T2K, ST/K001604/1 DMUK, ST/J005568/1, ST/K001604/1 LHCb Upgrades, ST/H001085/1, ST/K001604/1 LHCb, ST/K001604/1 SuperNEMO, ST/K001604/1 CMS Upgrade, PP/E000460/1, ST/K000748/1, ST/K001604/1 MICE/UKNF, ST/K001604/1 GRIDPP] Funding Source: researchfish
  18. Division Of Physics
  19. Direct For Mathematical & Physical Scien [0969487] Funding Source: National Science Foundation

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We present the results of a search for the rare flavor-changing neutral-current decays B -> pi l(+)l(-) (pi = pi(+), pi(0) and l = e, mu) and B-0 -> eta l(+)l(-) using a sample of e(+)e(-) -> Upsilon(4S) -> B (B) over bar decays corresponding to 428 fb(-1) of integrated luminosity collected by the BABAR detector. No significant signal is observed, and we set an upper limit on the isospin and lepton-flavor averaged branching fraction of B(B -> pi l(+)l(-)) < 5.9 x 10(-8) and a lepton-flavor averaged upper limit of B(B-0 -> eta l(+)l(-)) < 6.4 x 10(-8), both at the 90% confidence level. We also report 90% confidence level branching fraction upper limits for the individual modes B+ -> pi(+)e(+)e(-), B-0 -> pi(0)e(+)e(-), B-0 -> pi(+)mu(+)mu(-), B-0 -> pi(+)mu(+)mu(-), B-0 -> pi(0)mu(+)mu(-), B-0 -> eta e(+)e(-), and B-0 ->eta mu(+)mu(-).

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