4.8 Article

Measurements of the Angular Distributions in the Decays B → K(*)μ+μ- at CDF

期刊

PHYSICAL REVIEW LETTERS
卷 108, 期 8, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.081807

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资金

  1. U.S. Department of Energy
  2. National Science Foundation
  3. Italian Istituto Nazionale di Fisica Nucleare
  4. Ministry of Education, Culture, Sports, Science and Technology of Japan
  5. Natural Sciences and Engineering Research Council of Canada
  6. National Science Council of the Republic of China
  7. Swiss National Science Foundation
  8. A.P. Sloan Foundation
  9. Bundesministerium fur Bildung und Forschung, Germany
  10. Korean World Class University Program
  11. National Research Foundation of Korea
  12. Science and Technology Facilities Council
  13. Royal Society, United Kingdom
  14. Institut National de Physique Nucleaire et Physique des Particules/CNRS
  15. Russian Foundation for Basic Research
  16. Ministerio de Ciencia e Innovacion, and Programa Consolider-Ingenio 2010, Spain
  17. Slovak RD Agency
  18. Academy of Finland
  19. Science and Technology Facilities Council [ST/H001026/2, ST/H001069/2, ST/H001026/1, PP/E003699/1, ST/K001418/1, PP/E003699/2, ST/M001474/1] Funding Source: researchfish
  20. STFC [ST/H001026/1, PP/E003699/2, ST/H001069/2, PP/E003699/1, ST/H001026/2] Funding Source: UKRI
  21. Grants-in-Aid for Scientific Research [22740139] Funding Source: KAKEN

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We report an indirect search for nonstandard model physics using the flavor-changing neutral current decays B -> K-(*)mu(+)mu(-). We reconstruct the decays and measure their angular distributions, as a function of q(2) = M(mu mu)(2)c(2), where M-mu mu is the dimuon mass, in p (P) over bar collisions at root s = 1.96 Tev using a data sample corresponding to an integrated luminosity of 6.8 fb(-1). The transverse polarization asymmetry A(T)((2)) and the time-reversal-odd charge-and-parity asymmetry A(im) are measured for the first time, together with the K* longitudinal polarization fraction F-L and the muon forward-backward asymmetry A(FB) for the decays B-0 -> K*(0)mu(+)mu(-) and B -> K*(+)mu(+)mu(-). The B -> K*mu(+)mu(-) forward-backward asymmetry in the most sensitive kinematic regime, 1 <= q(2) < 6 GeV2/c(2), is measured to be A(FB) 0.29(-0.23)(+0.20) (stat) +/- 0.07 (syst), the most precise result to date. No deviations from the standard model predictions are observed.

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