Study of B0 (s) → K0 S h+h'- decays with first observation of B0 s → K0 S K± π± and B0 s → K0 S π+ π-


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Aaij R., Adeva B., Adinolfi M., Adrover C., Affolder A., Ajaltouni Z., ...Daha Fazla

Journal of High Energy Physics, cilt.2013, sa.10, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2013 Sayı: 10
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1007/jhep10(2013)143
  • Dergi Adı: Journal of High Energy Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Hadron-Hadron Scattering, Branching fraction, B physics, Flavor physics
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

A search for charmless three-body decays of B0 and B 0s mesons with a K0 S meson in the final state is performed using the pp collision data, corresponding to an integrated luminosity of 1:0 fb-1, collected at a centre-of-mass energy of 7TeV recorded by the LHCb experiment. Branching fractions of the B0 (s) → K0 S h+h'- decay modes (h(') = π,K), relative to the well measured B 0 → K0 Sπ+π- decay, are obtained. First observation of the decay modes B0 s → K0S K±π ± and B0 s → K0 Sπ+ π- and confirmation of the decay B0 → K0 SK±π ± are reported. The following relative branching fraction measurements or limits are obtained B(B0 → K0 S K±π±)/B(B0 → K0 Sπ+ π-)=0:128 ± 0:017 (stat:) ± 0:009 (syst:) ; B(B0 → K0 S K+K-)/B(B0 → K0 Sπ+ π-)= 0:385 ± 0:031 (stat:) ± 0:023 (syst:) ; B(B0s → K0 Sπ+ π-)/B(B0 → K 0 Sπ+ π-)=0:29 ± 0:06 (stat:) ± 0:03 (syst:) ± 0:02 (fs=fd) ; B(B0 s → K0 sK±π ±)/B(B0 → K0Sπ +π-)= = 1:48 ± 0:12 (stat:) ± 0:08 (syst:) ± 0:12 (fs=fd) ; B(B0s → K0 SK+K-)/B(B0 → K 0Sπ+π-)ε [0:004; 0:068] at 90% CL.