Simulation Study of \(B \rightarrow K\ell \ell (')\) at Belle

  • S. ChoudhuryEmail author
  • S. Sandilya
  • K. Trabelsi
  • A. Giri
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 234)


We report the simulation study of \(R_{K}\) for \(B^{+}B^{-}\) and \(B^{0}\bar{B^{0}}\) at Belle. The \(R_{K}\) \((J/\psi )\) is measured for Belle full data sample \(772 \times 10^{6}\) \(B\bar{B}\) pairs and is consistant with unity. The \(R_{K}\) measurement for \(B \rightarrow K\ell \ell \) is an important probe to search for New Physics (NP). In lot of NP models LFU violation comes together with LFV. We are also searching for LFV in \(B \rightarrow K \mu e\) and \(B \rightarrow K e \mu \).



We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); NSFC and CCEPP (China), MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project and GSDC of KISTI (Korea); MNiSW and NCN (Poland); MES and RFAAE (Russia); ARRS (Slovenia); IKERBASQUE and MINECO (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (USA).


  1. 1.
    LHCb Collaboration, Angular analysis of the \(B^0 \rightarrow K^{\ast 0}\mu ^{\pm }\mu ^{\mp }\) decay using \(3fb^{-1}\) of integrated luminosity. arXiv:1512.04442
  2. 2.
    Belle Collaboration, \(Lepton\)-\(flavor\)-\(dependent\) angular analysis of \(B \rightarrow K^{\ast 0}\ell ^{\pm }\ell ^{\mp }\). arXiv:1612.05014
  3. 3.
    Belle Collaboration, A. Abashian et al., Nucl. Instr. and Meth. A479, 117 (2002)Google Scholar
  4. 4.
    A. Ali, Patricia Ball, L.T. Handoko, G. Hiller, Phys. Rev. D 61, 074024 (2000)Google Scholar
  5. 5.
    D.J. Lange, Nucl. Instrum. Methods Phys. Res. Sect. A 462, 152 (2001)Google Scholar
  6. 6.
    R. Brun et al., GEANT, CERN Report No. DD/EE/84-1 (1984)Google Scholar
  7. 7.
    M. Feindt et al., A hierarchical neurobayes-based algorithm for full reconstruction of \(b\) mesons at \(b\) factoriesGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • S. Choudhury
    • 1
    Email author
  • S. Sandilya
    • 3
  • K. Trabelsi
    • 2
  • A. Giri
    • 1
  1. 1.IIT HyderabadHyderabadIndia
  2. 2.KEKTsukubaJapan
  3. 3.University of CincinnatiCincinnatiUSA

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