RT Journal Article
T1 First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK + μ + μ −
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor Manuel
A1 Gallas Torreira, Abraham Antonio
A1 García Pardiñas, Julián
A1 Hernando Morata, José Ángel
A1 Pazos Álvarez, Antonio
A1 Pérez Trigo, Eliseo
A1 Plo Casasus, Máximo
A1 Rodríguez Pérez, Pablo
A1 Romero Vidal, Antonio
A1 Vázquez Regueiro, Pablo
A1 Vázquez Sierra, Carlos
K1 Rare decay
K1 Hadron-Hadron Scattering
K1 B physics
K1 Flavor physics
AB First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK +μ+μ− are presented using data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The branching fractions of the decays areB(B+→K+π+π−μ+μ−)=(4.36−0.29−0.27(stat)±0.21 (syst)±0.18(norm))×10−7,B(B+→ϕK+μ+μ−)=(0.82−0.19−0.17(stat)−0.10−0.04(syst)±0.27(norm))×10−7,where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. A measurement of the differential branching fraction in bins of the invariant mass squared of the dimuon system is also presented for the decay B + → K + π + π − μ + μ −.
PB Springer
SN 1029-8479
YR 2014
FD 2014
LK http://hdl.handle.net/10347/21987
UL http://hdl.handle.net/10347/21987
LA eng
NO Aaij, R., Adeva, B., Adinolfi, M. et al. First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK + μ + μ − . J. High Energ. Phys. 2014, 64 (2014). https://doi.org/10.1007/JHEP10(2014)064
DS Minerva
RD 30 abr 2026