TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2017
DA  - 2017//
TI  - Measurement of the phase difference between short- and long-distance amplitudes in the B+ -> K+ mu(+) mu(-) decay
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 161 - 15pp
VL  - 77
IS  - 3
PB  - Springer
AB  - A measurement of the phase difference between the short- and long-distance contributions to the decay is performed by analysing the dimuon mass distribution. The analysis is based on pp collision data corresponding to an integrated luminosity of 3 collected by the LHCb experiment in 2011 and 2012. The long-distance contribution to the decay is modelled as a sum of relativistic Breit-Wigner amplitudes representing different vector meson resonances decaying to muon pairs, each with their own magnitude and phase. The measured phases of the and resonances are such that the interference with the short-distance component in dimuon mass regions far from their pole masses is small. In addition, constraints are placed on the Wilson coefficients, and , and the branching fraction of the short-distance component is measured.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1612.06764
UR  - https://doi.org/10.1140/epjc/s10052-017-4703-2
DO  - 10.1140/epjc/s10052-017-4703-2
LA  - English
N1  - WOS:000398734200001
ID  - LHCbCollaborationAaij_etal2017
ER  -