Measurement of the phase difference between short- and long-distance amplitudes in the B<SUP>+</SUP> → K<SUP>+</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> decay



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G
et al (show 758 more authors) (2017) Measurement of the phase difference between short- and long-distance amplitudes in the B<SUP>+</SUP> → K<SUP>+</SUP> μ<SUP>+</SUP> μ<SUP>-</SUP> decay. EUROPEAN PHYSICAL JOURNAL C, 77 (3). pp. 1-15.

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Abstract

A measurement of the phase difference between the short- and long-distance contributions to the [Formula: see text] decay is performed by analysing the dimuon mass distribution. The analysis is based on <i>pp</i> collision data corresponding to an integrated luminosity of 3[Formula: see text] collected by the LHCb experiment in 2011 and 2012. The long-distance contribution to the [Formula: see text] 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 [Formula: see text] and [Formula: see text] 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, [Formula: see text] and [Formula: see text], and the branching fraction of the short-distance component is measured.

Item Type: Article
Additional Information: 23 pages, 4 figures, published in EPJC. All figures and tables, along with any supplementary material and additional information, are available at http://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-045.html
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 18 Apr 2017 10:09
Last Modified: 14 Mar 2024 23:44
DOI: 10.1140/epjc/s10052-017-4703-2
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006991