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Measurement of the phase difference between short- and long-distance amplitudes in the B+→ K+µ+µ− decay
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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Costa Sobral, Cayo, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Latham, Thomas, Loh, David, Mathad, Abhijit , O'Hanlon, Daniel P., Poluektov, Anton, Qian, W., Wallace, Charlotte and Wicht, Jean). (2017) Measurement of the phase difference between short- and long-distance amplitudes in the B+→ K+µ+µ− decay. European Physical Journal C, 77 (3). 161. doi:10.1140/epjc/s10052-017-4703-2 ISSN 1434-6044.
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Official URL: https://doi.org/10.1140/epjc/s10052-017-4703-2
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 pp 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: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | European Physical Journal C | ||||||
Publisher: | Springer | ||||||
ISSN: | 1434-6044 | ||||||
Official Date: | 16 March 2017 | ||||||
Dates: |
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Volume: | 77 | ||||||
Number: | 3 | ||||||
Article Number: | 161 | ||||||
DOI: | 10.1140/epjc/s10052-017-4703-2 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) |
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