Measurement of angular parameters from the decay $\mathrm{B}^0 \to \mathrm{K}^{*0} \mu^+ \mu^-$ in proton-proton collisions at $\sqrt{s} = $ 8 TeV

Bakhshiansohi, Hamed;Bondu, Olivier;Brochet, Sébastien;Bruno, Giacomo;CMS Collaboration;et.al.
(2018) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B781, p. 517-541 (2018)

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Authors
  • Bakhshiansohi, HamedUCLouvain
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  • Bondu, OlivierUCLouvain
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  • Brochet, SébastienUCLouvain
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  • Caputo, ClaudioUCLouvain
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  • Caudron, AdrienUCLouvain
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  • David, PieterUCLouvain
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  • De Visscher, SimonUCLouvain
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  • Delcourt, MartinUCLouvain
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  • Komm, MatthiasUCLouvain
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  • Krintiras, GeorgiosUCLouvain
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  • Magitteri, AlessioUCLouvain
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  • Mertens, AlexandreUCLouvain
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  • Musich, MarcoUCLouvain
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  • Piotrzkowski, KrzysztofUCLouvain
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  • Saggio, AlessiaUCLouvain
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  • Vidal Marono, MiguelUCLouvain
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  • Wertz, SébastienUCLouvain
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  • Zobec, JozeUCLouvain
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  • CMS Collaboration
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  • et. al.
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Abstract
Angular distributions of the decay B0→K⁎0μ+μ− are studied using a sample of proton–proton collisions at s=8TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 20.5fb−1 . An angular analysis is performed to determine the P1 and P5′ parameters, where the P5′ parameter is of particular interest because of recent measurements that indicate a potential discrepancy with the standard model predictions. Based on a sample of 1397 signal events, the P1 and P5′ parameters are determined as a function of the dimuon invariant mass squared. The measurements are in agreement with predictions based on the standard model.
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Citations

Bakhshiansohi, H., Bondu, O., Brochet, S., Bruno, G., Caputo, C., Caudron, A., David, P., De Visscher, S., Delaere, C., Delcourt, M., François, B., Giammanco, A., Komm, M., Krintiras, G., Lemaitre, V., Magitteri, A., Mertens, A., Musich, M., Piotrzkowski, K., et al. (2018). Measurement of angular parameters from the decay $\mathrm{B}^0 \to \mathrm{K}^{*0} \mu^+ \mu^-$ in proton-proton collisions at $\sqrt{s} = $ 8 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B781, 517-541. https://doi.org/10.1016/j.physletb.2018.04.030 (Original work published 2018)