Search for long-lived scalar particles in B+→K+χ(μ+μ−) decays

Abstract : A search for a long-lived scalar particle χ is performed, looking for the decay B+→K+χ with χ→μ+μ− in pp collision data corresponding to an integrated luminosity of 3fb−1, collected by the LHCb experiment at centre-of-mass energies of s√=7 and 8TeV. This new scalar particle, predicted by Hidden Sector models, is assumed to have a narrow width. The signal would manifest itself as an excess in the dimuon invariant mass distribution over the Standard Model background. No significant excess is observed in the accessible ranges of mass 250
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http://hal.in2p3.fr/in2p3-01433131
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Submitted on : Thursday, January 12, 2017 - 3:00:43 PM
Last modification on : Monday, June 3, 2019 - 1:38:03 PM

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R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Search for long-lived scalar particles in B+→K+χ(μ+μ−) decays. Physical Review D, American Physical Society, 2017, 95, pp.071101(R). ⟨10.1103/PhysRevD.95.071101⟩. ⟨in2p3-01433131⟩

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