Search for a dimuon resonance in the ${\rm Y}$ mass region

Abstract

A search is performed for a spin-0 boson, $\varphi$, produced in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, using prompt $\varphi \to {\mu }^{+}{\mu }^{-}$ decays and a data sample corresponding to an integrated luminosity of approximately 3.0 ${\mathrm{fb}}^{-1}$ collected with the LHCb detector. No evidence is found for a signal in the mass range from 5.5 to 15 GeV. Upper limits are placed on the product of the production cross-section and the branching fraction into the dimuon final state. The limits are comparable to the best existing over most of the mass region considered and are the first to be set near the ${\rm Y}$ resonances.

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2018-008.html

References in corpus (2)

• Gauge Singlet Scalars as Cold Dark Matter
• Collider constraints on light pseudoscalars

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• Searching in CMS Open Data for Dimuon Resonances with Substantial Transverse Momentum
• Exploring new possibilities to discover a light pseudo-scalar at LHCb
• Probing Dark Sector CP Violation with Electric Dipole Moments and Colliders