Novel $B$-decay signatures of light scalars at high energy facilities

Abstract

We study the phenomenology of light scalars of masses $m_1$ and $m_2$ coupling to heavy flavour-violating vector bosons of mass $m_V$. For $m_{1,2}\lesssim$ few GeV, this scenario triggers the rare $B$ meson decays $B_s^0\to 3{\mu }^{+}3{\mu }^{-}$, $B^0\to 3{\mu }^{+}3{\mu }^{-}$, $B^{+}\to K^{+}3{\mu }^{+}3{\mu }^{-}$ and $B_s^0\to K^{0\ast }3{\mu }^{+}3{\mu }^{-}$; the last two being the most important ones for $m_1\sim m_2$. None of these signals has been studied experimentally; therefore we propose analyses to test these channels at the LHCb. We demonstrate that the reach of this facility extends to branching ratios as small as $6.0\times 10^{-9}$, $1.6\times 10^{-9}$, $5.9\times 10^{-9}$ and $1.8\times 10^{-8}$ for the aforementioned channels, respectively. For $m_{1,2}\gg \mathcal{O}(1)$ GeV, we show that slightly modified versions of current multilepton and multitau searches at the LHC can probe wide regions of the parameter space of this scenario. Altogether, the potential of the searches we propose outperform other constraints such as those from meson mixing.

arXiv comment11 pages, 14 figures

References in corpus (31)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• FastJet user manual
• Parton distributions with LHC data
• UFO - The Universal FeynRules Output
• The Strongly-Interacting Light Higgs
• New Results on B->pi, K, eta Decay Formfactors from Light-Cone Sum Rules
• The Composite Nambu-Goldstone Higgs
• Beyond the Minimal Composite Higgs Model
• Measurement of b hadron production fractions in 7 TeV pp collisions
• A unified explanation for dark matter and electroweak baryogenesis with direct detection and gravitational wave signatures
• Violation of lepton flavour universality in composite Higgs models
• One constraint to kill them all?
• A light complex scalar for the electron and muon anomalous magnetic moments
• A Natural origin for the LHCb anomalies
• Constraints on flavor-changing Z' models by B_s mixing, Z' production, and B_s -> μ^+ μ^-
• Lepton Flavor and Non-Universality from Minimal Composite Higgs Setups
• Flavor Physics and Flavor Anomalies in Minimal Fundamental Partial Compositeness
• Direct and indirect signals of natural composite Higgs models
• LHCb anomalies from a natural perspective
• Search for supersymmetry in events with four or more leptons in $\sqrt{s}=13$ TeV $pp$ collisions with ATLAS
• Charged Composite Scalar Dark Matter
• The Natural Composite Higgs
• Search for decays of neutral beauty mesons into four muons
• Recent $\mathbf{B}$ Physics Anomalies - a First Hint for Compositeness?
• Composite Higgses with seesaw EWSB
• On the behaviour of composite resonances breaking lepton flavour universality
• Purely flavor-changing Z' bosons and where they might hide
• Flavor violating processes with sgoldstino pair production
• Searching new physics in rare $B$-meson decays into multiple muons
• Heavy Flavor & Dark Sector

Cited by in corpus (3)

• Unleashing the full power of LHCb to probe Stealth New Physics
• Composite dark matter phenomenology in the presence of lighter degrees of freedom
• Following the muon track of hierarchical sectors at LHCb