Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay properties and search for the $B^0\to {\mu }^{+}{\mu }^{-}$ and $B_s^0\to {\mu }^{+}{\mu }^{-}\gamma$ decays

Abstract

An improved measurement of the decay $B_s^0\to {\mu }^{+}{\mu }^{-}$ and searches for the decays $B^0\to {\mu }^{+}{\mu }^{-}$ and $B_s^0\to {\mu }^{+}{\mu }^{-}\gamma$ are performed at the LHCb experiment using data collected in proton-proton collisions at $\sqrt{s}=7,8$ and $13$ TeV, corresponding to integrated luminosities of 1, 2 and 6 fb${}^{-1}$, respectively. The $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and effective lifetime are measured to be $\mathcal{B}(B_s^0\to {\mu }^{+}{\mu }^{-})=\left(3.09_{-0.43-0.11}^{+0.46+0.15}\right)\times 10^{-9}$ and $\tau (B_s^0\to {\mu }^{+}{\mu }^{-})=(2.07\pm 0.29\pm 0.03)$ ps, respectively, where the uncertainties include both statistical and systematic contributions. No significant signal for $B^0\to {\mu }^{+}{\mu }^{-}$ and $B_s^0\to {\mu }^{+}{\mu }^{-}\gamma$ decays is found and the upper limits $\mathcal{B}(B^0\to {\mu }^{+}{\mu }^{-})<2.6\times 10^{-10}$ and $\mathcal{B}(B_s^0\to {\mu }^{+}{\mu }^{-}\gamma )<2.0\times 10^{-9}$ at 95% confidence level are determined, where the latter is limited to the range $m_{\mu \mu }>4.9$ GeV$/c^2$. Additionally, the ratio between the $B^0\to {\mu }^{+}{\mu }^{-}$ and $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fractions is measured to be ${\mathcal{R}}_{{\mu }^{+}{\mu }^{-}}<0.095$ at 95% confidence level. The results are in agreement with the Standard Model predictions.

arXiv commentAll figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-008.html. V3 contains the version published in Phys. Rev. D

References in corpus (76)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Brief Introduction to PYTHIA 8.1
• Asymptotic formulae for likelihood-based tests of new physics
• Minimal Flavour Violation: an effective field theory approach
• LHCb Detector Performance
• sPlot: a statistical tool to unfold data distributions
• Test of lepton universality with $B^0\to K^{\ast 0}{\ell }^{+}{\ell }^{-}$ decays
• FLAG Review 2019
• Kernel Estimation in High-Energy Physics
• Observation of the rare $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay from the combined analysis of CMS and LHCb data
• B_{s,d} -> l+ l- in the Standard Model with Reduced Theoretical Uncertainty
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Search for lepton-universality violation in $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• First evidence for the decay Bs -> mu+ mu-
• $B$- and $D$-meson leptonic decay constants from four-flavor lattice QCD
• Measurement of $CP$-averaged observables in the $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay
• Probing New Physics via the $B_s^0\to {\mu }^{+}{\mu }^{-}$ Effective Lifetime
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and effective lifetime and search for $B^0\to {\mu }^{+}{\mu }^{-}$ decays
• Measurement of the track reconstruction efficiency at LHCb
• $SU(2)\times U(1)$ gauge invariance and the shape of new physics in rare $B$ decays
• Relations between ΔM_{s,d} and B_{s,d}\to μ\barμin Models with Minimal Flavour Violation
• Measurement of b hadron production fractions in 7 TeV pp collisions
• Study of the rare decays of $B_s^0$ and $B^0$ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
• Strong constraints on the rare decays Bs -> mu+ mu- and B0 -> mu+ mu-
• Mass distributions marginalized over per-event errors
• Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2
• Determination of the quark coupling strength $|V_{ub}|$ using baryonic decays
• Measurement of the fragmentation fraction ratio $f_s/f_d$ and its dependence on $B$ meson kinematics
• B-meson decay constants from improved lattice NRQCD and physical u, d, s and c sea quarks
• Power-enhanced leading-logarithmic QED corrections to $B_q\to {\mu }^{+}{\mu }^{-}$
• B_{s,d} -> l+ l- in a Two-Higgs-Doublet Model
• Measurement of b-hadron fractions in 13 TeV pp collisions
• BCVEGPY: An Event Generator for Hadronic Production of the B_c Meson
• The semileptonic decays $B/B_s\to (\pi ,K)(l^{+}{l}^{-},l\nu ,\nu \bar{\nu })$ in the perturbative QCD approach beyond the leading-order
• Angular analysis of the $B^{+}\to K^{\ast +}{\mu }^{+}{\mu }^{-}$ decay
• Analysis of neutral $B$-meson decays into two muons
• Measurement of $b$ hadron masses in exclusive $J/\psi$ decays with the CDF detector
• Performance of the Muon Identification at LHCb
• Measurements of Charmless Hadronic Two-Body B Meson Decays and the Ratio cal B(B--> DK)/ cal B(B--> Dπ)
• Reweighting with Boosted Decision Trees
• Measurement of properties of B${}_{\mathrm{s}}^0\to {\mu }^{+}{\mu }^{-}$ decays and search for B${}^0\to {\mu }^{+}{\mu }^{-}$ with the CMS experiment
• Rare radiative leptonic decays B_{d,s}-> l^+l^-γ
• Precise measurement of the $f_s/f_d$ ratio of fragmentation fractions and of $B_s^0$ decay branching fractions
• Measurement of b-hadron masses
• Measurements of Branching Fractions and Direct CP Asymmetries for B -> K pi, B->pi pi and B->to KK Decays
• New methods for B meson decay constants and form factors from lattice NRQCD
• Mass of the b-quark and B-decay constants from Nf=2+1+1 twisted-mass Lattice QCD
• Measurement of the CKM angle $\gamma$ from a combination of LHCb results
• B_q -> l^+ l^- gamma decays in light cone QCD
• $B_s\to {\mu }^{+}{\mu }^{-}$ as current and future probe of new physics
• Measurement of the Decay Amplitudes and Branching Fractions of $B\to J/\psi K^{\ast }$ and $B\to J/\psi K$ Decays
• Study of $B_{s,d}\to l^{+}{l}^{-}\gamma$ Decays
• $B_{d,s}\to \gamma \ell \bar{\ell }$ decay with an energetic photon
• Radiative Dileptonic Decays of B Mesons
• Improved Measurements of the Branching Fractions for B0 --> pi+pi- and B0 --> K+pi-, and a Search fro B0 --> K+K-
• Measurement of Branching Fractions and Charge Asymmetries for Exclusive B Decays to Charmonium
• Measurement of Branching Fractions and Charge Asymmetries for Two-Body B Meson Decays with Charmonium
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• First observation of the decay $B_s^0\to K^{-}{\mu }^{+}{\nu }_{\mu }$ and a measurement of $|V_{ub}|/|V_{cb}|$
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• Measurement of the $B_c^{-}$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions
• Measurements of the absolute branching fractions of $B^{+}\to X_{c\bar{c}}{K}^{+}$ and $B^{+}\to {\bar{D}}^{(\ast )0}{\pi }^{+}$ at Belle
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• Rare (B -> l^+ l^- gamma) decay and new physics effects
• Study of $B_s\to {\ell }^{+}{\ell }^{-}\gamma$ decays in covariant quark model
• $B_s^0\to {\ell }^{+}{\ell }^{-}\gamma$ as a Test of Lepton Flavor Universality
• BCVEGPY2.2: A Newly Upgraded Version for Hadronic Production of the Meson $B_c$ and Its Excited States
• Effective lifetime measurements in the $B_s^0\to K^{+}{K}^{-}$, $B^0\to K^{+}{\pi }^{-}$ and $B_s^0\to {\pi }^{+}{K}^{-}$ decays
• Bs to mu mu gamma from Bs to mu mu
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• High Precision Mass Measurements in $\Psi$ and ${\rm Y}$ Families Revisited
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• Evidence for $B^{+}\to h_c{K}^{+}$ and observation of ${\eta }_c(2S)\to p\bar{p}{\pi }^{+}{\pi }^{-}$
• Measurement of the branching fraction of the $B^0\to D_s^{+}{\pi }^{-}$ decay

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• Observation of charge-parity symmetry breaking in baryon decays
• The 2HD+a model for a combined explanation of the possible excesses in the CDF ${\mathbf{M}}_{\mathbf{W}}$ measurement and $(\mathbf{g}-2{)}_{\mu }$ with Dark Matter
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• Methods for high-precision determinations of radiative-leptonic decay form factors using lattice QCD
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• Flavor Physics Constraints on Left-Right Symmetric Models with Universal Seesaw
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• Prospects for studies of $D^{\ast 0}\to {\mu }^{+}{\mu }^{-}$ and $B_{(s)}^{\ast 0}\to {\mu }^{+}{\mu }^{-}$ decays
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• Charged Higgs decay to $W^{\pm }H$ at a high energy lepton collider
• Electroweak Penguin Decays of $b$-Flavoured Hadrons
• Anomalous gauge couplings vis-$\grave{a}$-vis $(g-2{)}_{\mu }$ and flavor observables
• FunTuple: A new N-tuple component for offline data processing at the LHCb experiment
• Maximising the physics potential of $B^{\pm }\to {\pi }^{\pm }{\mu }^{+}{\mu }^{-}$ decays
• Measurement of the dependence of the hadron production fraction ratio $f_{\mathrm{s}}/f_{\mathrm{u}}$ and $f_{\mathrm{d}}/f_{\mathrm{u}}$ on B meson kinematic variables in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Probing B-Anomalies via Dimuon Tails at a Future Collider
• Questions of flavor physics and neutrino mass from a flipped hypercharge
• Discriminating 1D new physics solutions in $b\to s\ell \ell$ decays
• Enhanced $B_q\to \ell {\ell }^{\prime }$ and $B\to (K,\pi )\ell {\ell }^{\prime }$ in light of $(g-2{)}_{\mu }$
• Search for the baryon- and lepton-number violating decays $B^0\to p{\mu }^{-}$ and $B_s^0\to p{\mu }^{-}$
• Rare decays of the $B_s-$meson into four charged leptons in the framework of the Standard Model
• Theoretical Review of Rare B Decays
• Precision Tests in $b\to s{\ell }^{+}{\ell }^{-}$ ($\ell =e,\mu$) at FCC-ee
• Three decades of FCNC studies in 3-3-1 model with right-handed neutrinos: from $Z^{\prime }$-dominance to the alignment limit
• Enhancing $B_s\to e^{+}{e}^{-}$ to an Observable Level in the Two-Higgs-Doublet Model
• Flavor Anomalies and Quark-Lepton Unification
• Search for $B_{(s)}^{\ast 0}\to {\mu }^{+}{\mu }^{-}$ in $B_c^{+}\to {\pi }^{+}{\mu }^{+}{\mu }^{-}$ decays
• Probing mixed-state dark matter and flavor observables in a scalar-assisted baryonic gauge theory
• Lepton Flavour Universality tests and Lepton Flavour Violation searches at LHCb
• Flavour Physics at LHCb -- 50 years of the KM paradigm
• Re-evaluation of the isoscalar mixing angle within selected mesonic nonets