Abstract

A search for the fully reconstructed Bs0\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {B}_s^0 $$\\end{document}→ μ+μ−γ decay is performed at the LHCb experiment using proton-proton collisions at s\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ \\sqrt{s} $$\\end{document} = 13 TeV corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is found and upper limits on the branching fraction in intervals of the dimuon mass are setBBs0→μ+μ−γ<4.2×10−8,mμ+μ−∈2mμ1.70GeV/c2,BBs0→μ+μ−γ<7.7×10−8,mμ+μ−∈1.70, 2.88GeV/c2,BBs0→μ+μ−γ<4.2×10−8,mμ+μ−∈3.92mBs0GeV/c2,\\documentclass[12pt]{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$ {\\displaystyle \\begin{array}{cc}\\mathcal{B}\\left({B}_s^0\ o {\\mu}^{+}{\\mu}^{-}\\gamma \\right)<4.2\ imes {10}^{-8},& m\\left({\\mu}^{+}{\\mu}^{-}\\right)\\in \\left[2{m}_{\\mu },1.70\\right]\ extrm{GeV}/{c}^2,\\\\ {}\\mathcal{B}\\left({B}_s^0\ o {\\mu}^{+}{\\mu}^{-}\\gamma \\right)<7.7\ imes {10}^{-8},&\\ m\\left({\\mu}^{+}{\\mu}^{-}\\right)\\in \\left[\ extrm{1.70,2.88}\\right]\ extrm{GeV}/{c}^2,\\\\ {}\\mathcal{B}\\left({B}_s^0\ o {\\mu}^{+}{\\mu}^{-}\\gamma \\right)<4.2\ imes {10}^{-8},& m\\left({\\mu}^{+}{\\mu}^{-}\\right)\\in \\left[3.92,{m}_{B_s^0}\\right]\ extrm{GeV}/{c}^2,\\end{array}} $$\\end{document}at 95% confidence level. Additionally, upper limits are set on the branching fraction in the [2mμ, 1.70] GeV/c2 dimuon mass region excluding the contribution from the intermediate ϕ(1020) meson, and in the region combining all dimuon-mass intervals.

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