Maximising the physics potential of $B^\pm\toπ^\pmμ^+μ^-$ decays
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866910496301514752 |
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| author | Marshall, Alexander Mclean McCann, Michael Andrew Patel, Mitesh Petridis, Konstantinos A. Reboud, Méril van Dyk, Danny |
| author_facet | Marshall, Alexander Mclean McCann, Michael Andrew Patel, Mitesh Petridis, Konstantinos A. Reboud, Méril van Dyk, Danny |
| contents | We present a method that maximises the experimental sensitivity to new physics contributions in $B^\pm\toπ^\pmμ^+μ^-$ decays. This method relies on performing an unbinned maximum likelihood fit to both the measured dimuon $q^2$ distribution of $B^\pm\toπ^\pmμ^+μ^-$ decays, and theory calculations at spacelike $q^2$, where QCD predictions are most reliable. We exploit the known analytic properties of the decay amplitude and employ a dispersion relation to describe the non-local hadronic contributions across spacelike and timelike $q^2$ regions. The fit stability and the sensitivity to new physics couplings and new sources of $CP$-violation are studied for current and future data-taking scenarios, with the LHCb experiment as an example. The proposed method offers a precise and reliable way to search for new physics in these decays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_06734 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Maximising the physics potential of $B^\pm\toπ^\pmμ^+μ^-$ decays Marshall, Alexander Mclean McCann, Michael Andrew Patel, Mitesh Petridis, Konstantinos A. Reboud, Méril van Dyk, Danny High Energy Physics - Phenomenology High Energy Physics - Experiment We present a method that maximises the experimental sensitivity to new physics contributions in $B^\pm\toπ^\pmμ^+μ^-$ decays. This method relies on performing an unbinned maximum likelihood fit to both the measured dimuon $q^2$ distribution of $B^\pm\toπ^\pmμ^+μ^-$ decays, and theory calculations at spacelike $q^2$, where QCD predictions are most reliable. We exploit the known analytic properties of the decay amplitude and employ a dispersion relation to describe the non-local hadronic contributions across spacelike and timelike $q^2$ regions. The fit stability and the sensitivity to new physics couplings and new sources of $CP$-violation are studied for current and future data-taking scenarios, with the LHCb experiment as an example. The proposed method offers a precise and reliable way to search for new physics in these decays. |
| title | Maximising the physics potential of $B^\pm\toπ^\pmμ^+μ^-$ decays |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2310.06734 |