0
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Decoding (pseudo)-scalar operators in leptonic and semileptonic B decays

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          We consider leptonic \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$B^-\rightarrow \ell ^- {\bar{\nu }}_\ell $$\end{document} and semileptonic \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\bar{B}} \rightarrow \pi \ell ^- {\bar{\nu }}_\ell $$\end{document} , \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\bar{B}} \rightarrow \rho \ell ^- {\bar{\nu }}_\ell $$\end{document} decays and present a strategy to determine short-distance coefficients of New-Physics operators and the CKM element \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$|V_{ub}|$$\end{document} . As the leptonic channels play a central role, we illustrate this method for (pseudo)-scalar operators which may lift the helicity suppression of the corresponding transition amplitudes arising in the Standard Model. Utilising a new result by the Belle collaboration for the branching ratio of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$B^-\rightarrow \mu ^- {\bar{\nu }}_\mu $$\end{document} , we explore theoretically clean constraints and correlations between New Physics coefficients for leptonic final states with \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mu $$\end{document} and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\tau $$\end{document} leptons. In order to obtain stronger bounds and to extract \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$|V_{ub}|$$\end{document} , we employ semileptonic \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\bar{B}} \rightarrow \pi \ell ^- {\bar{\nu }}_\ell $$\end{document} and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\bar{B}} \rightarrow \rho \ell ^- {\bar{\nu }}_\ell $$\end{document} decays as an additional ingredient, involving hadronic form factors which are determined through QCD sum rule and lattice calculations. In addition to a detailed analysis of the constraints on the New Physics contributions following from current data, we make predictions for yet unmeasured decay observables, compare them with experimental constraints and discuss the impact of CP-violating phases of the New-Physics coefficients.

          Related collections

          Most cited references2

          • Record: found
          • Abstract: not found
          • Article: not found

          CP violation and the CKM matrix: assessing the impact of the asymmetric B factories

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Model-independent description ofB→πlνdecays and a determination of|Vub|

              Bookmark

              Author and article information

              Contributors
              rjaarsma@nikhef.nl
              Journal
              Eur Phys J C Part Fields
              Eur Phys J C Part Fields
              The European Physical Journal. C, Particles and Fields
              Springer Berlin Heidelberg (Berlin/Heidelberg )
              1434-6044
              1434-6052
              10 November 2018
              10 November 2018
              2018
              : 78
              : 11
              : 911
              Affiliations
              [1 ]ISNI 0000 0004 0646 2193, GRID grid.420012.5, Nikhef, ; Science Park 105, 1098 XG Amsterdam, The Netherlands
              [2 ]ISNI 0000 0004 1754 9227, GRID grid.12380.38, Faculty of Science, , Vrije Universiteit Amsterdam, ; 1081 HV Amsterdam, The Netherlands
              Article
              6393
              10.1140/epjc/s10052-018-6393-9
              6394280
              9eb0406b-b4f6-46c3-b880-63eae1efb652
              © The Author(s) 2018

              Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

              Funded by SCOAP 3

              History
              : 2 October 2018
              : 27 October 2018
              Funding
              Funded by: FundRef https://doi.org/10.13039/501100003246, Nederlandse Organisatie voor Wetenschappelijk Onderzoek;
              Award ID: FOM Programme 156, “Higgs as Probe and Portal”
              Categories
              Regular Article - Theoretical Physics
              Custom metadata
              © SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2018

              Comments

              Comment on this article