Model independent analysis of the decay B -> K+l(+)+l(-)

Pak, Namık Kemal
Rekalo, MP
We demonstrate that the Dalitz-distributions in energies of both unpolarized leptons, produced in the decays B --> K + l(+) + l(-) for l= e, mu, tau, can be a sensitive test for possible new physics beyond the Standard Model. We find measurable characteristics (including the polarization of leptons as well) which are independent of all dirty non-perturbative physics needed in calculating the hadronic form factors. Such characteristics can be used to estimate the presence of possible non-standard mechanisms in a model-independent manner.


Two Higgs doublet model and lepton polarization in the B -> K tau(+)tau(-) decay
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The decay width, forward-backward asymmetry and tau lepton longitudinal and transversal polarization for the exclusive B --> K tau(+)tau(-) decay in a two Higgs doubler model are computed. It is shown that the forward-backward asymmetry and longitudinal polarization of the tau lepton are very effective tools for establishing near physics.
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Aad, G.; et. al. (Elsevier BV, 2013-08-09)
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Rekalo, MP; Tomasi-Gustafsson, E (Elsevier BV, 2003-02-24)
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A measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton-proton collisions at root s = 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. The measurement is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb(-1). The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86(-0.75)(+...
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Aad, G.; et. al. (Elsevier BV, 2012-01-05)
The cross section for the production of W bosons with subsequent decay W -> tau nu(tau) is measured with the ATLAS detector at the LHC. The analysis is based on a data sample that was recorded in 2010 at a proton-proton center-of-mass energy of root s = 7 TeV and corresponds to an integrated luminosity of 34 pb(-1). The cross section is measured in a region of high detector acceptance and then extrapolated to the full phase space. The product of the total W production cross section and the W -> tau nu(tau) ...
Citation Formats
N. K. Pak and M. Rekalo, “Model independent analysis of the decay B -> K+l(+)+l(-),” PHYSICS LETTERS B, pp. 405–410, 1998, Accessed: 00, 2020. [Online]. Available: