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000292129 0881_ $$aDESY-PROC-2013-03
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000292129 1001_ $$aAli, Ahmed$$b0
000292129 1112_ $$aHelmholtz International School on Physics of Heavy Quarks and Hadrons$$cDubna$$d2013-07-15 - 2013-07-28$$gHQ2013$$wRussia
000292129 245__ $$aRare Semileptonic $B^+ \to \pi^+ \ell^+ \ell^-$ Decay
000292129 260__ $$aHamburg$$bDeutsches Elektronen-Synchrotron, DESY$$c2014
000292129 300__ $$a264-268
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000292129 520__ $$aWe present a precise calculation of the dilepton invariant-mass spectrumand branching fraction for $B^+ \to \pi^+ \ell^+ \ell^-$ ($\ell^\pm= e^\pm, \mu^\pm $) in the Standard Model (SM) based on the effectiveHamiltonian approach for the $b \to d \ell^+ \ell^-$ transitions.Theoretical estimates strongly depend on the form factors~$f_+ (q^2)$,$f_0 (q^2)$ and~$f_T (q^2)$. Of these, $f_+ (q^2)$ is well measuredin the semileptonic decays $B \to \pi \ell \nu_\ell$ and we use the$B$-factory data to parametrize it. Using an $SU (3)_F$-breaking Ansatzand Lattice-QCD data, we calculate the $B \to \pi$ form factors. Theresulting total branching fraction ${\cal B} (B^+ \to \pi^+ \mu^+\mu^-) = \left ( 1.88^{+0.32}_{-0.21} \right ) \times 10^{-8}$ isin good agreement with the experimental value obtained by the LHCbcollaboration.T = Rare Semileptonic $B^+ \to \pi^+ \ell^+ \ell^-$ Decay
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000292129 650_7 $$2INSPIRE$$abranching ratio
000292129 650_7 $$2INSPIRE$$aform factor
000292129 650_7 $$2INSPIRE$$alattice field theory
000292129 650_7 $$2INSPIRE$$adilepton: mass spectrum
000292129 650_7 $$2INSPIRE$$aB+: rare decay
000292129 650_7 $$2INSPIRE$$aB+: semileptonic decay
000292129 693__ $$0EXP:(DE-H253)HERA(machine)-20150101$$1EXP:(DE-588)4159571-3$$5EXP:(DE-H253)HERA(machine)-20150101$$aHERA$$eFacility (machine) HERA$$x0
000292129 7001_ $$aParkhomenko, Alexander$$b1
000292129 7001_ $$aRusov, Aleksey$$b2
000292129 773__ $$a10.3204/DESY-PROC-2013-03/Ali
000292129 7870_ $$0PUBDB-2015-05817$$aAli, Ahmed et.al.$$dDeutsches Elektronen-Synchrotron, DESY, Hamburg, 2014$$iIsPartOf$$rDESY-PROC-2013-03$$tProceedings, Helmholtz International School on Physics of Heavy Quarks and Hadrons (HQ2013)
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