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001     292129
005     20211110132740.0
024 7 _ |a 10.3204/DESY-PROC-2013-03/Ali
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037 _ _ |a PUBDB-2015-05842
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088 1 _ |a DESY-PROC-2013-03
088 _ _ |a DESY-PROC-2013-03
|2 DESY
100 1 _ |a Ali, Ahmed
|b 0
111 2 _ |a Helmholtz International School on Physics of Heavy Quarks and Hadrons
|g HQ2013
|c Dubna
|d 2013-07-15 - 2013-07-28
|w Russia
245 _ _ |a Rare Semileptonic $B^+ \to \pi^+ \ell^+ \ell^-$ Decay
260 _ _ |c 2014
|b Deutsches Elektronen-Synchrotron, DESY
|a Hamburg
300 _ _ |a 264-268
336 7 _ |a Conference Paper
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336 7 _ |a INPROCEEDINGS
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520 _ _ |a We 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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650 _ 7 |a branching ratio
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650 _ 7 |a form factor
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650 _ 7 |a lattice field theory
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650 _ 7 |a dilepton: mass spectrum
|2 INSPIRE
650 _ 7 |a B+: rare decay
|2 INSPIRE
650 _ 7 |a B+: semileptonic decay
|2 INSPIRE
693 _ _ |a HERA
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700 1 _ |a Parkhomenko, Alexander
|b 1
700 1 _ |a Rusov, Aleksey
|b 2
773 _ _ |a 10.3204/DESY-PROC-2013-03/Ali
787 0 _ |a Ali, Ahmed et.al.
|d Deutsches Elektronen-Synchrotron, DESY, Hamburg, 2014
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|r DESY-PROC-2013-03
|t Proceedings, Helmholtz International School on Physics of Heavy Quarks and Hadrons (HQ2013)
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