TY  - CONF
AU  - Ali, Ahmed
AU  - Parkhomenko, Alexander
AU  - Rusov, Aleksey
TI  - Rare Semileptonic B<sup>+</sup> → π<sup>+</sup> <i>l</i><sup>+</sup> <i>l</i><sup>−</sup> Decay
IS  - DESY-PROC-2013-03
CY  - Hamburg
PB  - Deutsches Elektronen-Synchrotron, DESY
M1  - PUBDB-2015-05842
M1  - DESY-PROC-2013-03
SP  - 264-268
PY  - 2014
AB  - We present a precise calculation of the dilepton invariant-mass spectrumand branching fraction for B<sup>+</sup> → π<sup>+</sup> <i>l</i><sup>+</sup> <i>l</i><sup>−</sup> (<i>l</i><sup>±</sup> = e<sup>±</sup>, μ<sup>±</sup> ) in the Standard Model (SM) based on the effectiveHamiltonian approach for the b → d <i>l</i><sup>+</sup> <i>l</i><sup>−</sup> transitions.Theoretical estimates strongly depend on the form factors f<sub>+</sub> (q<sup>2</sup>),f<sub>0</sub> (q<sup>2</sup>) and f<sub>T</sub> (q<sup>2</sup>). Of these, f<sub>+</sub> (q<sup>2</sup>) is well measuredin the semileptonic decays B → π<i>l</i>ν<sub><i>l</i></sub> and we use theB-factory data to parametrize it. Using an SU (3)<sub>F</sub>-breaking Ansatzand Lattice-QCD data, we calculate the B → π form factors. Theresulting total branching fraction <span style="font-family:helvetica"><i>B</i> (B<sup>+</sup> → π<sup>+</sup> μ<sup>+</sup>μ<sup>−</sup>) = ( 1.88<sup>+0.32</sup><sub>−0.21</sub> ) ×10<sup>−8</sup> isin good agreement with the experimental value obtained by the LHCbcollaboration.T = Rare Semileptonic B<sup>+</sup> → π<sup>+</sup> <i>l</i><sup>+</sup> <i>l</i><sup>−</sup> Decay
T2  - Helmholtz International School on Physics of Heavy Quarks and Hadrons
CY  - 15 Jul 2013 - 28 Jul 2013, Dubna (Russia)
Y2  - 15 Jul 2013 - 28 Jul 2013
M2  - Dubna, Russia
KW  - branching ratio (INSPIRE)
KW  - form factor (INSPIRE)
KW  - lattice field theory (INSPIRE)
KW  - dilepton: mass spectrum (INSPIRE)
KW  - B+: rare decay (INSPIRE)
KW  - B+: semileptonic decay (INSPIRE)
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)15
DO  - DOI:10.3204/DESY-PROC-2013-03/Ali
UR  - https://bib-pubdb1.desy.de/record/292129
ER  -