000000770 001__ 770
000000770 005__ 20180209151253.0
000000770 037__ $$aBELLE2-TALK-CONF-2018-010
000000770 041__ $$aeng
000000770 088__ $$aBELLE2-TALK-DRAFT-2018-001
000000770 100__ $$aMoritz Gelb
000000770 245__ $$aSearch for the rare decay B+ --> l+ nu gamma at Belle and Belle I
000000770 260__ $$aEpiphany 2018$$c2018-01-11
000000770 300__ $$amult. p
000000770 500__ $$a15 min
000000770 520__ $$aThe Belle experiment recored during its runtime a dataset corresponding to an integrated luminosity of 711 fb^-1 at the Upsilon(4S) resonance. Based on this dataset the hadronically tagged analysis of the rare decay B^+ -> l^+ nu gamma determined an upper limit of BR(B^+ -> l^+ nu gamma) < 3.5 x 10^-6. For the upcoming Belle II experiment new analysis tools have been developed which also allow to re-analyze the Belle data and make it possible to do a first measurement of this decay. 
000000770 8560_ $$fdoris.yangsoo.kim@desy.de
000000770 8564_ $$uhttps://docs.belle2.org/record/770/files/BELLE2-TALK-CONF-2018-010.pdf