000002043 001__ 2043
000002043 005__ 20200727023720.0
000002043 037__ $$aBELLE2-NOTE-PL-2020-018
000002043 041__ $$aeng
000002043 100__ $$aThe Belle II Collaboration
000002043 245__ $$aBelle II experiment sensitivity to the LFV decay tau -> e + alpha
000002043 260__ $$a$$c2020-07-27
000002043 300__ $$a9
000002043 520__ $$aWe study the charged lepton flavor violating decay tau -> e alpha, where alpha is a non-standard invisible boson that leaves the Belle II detector undetected. This Note presents plots showing the optimization procedure, relevant observables, and upper limit estimates using Belle II  simulated data, assuming no tau -> e alpha signal in 25/fb of integrated luminosity. Further work is in progress in order to include systematic uncertainties.
000002043 6531_ $$atau
000002043 6531_ $$aLFV
000002043 8560_ $$fivan.heredia.de.la.cruz@desy.de
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/BELLE2-NOTE-PL-2020-018.pdf$$yFulltext
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/M_3prong_presel.pdf$$yM_3prong preselection
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/VisibleEnergy_presel.pdf$$yVisible Energy preselection
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/thrust_presel.pdf$$ythrust preselection
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/M_3prong_noselfcut.pdf$$yM_3prong n-1 cuts
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/VisibleEnergy_noselfcut.pdf$$yVisible Energy n-1 cuts
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/thrust_noselfcut.pdf$$ythrust n-1 cuts
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/M_3prong_allcuts.pdf$$yM_3 prong after selection
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/VisibleEnergy_allcuts.pdf$$yVisible Energy after selection
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/thrust_allcuts.pdf$$ythrust after selection
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/p_e_psframe_Argus.pdf$$yMomentum of electron in tau pseudo-rest frame w/Argus Method
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/p_e_psframe_Thrust.pdf$$yMomentum of electron in tau pseudo-rest frame w/Thrust Method
000002043 8564_ $$uhttps://docs.belle2.org/record/2043/files/UL_vs_m_alpha.eps$$yUL vs m_alpha