000003723 001__ 3723
000003723 005__ 20230717151921.0
000003723 037__ $$aBELLE2-CONF-PROC-2023-019
000003723 041__ $$aeng
000003723 100__ $$aRoberta Volpe on behalf of the Belle II Collaboration
000003723 245__ $$aRecent BelleII results on BSM physics
000003723 260__ $$a$$c2023-07-08
000003723 300__ $$a6
000003723 500__ $$aproceedings of DIS2023: XXX International Workshop on Deep-Inelastic Scattering and Related Subjects, Michigan State University, USA, 27-31 March 2023
000003723 520__ $$aWe report on recent results obtained by the Belle II experiment related to searches for beyond the standard model physics. The B meson decay data sample used corresponds to an integrated luminosity of $L = 189$ fb$^{-1}$. In recent years, discrepancies from standard-model predictions, which suggest violation of lepton-flavor universality, have emerged in multiple measurements of B meson decays. In this document two analyses aimed to search for violation of the light lepton universality are reported: the inclusive $R(X_{e/\mu})$ measurement and an angular analysis of the $B^0 \to D^{*-} l^+ \nu_l$, with $l=e,\mu$, decays. New physics can manifests itself also with the production of new particles. The search for a long-lived spin-0 particle in $b\to s$ transitions, and its interpretation in two dark sector models, is reported as well.
000003723 6531_ $$aProceedings of DIS2023.  Light lepton universality, R(Xemu), angular asymmetries, dark sector, search for long-lived particles.
000003723 8560_ $$froberta.volpe@pg.infn.it
000003723 8564_ $$uhttps://docs.belle2.org/record/3723/files/BELLE2-CONF-PROC-2023-019.pdf$$ythis is the first version draft
000003723 8564_ $$uhttps://docs.belle2.org/record/3723/files/volpe_dis2023_proc_v1.pdf$$yafter Belle2 rev