Conference Presentation (Other)

PUBDB-2020-05053

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png First Results and Prospects for the LFV decay $𝞽→𝓵+𝞪$(invisible) at Belle II

Tenchini, F. (Corresponding author)DESY*

2020

Abstract: The Belle II experiment at SuperKEKB, an asymmetric e+e- collider, aims at a total integrated luminosity of 50 ab-1, to pursue a rich program of Standard Model and Beyond the Standard Model physics. In its first year of operation, approximately 10 fb-1 were collected at the Upsilon(4S) resonance, with about 100 fb-1 expected by the end of 2020. This results in a sizeable sample of tau pairs, enabling detailed studies of Standard and Beyond the Standard Model measurements, including searches for Lepton Flavor Violating (LFV) decays. One of the first channels where competitive limits are expected is the tau -> e + alpha(invisible) process, where alpha is a Goldstone boson. Here, the currently best limit has been obtained by ARGUS with an integrated luminosity of 475 pb-1. Belle II is expected to be able to improve on this result already with the data recorded. This contribution will discuss selected analysis details and present first preliminary results and the prospects for future larger datasets.

Note: Virtual Conference / Talk given on Jul 30, 2020 on behalf of the Belle Collaboration

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Contributing Institute(s):

1. beauftragt von FH (Belle)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. KEK: BELLE I/II

Appears in the scientific report 2020

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