New strategies for long-lived particles searches at LHCb: BuSca (Buffer Scanner)

by Arantza Oyanguren

Thursday Dec 11, 2025, 12:30 PM → 1:30 PM America/Los_Angeles

48/1-112A/B - Redwood A/B (SLAC)

The new fully software-based trigger of the LHCb experiment at CERN
operates at a 30 MHz data rate, opening a search window into previously
unexplored regions of the physics phase space. The BuSca (Buffer
Scanner) project at LHCb acquires and analyses data in real time, prior
to any trigger decision, extending sensitivity to new lifetimes and mass
ranges thanks to the recently deployed Downstream algorithm,
specifically designed to reconstruct displaced tracks that originate
downstream of the vertex detector. BuSca identifies hotspots in the data
indicative of potential new long-lived particle candidates in a
model-independent manner, providing strategic guidance for developing
new trigger lines. To control background, regions with minimal detector
material interactions are selected, and pairs of same-sign tracks are
used to suppress combinatorial background. In this talk, I will present
the current status and future prospects of this pioneering framework,
along with the results from the analysis of the first data.

 

https://stanford.zoom.us/j/98973156241?pwd=cEU5RFdlVXoyc0JTeTlDMkozKzQ5UT09

Seminar_Arantza.pdf